Greg Kuperberg's user avatar
Greg Kuperberg's user avatar
Greg Kuperberg's user avatar
Greg Kuperberg
  • Member for 14 years, 5 months
  • Last seen this week
26 votes

What exactly is the relationship between codes over finite fields and Euclidean sphere-packings?

25 votes
Accepted

Real analysis has no applications?

25 votes

In what ways is physical intuition about mathematical objects non-rigorous?

25 votes

How to respond to "I was never much good at maths at school."

25 votes

Which small finite simple groups are not yet known to be Galois groups over Q?

25 votes

How to escape the inclination to be a universalist or: How to learn to stop worrying and do some research.

24 votes

Are there any very hard unknots?

24 votes
Accepted

Can Gröbner bases be used to compute solutions to large, real-world problems?

24 votes
Accepted

Characteristic classes of sphere bundles over spheres in terms of clutching functions

24 votes

Careers advice for Ph.D.s without current postdocs or university jobs

24 votes
Accepted

Homotopies of triangulations

23 votes
Accepted

Universal Covering Space of Wedge Products

23 votes

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

23 votes
Accepted

Smooth bijection between non-diffeomorphic smooth manifolds?

22 votes
Accepted

Abelianization of a semidirect product

22 votes
Accepted

Why the choice of the simplex for defining homology?

22 votes

Definition of "simplicial complex"

22 votes

When does a subgroup H of a group G have a complement in G?

22 votes
Accepted

Are supervector spaces the representations of a Hopf algebra?

22 votes
Accepted

Riemannian metrics on non-paracompact manifolds

22 votes
Accepted

Has a conjugation of SL2(Z) finite index in SL2(Z)? (Modular group)

21 votes

What is the best way explain to undergraduates that all 1-dimensional manifolds are orientable?

21 votes

On a Conjecture of Schinzel and Sierpinski

21 votes
Accepted

What is the conceptual significance of supercommutativity?

21 votes

Are there piecewise-linear unknots that are not metrically unknottable?

21 votes

Noether's theorem in quantum mechanics

21 votes

Geometric imagination of differential forms

20 votes

What are your favorite finite non-commutative rings?

20 votes

Can skeleta simplify category theory?

20 votes

Cocktail party math

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