Timeline for The group of $k$-automorphisms of $k[x_1,\ldots,x_n,x_1^{-1}]$
Current License: CC BY-SA 4.0
8 events
| when toggle format | what | by | license | comment | |
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| Mar 11, 2020 at 17:37 | vote | accept | user237522 | ||
| Mar 11, 2020 at 0:51 | history | edited | LSpice | CC BY-SA 4.0 |
Minor proofreading
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| Mar 11, 2020 at 0:13 | answer | added | Johannes Hahn | timeline score: 7 | |
| Mar 10, 2020 at 20:34 | comment | added | user237522 | Thank you for your comment. (You can write it as an answer if you like). | |
| Mar 10, 2020 at 12:37 | comment | added | Johannes Hahn | Your argument for $n=2$ generalises and shows that $x_1$ is always mapped to $\lambda x_1^k$. Therefore if you consider the subring $S:=k[x_1^{\pm 1}]$, a general $k$-linear automorphism of is a composition of a $S$-linear automorphism of $S[x_2,...x_n]$ and an automorphism of $S$ (acting on $S[x_2,...,x_n]$ by acting on coefficients). | |
| Mar 10, 2020 at 7:52 | history | edited | YCor |
edited tags
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| May 12, 2017 at 11:41 | history | migrated | from math.stackexchange.com (revisions) | ||
| May 7, 2017 at 11:07 | history | asked | user237522 | CC BY-SA 3.0 |