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SUMMARY:Jorge Plazas (Pontificia Universidad Javeriana)
DTSTART:20210922T190000Z
DTEND:20210922T200000Z
DTSTAMP:20260420T052929Z
UID:NYC-NCG/72
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/NYC-NCG/72/"
 >Noncommutative geometry of arithmetic groups</a>\nby Jorge Plazas (Pontif
 icia Universidad Javeriana) as part of Noncommutative geometry in NYC\n\n\
 nAbstract\nIn this talk we look at constructions from noncommutative geome
 try which encode various number theoretic properties of arithmetic groups.
 \n\nIn the first part of the talk we will discuss the relation between Con
 way's big picture and the Connes-Marcolli Gl(2) system. This relation lead
 s to noncommutative spaces encoding  properties of groups commensurable wi
 th the modular group. In the second part of the talk we discuss Hecke oper
 ators for Bianchi groups and the action of these in K-homology via Bredon 
 homology and the Baum-Connes conjecture.\n
LOCATION:https://researchseminars.org/talk/NYC-NCG/72/
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