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We have decided to discontinue the publication of preprints on our preprint server as of 1 March 2024. The publication culture within mathematics has changed so much due to the rise of repositories such as ArXiV (www.arxiv.org) that we are encouraging all institute members to make their preprints available there. An institute's repository in its previous form is, therefore, unnecessary. The preprints published to date will remain available here, but we will not add any new preprints here.

MiS Preprint
58/2008

A Morse theoretic description of string topology

Ralph L. Cohen and Matthias Schwarz

Abstract

Let $M$ be a closed, oriented, $n$-dimensional manifold. In this paper we give a Morse theoretic description of the string topology operations introduced by Chas and Sullivan, and extended by the first author, Jones, Godin, and others. We do this by studying maps from surfaces with cylindrical ends to $M$, such that on the cylinders, they satisfy the gradient flow equation of a Morse function on the loop space, $LM$. We then give Morse theoretic descriptions of related constructions, such as the Thom and Euler classes of a vector bundle, as well as the shriek, or umkehr homomorphism.

Received:
Sep 19, 2008
Published:
Sep 22, 2008

Related publications

inBook
2009 Repository Open Access
Ralph L. Cohen and Matthias Schwarz

A Morse theoretic description of string topology

In: New perspectives and challenges in symplectic field theory / Miguel Abreu... (eds.)
Providence, R.I. : American Mathematical Society, 2009. - pp. 147-172
(CRM proceedings & lecture notes ; 49)