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Henry Cohn

Cambridge, MA

http://math.mit.edu/~cohn

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Top Questions
Top Answers
134
Why do Bernoulli numbers arise everywhere?
mathoverflow.net

73
How fast can we *really* multiply matrices?
mathoverflow.net

65
The gimbal lock shows up in my quaternions
mathoverflow.net

65
What would be some major consequences of the inconsistency of ZFC?
mathoverflow.net

59
How closed-form conjectures are made?
mathoverflow.net

55
How to explain the concentration-of-measure phenomenon intuitively?
mathoverflow.net

53
What items MUST appear on a mathematician's CV?
mathoverflow.net

45
Resources for mathematics advising.
mathoverflow.net

40
Understanding sphere packing in higher dimensions
mathoverflow.net

40
Can a pre-calculus student prove this?
math.stackexchange.com

40
When does symmetry in an optimization problem imply that all variables are equal at optimality?
mathoverflow.net

40
Evidence for integer factorization is in $P$
mathoverflow.net

37
What happened to online articles published in K-theory (Springer journal)?
mathoverflow.net

35
Is there a “mathematical” definition of “simplify”?
mathoverflow.net

32
Optimal sphere packings ==> Thinnest ball coverings?
mathoverflow.net

32
How should an analytic number theorist look at Bessel functions?
mathoverflow.net

27
Which hard mathematical problems do you have to solve to earn bitcoins ?
mathoverflow.net

23
Dense sphere packings which are not lattice packings
mathoverflow.net

23
Best known bounds on tensor rank of matrix multiplication of 3×3 matrices
mathoverflow.net

22
I would like to have a counter example that Peano's theorem does not apply to spaces with infinite dimension
mathoverflow.net

22
What is the largest possible thirteenth kissing sphere?
mathoverflow.net

21
Niemeier lattices and theta functions
mathoverflow.net

20
covering by spherical caps
mathoverflow.net

20
Could this unexpected bias in the distribution of consecutive primes have any impact on the security of encryption algorithms?
mathoverflow.net

20
Can the Legendre symbol be calculated in polynomial time?
mathoverflow.net

20
Deep theorems and long proofs
mathoverflow.net

20
Do you use the Mathematics Subject Classification (MSC) when searching for literature?
mathoverflow.net

20
Encrypting a message for multiple recipients
mathoverflow.net

19
Is there a fast way to compute matrix multiplication mod $p$?
mathoverflow.net

19
Unit fraction, equally spaced denominators not integer
mathoverflow.net

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