User Noah Snyder - Mathematics Stack Exchange

435 votes

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Is it true that $0.999999999\ldots=1$?

answered Jul 20, 2010 at 19:38

211 votes

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What Does it Really Mean to Have Different Kinds of Infinities?

answered Jul 20, 2010 at 19:22

45 votes

Why is $1$ not a prime number?

answered Jul 20, 2010 at 21:59

44 votes

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What is larger -- the set of all positive even numbers, or the set of all positive integers?

answered Jul 21, 2010 at 23:32

44 votes

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How was the Monster's existence originally suspected?

answered Aug 20, 2012 at 3:30

37 votes

Order of nontrivial elements is 2 implies Abelian group

answered Jan 11, 2013 at 1:45

29 votes

"The Egg:" Bizarre behavior of the roots of a family of polynomials.

answered Oct 8, 2012 at 10:27

28 votes

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What exactly does it mean for a function to be "well-behaved"?

answered Jul 21, 2010 at 4:19

26 votes

Are the "proofs by contradiction" weaker than other proofs?

answered Jul 21, 2010 at 3:31

26 votes

What is the single most influential book every mathematician should read?

answered Jul 21, 2010 at 5:47

24 votes

Why is $x^0 = 1$ except when $x = 0$?

answered Jul 20, 2010 at 21:40

24 votes

Importance of Representation Theory

answered Jul 24, 2010 at 13:08

23 votes

Why does the series $\sum_{n=1}^\infty\frac1n$ not converge?

answered Jul 21, 2010 at 5:28

22 votes

Do complex numbers really exist?

answered Jul 20, 2010 at 22:21

17 votes

How do you prove that a group specified by a presentation is infinite?

answered Jul 23, 2010 at 20:15

15 votes

How to write \mathcal letters by hand?

answered Nov 13, 2012 at 12:18

14 votes

Does it ever make sense NOT to go to the most prestigious graduate school you can get into?

answered Nov 3, 2010 at 22:59

13 votes

What are some applications of these specific pure math areas?

answered Sep 27, 2017 at 14:44

12 votes

Is $n \sin n$ dense on the real line?

answered Oct 25, 2012 at 22:06

12 votes

Intuition for uniform continuity of a function on $\mathbb{R}$

answered Nov 23, 2010 at 17:20

12 votes

What is the Riemann-Zeta function?

answered Jul 23, 2010 at 16:13

11 votes

Generators of a free group

answered Dec 19, 2010 at 5:08

10 votes

Accepted

exercise in Isaacs's book on Character Theory

answered Sep 25, 2011 at 17:06

9 votes

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Is dualizablility of an object equivalent to tensoring with that object having a left adjoint?

answered Feb 27, 2014 at 5:37

8 votes

Complex conjugate of $z$ without knowing $z=x+i y$

answered Mar 24, 2011 at 5:44

8 votes

Are the "proofs by contradiction" weaker than other proofs?

answered Jul 21, 2010 at 3:28

7 votes

Intuitive understanding of the derivatives of $\sin x$ and $\cos x$

answered Jul 21, 2010 at 23:03

7 votes

Transformations of domino tilings

answered May 1, 2011 at 5:10

7 votes

is this expression $O(n^2)$ or $O(n^3)$?

answered Dec 8, 2010 at 1:52

6 votes

Accepted

Confusion about unique isomorphism $M \otimes N \to N \otimes M$

answered Jun 8, 2012 at 15:50

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61 Answers

Is it true that $0.999999999\ldots=1$?

What Does it Really Mean to Have Different Kinds of Infinities?

Why is $1$ not a prime number?

What is larger -- the set of all positive even numbers, or the set of all positive integers?

How was the Monster's existence originally suspected?

Order of nontrivial elements is 2 implies Abelian group

"The Egg:" Bizarre behavior of the roots of a family of polynomials.

What exactly does it mean for a function to be "well-behaved"?

Are the "proofs by contradiction" weaker than other proofs?

What is the single most influential book every mathematician should read?

Why is $x^0 = 1$ except when $x = 0$?

Importance of Representation Theory

Why does the series $\sum_{n=1}^\infty\frac1n$ not converge?

Do complex numbers really exist?

How do you prove that a group specified by a presentation is infinite?

How to write \mathcal letters by hand?

Does it ever make sense NOT to go to the most prestigious graduate school you can get into?

What are some applications of these specific pure math areas?

Is $n \sin n$ dense on the real line?

Intuition for uniform continuity of a function on $\mathbb{R}$

What is the Riemann-Zeta function?

Generators of a free group

exercise in Isaacs's book on Character Theory

Is dualizablility of an object equivalent to tensoring with that object having a left adjoint?

Complex conjugate of $z$ without knowing $z=x+i y$

Are the "proofs by contradiction" weaker than other proofs?

Intuitive understanding of the derivatives of $\sin x$ and $\cos x$

Transformations of domino tilings

is this expression $O(n^2)$ or $O(n^3)$?

Confusion about unique isomorphism $M \otimes N \to N \otimes M$