Isac Hedén: The Borel subgroups of the Cremona group

  • Datum: –12.00
  • Plats: Ångströmlaboratoriet 4101
  • Arrangör: Matematiska institutionen
  • Kontaktperson: Inger Sigstam
  • Seminarium

Abstract: The defining property of a Borel subgroup in a linear
algebraic group is that it is maximal among closed connected solvable
subgroups. It is well known that all Borel subgroups are conjugate in an
algebraic group. We investigate the situation in the case of the Cremona
group, i.e. the group of all birational automorphisms of the projective
plane. This is a joint work with Jean-Philippe Furter.