Noah Snyder

Bloomington, Indiana

http://sbseminar.wordpress.com

Associate Professor at Indiana University, working on tensor categories and their relationships to operator algebras and topology.

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What is "ultrafinitism" and why do people believe it?

soft-question philosophy constructive-mathematics asked Jul 23, 2010 at 3:20

math.stackexchange.com

59 votes

Why are the only associative division algebras over the real numbers the real numbers, the complex numbers, and the quaternions?

quaternions ring-theory abstract-algebra asked Jul 23, 2010 at 3:11

math.stackexchange.com

38 votes

How do you define (infinity,1) categories in Homotopy Type Theory?

ct.category-theory higher-category-theory homotopy-type-theory asked Oct 24, 2013 at 19:11

mathoverflow.net

38 votes

Is there a "simplification" functor in algebraic topology?

at.algebraic-topology homotopy-theory asked Jan 8, 2015 at 22:10

mathoverflow.net

33 votes

Nilpotence of the stable Hopf map via framed cobordism

at.algebraic-topology gt.geometric-topology stable-homotopy cobordism asked Mar 31, 2015 at 12:47

mathoverflow.net

31 votes

Are the higher homotopy groups of the Hawaiian earring trivial?

at.algebraic-topology homotopy-theory asked Apr 20, 2014 at 1:12

mathoverflow.net

28 votes

Highly transitive groups (without assuming the classification of finite simple groups)

gr.group-theory finite-groups cfsg-free asked Nov 18, 2009 at 19:02

mathoverflow.net

27 votes

Are there two groups which are categorically Morita equivalent but only one of which is simple

ct.category-theory fusion-categories gr.group-theory finite-groups asked Oct 29, 2009 at 18:27

mathoverflow.net

26 votes

Does the quantum subgroup of quantum su_2 called E_8 have anything at all to do with the Lie algebra E_8?

qa.quantum-algebra quantum-groups fusion-categories ade-classifications lie-algebras asked Jul 19, 2010 at 1:06

mathoverflow.net

22 votes

Technical issue in the approach to Lie groups taken in a book

gr.group-theory lie-groups teaching asked Jan 26, 2016 at 21:15

mathoverflow.net

Top Answers

436

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

math.stackexchange.com

211

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

math.stackexchange.com

138

What's the "best" proof of quadratic reciprocity?

mathoverflow.net

130

My teaching evaluations arrived and female students statistically gave me worse scores than male students. Is there any possible explanation?

academia.stackexchange.com

123

First year Math PhD student; My problem solving skill has been completely atrophied and continues to decline

academia.stackexchange.com

118

Is it rude to call a professor by their last name with no prefix in a non-academic setting?

academia.stackexchange.com

Can I write a referee report too fast?

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What is the oldest open problem in mathematics?

mathoverflow.net

How can I decline the request to help a fellow student cheat?

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Why are characters so well-behaved?

mathoverflow.net

Is it bad to finish your talk early at conferences?

academia.stackexchange.com

Forgetting what you have published

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Inaccessible cardinals and Andrew Wiles's proof

mathoverflow.net

Are athletes' college degrees discounted by employers and graduate school admissions?

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Which is the correct version of a quantum group at a root of unity?

mathoverflow.net

Should academic papers necessarily carry a sober tone?

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I feel like my mathematical competence is fading

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Is there a way to improve my grade after graduation?

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Why don't all disciplines follow a double-blind review system?

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Is this psychological abuse? Should I switch supervisors?

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How many times did terrestrial life emerge from the ocean?

biology.stackexchange.com

What precisely Is "Categorification"?

mathoverflow.net

Color CV vs black and white CV

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Is St. Petersburg a good place for the 2022 Int. Congress of Mathematicians

mathoverflow.net

What does it take to run a good learning seminar?

mathoverflow.net

When and how is it appropriate for an undergraduate to email a professor out of the blue?

mathoverflow.net

Can I ask my supervisor how long would it take to complete my PhD before beginning my PhD studies and post getting acceptance letter?

academia.stackexchange.com

What is the advantage of becoming a full professor if you already have tenure as an associate professor?

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Why is Howard University still predominantly black?

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Why is $1$ not a prime number?

math.stackexchange.com