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SUMMARY:Federico Scavia (UBC)
DTSTART;VALUE=DATE-TIME:20210730T190000Z
DTEND;VALUE=DATE-TIME:20210730T200000Z
DTSTAMP;VALUE=DATE-TIME:20231130T071101Z
UID:agstanford/54
DESCRIPTION:Title: The Grothendieck ring of stacks\nby Federico Scavia (UBC) as part
of Stanford algebraic geometry seminar\n\n\nAbstract\nThe Grothendieck rin
g of algebraic stacks was introduced by T. Ekedahl in \n2009\, following u
p on work of other authors. It is a generalization of the \nGrothendieck r
ing of varieties. For every linear algebraic group $G$\, we may \nconsider
the class of its classifying stack $BG$ in this ring. Computing the \ncla
ss of $BG$ is related to the famous rationality problem for fields of \n$G
$-invariants (Noether's problem). I will give a brief introduction to the
\nGrothendieck ring of stacks\, and then talk about some of my results in
this \narea.\n\nThe synchronous discussion for Federico Scavia’s talk is
taking place not in zoom-chat\, but at https://tinyurl.com/2021-07-30-fs
(and will be deleted after ~3-7 days).\n
LOCATION:https://researchseminars.org/talk/agstanford/54/
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