Timeline for An example of a local ring which is not CM and a MCM module over it
Current License: CC BY-SA 4.0
3 events
| when toggle format | what | by | license | comment | |
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| Nov 29, 2018 at 22:14 | answer | added | Neil Epstein | timeline score: 3 | |
| Nov 29, 2018 at 14:16 | comment | added | Jason Starr | Let $A$ be the local ring of a union of two $2$-planes intersecting in one point $x$ in a $4$-dimensional ambient space. Let $M$ be the local ring of one of the two irreducible components. Let $p$ be a prime ideal of a curve in the other component that contains $x$. If you really want $A$ to be not Cohen-Macaulay at $p$, then just add some embedded structure to $A$ along $p$. | |
| Nov 29, 2018 at 10:42 | history | asked | General Journal | CC BY-SA 4.0 |