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SUMMARY:Karin Schaller (FU Berlin)
DTSTART:20200611T090000Z
DTEND:20200611T100000Z
DTSTAMP:20260423T041353Z
UID:notts_ag/8
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/notts_ag/8/"
 >Polyhedral divisors and orbit decompositions of normal affine varieties w
 ith torus action</a>\nby Karin Schaller (FU Berlin) as part of Online Nott
 ingham algebraic geometry seminar\n\n\nAbstract\nNormal affine varieties o
 f dimension $n$ with an effective action of a $k$-dimensional algebraic to
 rus can be described completely in terms of proper polyhedral divisors liv
 ing on semiprojective varieties of dimension $n−k$. We use the language 
 of polyhedral divisors to study the collection of $T$-orbits and $T$-orbit
  closures of a normal affine $T$-variety in terms of its defining pp-divis
 or. This is based on previous work of Klaus Altmann and Jürgen Hausen com
 plemented by work in progress with Klaus Altmann.\n
LOCATION:https://researchseminars.org/talk/notts_ag/8/
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