bio | website | |
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location | ||
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visits | member for | 2 years, 1 month |
seen | Mar 23 at 2:39 | |
stats | profile views | 307 |
I am a math PhD student and interested in many things: (non-commutative) algebraic geometry, arithmetic geometry and mathematical physics
Mar 1 |
comment |
Non-separatedness of moduli space of sheaves
It seems to me that graded quotients (with obvious filtration) of the two bundles are different. One consists of two $\mathcal{O}$ and the other consists of $\mathcal{O}(-1)$ and $\mathcal{O}(1)$. |
Mar 1 |
accepted | Non-separatedness of moduli space of sheaves |
Mar 1 |
asked | Non-separatedness of moduli space of sheaves |
Feb 24 |
accepted | How to obtain $Z(\Sigma_f)=\text{Trace}\ \Sigma(f)$ in TQFT? |
Feb 24 |
comment |
How to obtain $Z(\Sigma_f)=\text{Trace}\ \Sigma(f)$ in TQFT?
Thank you very much, abx! |
Feb 24 |
comment |
How to obtain $Z(\Sigma_f)=\text{Trace}\ \Sigma(f)$ in TQFT?
Can I ask why your paring is the natural one? |
Feb 24 |
comment |
How to obtain $Z(\Sigma_f)=\text{Trace}\ \Sigma(f)$ in TQFT?
Thanks for the answer, but I don't understand the last sentence. Where did you use the associativity axiom and how did you get the trace? |
Feb 24 |
asked | How to obtain $Z(\Sigma_f)=\text{Trace}\ \Sigma(f)$ in TQFT? |
Feb 22 |
awarded | Yearling |
Dec 17 |
comment |
Explicit examples presheaves associated to higher direct images which fail to be sheaves
As to the first case, why don't the local sections glue to a global one? What's wrong with $H^1(X,\mathbb{Z})$? |
Dec 5 |
awarded | Nice Question |
Nov 3 |
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How to determine $O(L)$ is finite or not?
You are right. $2$ should be $k$ in the comment above. Thank you for the clarification. |
Nov 3 |
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How to determine $O(L)$ is finite or not?
I thought any automorphism of $U(k)$ is induced by that of $U$. Am I wrong? |
Nov 3 |
comment |
How to determine $O(L)$ is finite or not?
Sorry for the confusion. I denote by $U(k)$ the hyperbolic lattice mulptiplied by $k$. So there are basis $e,f$ with $e^2=f^2=(e,f)-2=0$. |
Nov 2 |
comment |
How to determine $O(L)$ is finite or not?
Isn't $O(U(K)))$ finite? |
Oct 31 |
comment |
How to determine $O(L)$ is finite or not?
Do you mean $U(k)$ by the hyperbolic plane? |
Sep 4 |
revised |
Classification of involutions of the lattice $H\oplus H(k)^{\oplus2}$ for $k=5,6$?
added 24 characters in body; edited tags |
Sep 1 |
asked | Moduli space of K3 surfaces and Bogomolov-Tian-Todorov theorem |
Aug 31 |
revised |
Classification of involutions of the lattice $H\oplus H(k)^{\oplus2}$ for $k=5,6$?
added 70 characters in body |
Aug 31 |
asked | Classification of involutions of the lattice $H\oplus H(k)^{\oplus2}$ for $k=5,6$? |