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visits member for 2 years, 4 months
seen Mar 7 '13 at 1:40

Jul
2
awarded  Curious
Apr
23
awarded  Nice Question
Apr
16
awarded  Yearling
Feb
18
asked Why is the mirror of rigid Calabi-Yau threefold singularity theory?
Feb
18
comment Lifting a birational map of $X/G$ to a birational map of $X$?
Thank you for the answer, Tom. I now think my claim is positive although I cannot prove it. I will post something once I am convinced with my idea.
Feb
8
revised Lifting a birational map of $X/G$ to a birational map of $X$?
edited body
Feb
8
comment Lifting a birational map of $X/G$ to a birational map of $X$?
Haha, I fix the typo. Thanks.
Feb
8
asked Lifting a birational map of $X/G$ to a birational map of $X$?
Feb
1
comment When does $Aut(X)=Bir(X)$ hold?
I see. Thank you for clarifying the point.
Feb
1
comment When does $Aut(X)=Bir(X)$ hold?
Thank you for the useful comments. Do you know anything about Calabi-Yau case? K3 surface is minimal and thus the equality holds (thanks to Christian'sanswer below). What about dimension 3 case?
Feb
1
comment When does $Aut(X)=Bir(X)$ hold?
Sorry for a (potentially) stupid question, but could you give me an example of compact $X$ such that $Bir(X)\ne Bim(X)$?
Feb
1
comment When does $Aut(X)=Bir(X)$ hold?
Thanks. I will take a look at it.
Jan
31
awarded  Commentator
Jan
31
comment When does $Aut(X)=Bir(X)$ hold?
Thank you for the example, Piotr. Do you know how to prove the fact about Abelian varieties?
Jan
31
asked When does $Aut(X)=Bir(X)$ hold?
Jan
4
revised A question on the “natural metric” on the space of Bridgeland stability condition
added 106 characters in body
Jan
3
comment A question on the “natural metric” on the space of Bridgeland stability condition
Thank you for the answer, Sasha. Logarithm part now makes sense to me. But I am not totally convinced by the phase part yet. I will think about it more.
Jan
2
comment A question on the “natural metric” on the space of Bridgeland stability condition
@Angelo It seems you can type the explicit equation. I would appreciate your edit.
Jan
2
comment A question on the “natural metric” on the space of Bridgeland stability condition
I cannot write down the natural metric on this post. THe equation does not appear well. So I put a link to a paper by Bridgeland.
Jan
2
revised A question on the “natural metric” on the space of Bridgeland stability condition
deleted 325 characters in body