Seminar

Blown-up toric surfaces with non-polyhedral effective cone and applications to moduli spaces

Moduli and Algebraic Cycles

31 August 15:00 - 16:00

Ana-Maria Castravet - University of Versailles Saint-Quentin-en-Yvelines

I will discuss recent joint work with Antonio Laface, Jenia Tevelev and Luca Ugaglia, in which we construct examples of projective toric surfaces whose blow-up at a general point has a non-polyhedral (i.e., not finitely generated) cone of effective divisors, both in characteristic 0 and in prime characteristic. As a consequence, the Grothendieck-Knudsen moduli space of stable rational curves with n>=10 markings has a non polyhedral cone of effective divisors.

Click here to watch the seminar

Organizers
John Christian Ottem
University of Oslo
Dan Petersen
Stockholm University
David Rydh
KTH Royal Institute of Technology

Program
Contact

Dan Petersen

dan.petersen@math.su.se

Other
information

For practical matters at the Institute, send an e-mail to administration@mittag-leffler.se