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<dc:title xml:lang="fr">Topologie des cordes en théorie de Morse à coefficients différentiels gradués</dc:title>
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<dc:subject xml:lang="fr">Théorie de Morse</dc:subject>
<dc:subject xml:lang="fr">Topologie des cordes</dc:subject>
<dc:subject xml:lang="fr">Structures A infini</dc:subject>
<dc:subject xml:lang="fr">Topologie algébrique</dc:subject>
<dc:subject xml:lang="en">Morse theory</dc:subject>
<dc:subject xml:lang="en">String topology</dc:subject>
<dc:subject xml:lang="en">A infinity structures</dc:subject>
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<dcterms:abstract xml:lang="fr">Dans cette thèse, nous développons un modèle de Morse pour les opérations de topologie des cordes généralisées sur l'espace total d'une fibration en utilisant la théorie de Morse à coefficients différentiels gradués (DG). Les idées "d’intersection sur la base" et de "concaténation sur la fibre" sont bien adaptées à ce cadre. Nous donnons des modèles de Morse au niveau des chaînes pour les opérations qui définissent le produit de Chas-Sullivan sur l'homologie de l'espace des lacets libres d'une variété orientée et fermée. À cette fin, nous développons des propriétés fonctorielles par rapport aux coefficients en termes de morphismes de \Ai -modules et de morphismes de fibrations. Nous construisons également une version différentielle graduée de la formule de Künneth et de la construction de Pontryagin-Thom. En utilisant ces opérations, nous construisons une version en Homologie de Morse à coefficients DG du produit des chemins. Enfin, nous définissons l'homologie de Morse-Novikov à coefficients DG et généralisons ces modèles à ce cadre.</dcterms:abstract>
<dcterms:abstract xml:lang="en">In this thesis, we develop a Morse theoretical viewpoint on generalized String topology operations on the total space of a fibration using Morse theory with differential graded (DG) coefficients. The ideas of "intersecting on the base" and "concatenating on the fiber" are well-adapted to this framework. We give Morse models at the chain-level for the operations that define the Chas-Sullivan product on the homology of the free loop space of an oriented, closed, and connected manifold. For this purpose, we develop functorial properties with respect to the coefficients in terms of morphisms of \Ai -modules and morphisms of fibrations. We also build a differential graded version of the Künneth formula and of the Pontryagin-Thom construction. Using these operations, we build a DG Morse version of the Path-product. Finally, we define DG Morse-Novikov homology and generalize these models to this setting.</dcterms:abstract>
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