M. K.

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visits member for 2 years
seen Feb 27 '13 at 5:05

Nov
18
revised A rational curve on projective complex surfaces.
added 1 characters in body
Nov
18
asked A rational curve on projective complex surfaces.
Nov
18
comment Algebraic definition of blow-ups
You are right. I'll fixe the typo. Thanks.
Nov
18
asked Algebraic definition of blow-ups
Nov
18
comment A question on elliptic fibration of K3 surfaces.
Yes, is means a proper flat morphism.
Nov
17
comment Algebraic classes in Hodge decomposition.
Thanks for the answer. It is not so trivial after all.
Nov
17
accepted Algebraic classes in Hodge decomposition.
Nov
17
asked Algebraic classes in Hodge decomposition.
Nov
17
asked A question on elliptic fibration of K3 surfaces.
Nov
12
accepted Good textbooks for lattice and coding theory
Nov
12
accepted Kaehler-Einstein metric on Calabi-Yau manifold
Nov
12
comment Why is any rank $1$ sheaf always stable?
@QiL You are right. Thank you for pointing this out.
Nov
12
accepted Why is any rank $1$ sheaf always stable?
Nov
11
asked Why is any rank $1$ sheaf always stable?
Nov
10
comment A question on a linear system on a complex surface.
Thank you for the answer.
Nov
10
accepted A question on a linear system on a complex surface.
Nov
5
asked What is bivariant Chow group?
Nov
4
comment Trace map $Ext^i(E,E)\rightarrow H^i(X,O_X)$
Well, determinant of module over noncommutative ring does not make much sense, but I want to know if there is any good interpretation.
Nov
4
comment Trace map $Ext^i(E,E)\rightarrow H^i(X,O_X)$
Thank you for your kind answer, Mariano :) I also heard that traceless Ext are related to deformation of sheaves with fixed determinant. Does noncommutative case have a similar description?
Nov
4
comment Trace map $Ext^i(E,E)\rightarrow H^i(X,O_X)$
In noncommutative case, where is the range of the map?