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SUMMARY:Yuezhao Li (Peking University)
DTSTART:20261007T130000Z
DTEND:20261007T140000Z
DTSTAMP:20260826T233015Z
UID:NYC-NCG/224
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/NYC-NCG/224/
 ">Symmetry-breaking colimit of topological phases</a>\nby Yuezhao Li (Peki
 ng University) as part of Noncommutative geometry in NYC\n\n\nAbstract\nOp
 erators that are invariant under a symmetry group are also\ninvariant unde
 r any of its finite-index subgroups. The equivariant coarse\nIndices for t
 hese subgroups must be consistent under symmetry breaking.\nThis yields a 
 diagram of equivariant Roe algebras and their K-theory\ngroups\, whose col
 imit provides a dichotomy between weak/strong equivariant\nindices that or
 iginates from the theory of topological insulators. This is\nbased on join
 t work with Guo Chuan Thiang (Peking University).\n
LOCATION:https://researchseminars.org/talk/NYC-NCG/224/
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