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Notes On The Course Algebraic Topology by Boris Botvinnik


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Notes On The Course Algebraic Topology written by Boris Botvinnik This is an other great mathematics book cover the following topics.

  • Important examples of topological spaces
    Euclidian space, spheres, disks, Real projective spaces, Complex projective spaces, Grassmannian manifolds, Flag manifolds, Classic Lie groups, Stiefel manifolds, Surfaces

  • Constructions
    Product, Cylinder, suspension, Glueing, Join, Spaces of maps, loop spaces, path spaces, Pointed spaces

  • Homotopy and homotopy equivalence
    Definition of a homotopy, Homotopy classes of maps, Homotopy equivalence., Retracts, The case of “pointed” spaces

  • CW -complexes
    Basic definitions, Some comments on the definition of a CW -complex, Operations on CW -complexes, More examples of CW -complexes, CW -structure of the Grassmanian manifolds

  • CW -complexes and homotopy
    Borsuk’s Theorem on extension of homotopy, Cellular Approximation Theorem, Completion of the proof of Theorem, Fighting a phantom: Proof of Lemma, Back to the Proof of Lemma, First applications of Cellular Approximation Theorem

  • Fundamental group
    General definitions, One more definition of the fundamental group, Dependence of the fundamental group on the base point, Fundamental group of circle, Fundamental group of a finite CW -complex, Theorem of Seifert and Van Kampen

  • Covering spaces
    Definition and examples, Theorem on covering homotopy, Covering spaces and fundamental group, Observation, Lifting to a covering space, Classification of coverings over given space, Homotopy groups and covering spaces, Lens spaces

  • Higher homotopy groups
    More about homotopy groups, Dependence on the base point, Relative homotopy groups

  • Fiber bundles
    First steps toward fiber bundles, Constructions of new fiber bundles, Serre fiber bundles, Homotopy exact sequence of a fiber bundle, More on the groups pn(X, A; x0)

  • Suspension Theorem and Whitehead product
    The Freudenthal Theorem, First applications, A degree of a map Sn ?, Stable homotopy groups of spheres, Whitehead product

  • Homotopy groups of CW -complexes
    Changing homotopy groups by attaching a cell, Homotopy groups of a wedge, The first nontrivial homotopy group of a CW -complex, Weak homotopy equivalence, Cellular approximation of topological spaces, Eilenberg-McLane spaces, Killing the homotopy groups

  • Homology groups: basic constructions
    Singular homology, Chain complexes, chain maps and chain homotopy, First computations, Relative homology groups, Relative homology groups and regular homology groups, Excision Theorem, Mayer-Vietoris Theorem

  • Homology groups of CW -complexes
    Homology groups of spheres, Homology groups of a wedge, Maps g, Cellular chain complex, Geometric meaning of the boundary homomorphism ?, Some computations, Homology groups of RPn, Homology groups of CPn, HPn

  • Homology and homotopy groups
    Homology groups and weak homotopy equivalence, Hurewicz homomorphism, Hurewicz homomorphism in the case n = 1, Relative version of the Hurewicz Theorem

  • Homology with coefficients and cohomology groups
    Definitions, Basic propertries of H*(-; G) and H*(-; G), Coefficient sequences, The universal coefficient Theorem for homology groups, The universal coefficient Theorem for cohomology groups, The K¨unneth formula, The Eilenberg-Steenrod Axioms

  • Some applications
    The Lefschetz Fixed Point Theorem, The Jordan-Brouwer Theorem, The Brouwer Invariance Domain Theorem, Borsuk-Ulam Theorem
  • Cup product in cohomology.
    Ring structure in cohomology, Definition of the cup-product, Example, Relative case, External cup product

  • Cap product and the Poincar`e duality.
    Definition of the cap product, Crash course on manifolds, Poincar´e isomorphism, Some computations

  • Hopf Invariant
    Whitehead product, Hopf invariant

  • Elementary obstruction theory
    Eilenberg-MacLane spaces and cohomology operations, Obstruction theory, Proof of Theorem, Stable Cohomology operations and Steenrod algebra

  • Cohomology of some Lie groups and Stiefel manifolds
    Stiefel manifolds

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