2,928 reputation
1825
bio website math.unibas.ch/~blanc
location Basel
age 33
visits member for 3 years, 2 months
seen Jun 17 at 7:50

I am working mostly in birational geometry, especially in studying Cremona groups.


May
16
awarded  Yearling
Feb
3
asked Blow-up of $\mathbb{P}^4$ along a smooth surface
Jan
21
answered Intersection of two real polynomial surfaces
Jan
11
answered What invariants distinguish these three-folds?
Jan
5
comment Movable Divisors
Yes, it seems to be the right definition. In my mind, the divisor $D$ was moving but one part was not. But the correct definition is certainly the one that you give. So we still do not have an example (if it exists).
Jan
4
comment Movable Divisors
I was also wondering...
Jan
4
revised Movable Divisors
added 486 characters in body
Jan
4
comment Movable Divisors
Good point. In this case, I do not know if such example really exists.
Jan
4
comment Movable Divisors
... Same idea at the same time. :-)
Jan
4
answered Movable Divisors
Jan
4
reviewed Approve Maximal Cohen-Macaulay modules of type one
Dec
30
comment Completion of a local ring of a curve
Thanks for the answer.
Dec
30
comment Completion of a local ring of a curve
Thanks for the answer.
Dec
30
comment Completion of a local ring of a curve
Thanks Francesco for your nice answer.
Dec
30
accepted Completion of a local ring of a curve
Dec
29
comment Completion of a local ring of a curve
Yes, that was what I had in mind, I specified it. Thanks.
Dec
29
revised Completion of a local ring of a curve
added 7 characters in body
Dec
29
asked Completion of a local ring of a curve
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