© 2010

Intersection Spaces, Spatial Homology Truncation, and String Theory


Part of the Lecture Notes in Mathematics book series (LNM, volume 1997)

Table of contents

  1. Front Matter
    Pages i-xvi
  2. Markus Banagl
    Pages 1-106
  3. Markus Banagl
    Pages 107-189
  4. Markus Banagl
    Pages 191-209
  5. Back Matter
    Pages 211-223

About this book


Intersection cohomology assigns groups which satisfy a generalized form of Poincaré duality over the rationals to a stratified singular space. The present monograph introduces a method that assigns to certain classes of stratified spaces cell complexes, called intersection spaces, whose ordinary rational homology satisfies generalized Poincaré duality. The cornerstone of the method is a process of spatial homology truncation, whose functoriality properties are analyzed in detail. The material on truncation is autonomous and may be of independent interest to homotopy theorists. The cohomology of intersection spaces is not isomorphic to intersection cohomology and possesses algebraic features such as perversity-internal cup-products and cohomology operations that are not generally available for intersection cohomology. A mirror-symmetric interpretation, as well as applications to string theory concerning massless D-branes arising in type IIB theory during a Calabi-Yau conifold transition, are discussed.


Homotopy Homotopy Theory Intersection homology K-theory Singularities Stratified Spaces String Theory cohomology homology vector bundle

Authors and affiliations

  1. 1.Mathematics InstituteUniversity of HeidelbergHeidelbergGermany

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