BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:Logarithmic double-ramification cycles - Johannes Schmitt (ETH Zü
 rich)
DTSTART:20240621T103000Z
DTEND:20240621T113000Z
UID:TALK217690@talks.cam.ac.uk
DESCRIPTION:Inside the moduli space of smooth pointed curves\, the double-
 ramification locus is cut out by the condition that the curve admits a mer
 omorphic function with given zero and pole orders at the marked points. Wh
 en trying to compactify this cycle over the whole moduli space of stable c
 urves\, it turns out that the compactification naturally lives inside an i
 terated boundary blow-up of the moduli space. This leads to the notion of 
 logarithmic Chow groups\, describing the intersection theory of all such b
 low-ups simultaneously. In the talk I will explain this story and describe
  how stability conditions on line bundles can be used to calculate a formu
 la for the logarithmic compactification of the double-ramification locus. 
 This is joint work with D. Holmes\, S. Molcho\, R. Pandharipande and A. Pi
 xton.
LOCATION:Seminar Room 1\, Newton Institute
END:VEVENT
END:VCALENDAR