STABILITY AND NEIMARK-SACKER BIFURCATION OF A SEMI-DISCRETE POPULATION MODEL
|
|
- Jesse Brown
- 5 years ago
- Views:
Transcription
1 Journal of Applied Analsis and Computation Website: Volume 4, Number 4, November 14 pp STABILITY AND NEIMARK-SACKER BIFURCATION OF A SEMI-DISCRETE POPULATION MODEL Cheng Wang 1 and Xiani Li 1, Abstract In this paper, a semi-discrete model is derived for a nonlinear simple population model, and its stabilit and bifurcation are investigated b invoking a ke lemma we present. Our results displa that a Neimark- Sacker bifurcation occurs in the positive fied point of this sstem under certain parametric conditions. B using the Center Manifold Theorem and bifurcation theor, the stabilit of invariant closed orbits bifurcated is also obtained. The numerical simulation results not onl show the correctness of our theoretical analsis, but also ehibit new and interesting dnamics of this sstem, which do not eist in its corresponding continuous version. Kewords Semi-discrete population model, stabilit, Neimark-Sacker bifurcation, Lapunov eponent, Chaos. MSC 9A11, 7F45, 7G5. 1. Introduction In order to describe the control of a single population of cells, Nazarenko [] proposed the nonlinear dela differential euation dξ dt = pξt + ξt r + ξ m, t, 1.1 t ω where p,, r, ω, +, m {1,,...} and > pr, ξt is the size of the population at time t, p is the death rate, the feedback is given b the function fz, zt zt ω = r+z m t ω, and ω is the generation time. Since then, E.1.1 has been well studied b several authors see [5, 16, 7, ]. In recent ears, the modern theories of difference euations have been widel applied in the discrete sstems of computer science, econom, neutral net, ecolog and control theor etc., especiall, in the applications of population dnamics. Man authors see [1, ] have argued that the discrete sstems governed b difference e- uations are more appropriate than the continuous counterparts, particularl, when the populations have nonoverlapping generations. Li [17] studied the dnamics of a discrete food-limited population model with time dela. Saker [6] investigated the nonlinear periodic solutions, oscillation and attractivit of discrete nonlinear dela the corresponding author. address:mathli@zu.edu.cnxiani Li 1 College of Mathematical Science, Yangzhou Universit, Yangzhou, 5, China The authors were supported b National Natural Science Foundation of China and the NSF of Yangzhou Universit.
2 4 C. Wang & X. Y. Li population model. Liz [18] considered the global stabilit for a discrete population model. Song and Peng [8] discussed the periodic solutions of a nonautonomous periodic model of population with continuous and discrete time. Li [19] studied the global stabilit and oscillation in nonlinear difference euations of population dnamics. Zhang etc. [4] studied the periodic solutions of a single species discrete population model with periodic harvest/stock. It is well known that the dnamics including stabilit, bifurcations and chaos etc. of a sstem have been a popular subject see [, 4, 6 8, 1 14,, 1, 4,, 5]. In this paper, motivated b the above work we discuss the analogue of the E Without loss of generalit, we ma assume ω = 1 in 1.1. In fact, b letting s = t ω, namel, ξt = ξsω = ηs, 1.1 is reduced to dη ds = pωηs + ωηs r + η m, s s 1 B resetting p b p ω and b ω, E.1. becomes dη ds = pηs + ηs r + η m, s s 1 This is just 1.1 with ω = 1. Suppose that the average growth rate in 1. changes at regular intervals of time, then we ma incorporate this aspect into 1. and obtain the following version of 1. 1 dηs = p + ηs ds r + η m, s 1,,,..., 1.4 [s 1] where [s 1] denotes the integer part of s 1, s [1, +. Euation of tpe 1.4 is known as differential euation with piecewise constant arguments and these euations occup a position midwa between differential and difference euations. B a solution of E. 1.4, we mean a function ηs, which is defined for s [1, +, and possesses the following properties: i ηs is continuous on [1, + ; ii the derivative dηs/ds eists at each point s [1, + with the possible eception of the point s {1,,,...}, where the left-side derivative eists; iii the E. 1.4 is satisfied on each internal [k, k + 1 with k = 1,,,... B integrating 1.4 on an interval [n, n + 1, n = 1,,,..., we can get ηs = ηn ep p + Letting s n + 1, we have ηn + 1 = ηn ep r + η m n 1 which is the discrete analog of E. 1. without dela. Let { n = ηn 1, s n. 1.5 p + r + η m, 1.6 n 1 n = ηn, 1.7
3 Stabilit and Neimark-Sacker bifurcation 41 then we arrive in a discrete sstem as follows: n + 1 = n, n + 1 = n ep p + r + m, n 1.8 where p,, r and m are defined as in E The main aim of this paper is to investigate the dnamics of the sstem 1.8 b using the Center Manifold Theorem, bifurcation theor [, 9, 15], [5, 9] and numerical simulations. It is shown that the sstem 1.8 possesses a Neimark-Sacker bifurcation and other comple dnamics under certain parametric conditions, which have not been considered in an known literature. The rest of this paper is organized as follows. The eistence and stabilit of the fied points for the sstem 1.8 are analzed in the net section. In Section, the sufficient conditions of the eistence for Neimark-Sacker bifurcation are obtained. In Section 4, numerical simulations are presented, which not onl illustrate our theoretical results, but also ehibit other comple dnamics of the sstem 1.8, and the Lapunov eponents are computed numericall to confirm some of its dnamics. A brief conclusion is given in Section 5.. Eistence and stabilit of fied point In this section, we first determine the eistence of the fied points of the sstem 1.8, then investigate their stabilit. The fied points of the sstem 1.8 satisf the following euations: =, ep p + r + m =. B some computations to the sstem.1, it is eas to obtain: i the trivial fied point E,, which alwas eists for all parameter values;.1 ii the uniue positive fied point E +, feasible because of > pr, where 1/m 1/m pr pr =, =.. p p Now investigate the local stabilit of ever fied point of the sstem 1.8. The Jacobian matri of the sstem 1.8 at a fied point E, is 1 J = ep p + m m 1 r + m r + m ep p + The characteristic euation associated with. is r + m.. λ TrJλ + DetJ =,.4
4 4 C. Wang & X. Y. Li where λ is the eigenvalue, TrJ and DetJ are the trace and determinant of. respectivel, namel, TrJ = ep p + r + m.5 and Hence the sstem 1.8 is see [14] m m 1 DetJ = ep p + r + m r + m..6 i a dissipative dnamical sstem if and onl if p ep m m 1 + r + m r + m < 1; ii a conservative dnamical sstem if and onl if p ep m m 1 + r + m r + m = 1; iii an undissipated dnamical sstem otherwise. In order to stud the local stabilit and bifurcation for a fied point of a general D sstem, the following lemma will be ver useful and even essential. Lemma.1. Let F λ = λ + Bλ + C, where B and C are two real constants. Suppose λ 1 and λ are two roots of F λ =. Then the following statements hold. i If F 1 >, then i.1 λ 1 < 1 and λ < 1 if and onl if F 1 > and C < 1; i. λ 1 = 1 and λ 1 if and onl if F 1 = and B ; i. λ 1 < 1 and λ > 1 if and onl if F 1 < ; i.4 λ 1 > 1 and λ > 1 if and onl if F 1 > and C > 1; i.5 λ 1 and λ are a pair of conjugate comple roots and λ 1 = λ = 1 if and onl if < B < and C = 1; i.6 λ 1 = λ = 1 if and onl if F 1 = and B =. ii If F 1 =, namel, 1 is one root of F λ =, then the other root λ satisfies λ = <, >1 if and onl if C = <, >1. iii If F 1 <, then F λ = has one root ling in 1,. Moreover, Proof. iii.1 the other root λ satisfies λ < = 1 if and onl if F 1 < =; iii. the other root λ satisfies 1 < λ < 1 if and onl if F 1 >. The proof for Lemma.1 is simple and omitted here. Remark.1. i When F 1 >, our results are the same as the ones in [1] ecept the cases ii and vi. Corresponding to the above i., the conclusion in [1] is stated as: λ 1 = 1 and λ 1 if and onl if F 1 = and B,. We think, B is redundant. Otherwise, λ 1 + λ =, together with λ 1 = 1, implies λ = 1, which is contrar to F 1 >. Therefore, B should be kicked out.
5 Stabilit and Neimark-Sacker bifurcation 4 So, our results correct the case iv of Lemma.. in [1] and give a new conclusion vi which is not considered in an known literature. ii The results for the cases F 1 = and F 1 < are completel new. Net, we recall the definition of topological tpes for a fied point,. Definition.1. Let E, be a fied point of the sstem 1.8 with multipliers λ 1 and λ. i A fied point E, is called sink if λ 1 < 1 and λ < 1, so sink is locall asmptoticall stable. ii A fied point E, is called source if λ 1 > 1 and λ > 1, so source is locall asmptoticall unstable. iii A fied point E, is called saddle if λ 1 < 1 and λ > 1or λ 1 > 1 and λ < 1. iv A fied point E, is called to be non-hperbolic if either λ 1 = 1 or λ = 1. Now, we discuss the local dnamics for the fied points of the sstem 1.8. The result for the stabilit of the fied point E, is as follows. Theorem.1. The fied point E, of the sstem 1.8 is a saddle. Proof. The Jacobian matri J of the sstem 1.8 at E is given b 1 JE = pr..7 ep r Obviousl, the eigenvalues of.7 are λ 1 = and λ = ep pr r with λ 1 < 1 and λ > 1 because of > pr. Thus E is a saddle. In the following we deduce the local dnamics of the fied point E +,. Theorem.. The sstem 1.8 has a uniue positive fied point E +,, where = = pr p 1/m. i When < mp 1, E + is a sink. ii When mp > 1, there eist three different topological tpes of E + for all permissible values of parameters: Proof. ii.1 E + is a sink if < mp r mp 1 = ; ii. E + is a source if > ; ii. E + is non-hperbolic if =. The Jacobian matri J of the sstem 1.8 at E + is given b 1 JE + = mp pr..8 1 The corresponding characteristic euation of.8 can be written as F λ = λ λ + mp pr =..9
6 44 C. Wang & X. Y. Li It is eas to verif that and F 1 = F 1 = + mp pr mp pr >.1 >..11 When < mp 1, mp pr < 1. B using Lemma.1 i.1, E..9 has two eigenvalues λ 1 and λ with λ 1 < 1 and λ < 1, so E + is a sink. When mp > 1, < >, = is euivalent to mp pr < >, = 1. B Lemma.1 and Ddfinition.1, it is eas to see E + is a sink for <, a source for > and non-hperbolic for =. Remark.. Theorem. shows that there eists a D locall stable manifold Wloc s in E + for < whereas a D locall unstable manifold Wloc u for >. Hence, one can see that there will be an occurrence of bifurcation at E + for =.. Neimark-Sacker bifurcation From Theorem. ii., it is eas to see that two eigenvalues of the fied point E + pr p 1/m, pr p 1/m are 1± i. Notice at this time that all the parameters locate in the following set: S E+ = {p,, r, m, + : m {1,,...}, > pr, mp > 1, = = mp r mp 1 }. The fied point E +, can pass through a Neimark-Sacker bifurcation when the parameters p,, r, m S E+ and varies in the small neighborhood of. Based on the previous analsis, we choose the parameter as a bifurcation parameter to stud the Neimark-Sacker bifurcation for the uniue positive fied point E +, of the sstem 1.8 b using the Center Manifold Theorem and bifurcation theor in [, 9, 15, 5, 9] in this section. We consider the sstem 1.8 with parameters p,, r, m S E+, which is described b, ep p + r + m..1 The first step. Giving a perturbation of parameter, we consider a perturbation of the sstem.1 as follows:, ep p + +. r + m, where 1. The second step. Let u = and v =, which transforms the fied point E +, to the origin O, and sstem. into u v, +. v v + ep p + r + u + m.
7 Stabilit and Neimark-Sacker bifurcation 45 The characteristic euation associated with the linerization of the sstem. at u, v =, is given b λ a λ + b =,.4 where a = ep p + + r + m, and b = ep p m m r + m r + m. Correspondingl, when varies in a small neighborhood of =, the roots of the characteristic euation are Hence and λ 1, = 1 d λ 1, d = [ a ± i ] 4b a..5 λ 1, = b 1/.6 = mm m + + r >..7 r + m m m 1/ In addition, it is reuired that λ i 1, 1, i = 1,,, 4 when =. Since a = = 1 and b = = 1, we have λ 1, = 1 1 ± i = e ±i π, which obviousl satisf λ 1, m 1, m = 1,,, 4..8 The third step. Stud the normal form of the sstem. when =. Epanding the sstem. as Talor series at u, v =, to the third order, we obtain where u a 1 u + a 1 v + a u + a 11 uv + a v + a u + a 1 u v + a 1 uv + a v + O u + v 4, v b 1 u + b 1 v + b u + b 11 uv + b v + b u + b 1 u v + b 1 uv + b v + O u + v 4, a 1 =, a 1 = 1, a =, a 11 =, a =,, a =, a 1 =, a 1 = a =, b 1 = 1, b 1 = 1, b 1 =, b =, b = m m 1 r + m + m m 1 r + m 4 m m 1 m 1 r + m, b 11 = m m 1 r + m, b 1 = m m r + m + m m r + m 4 m m 1 m r + m, b =, b = m m 1 m 6m m r + m 4 6m m r + m 5 m m r + m 6 m m 1m m r + m + 6m m 1 m r + m..9
8 46 C. Wang & X. Y. Li Let JE + = a1 a 1 1, namel, JE b 1 b + = B some computations we obtain the eigenvalues of the matri JE + are λ 1 = 1 + i and λ = 1 i. The fourth step. Find the normal form of.. Let matri T = 1 1, then T 1 1 =. 1 Using transformation u, v T = T X, Y T, the sstem.9 is transformed into the following form X 1 X Y + F X, Y + O X + Y 4, Y X + 1 Y + GX, Y + O X + Y 4, where F X, Y = and..1 b + 1 b 11 Y + b 11 XY + b 1 XY + b + 1 b 1 Y GX, Y =. The fifth step. Compute some coefficients. On the center manifold the sstem.9 has the above norm form.1. For convenience, for a function F 1,,..., n, denote F i, F i j, and F i j k as the first order, the second order and the third order partial derivative of F 1,,..., n, respectivel. Then, F XX, =, F XY, = b 11, F Y Y, = 4 b + b 11, F XXX, =, F XXY, =, F XY Y, = b 1, F Y Y Y, = 1 b + 6 b 1, G XX, =, G XY, =, G Y Y, =, G XXX, =, G XXY, =, G XY Y, =, G Y Y Y, =. The sith step. Compute the discriminating uantit a, which determines the stabilit of the invariant circle bifurcated from Nemark-Sacker bifurcation of the sstem.1 and can be computed via the formulae see [5] [1 a λλ ] = Re L 11 L 1 1 λ L 11 L + ReλL 1,.11
9 Stabilit and Neimark-Sacker bifurcation 47 where L = 1 8 [F XX F Y Y + G XY + ig XX G Y Y F XY ], L 11 = 1 4 [F XX + F Y Y + ig XX + G Y Y ], L = 1 8 [F XX F Y Y G XY + ig XX G Y Y + F XY ], L 1 = 1 16 [F XXX + F XY Y + G XXY + G Y Y Y + ig XXX + G XY Y F XXY F Y Y Y ]..1 Some computations produce [ 4 b + b 11 L = 1 8 L = 1 8 Hence, [ ] + ib 11, L 11 = 1 4 b + b b + b 11 + ib 11 ], L 1 = 1 16 a = 1 8 b 11b b 1 b, [ 1 b 1 i b + 6 ] b 1..1 = 16m m r + m m m 8m 7m m r + m 4 m 9m 8 m r + m + m m 1m m r + m. Clearl,.7 and.8 demonstrate that the transversal condition and the nondegenerate condition of the sstem 1.8 are satisfied. So, summarizing the above discussions, we obtain the following conclusion. Theorem.1. If a, then the sstem 1.8 undergoes a Neimark-Sacker bifurcation at the fied point E +, when the parameter varies in the small neighborhood of origin. Moreover, if a < resp., a >, then an attracting resp., repelling invariant closed curve bifurcates from the fied point for > resp., <. Two eamples, which illustrate the above Theorem.1, are given below. Eample.1. Consider the sstem 1.8 with r =.19, m =, p = 1, = =. Then, there is a uniue positive fied point E +.1,.1 with the multipliers λ = 1 + i and λ = 1 i, λ = 1, d λ 1, d = 5.5 >, and a = <. = Hence, according to Theorem.1, an attracting invariant closed curve bifurcates from the fied point for >. Eample.. Consider the sstem 1.8 with r = 9, m = 1, p = 1, = = 1. The uniue positive fied point is E + 1, 1 for the sstem 1.8, whose multipliers are λ = 1 + i and λ = 1 i with λ = 1, d λ 1, d =.11 > and =
10 48 C. Wang & X. Y. Li a =.5 >. Hence, Theorem.1 tells us that an repelling invariant closed curve bifurcates from the fied point for <. 4. Numerical simulation In this section, b using numeral simulation, we give the bifurcation diagrams, phase portraits and Lapunov eponents of the sstem 1.8 to confirm the previous theoretical analsis and show some new interesting comple dnamical behaviors eisting in the sstem 1.8. Without lose generalit, the bifurcation parameters are considered in the following two cases: Case 1. Fi the parameters p =.1, r = 1, m =, the initial value, =.1,.1 and assume that varies in the interval [1.8,.8]. Evidentl, < mp < 1. We see that the sstem 1.8 has the uniue positive 1 fied point E +.1, Theorem.1 i in Section Figures 1, and show the correctness of the a The dnamic behavior of b The dnamic behavior of Figure 1. The dnamic behavior for the sstem 1.8 which eist for p =.1, r = 1, m = and [1.8,.8]. 1 From Figure 1 we see that the fied point E + stable..1, 1.1 is asmptoticall 1.1, 1.1, the Taking = 1.8,.,. and.8 and submitting it into E + positive fied point is.884,.884,.16,.16,.4641,.4641 and 4.46, 4.46, respectivel. The phase portraits corresponding to Figure 1 are plotted in Figure which show that the fied point is asmptoticall stable. The maimum Lapunov eponents corresponding to Figure 1 and are computed and plotted in Figure in which we can easil see that the maimal Lapunov eponents are negative for the parameter [1.8,.8], that is to sa, the fied point E + 1.1, 1.1 is stable.
11 Stabilit and Neimark-Sacker bifurcation a = b = c = d =.8 Figure. Phase portrait of the sstem 1.8 versus. Maimal Lapunov eponents..4.6 Ma.Lap Figure. Maimal Lapunov eponent versus corresponding to Figure 1 and. Case. Choose the parameters p = 1, r =.19, m =, the initial values, =.1,.1 and assume that varies in the interval [1.9, 4.8]. 1 We see that mp > 1 and the uniue positive fied point is E +.1, 1.1. After calculation for the positive fied point of the sstem 1.8, we find that the Neimark-Sacker bifurcation emerges from the fied point.1,.1 at =, whose multipliers are λ 1, = 1±i with λ 1, = 1.
12 4 C. Wang & X. Y. Li a [1.9,.] b [.,.8] c [.8,.] d [.,.6] e [.6, 4.] f [4., 4.4] g [4.4, 4.8] h 4.8, 5.] Figure 4. Bifurcation diagrams of component for the sstem 1.8 versus.
13 Stabilit and Neimark-Sacker bifurcation 41 a [1.8,.] b [.,.8] c [.8,.] d [.,.6] e [.6, 4.] f [4., 4.4] g [4.4, 4.8] h 4.8, 5.] Figure 5. Bifurcation diagrams of component for the sstem 1.8 versus.
14 4 C. Wang & X. Y. Li In Figures 4 and 5, the bifurcation diagrams for the sstem 1.8 are plotted as a function of the control parameter for From Figures 4a and 5a, it is clear that the fied point is stable for <, and loses its stabilit at the Neimark-Sacker bifurcation parameter value =. An attracting invariant circle appears when the parameter eceeds. This shows the correctness of the Theorem.1. Figures 4 and 5 also displa the new and interesting dnamics as increases. The maimum Lapunov eponents corresponding to Figures 4 and 5 are computed and plotted in Figure 6, in which we can easil see that the maimal Lapunov eponents are negative for the parameter 1.9,., that is to sa that fied point is stable for <. For., 5., some Lapunov eponents are positive and some are negative, so there eist stable fied point or stable period windows in the chaotic region. In general, when the maimal Lapunov eponent is positive, this can be considered to be one of the characteristics for the eistence of chaos.. Maimal Lapunov eponents.4 Maimal Lapunov eponents Ma.Lap.. Ma.Lap a [1.8,.8] b [.8, 5.] Figure 6. Maimal Lapunov eponent versus corresponding to Figure 4 and 5. The phase portraits are considered in the following: An attractive fied point takes place for = 1.98, which means that the sstem orbit is a fied point, as shown in Figure 7a. Figure 7b shows that fied point E + is a stable attractor at = For this parameter value, the fied point E + occurs with =.995, =.995 and the associated comple conjugate eigenvalues are λ 1, =.5 ±.865i with λ 1, =.995, which means that the fied point E + is asmptoticall stable. Figure 7c demonstrates the behavior of the sstem 1.8 before the Neimark- Sacker bifurcation when = while Figure 7d demonstrates the behavior of the sstem 1.8 after the Neimark-Sacker bifurcation when =.1. From Figure 7c and Figure 7d, we deduce that the fied point E + loses its stabilit through a Neimark-Sacker bifurcation when the parameter varies from to.1.
15 Stabilit and Neimark-Sacker bifurcation a = b = c = d = e = f = g = h = i = j = k = l =.85 Figure 7. Phase portraits for the sstem 1.8 versus. Increasing the control parameter =., the sstem 1.8 has the fied point E +.195,.195, whose associated eigenvalues are λ 1, =.5 ± i.9686 with λ 1, = 1.9. So, one can conclude that the fied point becomes unstable and invariant closed curve is created around the fied point. Figure 7e and 7f confirms the above argument. Continuing to increase the value of, we observe that the dnamics of the fied point E + becomes comple from Figure 7g-l. There eist chaotic sets. 5. Conclusion In this paper, a semi-discrete model is derived for a nonlinear simple population model and its stabilit and bifurcation have been investigated. Our results displa that a Neimark-Sacker bifurcation phenomenon occurs in the positive fied point
16 44 C. Wang & X. Y. Li of this sstem under certain parametric conditions. Some other basic dnamical properties of the sstem 1.8 have been analzed b means of bifurcation diagrams, phase portraits, Lapunov eponents. Numerical simulations show that the sstem has more comple dnamical behaviors than its corresponding continuous case. References [1] R.P. Agarwal, Difference Euations and Ineualities: Theor, Methods and Applications, Marcel Dekker, NewYork,. [] H.N. Agiza, E.M. ELabbas, H. EL-Metwall and A.A. Elsadan, Chaotic dnamics of a discrete pre-predator model with Holling tpe II, Nonlinear Anal. RWA, 19, [] J. Carr, Application of Center Manifold Theorem, Springer-Verlag, New York, [4] B.S. Chen and J.J. Chen, Bifurcation and chaotic behavior of a discrete singular biological economic sstem, Appl. Math. Comput., 191, [5] H.A. El-Morshed, Global attractivit in a population model with nonlinear death rate and distributed delas, J. Math. Anal. Appl., 4114, [6] E.M. Elabbas, A.A. Elsadan and Y. Zhang, Bifurcation analsis and chaos in a discrete reduced Lorenz sstem, Appl. Math. Comput., 814, [7] D.J. Fan and J.J. Wei, Bifurcation analsis of discrete survival red blood cells model, Commun. Nonlinear Sci. Numer. Simulat., 149, [8] R.K. Ghaziani, W. Govaerts and C. Sonckb, Resonance and bifurcation in a discrete-time predator-pre sstem with Holling functional response, Nonlinear Anal. RWA, 11, [9] J. Guckenheimer and P. Holmes, Nonlinear Oscillations, Dnamical Sstems, and Bifurcations of Vector Fields, Springer-Verlag, New York, 198. [1] Z.M. He and X. Lai, Bifurcation and chaotic behavior of a discrete-time predatorcpre sstem, Nonlinear Anal. RWA, 111, [11] Z.Y. Hu, Z.D. Teng and H.J. Jiang, Stabilit analsis in a class of discrete SIRS epidemic models, Nonlinear Anal. RWA,11, 17-. [1] Z.Y. Hu, Z.D. Teng and L. Zhang, Stabilit and bifurcation analsis in a discrete SIR epidemic model, Math. Comput. Simul., 9714, 8-9. [1] Z.Y. Hu, Z.D. Teng and L. Zhang, Stabilit and bifurcation analsis of a discrete predator-pre model with nonmonotonic functional response, Nonlinear Anal. RWA, 111, [14] D. Jana, Chaotic dnamics of a discrete predator-pre sstem with pre refuge, Appl. Math. Comput., 41, [15] Y.A. Kuzenetsov, Elements of Applied Bifurcation Theor, nd Ed., Springer- Verlag, New York, [16] I. Kubiaczk and S.H. Saker, Oscillation and stabilit in nonlinear dela d- ifferential euations of population dnamics, Appl. Math. Model., 5, [17] Y.G. Li, Dnamics of a discrete food-limited population model with time dela, Appl. Math. Comput., 181,
17 Stabilit and Neimark-Sacker bifurcation 45 [18] E. Liz, A sharp global stabilit result for a discrete population model, J. Math. Anal. Appl., 7, [19] W.T. Li, Global stabilit and oscillation in nonlinear difference euations of population dnamics, Appl. Math. Comput., 1574, [] J.Q. Li, X.C. Song and F.Y. Gao, Global stabilit of a virus infection model with two delas and two tpes of target cells, J. Appl. Anal. Comput., 1, [1] X.L. Liu and D.M. Xiao, Comple dnamic behaviors of a discrete-time predator-pre sstem, Chaos, Solit. Fract., 7, [] J.D. Murr, Mathematical Biolog, Springer, NewYork, [] V.G. Nazarenko, Influence of dela on auto-oscillation in cell populations, Biofisika 11976, [4] N. Namoradi and M. Javidi, Qualitative and bifurcation analsis using a computer virus model with a saturated recover function, J. Appl. Anal. Comput., 1, 5-1. [5] C. Robinson, Dnamical Sstems: Stabilit, Smbolic Dnamics, and Chaos, nd Ed., Boca Raton, London, New York, [6] S.H. Saker, Periodic solutions, oscillation and attractivit of discrete nonlinear dela population model, Math. Comput. Model., 478, [7] S.H. Saker and J.O. Alzabutb, Eistence of periodic solutions, global attractivit and oscillation of impulsive dela population model, Nonlinear Anal. RWA, 87, 19C19. [8] Y.L. Song and Y.H. Peng, Periodic solutions of a nonautonomous periodic model of population with continuous and discrete time, J. Comput. Appl. Math., 1886, [9] S. Winggins, Introduction to Applied Nonlinear Dnamical Sstems and Chaos, Springer-Verlag, New York,. [] X. Wu and C.R. Zhang, Dnamic properties of the Oregonator model with dela, J. Appl. Anal. Comput., 11, [1] Z.Y. Yang, T. Jiang and Z.J. Jing, Bifurcations of periodic solutions and chaos in Duffinng-van der Pol euation with one eternal forcing, J. Appl. Anal. Comput., 41, [] N. Yi, P. Liu and Q.L. Zhang, Bifurcations analsis and tracking control of an epidemic model with nonlinear incidence rate, Appl. Math. Model., 61, [] J.R. Yan, A.M. Zhao and Q.X. Zhang, Oscillation properties of nonlinear impulsive dela differential euations and applications to population models, J. Math. Anal. Appl., 6, 59C7. [4] R.Y. Zhang, Z.C. Wang, Y. Chen and J. Wu, Periodic solutions of a single species discrete population model with periodic havest/stock, Comput. Math. Appl., 9, [5] X. Zhang, Q.L. Zhang and V. Sreeram, Bifurcation analsis and control of a discrete harvested pre-predator sstem with Beddington-DeAngelis functional response, J. Frank. Insti., 471,
A PREY-PREDATOR MODEL WITH HOLLING II FUNCTIONAL RESPONSE AND THE CARRYING CAPACITY OF PREDATOR DEPENDING ON ITS PREY
Journal of Applied Analsis and Computation Volume 8, Number 5, October 218, 1464 1474 Website:http://jaac-online.com/ DOI:1.11948/218.1464 A PREY-PREDATOR MODEL WITH HOLLING II FUNCTIONAL RESPONSE AND
More information10 Back to planar nonlinear systems
10 Back to planar nonlinear sstems 10.1 Near the equilibria Recall that I started talking about the Lotka Volterra model as a motivation to stud sstems of two first order autonomous equations of the form
More informationUsing MatContM in the study of a nonlinear map in economics
Journal of Phsics: Conference Series PAPER OPEN ACCESS Using MatContM in the stud of a nonlinear map in economics To cite this article: Niels Neirnck et al 016 J. Phs.: Conf. Ser. 69 0101 Related content
More informationResearch Article Chaotic Attractor Generation via a Simple Linear Time-Varying System
Discrete Dnamics in Nature and Societ Volume, Article ID 836, 8 pages doi:.//836 Research Article Chaotic Attractor Generation via a Simple Linear Time-Varing Sstem Baiu Ou and Desheng Liu Department of
More informationResearch Article Chaos and Control of Game Model Based on Heterogeneous Expectations in Electric Power Triopoly
Discrete Dnamics in Nature and Societ Volume 29, Article ID 469564, 8 pages doi:.55/29/469564 Research Article Chaos and Control of Game Model Based on Heterogeneous Epectations in Electric Power Triopol
More informationMULTI-SCROLL CHAOTIC AND HYPERCHAOTIC ATTRACTORS GENERATED FROM CHEN SYSTEM
International Journal of Bifurcation and Chaos, Vol. 22, No. 2 (212) 133 ( pages) c World Scientific Publishing Compan DOI: 1.1142/S21812741332 MULTI-SCROLL CHAOTIC AND HYPERCHAOTIC ATTRACTORS GENERATED
More informationBifurcation Analysis of Prey-Predator Model with Harvested Predator
International Journal of Engineering Research and Development e-issn: 78-67X, p-issn: 78-8X, www.ijerd.com Volume, Issue 6 (June 4), PP.4-5 Bifurcation Analysis of Prey-Predator Model with Harvested Predator
More informationHopf Bifurcation and Control of Lorenz 84 System
ISSN 79-3889 print), 79-3897 online) International Journal of Nonlinear Science Vol.63) No.,pp.5-3 Hopf Bifurcation and Control of Loren 8 Sstem Xuedi Wang, Kaihua Shi, Yang Zhou Nonlinear Scientific Research
More informationNew approach to study the van der Pol equation for large damping
Electronic Journal of Qualitative Theor of Differential Equations 2018, No. 8, 1 10; https://doi.org/10.1422/ejqtde.2018.1.8 www.math.u-szeged.hu/ejqtde/ New approach to stud the van der Pol equation for
More information* τσ σκ. Supporting Text. A. Stability Analysis of System 2
Supporting Tet A. Stabilit Analsis of Sstem In this Appendi, we stud the stabilit of the equilibria of sstem. If we redefine the sstem as, T when -, then there are at most three equilibria: E,, E κ -,,
More informationFractal dimension of the controlled Julia sets of the output duopoly competing evolution model
Available online at www.isr-publications.com/jmcs J. Math. Computer Sci. 1 (1) 1 71 Research Article Fractal dimension of the controlled Julia sets of the output duopol competing evolution model Zhaoqing
More informationARTICLE IN PRESS. Nonlinear Analysis: Real World Applications. Contents lists available at ScienceDirect
Nonlinear Analsis: Real World Applications ( Contents lists available at ScienceDirect Nonlinear Analsis: Real World Applications journal homepage: www.elsevier.com/locate/nonrwa Qualitative analsis of
More informationDynamics of Modified Leslie-Gower Predator-Prey Model with Predator Harvesting
International Journal of Basic & Applied Sciences IJBAS-IJENS Vol:13 No:05 55 Dynamics of Modified Leslie-Gower Predator-Prey Model with Predator Harvesting K. Saleh Department of Mathematics, King Fahd
More informationChapter 8 Equilibria in Nonlinear Systems
Chapter 8 Equilibria in Nonlinear Sstems Recall linearization for Nonlinear dnamical sstems in R n : X 0 = F (X) : if X 0 is an equilibrium, i.e., F (X 0 ) = 0; then its linearization is U 0 = AU; A =
More informationBifurcation Analysis, Chaos and Control in the Burgers Mapping
ISSN 1749-3889 print, 1749-3897 online International Journal of Nonlinear Science Vol.4007 No.3,pp.171-185 Bifurcation Analysis, Chaos and Control in the Burgers Mapping E. M. ELabbasy, H. N. Agiza, H.
More information520 Chapter 9. Nonlinear Differential Equations and Stability. dt =
5 Chapter 9. Nonlinear Differential Equations and Stabilit dt L dθ. g cos θ cos α Wh was the negative square root chosen in the last equation? (b) If T is the natural period of oscillation, derive the
More informationResearch Article A New Four-Scroll Chaotic Attractor Consisted of Two-Scroll Transient Chaotic and Two-Scroll Ultimate Chaotic
Mathematical Problems in Engineering Volume, Article ID 88, pages doi:.//88 Research Article A New Four-Scroll Chaotic Attractor Consisted of Two-Scroll Transient Chaotic and Two-Scroll Ultimate Chaotic
More informationChaos Control and Synchronization of a Fractional-order Autonomous System
Chaos Control and Snchronization of a Fractional-order Autonomous Sstem WANG HONGWU Tianjin Universit, School of Management Weijin Street 9, 37 Tianjin Tianjin Universit of Science and Technolog College
More informationThe Hopf Bifurcation Theorem: Abstract. Introduction. Transversality condition; the eigenvalues cross the imginary axis with non-zero speed
Supercritical and Subcritical Hopf Bifurcations in Non Linear Maps Tarini Kumar Dutta, Department of Mathematics, Gauhati Universit Pramila Kumari Prajapati, Department of Mathematics, Gauhati Universit
More informationComplex dynamic behaviors of a discrete-time predator prey system
Chaos, Solitons and Fractals 3 (7) 8 94 www.elsevier.com/locate/chaos Comple dnamic behaviors of a discrete-time predator pre sstem Xiaoli Liu *, Dongmei Xiao Department of Mathematics, Shanghai Jiao Tong
More information7.7 LOTKA-VOLTERRA M ODELS
77 LOTKA-VOLTERRA M ODELS sstems, such as the undamped pendulum, enabled us to draw the phase plane for this sstem and view it globall In that case we were able to understand the motions for all initial
More informationControl Schemes to Reduce Risk of Extinction in the Lotka-Volterra Predator-Prey Model
Journal of Applied Mathematics and Phsics, 2014, 2, 644-652 Published Online June 2014 in SciRes. http://www.scirp.org/journal/jamp http://d.doi.org/10.4236/jamp.2014.27071 Control Schemes to Reduce Risk
More informationComplex Dynamics Behaviors of a Discrete Prey-Predator Model with Beddington-DeAngelis Functional Response
Int. J. Contemp. Math. Sciences, Vol. 7, 2012, no. 45, 2179-2195 Complex Dynamics Behaviors of a Discrete Prey-Predator Model with Beddington-DeAngelis Functional Response K. A. Hasan University of Sulaimani,
More informationEXISTENCE OF POSITIVE PERIODIC SOLUTIONS OF DISCRETE MODEL FOR THE INTERACTION OF DEMAND AND SUPPLY. S. H. Saker
Nonlinear Funct. Anal. & Appl. Vol. 10 No. 005 pp. 311 34 EXISTENCE OF POSITIVE PERIODIC SOLUTIONS OF DISCRETE MODEL FOR THE INTERACTION OF DEMAND AND SUPPLY S. H. Saker Abstract. In this paper we derive
More information4452 Mathematical Modeling Lecture 13: Chaos and Fractals
Math Modeling Lecture 13: Chaos and Fractals Page 1 442 Mathematical Modeling Lecture 13: Chaos and Fractals Introduction In our tetbook, the discussion on chaos and fractals covers less than 2 pages.
More informationNONLINEAR DYNAMICS AND CHAOS. Numerical integration. Stability analysis
LECTURE 3: FLOWS NONLINEAR DYNAMICS AND CHAOS Patrick E McSharr Sstems Analsis, Modelling & Prediction Group www.eng.o.ac.uk/samp patrick@mcsharr.net Tel: +44 83 74 Numerical integration Stabilit analsis
More informationLocal Phase Portrait of Nonlinear Systems Near Equilibria
Local Phase Portrait of Nonlinear Sstems Near Equilibria [1] Consider 1 = 6 1 1 3 1, = 3 1. ( ) (a) Find all equilibrium solutions of the sstem ( ). (b) For each equilibrium point, give the linear approimating
More informationBroken symmetry in modified Lorenz model
Int. J. Dnamical Sstems and Differential Equations, Vol., No., 1 Broken smmetr in modified Lorenz model Ilham Djellit*, Brahim Kilani Department of Mathematics, Universit Badji Mokhtar, Laborator of Mathematics,
More informationJournal of Inequalities in Pure and Applied Mathematics
Journal of Inequalities in Pure and Applied Mathematics http://jipam.vu.edu.au/ Volume 2, Issue 2, Article 15, 21 ON SOME FUNDAMENTAL INTEGRAL INEQUALITIES AND THEIR DISCRETE ANALOGUES B.G. PACHPATTE DEPARTMENT
More informationCOMPLEX DYNAMICS AND CHAOS CONTROL IN DUFFING-VAN DER POL EQUATION WITH TWO EXTERNAL PERIODIC FORCING TERMS
International J. of Math. Sci. & Engg. Appls. (IJMSEA) ISSN 0973-9424, Vol. 9 No. III (September, 2015), pp. 197-210 COMPLEX DYNAMICS AND CHAOS CONTROL IN DUFFING-VAN DER POL EQUATION WITH TWO EXTERNAL
More informationStability Analysis for Linear Systems under State Constraints
Stabilit Analsis for Linear Sstems under State Constraints Haijun Fang Abstract This paper revisits the problem of stabilit analsis for linear sstems under state constraints New and less conservative sufficient
More informationBifurcation and Stability Analysis in Dynamics of Prey-Predator Model with Holling Type IV Functional Response and Intra-Specific Competition
Research Inventy: International Journal Of Engineering And Science Vol.4, Issue (January 4), PP 5-6 Issn(e): 78-47, Issn(p):39-6483, www.researchinventy.com Bifurcation and Stability Analysis in Dynamics
More informationThe Invariant Curve in a Planar System of Difference Equations
Advances in Dynamical Systems and Applications ISSN 0973-5321, Volume 13, Number 1, pp. 59 71 2018 http://campus.mst.edu/adsa The Invariant Curve in a Planar System of Difference Equations Senada Kalabušić,
More informationSTABILITY AND BIFURCATION ANALYSIS IN A DISCRETE-TIME PREDATOR-PREY DYNAMICS MODEL WITH FRACTIONAL ORDER
TWMS J. Pure Appl. Math. V.8 N.1 2017 pp.83-96 STABILITY AND BIFURCATION ANALYSIS IN A DISCRETE-TIME PREDATOR-PREY DYNAMICS MODEL WITH FRACTIONAL ORDER MOUSTAFA EL-SHAHED 1 A.M. AHMED 2 IBRAHIM M. E. ABDELSTAR
More informationInterspecific Segregation and Phase Transition in a Lattice Ecosystem with Intraspecific Competition
Interspecific Segregation and Phase Transition in a Lattice Ecosstem with Intraspecific Competition K. Tainaka a, M. Kushida a, Y. Ito a and J. Yoshimura a,b,c a Department of Sstems Engineering, Shizuoka
More informationDifference Resonances in a controlled van der Pol-Duffing oscillator involving time. delay
Difference Resonances in a controlled van der Pol-Duffing oscillator involving time delay This paper was published in the journal Chaos, Solitions & Fractals, vol.4, no., pp.975-98, Oct 9 J.C. Ji, N. Zhang,
More informationDynamical Systems. 1.0 Ordinary Differential Equations. 2.0 Dynamical Systems
. Ordinary Differential Equations. An ordinary differential equation (ODE, for short) is an equation involves a dependent variable and its derivatives with respect to an independent variable. When we speak
More informationPERIODICALLY FORCED CHAOTIC SYSTEM WITH SIGNUM NONLINEARITY
International Journal of Bifurcation and Chaos, Vol., No. 5 () 499 57 c World Scientific Publishing Compan DOI:.4/S874664 PERIODICALLY FORCED CHAOTIC SYSTEM WITH SIGNUM NONLINEARITY KEHUI SUN,, and J.
More informationMULTIPLE MIXED-TYPE ATTRACTORS IN A COMPETITION MODEL. 1. Introduction
MULTIPLE MIXED-TYPE ATTRACTORS IN A COMPETITION MODEL J. M. CUSHING, SHANDELLE M. HENSON, AND CHANTEL C. BLACKBURN Abstract. We show that a discrete time, two species competition model with Ricker (eponential)
More informationFrom bell-shaped solitary wave to W/M-shaped solitary wave solutions in an integrable nonlinear wave equation
PRAMANA c Indian Academ of Sciences Vol. 74, No. journal of Januar 00 phsics pp. 9 6 From bell-shaped solitar wave to W/M-shaped solitar wave solutions in an integrable nonlinear wave equation AIYONG CHEN,,,
More informationBACKWARD FOKKER-PLANCK EQUATION FOR DETERMINATION OF MODEL PREDICTABILITY WITH UNCERTAIN INITIAL ERRORS
BACKWARD FOKKER-PLANCK EQUATION FOR DETERMINATION OF MODEL PREDICTABILITY WITH UNCERTAIN INITIAL ERRORS. INTRODUCTION It is widel recognized that uncertaint in atmospheric and oceanic models can be traced
More informationTHE CENTER-FOCUS PROBLEM AND BIFURCATION OF LIMIT CYCLES IN A CLASS OF 7TH-DEGREE POLYNOMIAL SYSTEMS
Journal of Applied Analysis and Computation Volume 6, Number 3, August 016, 17 6 Website:http://jaac-online.com/ DOI:10.1194/01605 THE CENTER-FOCUS PROBLEM AND BIFURCATION OF LIMIT CYCLES IN A CLASS OF
More informationOn the periodic logistic equation
On the periodic logistic equation Ziyad AlSharawi a,1 and James Angelos a, a Central Michigan University, Mount Pleasant, MI 48858 Abstract We show that the p-periodic logistic equation x n+1 = µ n mod
More informationREVIEW ARTICLE. ZeraouliaELHADJ,J.C.SPROTT
Front. Phs. China, 2009, 4(1: 111 121 DOI 10.1007/s11467-009-0005- REVIEW ARTICLE ZeraouliaELHADJ,J.C.SPROTT Classification of three-dimensional quadratic diffeomorphisms with constant Jacobian c Higher
More informationDynamics in Delay Cournot Duopoly
Dnamics in Dela Cournot Duopol Akio Matsumoto Chuo Universit Ferenc Szidarovszk Universit of Arizona Hirouki Yoshida Nihon Universit Abstract Dnamic linear oligopolies are eamined with continuous time
More informationPiecewise Smooth Solutions to the Burgers-Hilbert Equation
Piecewise Smooth Solutions to the Burgers-Hilbert Equation Alberto Bressan and Tianyou Zhang Department of Mathematics, Penn State University, University Park, Pa 68, USA e-mails: bressan@mathpsuedu, zhang
More informationCONTROLLING IN BETWEEN THE LORENZ AND THE CHEN SYSTEMS
International Journal of Bifurcation and Chaos, Vol. 12, No. 6 (22) 1417 1422 c World Scientific Publishing Company CONTROLLING IN BETWEEN THE LORENZ AND THE CHEN SYSTEMS JINHU LÜ Institute of Systems
More informationA new chaotic attractor from general Lorenz system family and its electronic experimental implementation
Turk J Elec Eng & Comp Sci, Vol.18, No.2, 2010, c TÜBİTAK doi:10.3906/elk-0906-67 A new chaotic attractor from general Loren sstem famil and its electronic eperimental implementation İhsan PEHLİVAN, Yılma
More informationNonlinear Systems Examples Sheet: Solutions
Nonlinear Sstems Eamples Sheet: Solutions Mark Cannon, Michaelmas Term 7 Equilibrium points. (a). Solving ẋ =sin 4 3 =for gives =as an equilibrium point. This is the onl equilibrium because there is onl
More information(4p) See Theorem on pages in the course book. 3. Consider the following system of ODE: z 2. n j 1
MATEMATIK Datum -8- Tid eftermiddag GU, Chalmers Hjälpmedel inga A.Heintz Telefonvakt Aleei Heintz Tel. 76-786. Tenta i ODE och matematisk modellering, MMG, MVE6 Answer rst those questions that look simpler,
More informationGlobal Analysis of an Epidemic Model with Nonmonotone Incidence Rate
Global Analysis of an Epidemic Model with Nonmonotone Incidence Rate Dongmei Xiao Department of Mathematics, Shanghai Jiaotong University, Shanghai 00030, China E-mail: xiaodm@sjtu.edu.cn and Shigui Ruan
More informationFlows and Connectivity
Chapter 4 Flows and Connectivit 4. Network Flows Capacit Networks A network N is a connected weighted loopless graph (G,w) with two specified vertices and, called the source and the sink, respectivel,
More informationAmplitude-phase control of a novel chaotic attractor
Turkish Journal of Electrical Engineering & Computer Sciences http:// journals. tubitak. gov. tr/ elektrik/ Research Article Turk J Elec Eng & Comp Sci (216) 24: 1 11 c TÜBİTAK doi:1.396/elk-131-55 Amplitude-phase
More informationHopf Bifurcation and Limit Cycle Analysis of the Rikitake System
ISSN 749-3889 (print), 749-3897 (online) International Journal of Nonlinear Science Vol.4(0) No.,pp.-5 Hopf Bifurcation and Limit Cycle Analysis of the Rikitake System Xuedi Wang, Tianyu Yang, Wei Xu Nonlinear
More informationFuzzy Topology On Fuzzy Sets: Regularity and Separation Axioms
wwwaasrcorg/aasrj American Academic & Scholarl Research Journal Vol 4, No 2, March 212 Fuzz Topolog n Fuzz Sets: Regularit and Separation Aioms AKandil 1, S Saleh 2 and MM Yakout 3 1 Mathematics Department,
More informationExistence of periodic solutions in predator prey and competition dynamic systems
Nonlinear Analsis: Real World Applications 7 (2006) 1193 1204 www.elsevier.com/locate/na Eistence of periodic solutions in predator pre and competition dnamic sstems Martin Bohner a,, Meng Fan b, Jimin
More informationPICONE S IDENTITY FOR A SYSTEM OF FIRST-ORDER NONLINEAR PARTIAL DIFFERENTIAL EQUATIONS
Electronic Journal of Differential Equations, Vol. 2013 (2013), No. 143, pp. 1 7. ISSN: 1072-6691. URL: http://ejde.math.txstate.edu or http://ejde.math.unt.edu ftp ejde.math.txstate.edu PICONE S IDENTITY
More informationarxiv: v1 [math.co] 21 Dec 2016
The integrall representable trees of norm 3 Jack H. Koolen, Masood Ur Rehman, Qianqian Yang Februar 6, 08 Abstract In this paper, we determine the integrall representable trees of norm 3. arxiv:6.0697v
More informationExistence of Positive Periodic Solutions of Mutualism Systems with Several Delays 1
Advances in Dynamical Systems and Applications. ISSN 973-5321 Volume 1 Number 2 (26), pp. 29 217 c Research India Publications http://www.ripublication.com/adsa.htm Existence of Positive Periodic Solutions
More informationNew results on the existences of solutions of the Dirichlet problem with respect to the Schrödinger-prey operator and their applications
Chen Zhang Journal of Inequalities Applications 2017 2017:143 DOI 10.1186/s13660-017-1417-9 R E S E A R C H Open Access New results on the existences of solutions of the Dirichlet problem with respect
More informationAnti-synchronization of a new hyperchaotic system via small-gain theorem
Anti-synchronization of a new hyperchaotic system via small-gain theorem Xiao Jian( ) College of Mathematics and Statistics, Chongqing University, Chongqing 400044, China (Received 8 February 2010; revised
More informationTHE ROSENZWEIG-MACARTHUR PREDATOR-PREY MODEL
THE ROSENZWEIG-MACARTHUR PREDATOR-PREY MODEL HAL L. SMITH* SCHOOL OF MATHEMATICAL AND STATISTICAL SCIENCES ARIZONA STATE UNIVERSITY TEMPE, AZ, USA 8587 Abstract. This is intended as lecture notes for nd
More informationExamples and counterexamples for Markus-Yamabe and LaSalle global asymptotic stability problems Anna Cima, Armengol Gasull and Francesc Mañosas
Proceedings of the International Workshop Future Directions in Difference Equations. June 13-17, 2011, Vigo, Spain. PAGES 89 96 Examples and counterexamples for Markus-Yamabe and LaSalle global asmptotic
More informationFully Discrete Energy Stable High Order Finite Difference Methods for Hyperbolic Problems in Deforming Domains: An Initial Investigation
Full Discrete Energ Stable High Order Finite Difference Methods for Hperbolic Problems in Deforming Domains: An Initial Investigation Samira Nikkar and Jan Nordström Abstract A time-dependent coordinate
More informationDiscontinuous Galerkin method for a class of elliptic multi-scale problems
INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN FLUIDS Int. J. Numer. Meth. Fluids 000; 00: 6 [Version: 00/09/8 v.0] Discontinuous Galerkin method for a class of elliptic multi-scale problems Ling Yuan
More informationEXACT SOLITARY WAVE AND PERIODIC WAVE SOLUTIONS OF THE KAUP-KUPERSCHMIDT EQUATION
Journal of Applied Analysis and Computation Volume 5, Number 3, August 015, 485 495 Website:http://jaac-online.com/ doi:10.11948/015039 EXACT SOLITARY WAVE AND PERIODIC WAVE SOLUTIONS OF THE KAUP-KUPERSCHMIDT
More informationarxiv: v1 [nlin.ps] 3 Sep 2009
Soliton, kink and antikink solutions o a 2-component o the Degasperis-Procesi equation arxiv:0909.0659v1 [nlin.ps] 3 Sep 2009 Jiangbo Zhou, Liin Tian, Xinghua Fan Nonlinear Scientiic Research Center, Facult
More informationBifurcation Analysis of a SIRS Epidemic Model with a Generalized Nonmonotone and Saturated Incidence Rate
Bifurcation Analysis of a SIRS Epidemic Model with a Generalized Nonmonotone and Saturated Incidence Rate Min Lu a, Jicai Huang a, Shigui Ruan b and Pei Yu c a School of Mathematics and Statistics, Central
More informationJournal of Mathematical Analysis and Applications
J. Math. Anal. Appl. 394 (202) 2 28 Contents lists available at SciVerse ScienceDirect Journal of Mathematical Analsis and Applications journal homepage: www.elsevier.com/locate/jmaa Resonance of solitons
More informationApplications of Gauss-Radau and Gauss-Lobatto Numerical Integrations Over a Four Node Quadrilateral Finite Element
Avaiable online at www.banglaol.info angladesh J. Sci. Ind. Res. (), 77-86, 008 ANGLADESH JOURNAL OF SCIENTIFIC AND INDUSTRIAL RESEARCH CSIR E-mail: bsir07gmail.com Abstract Applications of Gauss-Radau
More informationFIRST- AND SECOND-ORDER IVPS The problem given in (1) is also called an nth-order initial-value problem. For example, Solve: Solve:
.2 INITIAL-VALUE PROBLEMS 3.2 INITIAL-VALUE PROBLEMS REVIEW MATERIAL Normal form of a DE Solution of a DE Famil of solutions INTRODUCTION We are often interested in problems in which we seek a solution
More informationBifurcation and Stability Analysis of a Prey-predator System with a Reserved Area
ISSN 746-733, England, UK World Journal of Modelling and Simulation Vol. 8 ( No. 4, pp. 85-9 Bifurcation and Stability Analysis of a Prey-predator System with a Reserved Area Debasis Mukherjee Department
More informationLotka Volterra Model with Time Delay
International Journal of Mathematics Research. ISSN 976-584 Volume 6, Number (4), pp. 5- International Research Publication House http://www.irphouse.com Lotka Volterra Model with Time Dela Tapas Kumar
More informationDynamical Properties of the Hénon Mapping
Int. Journal of Math. Analsis, Vol. 6, 0, no. 49, 49-430 Dnamical Properties of the Hénon Mapping Wadia Faid Hassan Al-Shameri Department of Mathematics, Facult of Applied Science Thamar Universit, Yemen
More informationHopf Bifurcation Control for Affine Systems
opf Bifurcation Control for Affine Systems Ferno Verduzco Joaquin Alvarez Abstract In this paper we establish conditions to control the opf bifurcation of nonlinear systems with two uncontrollable modes
More informationA route to computational chaos revisited: noninvertibility and the breakup of an invariant circle
A route to computational chaos revisited: noninvertibilit and the breakup of an invariant circle Christos E. Frouzakis Combustion Research Laborator, Paul Scherrer Institute CH-5232, Villigen, Switzerland
More informationAn Optimization Method for Numerically Solving Three-point BVPs of Linear Second-order ODEs with Variable Coefficients
An Optimization Method for Numericall Solving Three-point BVPs of Linear Second-order ODEs with Variable Coefficients Liaocheng Universit School of Mathematics Sciences 252059, Liaocheng P.R. CHINA hougbb@26.com;
More informationBifurcation in a Discrete Two Patch Logistic Metapopulation Model
Bifurcation in a Discrete Two Patch Logistic Metapopulation Model LI XU Tianjin University of Commerce Department of Statistics Jinba road, Benchen,Tianjin CHINA beifang xl@63.com ZHONGXIANG CHANG Tianjin
More informationBifurcation Analysis in Simple SIS Epidemic Model Involving Immigrations with Treatment
Appl. Math. Inf. Sci. Lett. 3, No. 3, 97-10 015) 97 Applied Mathematics & Information Sciences Letters An International Journal http://dx.doi.org/10.1785/amisl/03030 Bifurcation Analysis in Simple SIS
More informationDynamics of multiple pendula without gravity
Chaotic Modeling and Simulation (CMSIM) 1: 57 67, 014 Dnamics of multiple pendula without gravit Wojciech Szumiński Institute of Phsics, Universit of Zielona Góra, Poland (E-mail: uz88szuminski@gmail.com)
More informationSubband Coding and Wavelets. National Chiao Tung University Chun-Jen Tsai 12/04/2014
Subband Coding and Wavelets National Chiao Tung Universit Chun-Jen Tsai /4/4 Concept of Subband Coding In transform coding, we use N (or N N) samples as the data transform unit Transform coefficients are
More informationThe Design and Realization of a Hyper-Chaotic Circuit Based on a Flux-Controlled Memristor with Linear Memductance
See discussions, stats, and author profiles for this publication at: https://www.researchgate.net/publication/322189594 The Design and Realiation of a Hper-Chaotic Circuit Based on a Flu-Controlled Memristor
More informationTWO DIMENSIONAL FLOWS. Lecture 5: Limit Cycles and Bifurcations
TWO DIMENSIONAL FLOWS Lecture 5: Limit Cycles and Bifurcations 5. Limit cycles A limit cycle is an isolated closed trajectory [ isolated means that neighbouring trajectories are not closed] Fig. 5.1.1
More informationIntroduction to Differential Equations. National Chiao Tung University Chun-Jen Tsai 9/14/2011
Introduction to Differential Equations National Chiao Tung Universit Chun-Jen Tsai 9/14/011 Differential Equations Definition: An equation containing the derivatives of one or more dependent variables,
More informationProblem Set Number 5, j/2.036j MIT (Fall 2014)
Problem Set Number 5, 18.385j/2.036j MIT (Fall 2014) Rodolfo R. Rosales (MIT, Math. Dept.,Cambridge, MA 02139) Due Fri., October 24, 2014. October 17, 2014 1 Large µ limit for Liénard system #03 Statement:
More informationKey words and phrases. Bifurcation, Difference Equations, Fixed Points, Predator - Prey System, Stability.
ISO 9001:008 Certified Volume, Issue, March 013 Dynamical Behavior in a Discrete Prey- Predator Interactions M.ReniSagaya Raj 1, A.George Maria Selvam, R.Janagaraj 3.and D.Pushparajan 4 1,,3 Sacred Heart
More informationBIFURCATION PHENOMENA Lecture 1: Qualitative theory of planar ODEs
BIFURCATION PHENOMENA Lecture 1: Qualitative theory of planar ODEs Yuri A. Kuznetsov August, 2010 Contents 1. Solutions and orbits. 2. Equilibria. 3. Periodic orbits and limit cycles. 4. Homoclinic orbits.
More informationA Novel Three Dimension Autonomous Chaotic System with a Quadratic Exponential Nonlinear Term
ETASR - Engineering, Technology & Applied Science Research Vol., o.,, 9-5 9 A Novel Three Dimension Autonomous Chaotic System with a Quadratic Exponential Nonlinear Term Fei Yu College of Information Science
More informationBifurcations of Travelling Wave Solutions for the B(m,n) Equation
American Journal of Computational Mathematics 4 4 4-8 Published Online March 4 in SciRes. http://www.scirp.org/journal/ajcm http://dx.doi.org/.436/jasmi.4.4 Bifurcations of Travelling Wave Solutions for
More informationEE222: Solutions to Homework 2
Spring 7 EE: Solutions to Homework 1. Draw the phase portrait of a reaction-diffusion sstem ẋ 1 = ( 1 )+ 1 (1 1 ) ẋ = ( 1 )+ (1 ). List the equilibria and their tpes. Does the sstem have limit ccles? (Hint:
More informationWHAT IS A CHAOTIC ATTRACTOR?
WHAT IS A CHAOTIC ATTRACTOR? CLARK ROBINSON Abstract. Devaney gave a mathematical definition of the term chaos, which had earlier been introduced by Yorke. We discuss issues involved in choosing the properties
More informationConstant 2-labelling of a graph
Constant 2-labelling of a graph S. Gravier, and E. Vandomme June 18, 2012 Abstract We introduce the concept of constant 2-labelling of a graph and show how it can be used to obtain periodic sphere packing.
More information= F ( x; µ) (1) where x is a 2-dimensional vector, µ is a parameter, and F :
1 Bifurcations Richard Bertram Department of Mathematics and Programs in Neuroscience and Molecular Biophysics Florida State University Tallahassee, Florida 32306 A bifurcation is a qualitative change
More informationSTUDY OF THE DYNAMICAL MODEL OF HIV
STUDY OF THE DYNAMICAL MODEL OF HIV M.A. Lapshova, E.A. Shchepakina Samara National Research University, Samara, Russia Abstract. The paper is devoted to the study of the dynamical model of HIV. An application
More informationSimulation and Experimental Validation of Chaotic Behavior of Airflow in a Ventilated Room
Simulation and Eperimental Validation of Chaotic Behavior of Airflow in a Ventilated Room Jos van Schijndel, Assistant Professor Eindhoven Universit of Technolog, Netherlands KEYWORDS: Airflow, chaos,
More informationSynchronization and Bifurcation Analysis in Coupled Networks of Discrete-Time Systems
Commun. Theor. Phys. (Beijing, China) 48 (2007) pp. 871 876 c International Academic Publishers Vol. 48, No. 5, November 15, 2007 Synchronization and Bifurcation Analysis in Coupled Networks of Discrete-Time
More informationMATH 614 Dynamical Systems and Chaos Lecture 24: Bifurcation theory in higher dimensions. The Hopf bifurcation.
MATH 614 Dynamical Systems and Chaos Lecture 24: Bifurcation theory in higher dimensions. The Hopf bifurcation. Bifurcation theory The object of bifurcation theory is to study changes that maps undergo
More informationLOCAL AND GLOBAL STABILITY OF IMPULSIVE PEST MANAGEMENT MODEL WITH BIOLOGICAL HYBRID CONTROL
International J. of Math. Sci. & Engg. Appls. (IJMSEA) ISSN 0973-9424, Vol. 11 No. II (August, 2017), pp. 129-141 LOCAL AND GLOBAL STABILITY OF IMPULSIVE PEST MANAGEMENT MODEL WITH BIOLOGICAL HYBRID CONTROL
More informationA Discrete Numerical Scheme of Modified Leslie-Gower With Harvesting Model
CAUCHY Jurnal Matematika Murni dan Aplikasi Volume 5(2) (2018), Pages 42-47 p-issn: 2086-0382; e-issn: 2477-3344 A Discrete Numerical Scheme of Modified Leslie-Gower With Harvesting Model Riski Nur Istiqomah
More information4 Inverse function theorem
Tel Aviv Universit, 2013/14 Analsis-III,IV 53 4 Inverse function theorem 4a What is the problem................ 53 4b Simple observations before the theorem..... 54 4c The theorem.....................
More information