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Apr
26 |
accepted | Euler characteristic - reference question |
Apr
26 |
asked | Euler characteristic - reference question |
Apr
26 |
comment |
Cotangent complex of certain dg-scheme
Thanks, I think you are right, except that one must formulate more carefully what "given by dg generators and relations" means (some smoothness condition should be there). |
Apr
22 |
asked | Cotangent complex of certain dg-scheme |
Apr
21 |
revised |
On push-forward of the constant sheaf for fibrations
added 4 characters in body |
Apr
6 |
comment |
On push-forward of the constant sheaf for fibrations
Well, unless you work in an algebraic (or, at least, complex analytic) context, properness is not a sensible condition (almost any nice map is homotopy equivalent to a proper one). |
Apr
6 |
answered | On push-forward of the constant sheaf for fibrations |
Apr
2 |
comment |
Moduli space of (all) vector bundles on $\mathbb{P}^1$
No, in the case of $GL(n)$ the connected components are in one-to-one correspondence with integers. More precisely, isomorphism classes of rank $n$ bundles correspond to $n$-tuples $(k_1,\cdots, k_n)$ of integers and the connected component depends only on the sum $k_1+\cdots + k_n$. For example, if you take the connected component of the trivial bundle (i.e. all bundles when the sum of the $k_i$'s is 0) then the trivial bundle is open (and dense) there. There can't be a coarse moduli space since every component is a finite-dimensional stack of with an infinite stratification. |
Apr
1 |
revised |
Moduli space of (all) vector bundles on $\mathbb{P}^1$
added 1 character in body |
Apr
1 |
answered | Moduli space of (all) vector bundles on $\mathbb{P}^1$ |
Feb
27 |
accepted | Cluster algebras and cluster varieties |
Feb
27 |
comment |
Cluster algebras and cluster varieties
Yes, you are right, I got confused. But David below gave exactly the answer I wanted. |
Feb
27 |
revised |
Cluster algebras and cluster varieties
added 98 characters in body |
Feb
27 |
asked | Cluster algebras and cluster varieties |
Feb
8 |
awarded | Yearling |
Nov
16 |
awarded | Nice Question |
Nov
9 |
awarded | Popular Question |
Oct
7 |
revised |
Quantum cohomology of line bundles over $\mathbb P^N$
added 2 characters in body |
Oct
2 |
comment |
Characters of cuspidal representations
Thanks you, I knew it was due to Deligne but for some reason I thought it was unpublished. |
Oct
2 |
accepted | Characters of cuspidal representations |