bio | website | |
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location | ||
age | ||
visits | member for | 3 years, 7 months |
seen | Oct 16 at 8:09 | |
stats | profile views | 2,130 |
It is great to learn math on this website.
Sep 24 |
awarded | Autobiographer |
Jul 24 |
comment |
A topological criterion for connectedness of a semi-ample divisor
Artie, I think you right. Thank you! This reasoning is considerably simpler than what I had in mind. |
Jul 24 |
comment |
A topological criterion for connectedness of a semi-ample divisor
Artie, thanks for your comment. Why $f: X\to Y$ has connected fibres? |
Jul 24 |
revised |
A topological criterion for connectedness of a semi-ample divisor
added 10 characters in body |
Jul 24 |
asked | A topological criterion for connectedness of a semi-ample divisor |
Jul 22 |
comment |
Non-vanishing of elements in cohomology of full Flag varieties
I finally got it :) |
Jul 22 |
accepted | Non-vanishing of elements in cohomology of full Flag varieties |
Jul 21 |
comment |
Non-vanishing of elements in cohomology of full Flag varieties
Thank you very much David! I will need a bit of time to digest your proof :) |
Jul 21 |
comment |
Non-vanishing of elements in cohomology of full Flag varieties
abx, yes thank you, I understand (I added one more tag - combinatorics). I ask this question here because for the moment I can not answer this combinatorial question. |
Jul 21 |
revised |
Non-vanishing of elements in cohomology of full Flag varieties
edited tags |
Jul 21 |
comment |
Non-vanishing of elements in cohomology of full Flag varieties
No Peter, I am interested in classes $\sigma_i$. If one replaces $\sigma_i$ by $\sigma_i-\sigma_{i-1}$ as you suggest, the question becomes completely different (and easy to answer) |
Jul 21 |
asked | Non-vanishing of elements in cohomology of full Flag varieties |
Jul 20 |
accepted | Rational normal curves on Grassmanians |
Jul 16 |
comment |
A semi-ampleness criterion for homogeneous bundles on homogeneous spaces?
Tanks Jason! I could not understand that ${\cal F}(X)$ are global sections :) . But now once I've got it, your answer is crystal clear :) |
Jul 16 |
accepted | A semi-ampleness criterion for homogeneous bundles on homogeneous spaces? |
Jul 16 |
comment |
A semi-ampleness criterion for homogeneous bundles on homogeneous spaces?
Jason, thank you for this detailed answer! I got that you prove that the bundle is globally generated, but I don't understand details. I have some questions that you might find very silly, but let me ask them. 1) What is the difference between $\cal F$ and ${\cal F}(X)$? 2) If this is the same thing then why the homomorphism $e$ is not an isomorphism? |
Jul 16 |
asked | A semi-ampleness criterion for homogeneous bundles on homogeneous spaces? |
Jul 16 |
comment |
Rational normal curves on Grassmanians
Thank you Jason. As far as I've got, the idea is simple, these normal curves have the shape $(u_1+tv_1)\wedge ... \wedge (u_k+tv_k)$, where $(u_i,v_i)$ are bases in two $k$-planes, and $t$ is the parameter on the normal curve. |
Jul 15 |
asked | Rational normal curves on Grassmanians |
Jul 10 |
accepted | Colourings of $\mathbb Q\times \mathbb Q$ in three colours |