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Feb
3
answered Classifying two-faces of four-polytopes
Feb
3
awarded  Nice Answer
Feb
2
awarded  Nice Answer
Feb
2
revised Examples of major theorems with very hard proofs that have NOT dramatically improved over time
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Jan
31
comment realization spaces of 3-dimensional polytopes
(But it sounds too good to be true...)
Jan
31
comment Proposals for polymath projects
Dear Vasselin, Hmm, that's very interesting. Maybe it is interesting to demonstrate the question even based on GRH. I supposed it is easier to show that positive fraction of primes divides $2^n+5$ than that for a positive fraction of them 2 is a primitive root of unity. We can also relax the question by perhaps looking at $2^n + x$ where we let $x$ ranges over an interval (depending on n) to make it easier. But in view of your comments maybe this is not a good polymath question.
Jan
31
comment Examples of common false beliefs in mathematics
Thank you, Maxime!
Jan
31
revised Proposals for polymath projects
update: polymath11
Jan
31
comment Proposals for polymath projects
Thanks, V. for the good (but short lived) comments. Since this is not in my area I am not sure at all it is a good question. I realize it is very difficult but my uneducated hunch is that it is not hopeless and potentially fruitful.
Jan
29
answered “Database” of simplicial polytopes/spheres
Jan
29
comment What polytope is this? Bounded sums with choice of coefficients
Dear Brendan, it looks like a relative of the "hypersimplex" (in this case) the convex hull of centers of edges of a simplex. (More generally, centers of $k$-faces.)
Jan
29
revised Tverberg partitions with less than (r-1)(d+1)+1 points
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Jan
29
awarded  Great Answer
Jan
29
revised Tverberg partitions with less than (r-1)(d+1)+1 points
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Jan
29
answered Proposals for polymath projects
Jan
25
awarded  Popular Question
Jan
17
awarded  Nice Answer
Jan
15
awarded  Nice Answer
Jan
13
awarded  Necromancer
Jan
12
revised Proposals for polymath projects
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