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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

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

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

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

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

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

We show that the Chas-Sullivan loop product, a combination of the Pontrjagin product on the fiber and intersection product on the base, makes sense on the total space homology of any fiberwise monoid E over a closed oriented manifold M.…

Algebraic Topology · Mathematics 2014-02-26 Kate Gruher , Paolo Salvatore

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…

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

We prove a transformation formula for the Goresky-Hingston loop coproduct in string topology under homotopy equivalences of manifolds. The formula involves the trace of the Whitehead torsion of the homotopy equivalence. In particular, it…

Algebraic Topology · Mathematics 2024-06-28 Florian Naef , Pavel Safronov

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

We construct an algebraic model for the Chas-Sullivan product and the Goresky-Hingston coproduct in string topology. The construction takes as its initial input a simplicial complex equipped with a local pairing on its simplicial chains,…

Algebraic Topology · Mathematics 2025-10-21 Manuel Rivera , Alex Takeda

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

This note explores the interaction between cohomology operations in a generalized cohomology theory and a string topology loop coproduct dual to the Chas--Sullivan loop product. More precisely, we ask for a description for the failure of a…

Algebraic Topology · Mathematics 2007-12-04 Anssi Lahtinen

Let M be a connected, simply connected, closed and oriented manifold, and G a finite group acting on M by orientation preserving diffeomorphisms. In this paper we show an explicit ring isomorphism between the orbifold string topology of the…

Algebraic Topology · Mathematics 2014-02-26 Andres Angel , Erik Backelin , Bernardo Uribe

Chen and Ruan's orbifold cohomology of the symmetric product of a complex manifold is calculated. An isomorphism of rings (up to a change of signs) $H_{orb}^*(X^n/S_n;\complex) \cong H^*(X^{[n]};\complex)$ between the orbifold cohomology of…

Algebraic Topology · Mathematics 2007-05-23 Bernardo Uribe

In this paper, I give a generalized analogue of the string topology results of Chas and Sullivan, and of Cohen and Jones. For a finite simplicial complex $X$ and $k \geq 1$, I construct a spectrum $Maps(S^k, X)^{S(X)}$, and show that the…

Algebraic Topology · Mathematics 2007-05-23 P. Hu

For M a closed, connected, oriented manifold, we obtain the Batalin-Vilkovisky (BV) algebra of its string topology through homotopy-theoretic constructions on its based loop space. In particular, we show that the Hochschild cohomology of…

Algebraic Topology · Mathematics 2011-04-01 Eric J. Malm

Cohen and Godin constructed positive boundary topological quantum field theory (TQFT) structure on the homology of free loop spaces of oriented closed smooth manifolds by associating a certain operations called string operations to…

Algebraic Topology · Mathematics 2008-11-17 Hirotaka Tamanoi

We develop a machinery of Chen iterated integrals for higher Hochschild complexes. These are complexes whose differentials are modeled on an arbitrary simplicial set much in the same way the ordinary Hochschild differential is modeled on…

Quantum Algebra · Mathematics 2011-01-07 Gregory Ginot , Thomas Tradler , Mahmoud Zeinalian

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
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