Fantastic Mathematical Beasts and Where to Find Them. Mike Naylor
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1 Fantastic Mathematical Beasts and Where to Find Them Mike Naylor
2
3 Dividing by zero
4 Ask Siri
5 1:0 =? 0:0 =??
6 1: 1 = 1 1: 0,5 = 2 1: 0,25 = 4 1: 0,1 = 10 1:0 =? 1: 0,01 = 100 1: 0,001 = :0 =? 1: 0, = : 0, = lim x 0 1 x =
7 lim x 0 1 x = 1 0 =?
8 10:2 10 candies in a bowl Split them into 2 groups How many candies in each group?
9 10:2 10 candies in a bowl Split them into 2 groups How many candies in each group? 5 in each group. 10:2 = 5 Delingsdivisjon Partition division
10 10:2 10 candies in a bowl Take out 2 candies at a time How many times can you do that until the bowl is empty?
11 10:2 10 candies in a bowl Take out 2 candies at a time How many times can you do that until the bowl is empty? 5 ganger. 10:2 = 5 Målingsdivisjon Measurement division
12 10:0 10 candies in a bowl Split them into 0 groups How many candies in each group? Delingsdivisjon Partition division
13 10:0 10 candies in a bowl Split them into 0 groups How many candies in each group?
14 Målingsdivisjon 10:0 10 candies in a bowl Take out 0 candies at a time How many times can you do that until the bowl is empty?
15 10:0 10 candies in a bowl Take out 0 candies at a time How many times can you do that until the bowl is empty?? Is the bowl empty after an infinite number of times of removing 0 candies? No. Not even close! 10:0 is not infinity. 10:0 cannot be done.
16 a = b a 2 = ab a 2 b 2 = ab b 2 (a + b)(a b) = ab b 2 (a + b)(a b) = b(a b) a + b = b b + b = b 2b = b 2 = 1
17 Dividing by zero Infinity Pi Repeating decimals Fractals Iterated function systems Complex numbers
18 Gerd Åsta Bones Mike Naylor Thomas Ramdal
19 half circle = π smaller circle C = πd = π
20 π 2
21 π 2
22 π 2
23 π 2
24 π 2
25 π 2
26 π 2
27 π 2
28 π 2
29 π 2
30 π = 2
31
32
33
34
35 Strange things happen at infinity!
36 What is the difference between 1 and 0.999? =?
37 =? An infinite number of zeros with a 1 on the end. The smallest number before 0.
38 1/3 = /3 = /3 =
39 10x = x = x = x = = 1
40 If the average of a and b is b, what can we say about a and b? mean(1, )= : 2 =
41 Repeating decimals 1/98 =
42 Repeating decimals 1/98 =
43 Repeating decimals 1/998 =
44 1/8 = 0.125??? 1/98 = /998 = /9998 =
45 1/8 = 0.125??? 1/98 = /998 = /9998 =
46 1/8 = 0.125??? 1/98 = /998 = /9998 = /7 =? 1/97 = /997 =? 1/9997 =? 1/96 = 1/95 = 1/99 =? Powers of 1?
47 /89 =
48
49 powers of
50 powers of * * * * * * * * * *10 + 1
51 powers of
52 = 1/89
53 1 Pascals trekant
54 Sierpinsky triangle Species: Triangle Genus: Sierpinski Family: Two-dimensional Order: Iterated function systems Class: Fractal Phylum: Geometry Kingdom: Math
55 steg # areal for hver totalt area Sierpinski Trekant /4 3/ /16 9/ /64 27/ /256 81/ / /1024 n
56 Øyvind
57
58
59
60 The sphinx Riddle of the Sphinx What walks on 4 legs in the morning 2 legs in the afternoon and 3 legs in the evening?
61 Geometric Riddle of the Sphinx divide the sphinx in 4 equal sphinx-shaped pieces
62 Analysis Sphinx is made of 6 triangles
63 Analysis Or 6 x 4 = 24 smaller triangles Make 4 sphinxes from 6 little triangles each
64 Repeat
65 16 sphinxes
66 64 sphinxes
67 256 sphinxes
68 1024 sphinxes
69 4096 sphinxes
70 Sphinx fractal - Mike Naylor
71 Sphinx fractal - Mike Naylor
72 Mandelbrot set Xaos
73 Speed: UI /Zooming Speed /[3] Magnification power: Calculations/Iterations/[1000+] Animate color: Filters/Palette emulator Fractal/Palette/Color cycling (or press y )
74 Real number line
75 Real number line addition = translation
76 Real number line
77 Real number line 2 2 s t r e t c h
78 Real number line 2 1/
79 Real number line 2 1/2 stretch multiplication = stretching
80 Real number line
81 Real number line 2-1 = ?
82 Real number line 2-1 = = multiplying by a negative = rotate 180
83 Real number line x 2 = 4 x =? starting with 1, what can we multiply by twice to get to 4?
84 Real number line 4 has 2 roots: 2 and We usually say the square root of 4 is 2 and not -2 so that we can define square root as a function (a function can have only one output!) But if we think of square root as reverse of multiplication of a number by the same number, we can see -2 works as a starting point as well.
85 Real number line x 2 = -1 x =? What can we multiply with twice to get to -1? (starting at 1)
86 Real number line x 2 = -1 x =? rotation, distance 1
87 Real number line x 2 = -1 x =? rotation, distance 1 done twice goes to -1
88 Real number line This number here is a root of -1 (It s not on the real number line, but ok?)
89 Real number line What is the other root of -1?
90 Real number line rotation, distance 1
91 Real number line i = i = - -1
92 Complex number plane i i
93 3i Complex number plane 2i i (1,1) 1 + i i -2i -3i
94 3i 2i Complex number plane 4 + 2i i 1 + i i (1 + i) + (3 + i) -2i -3i
95 3i 2i Complex number plane 4 + 2i i 1 + i i (1 + i) + (3 + i) -2i 4 + 2i -3i
96 3i 2i i Complex number plane angle = 45 distance = i i (1 + i) (1 + i) or (1 + i) 2-2i rotate (1+i) an additional 45-3i
97 3i 2i i Complex number plane angle = 45 distance = i i (1 + i) (1 + i) or (1 + i) 2-2i rotate (1+i) an additional 45 stretch distance 2-3i
98 (1 + i) 2 = 0 + 2i 3i 2i i Complex number plane angle = 45 distance = i (1 + i) (1 + i) or (1 + i) 2-2i -3i rotate (1+i) an additional 45 stretch distance = 2
99 (1 + i) 2 = 0 + 2i 3i 2i i angle = 45 distance = (1 + i)(1 + i) -i (1 + i) (1 + i) or (1 + i) i + i + i i + i i + (-1) 0 + 2i -2i -3i rotate (1+i) an additional 45 stretch distance = 2
100 3i 2i i i Results of multiplying -2i numbers on the unit circle are on the unit circle -3i
101 3i Cube root of 3? 2i i i -2i 3-1 = -1-3i
102 3i Cube root of 3? 2i i i -2i -3i
103 3i Cube root of 3? (1/2 + i 3/2) (1/2 + i 3/2) 2i 1/2) 2 + 2(1/2)i 3/2) + (i 3/2) 2 1/4 + i 3/2 3/4 i -1/2 + i 3/2 1 2, (-1/2 + i 3/2) (1/2 + i 3/2) -i -1/4 i 3/4 + i 3/4 + (i 3/2) /4 3/4-2i + i i
104 3i 3-1 2i i i -2i -3i
105 3i 4-1 2i i i -2i -3i
106 3i 5-1 2i i i -2i -3i
107 3i 6-1 2i i i -2i -3i
108 2 ( 1 + i ) = ( 1 + i )( 1 + i ) = 0 + 2i 0 + 2i 1 + i
109 2 ( 0 + 2i ) = 0 + 4i 2 = 4 + 0i 0 + 2i 4 + 0i
110 (-4 + 0i) 2 = i (16 + 0i) 2 = i 4 + 0i
111 2 Z orbit of (1 + i)
112 Z 2 + C orbits create the Mandelbrot set
113 Z 2 + C orbits create the Mandelbrot set
114 Choose Starting Point: C= i initial Z = i 1.0 i 0.5 i 2 Z = i 2 Z + C = i new Z = i
115 Choose Starting Point: C= i new Z = i 1.0 i 0.5 i 2 Z = i 2 Z + C = i
116 Choose Starting Point: C= i new Z = i 1.0 i 0.5 i Z 2 = i 2 Z + C = i
117 Choose Starting Point: C= i new Z = i 1.0 i 0.5 i Z 2 = i 2 Z + C = i
118 Point C = i has a stable orbit. 1.0 i Color point C black 0.5 i
119 Choose Starting Point: C= i initial Z = i 1.0 i 0.5 i 2 Z = i 2 Z + C = i
120 Choose Starting Point: C= i new Z = i 1.0 i 0.5 i 2 Z = i 2 Z + C = i
121 Choose Starting Point: C= i new Z = i 1.0 i 0.5 i 2 Z = i 2 Z + C = i
122 Choose Starting Point: C= i new Z = i 1.0 i 0.5 i 2 Z = i 2 Z + C = i
123 Choose Starting Point: C= i new Z = i 1.0 i 0.5 i 2 Z = i 2 Z + C = i
124 Point C = i has an orbit that escapes to infinity. 1.0 i 0.5 i Color point C white
125 Repeat this process for millions of points. 1.0 i The points with stable orbits (black) are the M-Set.
126
127 God jul! Takk for meg! Mike Naylor matematikkbolgen.com mike-naylor.com Facebook Matematikkbølgen
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