bio | website | math.unibas.ch/~blanc |
---|---|---|
location | Basel | |
age | 33 | |
visits | member for | 2 years, 7 months |
seen | Dec 16 at 7:10 | |
stats | profile views | 1,377 |
I am working mostly in birational geometry, especially in studying Cremona groups.
Dec 9 |
comment |
A question od being algebraic stable for birational map
What kind of characterization are you looking for? You gave the definition. Equivalently, you can ask that $(f^k)^*=(f^*)^k$ for $k>0$, where $*$ means the action on $NS$. But the definition you give is much easier to check. |
Nov 9 |
reviewed | Approve Exploiting the Linearity of the Pullback |
Nov 8 |
reviewed | Approve Copositivity under tensor products |
Oct 7 |
reviewed | Approve Is there a formula for the number of labeled forests with $k$ components on $n$ vertices? |
Oct 4 |
reviewed | Approve Lyapunov stability of linear system |
Oct 4 |
reviewed | Approve Lyapunov stability, nonlinear system |
Sep 25 |
answered | Blowing up along birational equivalent subvarieties |
Sep 2 |
reviewed | Approve Hamiltonian Isotopy class of Lagrangian Submanifold |
Sep 2 |
awarded | Enlightened |
Sep 2 |
awarded | Nice Answer |
Aug 24 |
comment |
Pseudo-automorphisms on Fano varieties
Thanks for the nice answer. |
Aug 22 |
comment |
Pseudo-automorphisms on Fano varieties
Thanks everybody for your help. |
Aug 22 |
accepted | Pseudo-automorphisms on Fano varieties |
Aug 22 |
comment |
Pseudo-automorphisms on Fano varieties
Yes, the degree of a birational map $\mathbb{P}^n\dashrightarrow \mathbb{P}^n$ is the degree of the polynomials (given without common factors), and is also the induced map on the Picard group. @JasonStarr, Could you explain more what you mean with Hartog's Theorem / S2 extension in this context? I google it and did not understand exactly what you meant. |
Aug 21 |
asked | Pseudo-automorphisms on Fano varieties |
Aug 2 |
reviewed | Approve Existence of a family of elliptic curves with large torsion subgroup |
Jul 31 |
answered | Is there an algorithm to write down the 27 lines of a cubic surface? |
Jul 27 |
reviewed | Approve Discriminant and Different |
Jul 23 |
asked | Factors of the polynomial $X^n-a$ |
Jul 21 |
reviewed | Approve How to think about CM rings? |