[Dottorcomp] Insalate di Matematica - E. Marmo 05/11/2025

[Insalate Di Matematica]

Dear all,

We remind you *today*'s appointment of the series of seminars "Insalate di
Matematica".
Here are the details:

*Speaker*: Ettore Marmo (Università degli Studi di Milano-Bicocca)

*Date and time*: *5th of November 2025, 4:45 pm (CET)*

*Title*: "Cohomology rings of hyperplane and toric arrangement complements"

*Abstract*:  A complex hyperplane arrangement is a finite set of
codimension one vector subspaces of a complex vector space. Many
interesting topological spaces can be realized as the complement space of
such an arrangement, for instance the space of configurations of n distinct
points on the plane. These complement spaces have been the subject of
intense studies in the last decades from a variety of points of view:
topological, algebraic and combinatorial. Several results and techniques in
this framework can be adapted to more general settings, for example in the
case of toric arrangements, where the "ambient" complex vector space is
replaced by a complex torus and the hyperplanes are replaced by kernel of
monomial characters.

In this talk we will discuss some algebraic aspects regarding the
cohomology rings of the complement spaces of hyperplane and toric
arrangements, in particular we will be focusing on the question of whether
these (graded) rings are generated by elements of degree one.

*Keywords:* hyperplane arrangements, toric arrangements, cohomology rings

*Information to attend in person*
The seminar will take place at the building U9-Koinè, Università degli
Studi di Milano Bicocca; room U9-09.


*Information to attend online*
https://unimib.webex.com/unimib/j.php?MTID=m101728a0c0258813b6aa97783fb11fad
(password: insalate, 46725283 from phones)
<https://unimib.webex.com/unimib/j.php?MTID=m3c536ba5a33f71bb9d6a3bc9b00992ad>

For further information, please visit our website:
https://sites.google.com/view/insalate-di-matematica or contact us at
insalate.matematica a unimib.it. Find us also on our Instagram page:
https://www.instagram.com/insalate.di.matematica/
<https://www.instagram.com/insalate_di_matematica24/>

The organizers: Jessica Anzanello, Anna Donadini, Julian Feuerpfeil,
Kirubell Haile, Salvatore Lincastri, Paolo Malanchini, Marialetizia
Mosconi, Claudia Nocita, Eleonora Sforza, Filippo Valnegri.