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DTSTAMP:20250807T155033Z
DESCRIPTION:\n	\n		\n			\n				TITLE / TITRE\n					Minimal fibering degrees and asymptotic 
 degrees of irrationality\n					\n					ABSTRACT / RÉSUMÉ \n\n				A basic question about a
 n algebraic variety X is how similar it is to projective space. One measur
 e of similarity is the minimum degree of a rational map from X to projecti
 ve space\, called the degree of irrationality. This number\, and the corre
 sponding minimal-degree maps\, are in general challenging to compute\, but
  capture special features of the geometry of X. I will discuss some recent
  joint work with David Stapleton and Brooke Ullery on asymptotic bounds fo
 r degrees of irrationality of divisors X on projective varieties Y. Here\,
  the minimal-degree rational maps $X \dashrightarrow \mathbb{P}^n$ turn ou
 t to 'know' about Y and factor through rational maps $Y \dashrightarrow \m
 athbb{P}^n$ fibered in curves that are\, in an appropriate sense\, also of
  minimal degree.\n\n				Location: in person at UQAM PK-5675\n\n				or online at Zo
 om meeting 86352363947\n\n				 \n			\n		\n	\n\n
DTSTART:20231115T183000Z
DTEND:20231115T193000Z
SUMMARY:Jake Levinson (Université de Montréal)	
URL:/mathstat/channels/event/jake-levinson-universite-
 de-montreal-352707
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