Top network posts

• 25 For $x$ irrational, is $a_{n} =\sum_{k=1}^{n}(-1)^{⌊kx⌋}$ unbounded?
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• 15 If the center of a finite group is trivial, are there two elements whose centralizers intersect trivially?
• 12 Is homeomorphism of simplicial complexes semidecidable?
• 12 Does the Angel have to be really smart?
• 12 Homeomorphisms and "mod finite"
• 11 Can matrices over $F[G]$ have infinite order when $G$ is periodic?
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