Algebra and geometry seminar 15-01-2021

[Francesco Galuppi]

Dear colleagues,

this is to advertise the weekly seminar of the Algebra and Geometry 
group of the university of Trieste. On Friday, January 15th at 10:30, 
Alex Massarenti (University of Ferrara) will talk about"On secant 
defectiveness of toric varieties".

Abstract: Let N be a free abelian group, M = Hom(N,*Z*) its dual, M_*Q* 
:= M ⊗ *Q* the corresponding rational vector space, P ⊆ M_*Q* a full 
dimensional lattice polytope, and (X_P , H) the corresponding polarized 
toric variety. We study the secant defectiveness of X_P in the embedding 
induced by H. In particular, we give a bound, depending only on the 
maximum number of integer points on a facet of P, for the non secant 
defectiveness of X_P. Furthermore, as an application, we get an almost 
asymptotically sharp bound for the non secant defectiveness of 
Segre-Veronese varieties.

The seminar will take place online. The zoom link is 
https://us02web.zoom.us/j/87239350702.

You are welcome to extend the invitation to anyone interested.

Best,
Francesco