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KRECK-STOLZ INVARIANTS FOR QUATERNIONIC LINE BUNDLES.
- Source :
- Transactions of the American Mathematical Society; Jun2013, Vol. 365 Issue 6, p3193-3225, 33p
- Publication Year :
- 2013
-
Abstract
- We generalise the Kreck-Stolz invariants s<subscript>2</subscript> and s<subscript>3</subscript> by defining a new invariant, the t-invariant, for quaternionic line bundles E over closed spinmanifolds M of dimension 4k-1 with H³(M;Q) = 0 such that c<subscript>2</subscript>(E) ? H<superscript>4</superscript>(M) is torsion. The t-invariant classifies closed smooth oriented 2-connected rational homology 7-spheres up to almost-diffeomorphism, that is, diffeomorphism up to a connected sum with an exotic sphere. It also detects exotic homeomorphisms between such manifolds. The t-invariant also gives information about quaternionic line bundles over a fixed manifold, and we use it to give a new proof of a theorem of Feder and Gitler about the values of the second Chern classes of quaternionic line bundles over HP<superscript>k</superscript>. The t-invariant for S<superscript>4k-1</superscript> is closely related to the Adams e-invariant on the (4k - 5)-stem. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00029947
- Volume :
- 365
- Issue :
- 6
- Database :
- Complementary Index
- Journal :
- Transactions of the American Mathematical Society
- Publication Type :
- Academic Journal
- Accession number :
- 86275253
- Full Text :
- https://doi.org/10.1090/s0002-9947-2012-05732-1