Timeline for Blowdown and contraction
Current License: CC BY-SA 3.0
9 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Dec 13, 2020 at 4:21 | comment | added | Fei YE | For Q1, I think the point under the contraction should be normal by Stein factorization. | |
| Mar 8, 2014 at 10:42 | history | edited | David C | CC BY-SA 3.0 |
added 91 characters in body
|
| Mar 4, 2014 at 11:54 | comment | added | Donu Arapura | Your new Q2 should be fine. What sort of answer do you want for Q1? | |
| Mar 3, 2014 at 18:08 | history | edited | David C | CC BY-SA 3.0 |
added 526 characters in body
|
| Mar 3, 2014 at 17:28 | comment | added | David C | I am sorry, my knowledge of algebraic geometry is very very elementary. I hope that the question sounds better now. | |
| Mar 3, 2014 at 17:27 | history | edited | David C | CC BY-SA 3.0 |
deleted 276 characters in body
|
| Mar 3, 2014 at 17:13 | comment | added | abx | Donu is right, you can contract only divisors which are negative in some sense. For instance you can contract an irreducible curve $C$ on a smooth projective surface iff $C^2<0$. | |
| Mar 3, 2014 at 17:10 | comment | added | Donu Arapura | I think you have the wrong sign, very ample divisors are not (birationally) contractible. | |
| Mar 3, 2014 at 16:59 | history | asked | David C | CC BY-SA 3.0 |