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J.K.T.'s user avatar
J.K.T.'s user avatar
J.K.T.
  • Member for 11 years, 3 months
  • Last seen more than a month ago
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Top posts
question
9
Is the Whitehead bracket $\pi_{p}(X)\otimes \pi_{q}(Y)\to \pi_{p+q-1}(X\vee Y)$ injective?
Mar 1
question
8
Non-triviality of Whitehead products in wedges of CW-complexes
Jan 2
question
7
Visualizing a Whitehead product: the attaching map $S^3\to S^2\vee S^2$
Jun 15, 2019
question
6
The homotopy class of the loop $(S^1,\ast)\to (\Omega^2(S^2),\operatorname{id}_{S^2})$ that rotates the sphere
May 27, 2021
question
3
The group of sequences in $G^{\mathbb{N}}$ that converge to $(0,0,0,\dots)$
Feb 6, 2021
question
3
Injectivity of certain homomorphisms on free groups
Nov 11, 2021
question
2
Separating a certain planar region with an open set
Aug 13, 2020
question
2
Cotorsion-freeness in uncountable products of abelian groups
Mar 19, 2021
Top network posts
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27
Countable compact spaces as ordinals
16
How do you find the smallest of homeomorphic ordinals?
16
Separation in direct limits of closed inclusions
12
Is every countable space first countable?
7
Can you give me an example of a non compact topological space with compact dense subset?