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Let M be a closed Riemannian manifold. We extend the product of Goresky-Hingston, on the cohomology of the free loop space of M relative to the constant loops, to a nonrelative product. It is graded associative and commutative, and…

Algebraic Topology · Mathematics 2022-01-31 Nancy Hingston , Nathalie Wahl

An interesting question in symplectic topology, which was posed by C. H. Taubes, concerns the topology of closed (i.e. compact and without boundary) connected oriented three dimensional manifolds whose product with a circle admits a…

Geometric Topology · Mathematics 2007-05-23 John D. McCarthy

Chas and Sullivan have defined an intersection-type product on the homology of the free loop space LM of an oriented manifold M. In this paper we show how to extend this construction to a topological conformal field theory of degree d. In…

Algebraic Topology · Mathematics 2008-02-19 Veronique Godin

The string topology coproduct is often perceived as a counterpart in string topology to the Chas-Sullivan product. However, in certain aspects the string topology coproduct is much harder to understand than the Chas-Sullivan product. In…

Algebraic Topology · Mathematics 2024-12-12 Philippe Kupper , Maximilian Stegemeyer

In this paper we study the string topology (\'a la Chas-Sullivan) of an orbifold. We define the string homology ring product at the level of the free loop space of the classifying space of an orbifold. We study its properties (introducing…

Algebraic Topology · Mathematics 2008-07-28 Ernesto Lupercio , Bernardo Uribe , Miguel A. Xicotencatl

We describe two major string topology operations, the Chas-Sullivan product and the Goresky-Hingston coproduct, from geometric and algebraic perspectives. The geometric construction uses Thom-Pontrjagin intersection theory while the…

Algebraic Topology · Mathematics 2025-01-06 Florian Naef , Manuel Rivera , Nathalie Wahl

We define a model for the homology of manifolds and use it to describe the intersection product on the homology of compact oriented manifolds and to define homological quantum field theories which generalizes the notions of string topology…

Geometric Topology · Mathematics 2007-05-23 Edmundo Castillo , Rafael Diaz

Let M be a closed, oriented, n -manifold, and LM its free loop space. Chas and Sullivan defined a commutative algebra structure in the homology of LM, and a Lie algebra structure in its equivariant homology. These structures are known as…

Geometric Topology · Mathematics 2014-02-26 Ralph L. Cohen , John Klein , Dennis Sullivan

In this article we consider algebraic structures on the homology of the space of paths in a manifold with endpoints in a submanifold. The Pontryagin-Chas-Sullivan product on the homology of this space had already been investigated by…

Algebraic Topology · Mathematics 2025-02-11 Maximilian Stegemeyer

Chas and Sullivan showed that the homology of the free loop space LM of an oriented closed smooth finite dimensional manifold M admits the structure of a Batalin-Vilkovisky (BV) algebra equipped with an associative product called the loop…

Algebraic Topology · Mathematics 2014-10-01 Hirotaka Tamanoi

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

In this paper we establish the existence of certain structures on the ordinary and equivariant homology of the free loop space on a manifold or, more generally, a formal Poincar\'e duality space. These structures; namely the loop product,…

Quantum Algebra · Mathematics 2007-08-15 Alastair Hamilton , Andrey Lazarev

An irreducible 3--manifold with torus boundary either is a Seifert fibered space or admits at most three lens space fillings according to the Cyclic Surgery Theorem. We examine the sharpness of this theorem by classifying the non-hyperbolic…

Geometric Topology · Mathematics 2013-08-26 Kenneth L. Baker , Brandy Guntel Doleshal , Neil Hoffman

Let $M$ be a closed, oriented manifold of dimension $d$. Let $LM$ be the space of smooth loops in $M$. Chas and Sullivan recently defined a product on the homology $H_*(LM)$ of degree $-d$. They then investigated other structure that this…

Geometric Topology · Mathematics 2007-05-23 Ralph L. Cohen , John D. S. Jones

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

Given a closed manifold $M$. We give an algebraic model for the Chas-Sullivan product and the Goresky-Hingston coproduct. In the simply-connected case, this admits a particularly nice description in terms of a Poincar\'e duality model of…

Quantum Algebra · Mathematics 2019-11-15 Florian Naef , Thomas Willwacher

We give a finite dimensional approach to the Chas-Sullivan product on the free loop space of a manifold, orientable or not.

Geometric Topology · Mathematics 2011-06-02 Francois Laudenbach

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

This paper presents, with explanatory details, the handle decompositions, fundamental groups and homology groups of 3-manifolds, including some knot complements. Hence, along this paper, when the word manifold appears it is implicit that…

Algebraic Topology · Mathematics 2026-03-20 Luca Di Beo

We use the computational power of rational homotopy theory to provide an explicit cochain model for the loop product and the string bracket of a 1-connected closed manifold M. We prove that the loop homology of M is isomorphic to the…

Algebraic Topology · Mathematics 2007-05-23 Yves Felix , Jean-Claude Thomas , Micheline Vigue-Poirrier
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