Dissertations / Theses on the topic 'Algèbres à homotopie près'
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Louis, Ruben. "Les algèbres supérieures universelles des espaces singuliers et leurs symétries." Electronic Thesis or Diss., Université de Lorraine, 2022. http://www.theses.fr/2022LORR0165.
This thesis breaks into two main parts.1) We show that there is an equivalence of categories between Lie-Rinehart algebras over a commutative algebra O and homotopy equivalence classes of negatively graded acyclic Lie infinity-algebroids. Therefore, this result makes sense of the universal Lie infinity-algebroid of every singular foliation,without any additional assumption, and for Androulidakis-Zambon singular Lie algebroids. This extends to a purely algebraic setting the construction of the universal Q-manifold of a locally real analytic singular foliation. Also, to any ideal I of O preserved by the anchor map of a Lie-Rinehart algebra A, we associate a homotopy equivalence class of negatively graded Lie infinity-algebroids over complexes computing Tor_O(A,O/I). Several explicit examples are given.2) The second part is dedicated to some applications of the results on Lie-Rinehart algebras.a. We associate to any affine variety a universal Lie infinity-algebroid of the Lie-Rinehart algebra of its vector fields. We study the effect of some common operations on affine varieties such as blow-ups, germs at a point, etc.b. We give an interpretation of the blow-up of a singular foliation F in the sense of Omar Mohsen in term of the universal Lie infinity-algebroid of F.c. We introduce the notion of longitudinal vector fields on a graded manifold over a singular foliation, and study their cohomology. We prove that the cohomology groups of the latter vanish.d. We study symmetries of singular foliations through universal Lie infinity-algebroids. More precisely, we prove that a weak symmetry action of a Lie algebra g on a singular foliation F (which is morally an action of g on the leaf space M/F) induces a unique up to homotopy Lie infinity-morphism from g to the Differential Graded Lie Algebra (DGLA) of vector fields on a universal Lie infinity-algebroid of F. We deduce from this general result several geometrical consequences. For instance, we give an example of a Lie algebra action on an affine sub-variety which cannot be extended on the ambient space. Last, we present the notion of tower of bi-submersions over a singular foliation and lift symmetries to those
Bellier, Olivia. "Propriétés algébriques et homotopiques des opérades sur une algèbre de Hopf." Phd thesis, Université Nice Sophia Antipolis, 2012. http://tel.archives-ouvertes.fr/tel-00756113.
Lefèvre-Hasegawa, Kenji. "Sur les A [infini]-catégories." Phd thesis, Université Paris-Diderot - Paris VII, 2003. http://tel.archives-ouvertes.fr/tel-00007761.
Boilley, Christophe. "Plongement entre variétés lisses à homotopie rationnelle près." Lille 1, 2005. https://pepite-depot.univ-lille.fr/RESTREINT/Th_Num/2005/50376-2005-196.pdf.
Elhage, Hassan Nawfal. "Rangs stables des C*-algèbres." Aix-Marseille 2, 1993. http://www.theses.fr/1993AIX22034.
Millès, Joan. "Algèbres et opérades : cohomologie, homotopie et dualité de Koszul." Nice, 2010. http://www.theses.fr/2010NICE4063.
Using the Koszul duality theory of operads, we make the André Quikllen cohomology of algebras over an operad explicit. This cohomologie theory is represented by a chain complex : the cotangent compex. We provide criteria for the André Quillen cohomologie theory to be an Ext-functor. In particular, this is the case for algebras over cofibrant operads and this gives a new stable homotopy property for these algebras. Then we generalize the Koszul duality theory of associative algebras in two dependant directions. On the one hand, we extend the Koszul duality theory to non necessarily augmented operads in order to treat algebras with unit. The notion of curvature appears to encode the default of augmentation. As a corollary, we obtain homotopical and cohomological theories for unital associative algebras or unital and counital Frobenius algebras. We make the case of unital associative algebras explicit. On the other hand, we generalize the Koszul duality theory to algebras over an operad. To do this, we show that the contangent complex provides the good generalization of the Koszul complex
Menichi, Luc. "Sur l'algèbre de cohomologie d'une fibre." Lille 1, 1997. http://www.theses.fr/1997LIL10078.
Balavoine, David. "Déformations de structures algébriques et opérades." Montpellier 2, 1997. http://www.theses.fr/1997MON20070.
Yalin, Sinan. "Théorie de l'homotopie des algèbres sur un PROP." Thesis, Lille 1, 2013. http://www.theses.fr/2013LIL10051/document.
The purpose of this thesis is to set up a general homotopy theory for categories of differential graded bialgebras. A first part is devoted to the case of bialgebras defined by a pair of operads in distribution. Classical bialgebras, Lie bialgebras and Poisson bialgebras provide examples of such bialgebra structures. The main result of this part asserts that the category of bialgebras associated to a pair of operads in distribution inherits a model category structure. The notion of a PROP provides a setting for the study of general bialgebras structures, involving operations with multiple inputs and multiple outputs as generators of the structure, in contrast to operads in distribution which only encode operations with either one single input or one single output. PROPs form a category, in which one can define a notion of cofibrant object with good homotopical properties. The second part of the thesis is devoted to the homotopy theory of bialgebras over a PROP. The main result of the thesis asserts that the categories of bialgebras associated to weakly equivalent cofibrant props have equivalent homotopy categories. We actually prove a more precise theorem asserting that this equivalence holds at the level of a simplicial localization of the categories. Our theorem implies that the category of bialgebras associated to a cofibrant resolution of a given PROP P defines a notion of bialgebra up to homotopy over P independent of the choice of the resolution, and enables us to give a sense to homotopical realization problems in this setting
Aounil, Ismail. "Classes caractéristiques d'une opération en homologie cyclique." Toulouse 3, 1992. http://www.theses.fr/1992TOU30020.
Ricka, Nicolas. "Sous-algèbres de l'algèbre de Steenrod équivariante et une propriété de détection pour la K-théorie d'Atiyah." Phd thesis, Université Paris-Nord - Paris XIII, 2013. http://tel.archives-ouvertes.fr/tel-00953049.
Aubriot, Thomas. "Classification des objets galoisiens d'une algèbre de Hopf." Phd thesis, Université Louis Pasteur - Strasbourg I, 2007. http://tel.archives-ouvertes.fr/tel-00151368.
$$ \beta (x\otimes y ) = \delta (x) (y\otimes 1)$$ est une bijection. Les objets galoisiens forment une classe importante d'extensions de Hopf-Galois ; ce sont celles dont la sous-algèbre des co\"\i nvariants se réduit à l'anneau de base. Bien qu'une littérature abondante ait été consacrée aux extensions de Hopf-Galois, on a peu de résultats sur leur classification à isomorphisme près. Pour contourner la difficulté de classer les extensions de Hopf-Galois à isomorphisme près, Kassel a introduit et développé avec Schneider une relation d'équivalence sur les extensions de Hopf-Galois qu'il a appelée homotopie.
Dans cette thèse nous donnons des résultats de classification à homotopie et à isomorphisme près. Notre approche de la classification des objets galoisiens tourne autour de trois axes.
\begin{itemize}
\item[a)] La construction explicite de représentants des classes d'homotopie des objets galoisiens de l'algèbre $U_q(\mathfrak{g})$ associée par Drinfeld et Jimbo à une algèbre de Lie $\mathfrak{g}$, explicitant ainsi un théorème de Kassel et Schneider.
\item[b)] Une étude des objets galoisiens de l'alg\` ebre quantique $O_q (SL(2))$ des fonctions sur le groupe $SL (2)$, et donc un résultat de classification en dimension infinie; nous donnons la classification à isomorphisme près et des résultats partiels pour la classification à homotopie près.
\item[c)] Une étude systématique de la classification à isomorphisme et à homotopie près pour les algèbres de Hopf de dimension $\leq 15$ ; nous synthétisons des résultats éparpillés dans la littérature, portant sur des familles d'algèbres de Hopf pointées ou semisimples et nous complétons ces résultats en donnant la classification des objets galoisiens d'une algèbre de Hopf de dimension $8$ qui n'est ni semisimple ni
pointée.
\end{itemize}
Robert-Nicoud, Daniel. "Opérades et espaces de Maurer-Cartan." Thesis, Sorbonne Paris Cité, 2018. http://www.theses.fr/2018USPCD048.
This thesis is inscribed in the topics of operad theory and homotopical algebra. Suppose we are given a type of algebras, a type of coalgebras, and a relationship between those types of algebraic structures (encoded by an operad, a cooperad, and a twisting morphism respectively). Then, it is possible to endow the space of linear maps from a coalgebra C and an algebra A with a natural structure of Lie algebra up to homotopy. We call the resulting homotopy Lie algebra the convolution algebra of A and C. In this thesis, we study the theory of convolution algebras and their compatibility with the tools of homotopical algebra : infinity morphisms and the homotopy transfer theorem. After doing that, we apply this theory to various domains, such as derived deformation theory and rational homotopy theory. In the first case, we use the tools we developed to construct an universal Lie algebra representing the space of Maurer-Cartan elements, a fundamental object of deformation theory. In the second case, we generalize a result of Berglund on rational models for mapping spaces between pointed topological spaces
Lavau, Sylvain. "Lie infini-algébroides et feuilletages singuliers." Thesis, Lyon, 2016. http://www.theses.fr/2016LYSE1215/document.
A smooth manifold is said to be foliated when it is partitioned into immersed submanifolds. Foliation Theory has profound applications in various fields of Mathematics and Physics, and it seems much more interesting to analyze the foliation from what seems to be a more fundamental point of view: its associated distribution of vector fields. Thus we have noticed that if the foliation is resolved by a graded fiber bundle, one can lift the Lie bracket of vector fields into a Lie infinity-algebroid structure on this fiber bundle. Moreover, this structure is universal in the sense that any other resolution of the foliation is isomorphic to it in the L_infinity setup, but only up to homotopy. When one restricts the analysis over a point, we observe that the cohomology associated to the resolution may become non trivial. The universal Lie infinity-algebroid structure hence reduces to a graded Lie algebra structure on this cohomology. This algebraic structure can be carried (non canonically) along the leaf, providing the cohomology over a leaf with a graded Lie algebroid structure. This enables us to retrieve former well-known results, as well as promising advances
Stefani, Davide. "Representations up to homotopy and perfect complexes over differentiable stacks." Electronic Thesis or Diss., Sorbonne université, 2019. http://www.theses.fr/2019SORUS687.
This thesis is concerned with the geometry of stacks in the differential geometry context using homotopical and higher categorical techniques. These techniques becomes necessary to deal with simple stack generalizations of crucial objects such as tangent and cotangent bundles, forms on a stack, their automorphisms and more generally perfect complexes, which are one of the main object of study of this work. In the first part of this thesis we give an overview of higher and differentiable stacks, their homotopy theory and cohomology theories. In the second part we study one representation up to homotopy of Lie groupoids and rely them with a theory of perfect complex over differentiable stacks. Among our results, we show that a representation up to homotopy on a Lie groupoid is the same as a cohesive module on its dg-algebra of smooth functions and that the correspondent dg-categories are Morita invariant. This allows us to give a definition of dg-category of perfect complexes on a differentiable stack. We moreover construct a Lie 2-groupoid of automorphisms of 2-terms complexes of vector bundles, which is a higher analogue of the classifying stack BGL_n. We conclude by giving a definition of the differentiable 2-stack of perfect complexes of amplitude [0,1] by means of a Lie 2-groupoid presenting it
Jolly, Jean-Claude. "Solutions méromorphes sur C des systèmes d'au moins deux équations aux différences à coefficients constants et à deux pas récurrents (première partie)Solutions à [epsilon] près de systèmes d'équations aux dérivées partielles non linéaires de type mixte posés sur des ouverts non bornés (deuxième partie)." Angers, 2001. http://www.theses.fr/2001ANGE0027.
Jacquet-Malo, Lucie. "Objets rigides : de la combinatoire des catégories amassées supérieures à l'algèbre homotopique." Thesis, Amiens, 2017. http://www.theses.fr/2017AMIE0047/document.
We show that a subcategory of the m-cluster category of type D ̃n is isomorphic to a category consisting of arcs in an (n - 2)m-gon with two central (m - 1)-gons inside of it. We show that the mutation of colored quivers and m-cluster-tilting objects is compatible with the flip of an (m + 2)-angulation. In this thesis, we study the geometric realizations of m-cluster categories of Dynkin types A, D, A ̃ and D ̃. We show, in those four cases, that there is a bijection between (m + 2)-angulations and isoclasses of basic m-cluster tilting objects. Underthese bijections, flips of (m + 2)-angulations correspond to mutations of m-cluster tilting objects. Our strategy consists in showing that certain Iyama-Yoshino reductions of the m-cluster categories under consideration can be described in terms of cutting along an arc the corresponding geometric realizations. This allows to infer results from small cases to the general ones. Let Ɛ be a weakly idempotent complete exact category with enough injective and projective objects. Assume that M ⊆ Ɛ is a rigid, contravariantly finite subcategoryof Ɛ containing all the injective and projective objects, and stable under taking direct sums and summands. In this paper, Ɛ is equipped with the structure of a prefibration category with cofibrant replacements. As a corollary, we show, using the results of Demonet and Liu in [DL13], that the category of finite presentation modules on the costable category M is a localization of Ɛ. We also deduce that Ɛ → modM admits a calculus of fractions up to homotopy. These two corollaries are analogues for exact categories of results of Buan and Marsh in [BM13], [BM12] (see also [Bel13]) that hold for triangulated categories. If Ɛ is a Frobenius exact category, we enhance its structure of prefibration category to the structure of a model category (see the article of Palu in [?] for the case of triangulated categories). This last result applies in particular when Ɛ is any of the Hom-finite Frobenius categories appearing in relation to cluster algebras
Borie, Nicolas. "Calcul des invariants de groupes de permutations par transformee de fourier." Phd thesis, Université Paris Sud - Paris XI, 2011. http://tel.archives-ouvertes.fr/tel-00656789.
Sánchez, Jesús. "About E-infinity-structures in L-algebras." Thesis, Sorbonne Paris Cité, 2016. http://www.theses.fr/2016USPCC204/document.
In this thesis we recall the notion of L-algebra. L-algebras are intended as algebraic models for homotopy types. L-algebras were introduced by Alain Prouté in several talks since the eighties. The principal objective of this thesis is the description of an E-infinity-coalgebra structure on the main element of an L-algebra. This can be seen as a generalization of the E-infinity-coalgebra structure on the chain complex associated to a simplicial set given by Smith in Iterating the cobar construction, 1994. We construct an E-inifity-operad, denoted K, used to construct the E-inifity-coalgebra on the main element of a L-algebra. This E-inifity-coalgebra structure shows that the canonical L-algebra associated to a simplicial set contains at least as much homotopy information as the E-inifity-coalgebras usually associated to simplicial sets
Borie, Nicolas. "Calcul des invariants de groupes de permutations par transformée de Fourier." Thesis, Paris 11, 2011. http://www.theses.fr/2011PA112294/document.
This thesis concerns algorithmic approaches to three challenging problems in computational algebraic combinatorics.The firsts parts propose a Gröbner basis free approach for calculating the secondary invariants of a finite permutation group, proceeding by using evaluation at appropriately chosen points. This approach allows for exploiting the symmetries to confine the calculations into a smaller quotient space, which gives a tighter control on the algorithmic complexity, especially for large groups. The theoretical study is illustrated by extensive benchmarks using a fine implementation of algorithms. An important prerequisite is the generation of integer vectors modulo the action of a permutation group, whose algorithmic constitute a preliminary part of the thesis.The fourth part of this thesis is determining for a certain interesting quotient of an affine Hecke algebra exactly which root-of-unity specialization of its parameter lead to non-generic behavior.Finally, the last part presents a conjecture on the structure of certain q-deformed diagonal harmonics in many sets of variables for the infinite family of complex reflection groups.All chapters proceed widely by computer exploration, and most of established algorithms constitute contributions of the software Sage
Lefèvre, Louis-Clément. "Théorie de Hodge mixte et variétés des représentations des groupes fondamentaux des variétés algébriques complexes." Thesis, Université Grenoble Alpes (ComUE), 2018. http://www.theses.fr/2018GREAM029/document.
The mixed Hodge theory of Deligne provides additional structures on the cohomology groups of complex algebraic varieties. Since then, mixed Hodge structures have been constructed on the rational homotopy groups of such varieties by Morgan and Hain. In this vein, we construct mixed Hodge structures on invariants associated to linear representations of fundamental groups of smooth complex algebraic varieties. The starting point is the theory of Goldman and Millson that relates the deformation theory of such representations to the deformation theory via differential graded Lie algebras. This was reviewed by P. Eyssidieux and C. Simpson in the case of compact Kähler manifolds. In the non-compact case, and for representations with finite image, Kapovich and Millson constructed only non-canonical gradings. In order to construct mixed Hodge structures in the non-compact case and unify it with the compact case treated by Eyssidieux-Simpson, we re-write the classical Goldman-Millson theory using more modern ideas from derived deformation theory and a construction of L-infinity algebras due to Fiorenza and Manetti. Our mixed Hodge structure comes then directly from the H^0 of an explicit mixed Hodge complex, in a similar way as the method of Hain for the fundamental group, and whose functoriality appears clearly
"Plongement entre variétés lisses à homotopie rationnelle près." Université catholique de Louvain, 2005. http://edoc.bib.ucl.ac.be:81/ETD-db/collection/available/BelnUcetd-11172005-174706/.