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seen Jun 24 '13 at 11:55

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Feb
24
comment A classification of rational surfaces with effective $K$
Sorry, you are absolutely right about the first mistake, my proof is wrong. Anyway, just for the sake of truth, I didn't write that $-K_{X'}$ is ample; but it's not very important
Feb
24
revised A classification of rational surfaces with effective $K$
deleted 14 characters in body
Feb
24
answered A classification of rational surfaces with effective $K$
Jan
18
comment Irreducible divisors containing an arbitrary closed set
Thanks quim (and Simone) for the proof. I choosed Olivier's as best answer, but your answer was very useful to understand that the answer is much closer to Bertini than I expected. I also believe that your (*) should be always true. Maybe, in the case $V_i$ is contained in the singular locus, you can blow-up $V_i$, take an exceptional divisor $E_i$ mapping surjectivly on $V_i$, and take something like an horizontal section of the morphism $E_i \to V_i$.
Jan
18
comment Irreducible divisors containing an arbitrary closed set
Thanks Olivier! I really like this proof!
Jan
18
accepted Irreducible divisors containing an arbitrary closed set
Jan
17
awarded  Citizen Patrol
Jan
17
asked Irreducible divisors containing an arbitrary closed set
Nov
10
comment push-forward and strict transforms
Thanks a lot Karl! Very clear example.
Nov
10
accepted push-forward and strict transforms
Nov
9
asked push-forward and strict transforms
Nov
2
answered nonnef locus and discrete valuation.
Sep
28
comment KLT singularities are quotient in codimension 2
Great! Thanks a lot for your answer!
Sep
28
accepted KLT singularities are quotient in codimension 2
Sep
27
comment KLT singularities are quotient in codimension 2
Yes, I'm considering normal singularities. Would you be so kind to explain me how the result follows from the proposition in Kollar-Mori? Probably it's tivial, but I'm missing something. Thanks a lot!
Sep
27
asked KLT singularities are quotient in codimension 2