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AuthorScheiderer, Claus. author
TitleReal and ร{137}tale Cohomology [electronic resource] / by Claus Scheiderer
ImprintBerlin, Heidelberg : Springer Berlin Heidelberg, 1994
Connect tohttp://dx.doi.org/10.1007/BFb0074269
Descript XXIV, 284 p. online resource

SUMMARY

This book makes a systematic study of the relations between the รฉtale cohomology of a scheme and the orderings of its residue fields. A major result is that in high degrees, รฉtale cohomology is cohomology of the real spectrum. It also contains new contributions in group cohomology and in topos theory. It is of interest to graduate students and researchers who work in algebraic geometry (not only real) and have some familiarity with the basics of รฉtale cohomology and Grothendieck sites. Independently, it is of interest to people working in the cohomology theory of groups or in topos theory


CONTENT

Real spectrum and real รฉtale site -- Glueing รฉtale and real รฉtale site -- Limit theorems, stalks, and other basic facts -- Some reminders on Weil restrictions -- Real spectrum of X and รฉtale site of -- The fundamental long exact sequence -- Cohomological dimension of X b , I: Reduction to the field case -- Equivariant sheaves for actions of topological groups -- Cohomological dimension of X b , II: The field case -- G-toposes -- Inverse limits of G-toposes: Two examples -- Group actions on spaces: Topological versus topos-theoretic constructions -- Quotient topos of a G-topos, for G of prime order -- Comparison theorems -- Base change theorems -- Constructible sheaves and finiteness theorems -- Cohomology of affine varieties -- Relations to the Zariski topology -- Examples and complements


Mathematics Algebraic geometry Group theory K-theory Mathematics Algebraic Geometry K-Theory Group Theory and Generalizations



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