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JK34
  • Member for 5 years
  • Last seen more than 4 years ago
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question
8
What is known about homotopy groups of spheres?
May 3, 2020
answer
5
An intuitive explanation for group cohomology via cochains?
Nov 23, 2019
question
4
Reference request for a calculation of a Toda-bracket of spheres
Nov 20, 2019
answer
2
Does a homeomorphism of open cones restrict to a quotient map of the bases?
Nov 23, 2019
question
1
Give a null-homotopy of $2\eta :S^4\to S^3$ in coordinates
Nov 18, 2019