Timeline for Dual of a projective module
Current License: CC BY-SA 4.0
6 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Feb 20, 2020 at 23:07 | vote | accept | Fofi Konstantopoulou | ||
| Feb 20, 2020 at 23:07 | comment | added | Fofi Konstantopoulou | I think that clears it up - thanks! | |
| Feb 20, 2020 at 22:58 | comment | added | Leonid Positselski | I've added a paragraph at the end of the answer which is relevant to your question in the comment. Yes, this is the difference between the left and right duals. | |
| Feb 20, 2020 at 22:56 | history | edited | Leonid Positselski | CC BY-SA 4.0 |
a paragraph added at the end
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| Feb 20, 2020 at 22:52 | comment | added | Fofi Konstantopoulou | Thanks for the answer. But it seems that $Q \otimes_R P$ is well defined as a $\mathbb{Z}$-module. So is the issue here that $Q = \,_R\mathrm{Hom}$ is really a "right dual" for $P$ and not a "left dual"? (Here I mean right and left dual in rough analogy with the monoidal category sense.) | |
| Feb 20, 2020 at 22:38 | history | answered | Leonid Positselski | CC BY-SA 4.0 |