Timeline for Run MMP between varieties of isomorphic in codimension 1
Current License: CC BY-SA 3.0
7 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Nov 9, 2014 at 1:25 | vote | accept | Li Yutong | ||
| Nov 9, 2014 at 1:25 | comment | added | Li Yutong | Beautiful!!! I understand it now. Thank you very very much!!! | |
| Nov 8, 2014 at 23:37 | comment | added | user47305 | If $X$ is minimal, then any $K_X+H'$ contraction is of an $H'$-negative ray (since $K_X$ nef). But $H'$ has codimension $2$ base locus since it's the strict transform of an ample under a small modification. So a $K_X+H'$-contraction must be flipping. (Again if $X$ isn't minimal this is false.) | |
| Nov 8, 2014 at 20:17 | comment | added | Li Yutong | Yes, assume the singularity is good ($X,Y$ are lc, and make a small multiple of $H'$ etc.), then why there is no divisorial/fibre contraction? (I don't understand why $X$ is minimal is used here) | |
| Nov 8, 2014 at 20:15 | history | edited | user47305 | CC BY-SA 3.0 |
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| Nov 8, 2014 at 20:03 | history | edited | user47305 | CC BY-SA 3.0 |
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| Nov 8, 2014 at 19:25 | history | answered | user47305 | CC BY-SA 3.0 |