Carə tuttə,

Vi ricordo che oggi alle 11 in Aula Seminari si terrà il seminario di Léo Bénard (Georg-August Universität Göttingen) dal titolo "Torsion function on character variety, divisor and multiplicity". Di seguito l'abstract.

Reidemeister torsion is a combinatorial invariant, famous among other things for distinguishing finite quotients of the sphere S^3, the lenticular spaces, which have the same homotopy type but which are not homeomorphic. The study of the torsion for more general 3-manifold (such as knot exteriors) is closely related to the study of their character varieties: these are algebraic varieties whose points are conjugacy classes of representations of fundamental groups. I will review some results I obtained in my thesis on this subject, and will discuss a recent result in collaboration with Ryoto Tange, Anh Tran and Jun Ueki, where we study the divisor induced by the torsion on these varieties.

Ricordiamo che le informazioni sui prossimi seminari si trovano sul sitohttps://www.dm.unipi.it/categoria-evento/geometry-seminar/.

Vi aspettiamo! Buona giornata,

Alice, Filippo e Giuseppe