Timeline for Deformation to the normal cone
Current License: CC BY-SA 2.5
9 events
| when toggle format | what | by | license | comment | |
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| Aug 26, 2013 at 20:01 | answer | added | AFK | timeline score: 3 | |
| Mar 1, 2011 at 18:01 | comment | added | AFK | Added a few questions | |
| Mar 1, 2011 at 18:00 | history | edited | AFK | CC BY-SA 2.5 |
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| Mar 1, 2011 at 5:33 | comment | added | Allen Knutson | In my experience, from playing with the Rees algebras, no two degenerations like these ever nonobviously match. :( | |
| Mar 1, 2011 at 1:32 | comment | added | AFK | I don't know the universal property of the deformation space so I tried to deal with the Rees Algebras. From what I've worked out, it seems that the bigradings aren't the same. Perhaps I'm looking at the wrong projection $D_{A_2} D_{A_1} X \to X \times \mathbb{A}^2$. | |
| Mar 1, 2011 at 0:45 | comment | added | David E Speyer | Have you worked out the example where $X$ is $\mathbb{C}^3$, with $A_1=\{ x=y=0 \}$ and $A_2 = \{ y=z=0 \}$? That's the standard example of two blowups not commuting. I've been meaning to do it for you, but it doesn't look like I'll get to it. | |
| Feb 28, 2011 at 15:25 | history | edited | AFK | CC BY-SA 2.5 |
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| Feb 28, 2011 at 15:01 | history | edited | AFK | CC BY-SA 2.5 |
added 9 characters in body; added 4 characters in body
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| Feb 28, 2011 at 13:53 | history | asked | AFK | CC BY-SA 2.5 |