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Fedya's user avatar
Fedya
  • Member for 10 years, 2 months
  • Last seen more than a week ago
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answer
21
Rational homotopy groups of $S^2\vee S^2$
Jun 16, 2021
question
14
Whitehead products in homotopy groups of spheres
Nov 13, 2018
question
7
Is the following module over a group ring necessarily infinitely generated?
Oct 9, 2014
answer
7
A homeomorphism with a prescribed action on the fundamental group - decidable or not?
Aug 9, 2017
answer
6
Unknotting algorithm in higher dimensions?
Apr 29, 2020
answer
6
Triangulation of a simplex
Oct 21, 2021
question
4
Coefficients in Hilbert's tenth problem over number rings: do they matter?
Mar 16, 2022
answer
4
Local complexity of triangulations
Dec 24, 2020
question
3
How does the minimal size of a rational solution to a system of polynomial equations depend on parameters?
Nov 4, 2017
answer
3
A variant of $\ell^2$-cochains
Aug 14, 2017