User Thomas - Mathematics Stack Exchange

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	10,805 reputation	bio	website		visits	member for	1 year, 2 months
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67

85

votes

40

answers

4

kviews

Funny identities

big-list

apr 29 at 6:07 John Marty 1,070

13

46

votes

5

answers

3

kviews

Are all infinities equal?

infinity

aug 15 at 9:56 celtschk 4,528

13

35

votes

7

answers

966

views

How much Math do you REALLY do in your job?

soft-question career-development

feb 9 at 10:15 b.sahu 11

14

25

votes

2

answers

564

views

Reference request for tricky problem in elementary group theory

abstract-algebra group-theory reference-request

dec 8 at 23:15 Community♦ 1

7

22

votes

6

answers

794

views

Why is the Continuum Hypothesis (not) true?

set-theory cardinals incompleteness

sep 2 at 12:20 Landei 179

11

21

votes

1

answer

437

views

Ring of integers in p-adic field

algebraic-number-theory

sep 26 at 15:35 M Turgeon 4,551

12

17

votes

9

answers

3

kviews

Do infinity and zero really exist?

elementary-number-theory elementary-set-theory infinity

jun 17 '12 at 13:16 Hurkyl 21.5k

7

17

votes

2

answers

700

views

Does $\sin(x)=y$ have a solution in $\mathbb{Q}$ beside $x=y=0$

number-theory irrational-numbers transcendental-numbers

mar 30 at 20:48 Dominic Michaelis 11.9k

5

16

votes

7

answers

903

views

What am I losing if I decide to perform all math by computer?

soft-question advice

sep 1 at 2:56 Makoto Kato 11.3k

7

14

votes

1

answer

239

views

The importance of modular forms

riemann-surfaces modular-forms elliptic-functions

aug 28 at 0:17 Byron Schmuland 15.4k

2

13

votes

8

answers

1

kviews

Why are epsilon-delta proofs difficult?

teaching

aug 25 at 2:14 Tunococ 2,842

9

13

votes

1

answer

514

views

Impossible to prove vs neither true nor false

logic

jun 5 '12 at 20:55 Asaf Karagila 91.3k

8

12

votes

3

answers

438

views

Careers in Math

soft-question self-learning career-development

nov 17 at 3:43 amWhy 54.9k

6

12

votes

2

answers

200

views

Does $gHg^{-1}\subseteq H$ imply $gHg^{-1}= H$?

abstract-algebra group-theory algebraic-topology covering-spaces fundamental-groups

mar 19 at 18:54 DonAntonio 47k

4

11

votes

3

answers

113

views

Order of matrices in $GL_2(\mathbb{Z})$

linear-algebra abstract-algebra group-theory

mar 5 at 0:07 YACP 9,165

4

10

votes

3

answers

227

views

Problem about subsets of $\{1, 2,\dots,n\}$

combinatorics elementary-set-theory

mar 20 at 21:18 Sean Eberhard 2,708

13

10

votes

6

answers

2

kviews

Why bother with Mathematics, if Gödel's Incompleteness Theorem is true?

logic incompleteness meta-math

dec 7 at 7:25 Adrian 173

3

9

votes

2

answers

176

views

Find a Continuous Function

calculus

oct 8 at 18:06 fgp 4,919

2

8

votes

1

answer

97

views

Find the least interger m such that $S_n$ is embedd into $GL_m(F)$

group-theory

sep 5 at 7:48 Derek Holt 8,303

2

8

votes

5

answers

340

views

“Any one of” or “either”?

number-theory

jan 26 at 21:32 Cameron Buie 27.6k

2

8

votes

1

answer

60

views

Cyclic subgroups of $GL_2(\mathbb{Z}/p\mathbb{Z})$?

group-theory finite-groups abelian-groups

may 14 at 7:42 Alex B. 11.9k

2

7

votes

1

answer

183

views

Set of All Groups

group-theory logic set-theory

nov 14 at 19:02 Hagen von Eitzen 42.7k

1

6

votes

2

answers

234

views

Every normal subgroup of a finite group is contained in some composition series

abstract-algebra group-theory finite-groups simple-groups

sep 6 at 21:07 Jernej 1,144

1

6

votes

5

answers

508

views

Coin tosses until I'm out of money

probability combinatorics statistics

jul 16 at 20:07 Sam 6,954

3

6

votes

3

answers

387

views

How to deal with the temporary nature of my knowledge?

soft-question self-learning

may 8 '12 at 22:42 Scott Carter 1,453

2

6

votes

4

answers

706

views

Boy and Girl paradox

probability paradox

2d ago JeffJo 1

1

5

votes

5

answers

203

views

Let $G$ a group of order $6$. Prove that $G \cong \Bbb Z /6 \Bbb Z$ or $G \cong S_3$.

abstract-algebra group-theory finite-groups

may 6 at 14:44 MJD 21k

2

5

votes

1

answer

143

views

Irreducibility and weights of a representation

representation-theory lie-groups lie-algebras

mar 9 at 2:39 Dalimil Mazáč 232

1

5

votes

3

answers

195

views

Is this number irrational?

irrational-numbers

sep 5 at 15:32 KeithS 1,051

1

5

votes

3

answers

287

views

vector space without verification of the axioms

linear-algebra

sep 1 at 4:33 James S. Cook 2,761

Thomas

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