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Let $M$ be any simply-connected Gorenstein space over any field. F\'elix and Thomas have extended to simply-connected Gorenstein spaces, the loop (co)products of Chas and Sullivan on the homology of the free loop space $H_*(LM)$. We…

Algebraic Topology · Mathematics 2013-04-26 Katsuhiko Kuribayashi , Luc Menichi , Takahito Naito

In \cite{baker-ozel}, by using Fredholm index we developed a version of Quillen's geometric cobordism theory for infinite dimensional Hilbert manifolds. This cobordism theory has a graded group structure under topological union operation…

Algebraic Topology · Mathematics 2007-05-23 cenap ozel

We apply a version of the Chas-Sullivan-Cohen-Jones product on the higher loop homology of a manifold in order to compute the homology of the spaces of continuous and holomorphic maps of the Riemann sphere into a complex projective space.…

Algebraic Topology · Mathematics 2009-03-02 Sadok Kallel , Paolo Salvatore

The negative cyclic homology for a differential graded algebra over the rational field has a quotient of the Hochschild homology as a direct summand if the $S$-action is trivial. With this fact, we show that the string bracket in the sense…

Algebraic Topology · Mathematics 2024-08-28 Katsuhiko Kuribayashi , Takahito Naito , Shun Wakatsuki , Toshihiro Yamaguchi

We will use the tools developed in [Rie24] to give a Morse-theoretic description of a string topology product on the homology of the space of paths in a manifold Y with endpoints in a submanifold X and a module structure on this homology…

Algebraic Topology · Mathematics 2025-12-17 Robin Riegel

We study string topology for classifying spaces of connected compact Lie groups, drawing connections with Hochschild cohomology and equivariant homotopy theory. First, for a compact Lie group $G$, we show that the string topology…

Algebraic Topology · Mathematics 2007-11-10 Kate Gruher , Craig Westerland

In this expository paper we discuss a project regarding the string topology of a manifold, that was inspired by recent work of Moore-Segal, Costello, and Hopkins and Lurie, on "open-closed topological conformal field theories". Given a…

Algebraic Topology · Mathematics 2009-06-30 Andrew J. Blumberg , Ralph L. Cohen , Constantin Teleman

Using intersection theory in the context of Hilbert manifolds and geometric homology we show how to recover the main operations of string topology built by M. Chas and D. Sullivan. We also study and build an action of the homology of…

Algebraic Topology · Mathematics 2007-05-23 David Chataur

Given a principal bundle over a closed manifold, G --> P --> M, let P^{Ad} --> M be the associated adjoint bundle. Gruher and Salvatore showed that the Thom spectrum (P^{Ad})^{-TM} is a ring spectrum whose corresponding product in homology…

Algebraic Topology · Mathematics 2013-04-03 Ralph L. Cohen , John D. S. Jones

In 1999 Chas and Sullivan showed that the homology of the free loop space of an oriented manifold admits the structure of a Batalin-Vilkovisky algebra. In this paper we give a complete description of this Batalin-Vilkovisky algebra for…

Algebraic Topology · Mathematics 2010-09-16 Richard A. Hepworth

Let M be a closed, connected manifold, and LM its loop space. In this paper we describe closed string topology operations in h_*(LM), where h_* is a generalized homology theory that supports an orientation of M. We will show that these…

Algebraic Topology · Mathematics 2007-05-23 Ralph L. Cohen , Veronique Godin

The homology of the free and the based loop space of a compact globally symmetric space can be studied through explicit cycles. We use cycles constructed by Bott and Samelson and by Ziller to study the string topology coproduct and the…

Algebraic Topology · Mathematics 2026-01-14 Philippe Kupper , Maximilian Stegemeyer

Let $M$ be a closed, oriented and smooth manifold of dimension $d$. Let $\L M$ be the space of smooth loops in $M$. Chas and Sullivan introduced loop product, a product of degree $-d$ on the homology of $LM$. In this paper we show how for…

Geometric Topology · Mathematics 2007-05-23 Hossein Abbaspour

We introduce a commutative product of degree $-n$ on the homology $H_\ast(X)$ of an $n$-dimensional special cubical set $X$ and lift it on the free loop homology $H_\ast(\Lambda M)$ for $M=|X|$ to be the geometric realization. These…

Algebraic Topology · Mathematics 2026-04-09 Samson Saneblidze

In this paper we compute the singular homology of the space of immersions of the circle into the $n$-sphere. Equipped with Chas-Sullivan's loop product these homology groups are graded commutative algebras, we also compute these algebras.…

Algebraic Topology · Mathematics 2009-03-27 David Chataur , Jean-Francois Le Borgne

We show that the topological Hochschild homology THH(R of an E_n-ring spectrum R is an E_{n-1}-ring spectrum. The proof is based on the fact that the tensor product of the operad Ass for monoid structures and the the little n-cubes operad…

Algebraic Topology · Mathematics 2014-10-01 M. Brun , Z. Fiedorowicz , R. M. Vogt

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…

Geometric Topology · Mathematics 2008-10-18 Ralph L. Cohen , Matthias Schwarz

The loop homology of a closed orientable manifold $M$ of dimension $d$ is the ordinary homology of the free loop space $M^{S^1}$ with degrees shifted by $d$, i.e. $\mathbb H_*(M^{S^1}) = H_{*+d}(M^{S^1})$. Chas and Sullivan have defined a…

Algebraic Topology · Mathematics 2007-05-23 Yves Félix , Jean-Claude Thomas , Micheline Vigué-Poirrier

In this paper, we investigate the behaviour of the Serre spectral sequence with respect to the algebraic structures of string topology in generalized homology theories, specificially with the Chas-Sullivan product and the corresponding…

Algebraic Topology · Mathematics 2016-01-20 Lennart Meier

We show that a model of chain complex of the free loop space of a $C^\infty$-manifold, which is proposed in arxiv:1404.0153, admits an action of a certain dg operad. This is a chain level structure under the Chas-Sullivan BV structure on…

Algebraic Topology · Mathematics 2015-09-07 Kei Irie