BEGIN:VCALENDAR
VERSION:2.0
PRODID:researchseminars.org
CALSCALE:GREGORIAN
X-WR-CALNAME:researchseminars.org
BEGIN:VEVENT
SUMMARY:Luis Garcia (UCl)
DTSTART:20201209T160000Z
DTEND:20201209T170000Z
DTSTAMP:20260418T064247Z
UID:LNTS/20
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/LNTS/20/">Ei
 senstein classes and hyperplane complements</a>\nby Luis Garcia (UCl) as p
 art of London number theory seminar\n\n\nAbstract\nIn recent years several
  authors (Sczech\, Nori\, Hill\, Charollois-Dasgupta-Greenberg\, Beilinson
 -Kings-Levin) have defined and studied certain group cocycles ("Eisenstein
  cocycles") in the cohomology of arithmetic groups. I will discuss how the
 se constructions can be understood in terms of equivariant cohomology and 
 characteristic classes. This point of view relates the cocycles to the the
 ta correspondence and leads to generalisations relating the homology of ar
 ithmetic groups to algebraic objects such as meromorphic differentials on 
 hyperplane complements. I will discuss these generalisations and an applic
 ation to critical values of L-functions. \n\nThe talk is based on joint wo
 rk-in-progress with Nicolas Bergeron\, Pierre Charollois and Akshay Venkat
 esh.\n
LOCATION:https://researchseminars.org/talk/LNTS/20/
END:VEVENT
END:VCALENDAR