Algebra and geometry online seminar 11/06

[Francesco Galuppi]

Dear colleagues,

this is to advertise the weekly seminar of the Algebra and geometry 
group of University of Trieste. On Friday, June 11th at 10:30, Giuseppe 
Favacchio (Politecnico di Torino) will tell us "When to expect 
unexpected hypersurfaces".

A subscheme X of Pn admits an unexpected hypersurface of degree t and 
multiplicity m if requiring multiplicity m at a general point P fails to 
impose the expected number of conditions on the linear system of 
hypersurfaces of degree t containing X. Conditions which either 
guarantee the occurrence of unexpected hypersurfaces, or which ensure 
that they cannot occur have shown surprising connections to root 
systems, hyperplane arrangements among other diverse topics. In this 
talk we focus in particular on the connection between unexpected 
hypersurfaces and the generic initial ideal.
Based on a joint work with E. Guardo, B. Harbourne, J. Migliore.

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.

All the best,
Francesco