Evento
Descrizione:
Abstract : The transition from classical projective to modern birational geometry
left algebraic geometry with the task of understanding new birational
transformations such as flips and flops. In this talk, we describe some
birational maps among complex smooth projective varieties in terms of a
C*-action on a projective variety, that is called geometric realization
of the map. In particular, we focus on bispecial transformations, that
are a class of birational maps that contains special quadro-quadric
Cremona transformations, and we discuss how construct explicit smooth
geometric realizations of such maps.