Fiber products, Poincaré duality and $A_\infty$-ring spectra
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- by John R. Klein PDF
- Proc. Amer. Math. Soc. 134 (2006), 1825-1833
Abstract:
For a Poincaré duality space $X^d$ and a map $X \to B$, consider the homotopy fiber product $X \times ^B X$. If $X$ is orientable with respect to a multiplicative cohomology theory $E$, then, after suitably regrading, it is shown that the $E$-homology of $X \times ^B X$ has the structure of a graded associative algebra. When $X \to B$ is the diagonal map of a manifold $X$, one recovers a result of Chas and Sullivan about the homology of the unbased loop space $LX$.References
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Additional Information
- John R. Klein
- Affiliation: Department of Mathematics, Wayne State University, Detroit, Michigan 48202
- MR Author ID: 308817
- Email: klein@math.wayne.edu
- Received by editor(s): October 17, 2004
- Received by editor(s) in revised form: December 28, 2004
- Published electronically: October 25, 2005
- Additional Notes: The author was partially supported by NSF Grant DMS-0201695.
- Communicated by: Paul Goerss
- © Copyright 2005 by the author
- Journal: Proc. Amer. Math. Soc. 134 (2006), 1825-1833
- MSC (2000): Primary 55N91, 57R19; Secondary 55P10, 55B20
- DOI: https://doi.org/10.1090/S0002-9939-05-08148-7
- MathSciNet review: 2207500