CURRICULUM VITAE Nikolaos S. Papageorgiou

Transcription

1 CURRICULUM VITAE Nikolaos S. Papageorgiou 1 Personal Data Department of Mathematics, National Technical University, Zografou Campus, Athens 15780, Greece _ Position: Professor, National Technical University, Athens, Greece. 2 Education: _ September June 1980: Undergraduate Studies at Massachusetts Institute of Technology (MIT), USA: { B.S. Electrical Engineering (June 1980); { B.S. Mathematics (June 1980). _ September June 1983: Graduate Studies (Fellowship) at Harvard University: { Ph.D Applied Mathematics (February 4, 1983) 1 3 Positions: _ September July 1986: Assistant Professor - Department of Mathematics, University of Illinois, Urbana, USA _ August July 1990: Associate Professor - Department of Mathematics, University of California at Davis, USA _ August July 1995: Professor - Department of Mathematics, Florida Institute of Technology, Melbourne, Urbana, USA. _ August Present: Professor - Department of Mathematical and Physical Sciences, National Technical Univ. of Athens (NTUA), GREECE. 4 Visiting Positions: _ April - June 1985: Department of Mathematics, University of Pavia, Italy. _ May - June 1986: Department of Mathematics, University of Toulouse III, France. _ January - March 1993: Department of Mathematics, University of Florence, Italy. _ May 1994, 1995, 1997, 1998, 1999, 2009: Department of Mathematics, University of Perugia, Italy. _ September 2000, 2002 May 2005, December 2006: Department of Mathematics, University of Ancona, Italy. _ April and September 2005: Department of Mathematics, University of Aveiro, Portugal. _ March 2006: Department of Mathematics, University of Perpignan, France. _ January to July 2007: Department of Mathematics, University of Aveiro, Portugal. _ March 2009, 2011: Department of Mathematics, University of Perpignan, France. 5 Ph. D. Students: _ D. Kandilakis - University of Illinois, May 1985 ( now Associate Professor at the Technical University of Crete, Greece); _ N. Kourogenis - NTUA, Septrmber 1999 ( now Assistant Professor at the University of Piraeus, Greece); _ N. Yannakakis - NTUA, May 2001 ( now Assistant Professor at the NTUA, Greece);

2 _ N. Halidias - NTUA, October 2001 ( now Assistant Professor at the University of Aegean, Greece); _ N. Matzakos - NTUA, May 2002 ( now Assistant Professor at the Technological Institute of Athens, Greece); _ E. Papageorgiou - NTUA, February 2003 ( now Assistant Professor at the Naval Academy of Greece); 2 _ S. Kyritsi - NTUA, December 2003 ( now Assistant Professor at the Naval Academy of Greece); _ M. Filippakis - NTUA, December 2006 ( now Assistant Professor at the University of Piraeus, Greece); _ S. A, Santos-University of Aveiro, Portugal, November _ S. A, Santos-University of Aveiro, Portugal, in progress. 6 Courses _ Di_erential Equations; _ Analysis I (one variable); _ Analysis II (several variables); _ Functional Analysis II; _ Nonlinear Analysis; _ Topics in Analysis. 7 Invitations _ Invited to give Colloquium talks at: { University of British Columbia, Canada; { Georgia Institute of Technology, USA; { University of California at Riverside, USA; { University of Modena, Italy; { University of Pau, France; { Andhra Pradesh University, India; { Humboldt University of Berlin, Germany; { University of Aveiro, Portugal. { University of Lisbon, Portugal. { University of Porto, Portugal. { University of South Florida, USA. { University of Ohio, USA. { Misouri State University, USA. _ Invited speaker to several international conferences. 3 8 Member of Editorial Boards _ Journal of Applied Mathematics and Stochastic Analysis ( ); _ Discussiones Mathematicae - Di_erential Inclusions, Optimal Control, Optimization; _ Nonlinear World ( ); _ Nonlinear Studies ( ); _ Mathematical Problems in Engineering ( ); _ Discrete and Continuous Dynamical Systems; _ Abstract and Applied Analysis _ Journal of Inequalities and Applications ( ); _ Nonlinear Analysis TMA ( ); _ International Jour. of Dynamical Systems and Di_erential Equations

3 9 Publications: 9.1 Books 1. (with S. Hu):\Hanbook of Multivalued Analysis. Volume I: Theory", Kluwer, Dordrecht (1997). 2. (with S. Hu):\Hanbook of Multivalued Analysis. Volume II: Applications", Kluwer, Dordrecht (2000). 3. (with Z. Denkowski{S. Mig_orski): \An Introduction to Nonlinear Analysis: Theory", Kluwer/Plenum, New York (2003). 4. (with Z. Denkowski{S. Mig_orski): \An Introduction to Nonlinear Analysis: Applications", Kluwer/Plenum, New York (2003). 5. (with L. Gasi_nski): \Nonlinear Analysis", Chapman and Hall/CRC, Boca Raton (2006). 6. (with L. Gasi_nski):\Nonsmooth Critical Point Theory and Nonlinear Boundary Value Problems", Chapman and Hall/CRC, Boca Raton (2005). 7. (with S. Th. Kyritsi):\Handbook of Applied Analysis", Springer-Verlag, New York (2009). 8. (with D. Motreanu{V. V. Motreanu):\Topological and Variational Methods with Applications to Nonlinear Boundary Value Problems", Springer-to appear. 9.2 Papers Selected 370 Publications: 1. \Fixed point theorems for multifunctions in metric and vector spaces", Nonlin. Analysis, 7 (1983), 763{ \Nonsmooth analysis on partially ordered vector spaces. Part 2: Nonconvex case, Clarke's theory", Paci_c J. Math., 109 (1983), 463{ \Random _xed point theorems for multifunctions", Japonica, 29 (1984), 93{ \On the theory of Banach space valued multifunctions; Part 1: Integration and conditional expectation", J. Multiv. Anal., 17 (1985), 185{ \Representation of set-valued operators", Trans. AMS, 292 (1985), 557{ \Pareto e_ciency in locally convex spaces I", Numer. Funct. Anal. Optim., 8 (1985), 83{ \Pareto e_ciency in locally convex spaces II: Stability results", Numer. Funct. Anal. Optim., 8 (1985), 117{ \A stability result for di_erential inclusions in Banach spaces", J. Math. Anal. Appl., 118 (1986), 231{ \Random _xed point theorems for measurable multifunctions in Banach spaces", Proc. AMS, 97 (1986), 507{ \Integral functionals in Souslin locally convex spaces", J. Math. Anal. Appl., 113 (1986), 544{ \Flow invariance and viability for di_erential inclusions", Appl. Anal., 21 (1986), 235{ \A stability result for di_erential inclusions in Banach spaces", J. Math. Anal. Appl., 118 (1986), 232{ \On the e_ciency and optimality of allocations II", SIAM J. Control Optim., 24 (1986), 452{ \E_ciency and optimality in economies described by coalitions", J. Math. Anal. Appl., 116 (1986), 497{ \Convergence theorems for Banach space valued integrable multifunctions", Intern. J. Math. Sci., 10 (1987), 433{ \On multivalued evolution equations and di_erential inclusions in Banach spaces", Comm. Math.

4 Univ. S.P., 36 (1987), 27{ \A relaxation theorem for di_erential inclusions in Banach spaces", T^ohoku Math. Jour., 39 (1987), 505{ \On quasilinear di_erential inclusions in Banach spaces", Bull. Polish Acad. Sci., 35 (1987), 407{ \On the solution set of di_erential inclusions in Banach spaces", Appl. Anal., 25 (1987), 319{ \Contributions to the theory of set-valued functions and set-valued measures", Trans. AMS, 304 (1987), 245{ \On the attainable set of di_erential inclusions and control systems ", J. Math. Anal. Appl., 125 (1987), 305{ \On Cesari's property Q", J. Optim. Theory Appl., 53 (1987), 259{ \On measurable multifunctions with applications to random multivalued equations", Math. Japonica, 32 (1987), 437{ \On Cournot-Nash equilibria in generalized games with a continuum of players" (with M. A. Khan), Nonlin. Anal., 11 (1987), 741{ \Cournot-Nash equilibria in generalized qualitative games with an atomless measure space of agents" (with M. A. Khan), Proc. AMS, 100 (1987), 505{ \Convergence in approxiamtion and nonsmooth analysis" (with D. Kandilakis), J. Approx. Theory, 49 (1987), 41{ \A convergence theorem for set-valued supermartingales with values in a separable Banach space", Stoch. Math. Anal. Appl., 4 (1987), 405{ \Convergence and approximation results for measurable multifunctions" (with R. Lucchetti, F. Patrone), Proceedings AMS, 100 (1987), 551{ \Decomposable sets in the Lebesgue-Bochner spaces", Comm. Math. Univ. S. P., 37 (1988), 49{ \Viable and periodic trajectories for di_erential inclusions of neutral type in Banach spaces", Kobe Jour. Math., 5 (1988), 29{ \On bounded solutions of di_erential inclusions in Banach spaces", J. Math. Anal. Appl., 135 (1988), 29{ \Volterra integral inclusions in Banach spaces", J. Integral Eqns, 1 (1988), 65{ \Existence and convergence results for integral inclusions in Banach spaces", J. Integral Eqns, 1 (1988), 265{ \Integrals of families of vector-valued functions", Tamkang J. Math., 19 (1988), 65{ \Measurable multifunctions and their applications to convex integral functionals", Intern. J. Math. Math. Sci., 12 (1989), 175{ \Viable solutions for evolution inclusions" (with E. Avgerinos), Yokohama Math. Jour., 37 (1989), 101{ \Properties of the relaxed trajectories of evolution equations and optimal control ", SIAM J. Control Optim., 27 (1989), 267{288.

5 38. \Functional-di_erential inclusions in Banach spaces with nonconvex right-hand side", Funkc. Ekvacioj, 32 (1989), 145{ \On the properties of the Aumann integral with applications to di_erential inclusions and control systems" (with D. Kandilakis), Czech. Math. Jour., 39 (1989), 1{ \Nonconvex perturbations of evolution equations with m-dissipative operator in Banach spaces" (with E. Avgerinos), Comm. Univ. Carol., 80 (1989), 657{ \Relaxation of in_nite dimensional variational and control problems with state constraints", Kodai Math. Jour., 12 (1989), 392{ \On the solution set of di_erential inclusions with state constraints", Appl. Anal., 31 (1989), 279{ \On multivalued semilinear evolution equations", Boll. UMI, 3-B (1989), 1{ \Boundary value problems for evolution inclusions", Ann. Polonici Math., Vol. 50 (1989), 129{ \Existence of solutions for integral inclusions of Urysohn-type with nonconvex valued orientor _eld", J. Optim. Theory Appl., 64 (1990), 207{ \Optimal control for nonlinear evolution inclusions", J. Optim. Theory Appl., 67 (1990), 321{ \Pareto optimality for in_nite dimensional control systems" (with E. Avgerinos), Intern. J. Math. and Math. Sci., 13 (1990), 1{ \On in_nite dimensional control systems with state and control constraints", Proc. Indian Acad. Sci., 100 (1990), 65{ \Weak convergence and weak compactness for multifunctions with values in a separable Banach space", Proc. AMS, 109 (1990), 677{ \On a paper by Khan and Majumdar", J. Math. Anal. Appl., 150 (1990), 574{ \On transition multimeasures with values in a Banach space", Studia Mathematica, 97 (1990), 37{ \Convergence and representation theorems for set-valued random processes", J. Math. Anal. Appl., 150 (1990), 129{ \Properties of the trajectories of set-valued integrals in Banach spaces", Bull. Austr. Math. Soc., 41 (1990), 271{ \Sensitivity analysis of evolution inclusions and its applications to the variational stability of optimal control problems", Houston J. Math., 16 (1990), 509{ \Optimal control and relaxation for a class of nonlinear distributed parameter systems" (with E. Averginos), Osaka Journ. of Math., 27 (1990), 745{ \Optimality conditions for systems with insu_cient data" (with A. Papageorgiou), J. Math. Soc. Japan, 42 (1990), 387{ \Relaxation and existence of optimal controls for systems governed by evolution inclusions in separable Banach spaces", J. Optim. Theory Appl., 64 (1990), 573{ \On the sensitivity and relaxability of optimal control problems governed by nonlinear evolution equations with state constraints" (with E. Avgerinos), Monatsshefte f ur Math., 109 (1990), 1{ \Nonconvex and nonmonotone perturbations of evolution inclusions of subdi_erential type", Periodica Math. Hungarica, 21 (1990), 167{ \On evolution inclusions associated with time-dependent convex subdi_erentials", Comm. Math. Univ. Carol., 31 (1990), 517{527.

6 61. \Radon-Nikodym theorems for multimeasures and transition multimeasures", Proceedings of the AMS, 111 (1991), 465{ \A convergence result for a sequence of distributed parameter optimal control problems", J. Optim. Theory Appl., 43 (1991), 29{ \Relaxability and well-posedness or in_nite dimensional control problems", Problems of Control and Inform. Theory, 20 (1991), 203{ \On the optimal control and relaxation of _nite dimensional systems driven by maximal monotone di_erential inclusions", Problems of Control and Inform. Theory, 20 (1991), 245{ \Volterra integrodi_erential inclusions in reexive Banach spaces", Funkc. Ekvacioj, 34 (1991), 257{ \Nonlinear Volterra integrodi_erential evolution inclusions and optimal control", Kodai Math. Jour., 14 (1991), 254{ \Existence of solutions for integrodi_erential inclusions in Banach spaces", Comm. Math. Univ. Carol., 32 (1991), 687{ \On the relation between relaxability and performance stability for optimal control systems governed by nonlinear evolution equations", Intern. Jour. Systems Sci., 22 (1991), 237{ \Existence of optimal controls for a class of nonlinear distributed parameter systems", Bull. Australian Math. Soc., 111 (1991), 465{ \Maximal control of maximal monotone di_erential inclusions in RN", Intern. Jour. Systems Sci., 23 (1992), 2253{ \On the optimal control of strongly nonlinear evolution equations", Appl. Math. Comput., 48 (1992), 177{ \On U(_)-invariance for _nite and in_nite dimensional control systems" (with E. Avgerinos, E. Flytzanis), Acta Math. Hung., 59 (1992), 309{ \Properties of the solution set of evolution inclusions driven by time-dependent subdi_erentials", Comm. Math. Univ. Carol., 33 (1992), 197{ \Extremal solutions to a class of multivalued integral inclusions" (with S. Aizicovici), J. Appl. Math. Stoch. Anal., 5 (1992), 205{ \Extremal solutions of evolution inclusions with time dependent convex subdi_erentials", Math. Nachr., 158 (1992), 219{ \On the solution set of a class of nonlinear evolution inclusions", Kodai Math. Jour., 15 (1992), 387{ \Continuous dependence results for a class of evolution inclusions", Proc. Edinburgh Math. Soc., 35 (1992), 139{ \On the solution set of evolution inclusions driven by time-dependent subdi_erentials", Math. Japonica, 37 (1992), 1087{ \Minimization of nonsmooth integral functionals" (with A. S. Papageorgiou), Intern. J. Math. & Math. Sci., 15 (1992), 673{ \Optimal control and relaxation of nonlinear elliptic systems", Monats. f ur Math., 114 (1992), 209{ \Integral inclusions of Volterra type in Banach spaces", Czech. Math. Jour., 42 (1992), 693{714.

7 8 82. \A viability result for nonlinear time-dependent evolution inclusions", Yokohama Math. Jour., 40 (1992), 73{ \On the existence of weakly maximal programs for a multisector economy with consumption", Intern. Jour. Systems Sci., 23 (1992), 2253{ \On the properties of multimeasures with values in a Banach space", Comm. Math., 32 (1992), 111{ \Fixed points and best approximations for measurable multifunctions with stochastic domain", Tamkang J. Anal. Appl., 23 (1992), 197{ \Convergence theorems for set-valued martingales and semimartingales", Analysis Math., 18 (1992), 283{ \Weak convergence of random sets in Banach spaces", J. Math. Anal. Appl., 164 (1992), 571{ \Optimal control of nonlinear evolution equations with nonmonotone nonlinearities", J. Optim. Theory Appl., 77 (1993), 643{ \On the bang-bang principle for nonlinear evolution inclusions", Aequationes Math., 45 (1993), 267{ \Optimal control, sensitivity analysis and relaxation of maximal integrodi_erential inclusions in RN", Periodica Math. Hugarica, 27 (1993), 163{ \Multivalued Volterra integral equations in Banach spaces" (with S. Aizicovici), Funkc. Ekvacioj, 36 (1993), 275{ \A property of nonlinear evolution inclusions with state constraints", Math. Japonica, 38 (1993), 559{ \In_nite dimensional parametric optimal control problems" (with S. Aizicovici), Math. Nachr., 162 (1993), 17{ \Convexity of the orientor _eld and the solution set of a class of evolution inclusions", Math. Slovaca, 43 (1993), 593{ \On the properties of the solution set of nonconvex evolution inclusions of the subdi_erential maximal type", Comm. Math. Univ. Carol., 34 (1993), 673{ \On the existence of weakly maximal optimal stationary programs for an in_nite dimensional growth model", Rend. Circolo Mathem. Palermo, 42 (1993), 20{ \continuous dependence results for subdi_erential evolution inclusions", Zeitschrift f ur Anal. Anwend., 12 (1993), 137{ \Time-optimal control for in_nite dimensional linear systems", Indian J. Pure Appl. Math., 24 (1993), 155{ \Convergence theorems for set-valued conditional expectations", Comm. Math. Univ. Carol., 34 (1993), 97{ \Weakly maximal stationary programs for a discrete time stochastic growth model" (with G. Pantelides), Japan Jour. Indust. Appl. Math., 10 (1993), 471{ \On the existence of periodic solutions for a class of nonlinear evolution inclusions" (with S. Hu), Bolletino dell'unione Matematica Italiana, 7B (1993), 591{ \On the solution set of nonconvex subdi_erential evolution inclusions", Czech. Math. J., 44 (1994), 481{ \Nonconvex valued Volterra integral inclusions in Banach spaces", Czech. Math. J., 44 (1994), 631{648.

8 104. \A strong relaxation theorem for maximal monotone di_erential inclusions with memory", Arch. Math. (Brno), 30 (1994), 227{ \Weakly maximal programs for a multisector growth model", J. Math. Anal. Appl., 183 (1994), 624{ \A sensitivity analysis of Volterra integral inclusions with applications to optimal control problems" (with S. Aizicovici), J. Math. Anal. Appl., 186 (1994), 97{ \Controllability of in_nite dimensional systems with control constraints", J. Math. Anal. Appl., 186 (1994), 523{ \Viability theorems for nonautonomous di_erential inclusions with nonconvex domain", Math. Japonica, 40 (1994), 67{ \Optimization of parametric nonlinear evolution equations", Yokohama Math. Jour., 42 (1994), 107{ \Parametrized relaxation for evolution inclusions of the subdi_erential type", Inter. J. Syst. Sci., 25 (1994), 1707{ \Boundary value problems and periodic solutions for semilinear evolution inclusions", Comm. Math. Univ. Carol., 35 (1994), 325{ \Support prices for weakly maximal programs of growth model with uncertainty", Comm. Math. Univ. Carol., 35 (1994), 581{ \On the topological regularity of the solution set of di_erential inclusion with constraints" (with S. Hu), J. of Di_erential Equations, 107 (1994), 280{ \Optimal programs and their price characterization in a multisector growth model with uncertainty", Proceedings of the AMS, 122 (1994) 227{ \A continuous version of the relaxation theorem for nonlinear evolution inclusions", Houston J. Math., 20 (1994), 685{ \On Fatou's Lemma and parametric integrals for set-valued functions", J. Math. Anal. Appl., 187 (1994), 809{ \Identi_cation of parameters in systems governed by nonlinear evolution equations", Publicationes Math. Debreen, 48 (1994), 1{ \On the topological properties of the solution set of evolution inclusions involving time dependent subdi_erential operators", Bollettino dell' UMI, 9B (1995), 359{ \Minimax control of nonlinear evolution equations", Appl. Math. Comp., 68 (1995), 217{ \On parametric evolution inclusions of the subdi_erential type with applications to optimal control problems", Transactions of AMS, 347 (1995), 203{ \Generalizations of Browder's degree theory" (with S. Hu), Transactions of AMS, 347 (1995), 233{ \Existence theory for nonlinear distributed parameter optimal control systems", Japan Jour. Indust. Appl. Math., 12 (1995), 457{ \Optimality conditions for systems driven by nonlinear evolution equations", Math. Problems of Engineering, 1 (1995), 27{ \On periodic solutions of functional-di_erential inclusions in RN" (with N. Shahzad), Dyn. Cont. Disc. Imp. Systems, 1 (1995), 40{49.

9 125. \Existence and strong relaxation theorems for nonlinear evolution inclusions" (with N. Shahzad), Yokohama Math. Jour., 43 (1995), 73{ \On the conditional expectation and convergence properties of random sets", Transactions of AMS, 347 (1995), 2495{ \On the variational stability of a class of nonlinear parabolic optimal control problems", Zeitschr. f ur Anal. und Anwend., 15 (1996), 245{ \Time-dependent integral inclusions in Banach spaces" (with S. Aizicovici, Y. Ding), Disc. Cont. Dyn. Systems, 2 (1996), 53{ \Existence theorems for nonlinear boundary value problems for second order di_erential inclusions" (with D. Kandilakis), J. Di_erential Eqns, 132 (1996), 107{ \Optimal control and admissible relaxation for uncertain nonlinear elliptic systems", J. Math. Anal. Appl., 197 (1996), 27{ \On the existence of extremal periodic solutions for nonlinear parabolic problems with discontinuities" (with E. Avgerinos), J. Di_erential Eqns, 136 (1996), 179{ \Extremal solutions for nonlinear parabolic problems with discontinuities" (with T. Cardinali, A. Fiacca), Monats. f ur Math., 124 (1997), 119{ \Di_erential variational inequalities in RN" (with E. Avgerinos), Indian J. Pure Appl. Math., 28 (1997), 1267{ \On the structure of the solution set of evolution inclusions with time-dependent subdi_erentials" (with F. Papalini), Rend. Sem. Mat. Univ. Padova, 97 (1997), 163{ \Random evolution inclusions of the subdi_erential type" (with F. Papalini), Stoch. Anal. Appl., 15 (1997), 801{ \On the existence of solutions for nonlinear parabolic problems with nonmonotone discontinuities", J. Math. Anal. Appl., 205 (1997), 434{ \Properties of the solution set of nonlinear evolution inclusions" (with N. Shahzad), Appl. Math. Optim., 36 (1997), 1{ \Evolution inclusions involving a di_erence term of subdi_erentials", Indian J. Pure. Appl. Math., 28 (1997), 575{ \Transition vector measures and multimeasures and parametric set-valued integrals", Rocky Mountain J. Math., 27 (1997), 1{ \On a nonstationary discrete-time and periodic solutions for nonlinear evolution inclusions" (with F. Papalini{S. Vercillo), Comm. Math. Univ. Carol., 38 (1997), 193{ \Minimal solutions for nonlinear parabolic problems with unilateral constraints" (with F. Papalini{ S. Vercillo), Houston J. Math., 23 (1997), 189{ \Convex integral functionals", Transactions of AMS, 349 (1997), 1421{1436.

10 143. \Solutions and periodic solutions for nonlinear evolution equations with nonmonotone perturbations" (with E. Avgerinos), Zeits. f ur Anal. und ihre Anwend., 17 (1998), 859{ \Nonlinear periodic parabolic problems with nonmonotone discontinuities" (with D. Kandilakis), Proc. Edinburgh Math. Soc., 41 (1998), 117{ \Time dependent subdi_erential evolution inclusions and optimal control" (with S. Hu), Memoirs of the AMS, 632 (1998) \Existence and relaxation results for nonlinear second order multivalued boundary value problems in RN" (with N. Halidias), J. Di_. Equations, 147 (1998), 123{ \Existence of solutions and periodic solutions for nonlinear evolution inclusions" (with F. Papalini{ F. Renzacci), Rend. Circolo Mat. Palermo, 48 (1999), 341{ \Nonlinear hemivariational inequalities at resonance" (with L. Gasi_nski), Bull. Australian Math. Soc,, 60 (1999), 353{ \Almost sure convergence and decomposition of multivalued random process" (with E. Avgerinos), Rocky Mountain J. Math., 29 (1999), 401{ \Existence and relaxation theorems for nonlinear multivalued boundary value problems" (with E. Avgerinos), Appl. Math. Optim., 39 (1999), 257{ \Periodic solutions for nonconvex di_erential inclusions", (with S. Hu{D. Kandilakis), Proc. AMS, 127 (1999), 89{ \Nonlinear nonmonotone evolution inclusions" (with F. Papalini{N. Yannakakis), invited paper on the special issue on \Nonlinear Operator Theory" (ed. D. O'Regan), Mathematical and Computer Modeling, 32 (2000), 1345{ \Nonsmooth critical point theory and nonlinear elliptic equations at resonance" (with N. Kourogenis), J. Australian. Math. Soc., 69 (2000), 245{ \Multiple solutions for nonlinear discontinuous strongly resonant elliptic problems" (with N. Kourogenis), J. Math. Soc. Japan, 53 (2001), 17{ \Solutions and multiple solutions for quasilinear hemivariational inequalities at resonance" (with L. Gasi_nski), Proc. Royal Soc. Edinburgh, 131A (2001), 1091{ \On nonlinear hemivariational inequalities" (with G. Smyrlis), Vol.419 of Dissertations Math (Rozprawy Mat). 37 (2001) 9{ \Periodic problems for strongly nonlinear second order di_erential inclusions" (with S. Th. Kyritsi{ N. Matzakos), J. Di_. Eqns, 183 (2002), 279{ \Extremal periodic for sudi_erential evolution inclusions" (with S. Hu), Di_erential Equations and Dynamical Systems, 10 (2002), 277{ \Nonlinear boundary value problems for di_erential inclusions" (with R. Bader), Math. Nachr,

11 244 (2002), 5{ \An obstacle problem for nonlinear hemivariational inequalities at resonance" (with S. Th. Kyritsi), J. Math. Anal. Appl., 276 (2002), 292{ \Two bounded solutions of positive sign for nonlinear hemivariational inequalities at resonance" (with L. Gasi_nski), Publ. Math. Debrecen, 63 (2003), 29{ \Nonlinear hemivariational inequalities of second order using the method of upper and lower solutions" (with N. Kourogenis), Proc. AMS, 131 (2003), 2359{ \Existence and relaxation of _nite{dimensional optimal control problems driven by maximal monotone operators" (with F. Papalini), Zeitsch. Anal. Anwend., 22 (2003), 863{ \Positive solutions for second order multivalued boundary value problems" (with M. Filippakis{L. Gasi_nski), in \Nonlinear Analysis and Applications"eds. R. Agarwal-D. O'Regan, Kluwer, (2003), \Nonsmooth critical point theory on closed convex sets and nonlinear hemivariationals inequalities" (with S. Th. Kyritsi), Nonlin. Anal., 61 (2003), 373{ \On the convergence of solutions of multivalued parabolic equations and applications", (with Z. Denkowski{S. Mig_orski), Nonlin. Anal. 54 (2003), 667{ \Two nontrivial solutions for quasilinear periodic problems" (with E. Papageorgiou), Proc. AMS, 132 (2004), 429{ \Strongly nonlinear multivalued periodic problems with maximal monotone terms" (with E. Papageorgiou), Di_. Integral Eqns, 17 (2004), 443{ \Multiple solutions of constant sign for quasilinear hemivariational inequalities at resonance" (with S. Th. Kyritsi), Calculus of Variations and PDEs, 20 (2004), 1{ \Solvability of semilinear inequalities at resonance using generalized Landesman{Lazer conditions" (with S. Th. Kyritsi), Monatshefte f ur Math., 142 (2004), 227{ \Quasilinear hemivariational inequalities with strong resonance at in_nity" (with M. Filippakis{L. Gasi_nski), Nonlin. Anal., 56 (2004), 331{ \Multiple solutions for nonlinear elliptic equation at resonance with a nonsmooth potential" (with D. Motreanu), Nonlin. Anal., 56 (2004), 1211{ \Periodic problems with asymmetric nonlinearities and nonsmooth potentials" (with M. Filippakis{ L. Gasi_nski), Nonlin. Anal., 58 (2004), 683{ \Existence and multiplicity of positive solutions for nonlinear boundary value problems driven by the scalar p Laplacian" (with M. Filippakis), Comm. Pure Appl. Anal., 3 (2004), 729{ \Two nontrivial solutions for strongly resonant nonlinear elliptic equations" (with S. Th. Kyritsi{ D. Motreanu), Archiv der Math., 83 (2004), 60{69.

12 \Solutions for nonlinear variational inequalities with a nonsmooth potential" (with M. Filippakis), Abstract Appl. Anal., 2004:8 (2004), 635{ \Nonlinear second order periodic systems with nonsmooth potential" (with E. Papageorgiou), Proc. Indian Acad. Sci., 114 (2004), \Existence theorems for periodic di_erential inclusions in RN" (with M. Filippakis{L. Gasi_nski), Acta Math. Appl. Sinica, 20 (2004), 179{ \Periodic solutions for nonautonomous systems with nonsmooth quadratic or superquadratic potential" (with D. Motreanu{V. V. Motreanu), Topol. Meth. Nonlin. Anal., 24 (2004), 269{ \Nonlinear second order periodic systems with nonsmooth potential", Proc. Indian Acad. Sci., 114 (2004), 269{ \The Neumann problem for quasilinear di_erential equations" (with T. Cardinali{R. Servadei), Archiv. Math., 40 (2004), \Multivalued p-lienard systems" (with M. Filippakis), Fixed Point Theory and Appl., 2 (2004), \Solutions for nonlinear variational inequalities with nonsmooth potential" (with M. Filippakis), Abstract Appl. Anal., 40 (2004), \On nonlinear elliptic hemivariational inequalities of second order" (with L. Gasi_nski), Acta Math. Sci., 24 (2004), 451{ \Periodic solutions of second order equations with the scalar p-laplacian and nonsmooth potential" (with N. Yannakakis), Funkcialaj Ekvac., 47 (2004), \Existence of solutions for strongly nonlinear elliptic di_erential inclusions with unilateral constraints" (with D. Motreanu{V. Motreanu), Advances in Di_. Eqns, 9 (2005), 961{ \Solutions for doubly resonant nonlinear nonsmooth periodic problems", (with S. Th. Kyritsi), Proc. Edinburgh Math. Soc. 48 (2005), 199{ \Multiple solutions for strongly resonant nonlinear elliptic problems with discontinuities" (with S. Th. Kyritsi), Proc. Amer. Math. Soc., 133 (2005), 2369{ \Positive periodic and homoclinic solutions for nonlinear di_erential equations with nonsmooth potential" (with S. Hu), Positivity, 9 (2005), 1{ \Pairs of positive solutions of nonlinear elliptic equations with the p-laplacian and a nonsmooth potential" (with S. Th. Kyritsi), Annali di Mathematica Pura ed Appl., 184 (2005), 449{ \Positive solutions for nonlinear hemivariational inequalities" (with S. Hu), J. Math. Analysis Appl., 310 (2005), 161{ \Solvability of nonlinear variational-hemivariational inequalities" (with M. Filippakis), J. Math. Anal. Appl., 311 (2005), \Extremal solutions for nonlinear second order di_erential inclusions", (with P. Douka) Math. Nachrichten, 276 (2005), 1{ \On the existence of positive solutions for hemivariational inequalities driven by the p- Laplacian" (with M. Filippakis{L. Gasi_nski), J. Global Optim., 31 (2005), \Nontrivial solutions for semilinear hemivariational inequalities resonant at higher eigenvalues"

13 (with M. Filippakis{L. Gasi_nski), Acta Scientiarum Math., 71 (2005), 561{ \Extremal solutions and strong relaxation for second order multivalued boundary value problems" (with L. Gasi_nski), Czechoslovak Math. Journal., 55 (2005), 827{ \Second order nonlinear evolution inclusions I: Existence and relaxation results" (with N. Yannakakis), Acta Math. Sinica, 21 (2005), 977{ \Nonlinear boundary value problems for second order di_erential inclusions" (with S. Th. Kyritsi{ N. Matzakos), Czechoslovak Math. Jour., 55 (2005), 545{ \Some elliptic hemivariational and variational-hemivariational inequalities" (with S. Marano), Nonlin. Anal., 62 (2005), 757{ \Minimizers of nonsmooth fuctionals on manifolds and nonlinear eigenvalue problems with constraints" (with S. Th. Kyritsi), Public. Math. Debrecen, 67 (2005), 265{ \Pairs of solutions of constant sign for nonlinear periodic equations with unbounded nonlinearity" (with S. Hu), Bull. Belgian. Math. Soc., 12 (2005), 193{ \Existence of solutions for strongly nonlinear elliptic di_erential inclusions with unilateral constraints" (with D. Motreanu{V. V. Motreanu), Adv. Di_. Eqns, 9 (2005), 961{ \Periodic solutions for nonautonomous systems with nonsmooth quadratic and superquadratic potential" (with D. Motreanu{V. V. Motreanu), Topol. Meth. Nonlin. Anal., 24 (2005), 269{ \Nonlinear periodics problems with nonsmooth potential restricted in one direction" (with M. Filippakis{L. Gasi_nski), Public. Math. Debrecen, 68 (2006), 37{ \Second order nonlinear evolution inclusion II: Structure of the solution set" (with N. Yannakakis), Acta Math. Sinica, 22 (2006), 195{ \Nontrivial solutions for resonant hemivariational inequalities" (with Z. Denkowski{L. Gasi_nski), J. Global Optim., 34 (2006), 317{ \Two nontrivial critical points for nonsmooth functionals via local linking and applications" (with D. Kandilakis{N. Kourogenis), J. Global Optim., 34 (2006), 219{ \Multiplicity results for nonlinear Neumann problems" (with M. Filippakis{L. Gasi_nski), Canadian J. Math., 58 (2006), 64{ \Nonsmooth generalized quiding functions for periodic di_erential inclusions" (with M. Filippakis{ L. Gasi_nski), NoDEA., 13 (2006), 43{ \Periodic solutions of nonlinear evolution inclusions in Banach spaces" (with S. Aizicovici{V. Staicu), Jour. Nonlin. Conv. Anal., 7 (2006), 163{ \Periodic solutions for second order di_erential inclusions with scalar p-laplacian" (with S. Aizicovici{V. Staicu), Topol. Meth. in Nonlin. Anal., 27 (2006), 269{ \Multiple nontrivial solutions for p-laplacian equations with an asymmetric nonlinearity" (with S. Hu), Di_. Integ. Eqns, 19 (2006), 1371{

14 213. \On a Neumann problem with p-laplacian and a nonsmooth potential" (with S. Marano), Di_erential Integral Equations, 19 (2006), 1301{ \Resonant nonlinear periodic problems with the scalar p-laplacian and a nonsmooth potential" (with S. Aizicovici{V. Staicu), J. Math. Anal. Appl., 322 (2006), 913{ \Nontrivial solutions for resonant hemivariational inequalities" (with Z. Denkowski{L. Gasi_nski), Jour.Global Optim., 34 (2006), 317{ \Multiplicity of nontrivial solutions for elliptic equations with nonsmooth potential and resonance at higher eigenvalues" (with L. Gasi_nski{D. Motreanu), Proc.Indian Acad. Sci., 116 (2006), 233{ \Existence and Multiplicity of solutions for Neumann problems" (with D. Motreanu), J.Di_.Eqns, 232 (2007), 1{ \Neumann problems for nonlinear hemivariational inequalities" (with S. Hu), Math. Nachr., 3 (2007), 290{ \Existence of positive solutions for nonlinear noncoercive hemivariational inequalities" (with M. Filippakis), Canad. Math. Bull., 50 (2007), 356{ \Multiple nontrivial solutions for nonlinear eigenvalue problems" (with D. Motreanu{V. V. Motreanu), Proc. of the AMS, 135 (2007), 3649{ \Multiple solutions for strongly resonant periodic systems" (with V. Staicu), Nonlin. Anal., 67 (2007), 1895{ \A multiplicity theorem for problems wit the p-laplacian" (with E.Papageorgiou), J. Funct. Anal., 244 (2007), 63{ \On the existence of two nontrivial solutions of periodic problems with operators of p- Laplacian type" (with R. Agarwal{D. O'Regan), Di_. Eqns, 43 (2007), 1{ \Solutions and multiple solutions for problems with the p-laplacian" (with S. Hu), Monatshefte f ur Math., 150 (2007), 309{ \Multiple nontrivial solutions for nonlinear periodic problems with the p-laplacian" (with S. Aizicovicci{V. Staicu), J. Di_erential Eqns, 243 (2007), 504{ \A uni_ed approach for multiple constant sign and nodal solutions" (with D. Motreanu{V. V. Motreanu), Adv. Di_. Eqns, 12 (2007), 1363{ \Nonautonomous second order periodic systems:existence and mulitplicity of solutions" (with G. Barletta), J. Nonlin. Convex Anal., 8 (2007), 373{ \The method of upper-lower solutions to nonlinear second order di_erential inclusions" (with V. Staicu), Nonlin. Anal., 67 (2007), 708{ \A multiplicity theorem for the Neumann p-laplacian with an asymmetric nonsmooth potential" (with G. Barletta), J. Global Optim., 39 (2007), 365{ \Two nontrivial solutions for periodic systems with inde_nite linear part and a nonsmooth potential" (with D. Motreanu{V. V. Motreanu), Discrete Cont. Dynam. Systems, 19 (2007), 197{

15 231. \A degree theoretic approach for multiple solutions of constant sign for nonlinear elliptic equations" (with D. Motreanu{V. V. Motreanu), Manuscripta Math., 124 (2007), 507{ \Degree theory for operators of monotone type and nonlinear elliptic equations with inequality constraints" (with S. Aizicovici{V. Staicu), Memoirs of AMS, 196 (2008). item \A multiplicity theorem for hemivariational inequalities with a p-laplacian like di_erential operator" (with E. Rocha{V. Staicu), Nonlin. Anal., 69 (2008), 1150{ \Eigenvalue problem for nonlinear elliptic equations with unilateral constraints" (with M. E. Filippakis{V. Staicu), Nonlin. Anal., 69 (2008), 85{ \Positive solutions and multiple solutions at non-resonance, resonance and near resonance for hemivariational inequalities with the p-laplacian" (with D. Motreanu{V. V. Motreanu), Trans. of the AMS, 360 (2008), 2527{ \A multiplicity theorem for problems with the p-laplacian" (with D. Motreanu{V. V. Motreanu), Nonlin. Anal., 68 (2008), 1016{ \Multiple positive solutions for nonlinear eigenvalue problems with the p-laplacian" (with S. Hu), Nonlin. Anal., 69 (2008), 4286{ \A multivalued nonlinear system with the vector p-laplacian on the semi-in_nity interval" (with M. Filippakis), Canad. Math. Bull., 51 (2008), 217{ \Multiplicity theorems for p-superlinear elliptic problems" (with E. Rocha{V. Staicu), Calc. Var., 33 (2008), 199{ \Multiplicity of solutions for p-laplacian equations which need not be coercive" (with M. Filippakis), Advanced Nonlin. Studies, 8 (2008), 235{ \Existence of solutions for a class of hemivariational quasilinear periodic problems" (with P. Jebelean), Set Valued Analysis, 16 (2008), 923{ \Multiple constant sign and nodal solutions for nonlinear elliptic equations with the p- Laplacian" (with M. Filippakis), J. Di_. Eqns, 245 (2008), 1883{ \Eigenvalue problems for hemivariational inequalities" (with S. R. A. Santos{V. Staicu), Set Valued Analysis, 16 (2008), 1061{ \Positive solutions for nonlinear periodic problems" (with M. Filippakis{V. Staicu), Positivity, 12 (2008), 733{ \Pairs of positive solutions for p-laplacian equations with sublinear and superlinear nonlinearities which do not satisfy the AR-condition" (with E. Rocha), Nonlin. Anal., 70 (2008), 3854{ \Existence and multiplicity of solutions for Neumann p-laplacian type equations" (with L. Gasi_nski), Adv. Nonlin. Studies, 8 (2008), 843{ \Three nontrivial solutions for the p-laplacian with a nonsmooth potential" (with S.R. A. Santos{ V. Staicu), Nonlin. Anal., 68 (2008), 3812{ \Twin positive solutions for p-laplacian nonlinear Neumann problems via variational and degree theoretic methods" (with R. Agarwal{M. Filippakis{D. O'Regan), J. Nonlin. Convex Anal., 9 (2008), 1{23. 17

16 248. \Multiple solutions for doubly resonant elliptic problems using critical groups" (with R. Agarwal{ M. Filippakis{D. O'Regan), CUBO, 10 (2008), 21{ \On the existence of multiple nontrivial solutions for resonant Neumann problems" (with S.R. A. Santos{V. Staicu), J. Nonlin. Convex Analysis, 9 (2008), 351{ \Fixed point theory in Frechet spaces for inward and weakly inward Volterra type operators" (with D. O'Regan), Nonlin. Funct. Anal. Appl., 13 (2008), 643{ \Multiple nontrivial solutions for semilinear elliptic Neumann problems with inde_nite linear part" (with M. Filippakis), Dynamic Systems Appl., 17 (2008), 371{ \A multiplicity theorem for hemivariational inequalities with a p-laplacian-like di_erential operator" (with E. M. Rocha{V. Staicu), Nonlin. Anal., 69 (2008), 1150{ \Eigenvalue problems for nonlinear elliptic equations with unilateral constraints" (with M. Filippakis{V. Staicu), Nonlin. Anal., 69 (2008), 85{ \A multiplicity theorem for a variable exponent Dirichlet problem" (with E. M. Rocha), Glasgow Math J., 50 (2008), 1{ \Nonlinear elliptic equations with an asymptotically linear reaction term" (with G. Smyrlis), Nonlin. Anal., 71 (2009), 3129{ \Constant sign and nodal solutions for problems with the p-laplacian and a nonsmooth potential using variational techniques" (with R. Agarwal{M. Filippakis{D. O'Regan), Boundary Value Problems, (2009), \Solutions and multiple solutions for periodic p-laplacian systems with a nonsmooth potential" (with G. Barletta), Nonlin. Anal., 71 (2009), 4321{ \A variational inequality on the half line" (with A. Kristaly{I. Lazar), Nonlin. Anal., 71 (2009), 5003{ \Multiple solutions for nonlinear Neumann problems with the p-laplacian and a nosmooth crossing potential" (with G. Smyrlis), Nonlinearity, 22 (2009), 1{ \Nontrivial solutions for superquadratic nonautonomous periodic systems" (with S. Hu), Topological Methods Nonlinear Anal., 34 (2009), 327{ \Existence of three nontrivial solutions for nonlinear Neumann hemivariational inequalities" (with A. Iannizzotto), Nonlin. Anal., 70 (2009), 2385{ \Pairs of positive solutions for the periodic scalar p-laplacian" (with F. Papalini), J. Fixed Point Theory Appl., 5 (2009), \Existence of a pair of positive solutions for a class of nonlinear eigenvalue problems" (with M. Filippakis), Positivity, 13 (2009), 783{ \Existence of two nontrivial solutions via homological local linking for the noncoercive p- Laplacian Neumann problem" (with D. O'Regan), Nonlin. Anal., 70 (2009), 4386{ \Three nontrivial solutions for periodic problems with the p-laplacian" (with L. Gasi_nski), Comm. Pure Appl. Anal., 8 (2009), 1421{1437.

17 \Multiple solutions for nonlinear coercive Neumann problems" (with S. Th. Kyritsi), Comm. Pure Appl. Anal., 8 (2009), 1957{ \Three nontrivial solutions for not necessarily coercive p-laplacian equations" (with S. Hu), Proceedings of the Edinburgh Math. Soc., 52 (2009), 679{ \The spectrum and an index formula for the Neumann p-laplacian and multiple solutions for problems with crossing nonlinearity" (with S. Aizicovici{V. Staicu), Discr. Cont. Dynam. Systems, 25 (2009), 431{ \On a p-superlinear Neumann p-laplacian equation" (with S. Aizicovicci{V. Staicu), Topol. Methods Nonlin. Anal., 34 (2009), \Nonlinear Neumann problems near resonance" (with D. Motreanu{V. V. Motreanu), Indiana Univ. Math. Jour., 58 (2009), 1257{ \Multiple solutions for resonant hemivariational inequalities via minimax methods" (with S. Th. Kyritsi{D. O'Regan), Advanced Nonlin. Studies, 9 (2009), 453{ \Existence of nonzero solutions with exact sign for a p-laplacian equation" (with M. Filippakis{A. Kristaly), Discrete Contin. Dynam. Systems, 24 (2009), 405{ \Existence of multiple solutions with precise sign information for superlinear Neumann problems" (with S. Aizivovici{V. Staicu), Annali di Mat. Pura et Appl., 188 (2009), 679{ \Nodal and multiple constant sign solutions for resonant p-laplacian equation with a nonsmooth potential" (with L. Gasi_nski), Nonlin. Anal., 71 (2009), 5747{ \Multiple solutions for noncoercive resonant Neumann hemivariational inequalities" (with M. Filippakis{D. O'Regan), Commun. Appl. Anal., 13 (2009), 305{ \Multiple solutions for Dirichlet problems which are superlinear at _ and sublinear at inf" (with D. Motreanu{V. V. Motreanu), Commun. Appl. Anal., 13 (2009), 341{ \ On nonlinear parametric problems for p-laplacian-like operators" (with E. Rocha), Rev. R. Acad. Cien, Ser.A, Math., 103 (2009), 177{ \Multiplicity of solutions for a class of resonant p-laplacian Dirichlet problems" (with E. Papageorgiou), Paci_c J. Math., 241 (2009), 309{ \Existence and multiplicity of solutions for second order periodic systems with the p-laplacian and a nonsmooth potential" (with L. Gasi_nski), Monats. f ur Math., 158 (2009), \Multiple constant sign and nodal solutions for superlinear elliptic equations" (with S. Th. Kyritsi), Funkcialaj Ekvacioj, 52 (2009), 437{ \Multiple positive solutions for a p-laplacian Dirichlet problem with a superdi_usive reaction" (with S. Aizicovicci{V. Staicu), Houston J. Math., 36 (2010), 313{ \Multiple solutions for a class of Neumann problems on compact Riemannian manifolds with boundary" (with A. Kristaly{C. Varga), Canad. Math. Bull., 53 (2010), 674{ \On superquadratic periodic systems with inde_nite linear part" (with S. Th. Kyritsi), Nonlin. Anal., 72 (2010), 946{ \A multiplicity theorem for Neumann problems with asymmetric nonlinearity" (with G. Smyrlis),

18 Annali di Mat. Pura et Appl., 189 (2010), 253{ \Multiplicity theorems for semilinear elliptic problems depending on a parameter" (with A. Kristaly), Proc.Edinburgh Math.Soc., 52 (2010), 171{ \Existence of multiple solutions for nonlinear Dirichlet problems with a nonhomogeneous di_erential operator" (with S. Th. Kyritsi{D. O'Regan), Advanced Nonlin. Studies, 10 (2010), 631{ \Multiple nontrivial solutions for doubly resonant periodic problems" (with V. Staicu), Canad. Math. Bull., 53 (2010), 347{ \On the multiplicity of solutions for nonlinear periodic problems with the nonlinearity crossing several eigenvalues" (with S. Th. Kyritsi), Glasgow Math. Jour., 24 (2010), 271{ \Multiple nontrivial solutions for Neumann problems involving the p-laplacian" (with A. Kristaly), Advanced Nonlin. Studies, 10 (2010), 83{ \Existence and multiplicity of solutions for asymptotically linear noncoercive elliptic equations" (with D. Motreanu{V. V. Motreanu), Monatschefte f ur Math., 159 (2010), 59{ \Two positive for p-laplacian equations with convex and concave nonlinearities and a nonsmooth potential" (with M. Filippakis), Applicable Anal., 89 (2010), 193{ \Multiple positive solutions for a class of p-superlinear elliptic problems" (with S. Th. Kyritsi), Nonlinear Anal., 72 (2010), 3069{ \Multiplicity of solutions for parametric p-laplacian equations with nonlinearity concave near the origin" (with S. Hu), Tohoku Math J., 62 (2010), 137{ \A multipliciity theorem for doubly resonant periodic problems" (with L. Gasi_nski), Advanced Nonlin. Studies, 10 (2010), 819{ \Pairs of positive solutions for singular p-laplacian equations with a p-superlinear potential" (with S. Th. Kyritsi), Nonlinear Anal., 73 (2010), 1136{ \Twin positive solutions for singular nonlinear elliptic equations" (with J. Chen{E. M. Rocha), Topological Methods Nonlin. Anal., 35 (2010), 187{ \Existence and multiplicity of solutions for resonant nonlinear Neumann problems" (with S. Aizicovicci{V. Staicu), Topological Methods Nonlin. Anal., 35 (2010), 235{ \Multiple solutions for nonautonomous second order periodic systems" (with Z. Denkowski{L. Gasi_nski), Acta Mathematical Scientia, 30 (2010), 350{ \Multiple solutions for resonant nonlinear periodic equations" (with D. Motreanu{V. V. Motreanu), Nonlinear Di_er. Equat. Appl., 17 (2010), 535{ \Nontrivial solutions for nonvariational quasilinear Neumann problems" (with S. A. R. Santos{V. Staicu), Topological Methods Nonlin. Anal., 36 (2010), 39{ \On the existence of three nontrivial smooth solutions for nonlinear elliptic equations" (with E. M. Rocha{V. Staicu), J. Nonlinear Convex Anal., 11 (2010), 115{ \Multiple nontrivial solutions for resonant Neumann problems" (with M. Filippakis), Math. Nachr., 283 (2010), 1000{ \Existence and multiplicity of solutions for the noncoercive Neumann p-laplacian" (with E. M. Rocha), Conference on Variational and Topological Methods, Electronic J. Di_erential Equations, Conference, 18 (2010), 55{66.

19 304. \Three nontrivial solutions for p-laplacian Neumann problems with a concave nonlinearity near the origin" (with S. Aizicovicci{V. Staicu), Contemporary Math., Vol.513 (2010), 25{ \Multiple positive solutions for nonlinear periodic problems" (with S. Hu), Nonlinear Anal., 73 (2010), 3675{ \Nonlinear Neumann equations driven by a nonhomogeneous di_erential operator" (with S. Hu), Comm. Pure Appl. Anal., 9 (2010), 1801{ \Positive solutions and bifurcation phenomena for nonlinear elliptic equations of logistic type: The superdi_usive case" (with S. Aizicovicci{V. Staicu), Comm. Pure Appl. Anal., 9 (2010), 1507{ \Existence of three nontrivial smooth solutions for nonlinear resonant Neumann problems driven by the p-laplacian" (with L. Gasi_nski), Zeitschrift f ur Anal. Anwend, 29 (2010), 413{ \Nontrivial solutions for Neumann problems with an inde_nite linear part" (with L. Gasi_nski), Applied Math Comput., 217 (2010), 2666{ \A multiplicity theorem for p-superlinear p-laplacian equations using critical groups and Morse theory" (with S. Th. Kyritsi{D. O'Regan), Monatschefte f ur Math., 163 (2011), 471{ \Multiple solutions for noncoercive problems with the p-laplacian" (with L. Gasi_nski), Bull. Belgian Math. Soc., 18 (2011), 135{ \Positive solutions for nonlinear Neumann problems with concave and convex terms" (with G. Smyrlis), Positivity, 16 (2012), 271{ \Nonlinear resonant periodic problems with concave terms" (with S. Aizicovicci{V.Staicu), J.Math Anal. Appl., 375 (2011), 342{ \On p-laplace equations with concave terms and asymmetric nonlinearities" (with D. Motreanu{ V. V. Motreanu), Proc. Royal Soc. Edinburgh, 141A (2011), 171{ \On the existence of three nontrivial solutions for periodic problems driven by the scalar p- Laplacian" (with F. Papalini), Advanced Nonlin. Studies, 11 (2011), 455{ \Anisotropic nonlinear Neumann problems" (with L. Gasi_nski), Calc. Var. and PDE's, 42 (2011), 323{ \Neumann problems resonant at zero and in_nity" (with L. Gasi_nski), Annali di Mat. Pura Appl., 317 (2012), 395{ \Positive solutions for generalized nonlinear logistic equations of superdi_usive type" (with A. Iannizzotto), Topol. Meth. Nonlin.Anal., 38 (2011), 95{ \Positive solutions for nonlinear periodic problems with concave terms" (with S. Aizicovicci{V. Staicu), J. Math. Anal. Appl., 381 (2011), 866{ \A uni_ed treatment using critical point methods of the existence of multiple solutions for superlinear and sublinear Neumann problems" (with D. Motreanu{D. O'Regan), Commun. Pure Appl. Anal., 10 (2011), 1791{ \Existence of three nontrivial solutions for asymptotically p-linear nonresonance p-laplacian equations" (with E. M. Rocha), Nonlinear Anal., 74 (2011), 5314{5326.