| |
|
Peter J. Kahn
Symplectic torus bundles and group extensions
|
|
Published: |
February 3, 2005
|
Keywords: |
symplectic, fibre bundle, torus, group extension, localization |
Subject: |
57R17, 20K35, 53D05 |
|
|
Abstract
Symplectic torus bundles ξ:T2→ E→ B are classified by the second
cohomology group of B with local coefficients H1(T2). For B a compact, orientable
surface, the main theorem of this paper gives a necessary and sufficient condition on the
cohomology class corresponding to ξ for E to admit a symplectic structure compatible with
the symplectic bundle structure of ξ: namely, that it be a torsion class. The proof is based
on a group-extension-theoretic construction of J. Huebschmann, 1981. A key ingredient is the
notion of fibrewise-localization.
|
|
Author information
Dept. of Math., Malott Hall, Cornell U., Ithaca, NY 14850
kahn@math.cornell.edu
http://www.math.cornell.edu/~kahn/
|
|