The loop homology algebra of spheres and projective spaces

Details The loop homology algebra of spheres and projective spaces The loop homology algebra of spheres and projective spaces

2002-10-22

arxiv.org/abs/math/0210353v1

Mathematics

Algebraic Topology

15 pages, 0 figures, to appear in Proc. of Alg. Topology, Conf., Isle of Skye, 2001

Scientific paper

Chas and Sullivan recently defined an intersection product on the homology $H_*(LM)$ of the space of smooth loops in a closed, oriented manifold $M$. In this paper we will use the homotopy theoretic realization of this product described by the first two authors to construct a second quadrant spectral sequence of algebras converging to the loop homology multiplicatively, when $M$ is simply connected. The $E_2$ term of this spectral sequence is $H^*(M;H_*(\Omega M))$ where the product is given by the cup product on the cohomology of the manifold $H^* (M)$ with coefficients in the Pontryagin ring structure on the homology of its based loop space $H_*(\Omega M)$. We then use this spectral sequence to compute the ring structures of $H_* (LS^n)$ and $H_* (L\bcp^n)$.

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