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awarded  Popular Question 
Jul 2 
awarded  Curious 
Apr 23 
awarded  Nice Question 
Apr 16 
awarded  Yearling 
Feb 18 
asked  Why is the mirror of rigid CalabiYau 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 CalabiYau 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. 