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Mod Two Homology and Cohomology (Paperback, 2014 ed.)
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Mod Two Homology and Cohomology (Paperback, 2014 ed.)
Series: Universitext
Expected to ship within 10 - 15 working days
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Cohomology and homology modulo 2 helps the reader grasp more
readily the basics of a major tool in algebraic topology. Compared
to a more general approach to (co)homology this refreshing approach
has many pedagogical advantages: 1. It leads more quickly to the
essentials of the subject, 2. An absence of signs and orientation
considerations simplifies the theory, 3. Computations and advanced
applications can be presented at an earlier stage, 4. Simple
geometrical interpretations of (co)chains. Mod 2 (co)homology was
developed in the first quarter of the twentieth century as an
alternative to integral homology, before both became particular
cases of (co)homology with arbitrary coefficients. The first
chapters of this book may serve as a basis for a graduate-level
introductory course to (co)homology. Simplicial and singular mod 2
(co)homology are introduced, with their products and Steenrod
squares, as well as equivariant cohomology. Classical applications
include Brouwer's fixed point theorem, Poincare duality,
Borsuk-Ulam theorem, Hopf invariant, Smith theory, Kervaire
invariant, etc. The cohomology of flag manifolds is treated in
detail (without spectral sequences), including the relationship
between Stiefel-Whitney classes and Schubert calculus. More recent
developments are also covered, including topological complexity,
face spaces, equivariant Morse theory, conjugation spaces, polygon
spaces, amongst others. Each chapter ends with exercises, with some
hints and answers at the end of the book.
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