bio | website | mate.dm.uba.ar/~aldoc9 |
---|---|---|
location | Buenos Aires | |
age | 41 | |
visits | member for | 5 years, 6 months |
seen | yesterday | |
stats | profile views | 20,032 |
May 14 |
awarded | Good Answer |
May 13 |
comment |
Homotopy type of embeddings of circle in the plane
My guess is because the group of self-homeos of the circle has contractible identity component (a homeo lifts to a map $\mathbb R\to\mathbb R$, and the latter is a strictly increasing or decreasing function which you can deform to a linear one) |
May 13 |
comment |
Homotopy type of embeddings of circle in the plane
What do you mean by embedding,exxactly? If the maps are injective then you have only two contractible components, no? |
May 3 |
comment |
Singular projective variety where the Cartan homomorphism is not an isomorphism?
The Hilbert series in that situation converges to a rational function which can be evaluated at everything which is not a pole. |
May 3 |
comment |
Singular projective variety where the Cartan homomorphism is not an isomorphism?
You talk about a linked question in your question but there is no link? |
Apr 23 |
comment |
When does Vopěnka's principle hold?
What is $0^\sharp$? :-| |
Apr 23 |
comment |
unfolding as resolution
I've always associated that with blowups. |
Apr 23 |
comment |
Must an algebraic variety with trivial tangent bundle be an abelian variety?
What a beautiful theorem. |
Apr 20 |
revised |
When is an algebra of commuting matrices (contained in one) generated by a single matrix?
deleted 1 character in body |
Mar 28 |
comment |
Are there any Algebraic Geometry Theorems that were proved using Combinatorics?
Mathematical truth has very few sources. Arithmetic is one, combinatorics is another. Most things have a genealogy which goes all the way to these true Adam and Eves, through a surprisingly short chain of begats. |
Mar 24 |
awarded | Good Answer |
Mar 17 |
awarded | Nice Answer |
Mar 7 |
comment |
Hochschild cohomology of the skew group ring D(X)#G in the complex analytic case
It would probably be a good idea to tell us what $D(X)$ is. |
Mar 7 |
comment |
Replacing functors by topologically or simplicially enriched functors
«Do you really care about Top?» is a great line :-) |
Mar 4 |
awarded | Nice Answer |
Mar 2 |
awarded | Disciplined |
Feb 27 |
comment |
Defining the cup product in Ext using a Kunneth formula
I'd say that if you really know how to lift cocycles to chain maps in an example, you also know how to write down the diagonal map :-) |
Feb 27 |
comment |
Defining the cup product in Ext using a Kunneth formula
Sometimes, yes (specially when you only need to compute a few products, rather than the whole thing) but the reduction ofmcup products to conputations in the derived category is not a reduction, as the Principle of Conservation of Difficulty kicks in. |
Feb 15 |
awarded | Popular Question |
Feb 12 |
comment |
space at the Planck scale
That naive attempt at combining the two ideas is way too naive! |