Joe Z.

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2,814 reputation

1517

bio	website	joezeng.com
	location
	age	19
visits	member for	1 year, 3 months
	seen	Apr 29 at 15:26
stats	profile views	280

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15 Favorites

added views newest activity votes

166

265

votes

115

answers

13

kviews

What was the first bit of mathematics that made you realize that math is beautiful? (For children's book)

soft-question recreational-mathematics education big-list teaching

may 6 at 4:59 Jori Mäntysalo 31

103

205

votes

33

answers

17

kviews

Do complex numbers really exist?

soft-question complex-numbers teaching philosophy

may 5 at 4:54 l19 115

97

175

votes

23

answers

7

kviews

Examples of apparent patterns that eventually fail

big-list examples-counterexamples

apr 10 at 3:04 Douglas B. Staple 1,014

45

101

votes

23

answers

5

kviews

Can't argue with success? Looking for “bad math” that “gets away with it”

examples-counterexamples

apr 3 at 15:45 Inceptio 4,305

7

15

votes

5

answers

462

views

Prove that line through intersection of line through foots of heights and opposite line and orthocenter is perpendicular to median.

geometry

mar 21 at 20:45 zyx 10.9k

3

12

votes

3

answers

163

views

What is the order of $2$ in $(\mathbb{Z}/n\mathbb{Z})^\times$?

group-theory elementary-number-theory finite-groups

mar 13 at 20:02 zero-divisor 215

3

7

votes

3

answers

284

views

Implies vs. Entails vs. Provable

logic

feb 16 at 9:35 Peter Smith 11.3k

1

9

votes

7

answers

313

views

Is $\forall x\,\exists y\, Q(x, y)$ the same as $\exists y\,\forall x\,Q(x, y)$?

logic quantifiers

feb 15 at 19:01 Zarrax 19.7k

29

130

votes

19

answers

4

kviews

Why don't we define “imaginary” numbers for every “impossibility”?

soft-question

dec 21 at 3:57 bibo 1

1

0

votes

1

answer

69

views

Finding a distribution from a many combinations of distributions

statistics probability-theory

dec 17 at 5:28 User1900 26

21

40

votes

13

answers

2

kviews

Pseudo Proofs that are intuitively reasonable

proof-strategy big-list

dec 8 at 21:02 Elias 2,848

2

6

votes

1

answer

200

views

Solutions of $p!q! = r!$

number-theory

may 27 '12 at 0:51 MJD 20.6k

5

9

votes

1

answer

785

views

The Ellipse Problem - finding an ellipse inside a triangle

geometry conic-sections triangle

apr 5 '12 at 16:02 Andrew MacFie 53

3

8

votes

2

answers

292

views

Infinite Series: Fibonacci/ $2^n$

sequences-and-series teaching fibonacci-numbers

feb 29 '12 at 13:33 Ragib Zaman 17.8k

4

10

votes

2

answers

169

views

Is it possible to construct an ordered field which is also algebraically closed?

abstract-algebra field-theory complex-numbers order-theory

nov 25 '11 at 7:01 Martin Sleziak 20.3k

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