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SUMMARY:Sally Gilles (Imperial College London)
DTSTART:20210412T170000Z
DTEND:20210412T175000Z
DTSTAMP:20260423T022933Z
UID:UCLA_NTS/27
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/UCLA_NTS/27/
 ">Syntomic cohomology and period morphisms</a>\nby Sally Gilles (Imperial 
 College London) as part of UCLA Number Theory Seminar\n\n\nAbstract\nIn 20
 17\, Colmez and Niziol proved a comparison theorem between arithmetic $p$-
 adic nearby cycles and syntomic cohomology sheaves. To prove it\, they gav
 e a local construction using $(\\phi\, \\Gamma)$-modules theory which allo
 ws to reduce the period isomorphism to a comparison theorem between cohomo
 logies of Lie algebras. I will explain the geometric version of this local
  construction and how to globalize it to get a new period isomorphism. In 
 particular\, the explicit description of this new isomorphism can be used 
 to compare previous constructions of period morphisms and prove they are e
 qual.\n
LOCATION:https://researchseminars.org/talk/UCLA_NTS/27/
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