Timeline for Which rings are subrings of matrix rings?
Current License: CC BY-SA 4.0
8 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| May 12, 2018 at 17:08 | history | edited | Luc Guyot | CC BY-SA 4.0 |
Latexified
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| Nov 28, 2009 at 19:16 | answer | added | Hailong Dao | timeline score: 6 | |
| Nov 9, 2009 at 21:07 | comment | added | Kevin Buzzard | I should add two things: 1) as I forgot to say, but as David guessed, yes I want the map from T to the endomorphism ring to be an A-algebra homomorphism. 2) David's first counterexample made me realise that really I am only interested in the case where A is regular, and in fact probably only in the case where A is a power series ring in finitely many variables over a field of characteristic zero. | |
| Nov 9, 2009 at 20:41 | answer | added | David E Speyer | timeline score: 4 | |
| Nov 2, 2009 at 10:31 | vote | accept | Kevin Buzzard | ||
| Oct 30, 2009 at 3:33 | answer | added | David E Speyer | timeline score: 10 | |
| Oct 30, 2009 at 2:18 | comment | added | David E Speyer | The obvious guess is "always". I realize that the obvious proof (consider T acting on itself) doesn't work. However, do you have any reason to believe this is not the correct answer? | |
| Oct 29, 2009 at 15:14 | history | asked | Kevin Buzzard | CC BY-SA 2.5 |