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Mathematics
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shin chan's user avatar
shin chan's user avatar
shin chan
  • Member for 4 years, 7 months
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3
Are all indecomposable $\mathbb{Z}_+$-modules over the character ring of a group, character rings of a subgroup?
Jun 17, 2023
question
3
Modified version of Conway's Game of Life, ratio of alive cells becomes $\pi$?
Dec 6, 2023
question
2
Mapping cone of double suspension of Hopf map (Hatcher proposition 4L.11)
May 20, 2021
question
2
Are all module categories over the category $\mathrm{Rep}_k(G)$ given by $\mathrm{Rep}_k(H)$ for a subgroup $H\subset G$?
May 11, 2023
question
1
Isomorphism between basic forms on principal bundle and forms on the associated vector bundle?
Jun 12, 2020
question
1
Defining the logarithm of a function
Jun 18, 2020
question
1
Is $\mathbb Q[x,z]$ as a $\mathbb Q[x,y]$-module (with morphism $x\mapsto x$, $y\mapsto xz$) flat?
Oct 6, 2020
question
1
Retraction $D^n\times I\times I\to (S^{n-1}\times I\times I)\cup (D^n\times\{0,1\}\times I)\cup (D^n\times I\times \{0\})$
Nov 3, 2020
question
0
For compact Hausdorff space $X$, prove that $X\setminus\{x_0\}$ is locally compact.
Mar 29, 2020
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0
Homotopy on $S^{n-1}$ extends to homotopy on $D^n$
Nov 2, 2020
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11
Are all indecomposable $\mathbb{Z}_+$-modules over the character ring of a group, character rings of a subgroup?
7
Easy example of a non-symmetric braiding of $\operatorname{Rep}(G)$?