User Henry Cohn

139 votes

Why do Bernoulli numbers arise everywhere?

answered Apr 11, 2011 at 3:11

88 votes

Accepted

How fast can we really multiply matrices?

answered Jul 6, 2012 at 21:43

77 votes

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What would be some major consequences of the inconsistency of ZFC?

answered Mar 11, 2012 at 5:39

66 votes

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The gimbal lock shows up in my quaternions

answered May 3, 2012 at 19:42

61 votes

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How to explain the concentration-of-measure phenomenon intuitively?

answered Jun 27, 2015 at 20:55

60 votes

Accepted

How closed-form conjectures are made?

answered May 23, 2013 at 4:29

59 votes

What items MUST appear on a mathematician's CV?

answered Oct 26, 2011 at 15:56

48 votes

Accepted

When does symmetry in an optimization problem imply that all variables are equal at optimality?

answered Mar 18, 2011 at 0:08

47 votes

Resources for mathematics advising.

answered Apr 26, 2011 at 4:44

44 votes

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Evidence for integer factorization is in $P$

answered Oct 28, 2011 at 14:15

43 votes

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Understanding sphere packing in higher dimensions

answered Apr 5, 2016 at 14:39

37 votes

What happened to online articles published in K-theory (Springer journal)?

answered Jul 12, 2013 at 2:35

36 votes

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Is there a "mathematical" definition of "simplify"?

answered Apr 4, 2013 at 14:19

34 votes

Accepted

Optimal sphere packings ==> Thinnest ball coverings?

answered Oct 7, 2016 at 15:01

32 votes

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How should an analytic number theorist look at Bessel functions?

answered Aug 30, 2012 at 20:28

30 votes

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Which hard mathematical problems do you have to solve to earn bitcoins ?

answered Apr 20, 2013 at 3:53

25 votes

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Does Peano's theorem apply to spaces with infinite dimension?

answered Apr 18, 2014 at 4:09

24 votes

Best known bounds on tensor rank of matrix multiplication of 3×3 matrices

answered Dec 6, 2013 at 21:06

24 votes

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Dense sphere packings which are not lattice packings

answered Apr 7, 2011 at 12:22

23 votes

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Do you use the Mathematics Subject Classification (MSC) when searching for literature?

answered May 11, 2012 at 16:21

22 votes

What is the largest possible thirteenth kissing sphere?

answered Apr 21, 2012 at 17:02

22 votes

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Niemeier lattices and theta functions

answered Apr 18, 2011 at 1:25

21 votes

Accepted

Is there a fast way to compute matrix multiplication mod $p$?

answered Apr 23, 2011 at 16:49

21 votes

Unit fraction, equally spaced denominators not integer

answered Dec 19, 2013 at 2:09

21 votes

Accepted

Could this unexpected bias in the distribution of consecutive primes have any impact on the security of encryption algorithms?

answered Mar 14, 2016 at 18:13

20 votes

Accepted

Can the Legendre symbol be calculated in polynomial time?

answered May 24, 2014 at 14:18

20 votes

Deep theorems and long proofs

answered Nov 17, 2013 at 3:52

20 votes

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Are isospectral manifolds necessarily homeomorphic?

answered May 16, 2012 at 4:30

20 votes

Accepted

Encrypting a message for multiple recipients

answered Apr 18, 2011 at 12:08

20 votes

Accepted

covering by spherical caps

answered Jun 12, 2011 at 15:39

Stack Exchange Network

88 Answers

Why do Bernoulli numbers arise everywhere?

How fast can we really multiply matrices?

What would be some major consequences of the inconsistency of ZFC?

The gimbal lock shows up in my quaternions

How to explain the concentration-of-measure phenomenon intuitively?

How closed-form conjectures are made?

What items MUST appear on a mathematician's CV?

When does symmetry in an optimization problem imply that all variables are equal at optimality?

Resources for mathematics advising.

Evidence for integer factorization is in $P$

Understanding sphere packing in higher dimensions

What happened to online articles published in K-theory (Springer journal)?

Is there a "mathematical" definition of "simplify"?

Optimal sphere packings ==> Thinnest ball coverings?

How should an analytic number theorist look at Bessel functions?

Which hard mathematical problems do you have to solve to earn bitcoins ?

Does Peano's theorem apply to spaces with infinite dimension?

Best known bounds on tensor rank of matrix multiplication of 3×3 matrices

Dense sphere packings which are not lattice packings

Do you use the Mathematics Subject Classification (MSC) when searching for literature?

What is the largest possible thirteenth kissing sphere?

Niemeier lattices and theta functions

Is there a fast way to compute matrix multiplication mod $p$?

Unit fraction, equally spaced denominators not integer

Could this unexpected bias in the distribution of consecutive primes have any impact on the security of encryption algorithms?

Can the Legendre symbol be calculated in polynomial time?

Deep theorems and long proofs

Are isospectral manifolds necessarily homeomorphic?

Encrypting a message for multiple recipients

covering by spherical caps