Dissertations / Theses on the topic 'Groupes de type fini'
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Champetier, Christophe. "Propriétés génériques des groupes de type fini." Lyon 1, 1991. http://www.theses.fr/1991LYO10239.
Lasserre, Clément. "Sur les groupes de type fini : primalité, axiomatisabilité quasi finie et bi-interprétabilité avec l'arithmétique." Paris 7, 2011. http://www.theses.fr/2011PA077112.
The thesis is about the model theory of finitely generated groups, with a view toward the notions of primality, quasi-finite axiomatizability and bi-interpretability with the arithmetic. In Chapter 2, polycyclic-by-finite QFA groups are characterized in a purely algebraic way. We also obtain that they are exactly the polycyclic-by-finite prime groups. Further, we show that the Hirsch number is definable. In Chapter 3, we investigate direct products of QFA groups. The problem is identified as a question on central extensions. In Chapter 4, we show that Thompson's groups F and T are bi-interpretable with the arithmetic, so are QFA and prime. This give the first example of such a simple group
Dat, Jean-François. "Représentations (modulaires) de type fini de groupes p-adiques." Paris 7, 2000. http://www.theses.fr/2000PA077252.
Mathéus, Frédéric. "Probabilités et géométrie dans certains groupes de type fini." Habilitation à diriger des recherches, Université de Bretagne Sud, 2011. http://tel.archives-ouvertes.fr/tel-00919399.
Deloro, Adrien. "Groupes simples connexes minimaux de type impair." Phd thesis, Université Paris-Diderot - Paris VII, 2007. http://tel.archives-ouvertes.fr/tel-00756728.
Bitar, Nicolás. "Subshifts of Finite Type on Groups : Emptiness and Aperiodicity." Electronic Thesis or Diss., université Paris-Saclay, 2024. http://www.theses.fr/2024UPASG034.
A subshift of finite type is a set of tilings of a group subject to a finite number of local constraints, where the group acts by translation. In recent years, much progress has been made in understanding their dynamical and computational properties. The goal of this thesis is to continue the study of how the algebraic and geometric properties of the underlying group influence the properties of subshifts of finite type defined on the group. The results are divided into three broad categories: decidability, aperiodicity, and substitutions. For the first part, we study the Domino Problem, its variants, and the consequences of its undecidability on many finitely generated groups. We classify the computability of the Seeded Domino Problem, the Recurring Domino Problem, the k-SAT Problem, and Domino Snake Problems for many well-known classes of groups. In particular, they are all decidable for virtually free groups. This classification is obtained through reductions involving SFT constructions, automata theory, and Monadic Second Order Logic. At the end of the first part, we go on a tangent to study the set of bi-infinite self-avoiding walks on Cayley graphs. This set appears naturally in the study of the Infinite Snake Problem and is a ℤ-subshift. We classify for which groups this subshift is aperiodic, of finite type, and sofic. We also study its entropy and its relation to the connective constant of the Cayley graph. The second part tackles the existence of strongly and weakly aperiodic subshifts of finite type. We begin with a survey on the state of the art of these problems and explore parallels with problems from probability and combinatorics. We then look at which subgroups of a group can be realized as the stabilizers of subshifts of finite type, establishing both algebraic and computational conditions for this to happen. Within this same framework, we introduce the class of periodically rigid groups, i.e. groups where every weakly aperiodic subshift of finite type is strongly aperiodic. We end this part by building upon the work of Aubrun and Kari to construct the first examples of strongly aperiodic subshifts of finite type on non-solvable Baumslag-Solitar groups and on Fₙ x ℤ. By theorems of Whyte and Cohen, we obtain the existence of such subshifts for non-cyclic generalized Baumslag-Solitar groups. The final part of the thesis introduces new notions of substitutions, S-adic systems, and their corresponding subshifts for countable groups. We identify three classes groups. First, we define S-decomposable groups. These groups have the appropriate hierarchical structure for defining general S-adic systems. Second, we study ccc groups introduced by Gao, Jackson, and Seward, as they allow the definition of constant-shape S-adic systems. Third, we introduce monoform groups. These groups allow for the definition of constant-shape substitutions. We provide examples for all three classes and examples for their corresponding S-adic systems. We finish studying the dynamical properties of the subshifts defined by these systems. We show that, in general, they are minimal under primitivity conditions, and that for some amenable ccc groups, they have zero entropy and are uniquely ergodic
Auclair, Emmanuel. "Les Surfaces et invariants de type fini en dimension 3." Phd thesis, Université Joseph Fourier (Grenoble), 2006. http://tel.archives-ouvertes.fr/tel-00113863.
Dans une première partie, on étudie la variation d'un invariant de degré 2n après chirurgie le long d'une surface par un élément du 2n-ième terme de la série centrale descendante du groupe de Torelli. Dans le cas d'un commutateur de 2n éléments du groupe de Torelli, on exprime cette variation en fonction de l'homomorphisme de Johnson évalué sur ces 2n éléments et du système de poids de l'invariant.
Le calcul des claspers de Goussarov-Habiro donne des équivalences topologiques entre des chirurgies sur des corps en anses plongés dans les variétés. Ce calcul a déjà permis de préciser le comportement des invariants de type fini lors de nombreuses modifications topologiques. La deuxième partie de cette thèse est consacrée à un raffinement de ce calcul. Ce raffinement est ensuite appliqué à l'obtention d'une formule de chirurgie géométrique sur les noeuds pour les invariants de degré 4, c'est-à-dire que l'on exprime la variation d'un tel invariant après chirurgie sur un noeud en fonction d'invariants de courbes tracées au voisinage d'une surface de Seifert de ce noeud.
Chaneb, Reda. "Basic sets and decomposition matrices of finite groups of Lie type in small characteristic." Thesis, Université de Paris (2019-....), 2019. http://www.theses.fr/2019UNIP7166.
This thesis is focused on the modular aspect of representation theory. More precisely, we are interisted in basic sets for unipotent blocks of finite groups of Lie typ which are « unitriangular ». In the first part of the thesis, following Lusztig’s work on the parametrisation of unipotent representations in characeristic , we introduce a method to count irreducible modular representations lying in unipotent blocks. We conjecture that our method holds for every finite groups of Lie type defined over a field of good characteristic and we verify our conjecture in many cases. The second part of the thesis consists to generalize results of Geck on the existence of unitriangular basic sets for unipotent 2-blocks of classical groups to the case where the center is disconnected. The last aspect of the thesis is the computation of decomposition matrices of finite groups of Lie type for bad primes. We got results for Sp4(q) and G2(q)
Massuyeau, Gwénaël. "Quelques aspects de la théorie des invariants de type fini en topologie de dimension trois." Habilitation à diriger des recherches, Université de Strasbourg, 2012. http://tel.archives-ouvertes.fr/tel-00734378.
Moutot, Etienne. "Autour du problème du Domino - Structures combinatoires et outils algébriques." Thesis, Lyon, 2020. http://www.theses.fr/2020LYSEN027.
Given a finite set of square tiles, the domino problem is the question of whether is it possible ta tile the plane using these tiles.This problem is known to be undecidable in the planar case, and is strongly linked ta the question of the periodicity of the tiling.ln this thesis we look at this problem in two different ways: we look at the particular case of low complexity tilings and we generalize it to more general structures than the plane: groups.A tiling of the plane is sa id of low complexity if there are at most mn rectangles of size m x n appearing in it. Nivat conjectured in 1997 that any such tiling must be periodic, with the consequence that the domino problem would be decidable for low complexity tilings. Using algebraic tools introduced by Kari and Szabados, we prove a generalized version of Nivat's conjecture for a particular class of tilings (a subclass of what is called of algebraic subshifts). We also manage to prove that Nivat's conjecture holds for uniformly recurrent tilings, with the consequence that the domino problem is indeed decidable for low-complexity tilings.The domino problem can be formulated in the more general context of Cayley graphs of groups. ln this thesis, we develop new techniques allowing to relate the Cayley graph of some groups with graphs of substitutions on words.A first technique allows us to show that there exists bath strongly periodic and weakly-but-not strongly a periodic tilings of the Baumslag-Solitar groups BS(l,n).A second technique is used to show that the domino problem is undecidable for surface groups. Which provides yet another class of groups verifying the conjecture saying that the domino problem of a group is decidable if and only if the group is virtually free
Frécon, Olivier. "Étude des groupes résolubles de rang de Morley fini." Lyon 1, 2000. http://www.theses.fr/2000LYO10216.
Bousquet, Gilles. "Plongements homogènes de SL2 (C) modulo un sous-groupe fini." Dijon, 2000. http://www.theses.fr/2000DIJOS059.
Jaligot, Eric. "Contributions à la classification des groupes simples de rang de Morley fini." Lyon 1, 1999. http://www.theses.fr/1999LYO10259.
Esterle, Alexandre. "Groupes d'Artin et algèbres de Hecke sur un corps fini." Thesis, Amiens, 2018. http://www.theses.fr/2018AMIE0061/document.
In this doctoral thesis, we will determine the image of Artin groups associated to all finite irreducible Coxeter groups inside their associated finite Iwahori-Hecke algebra. This was done in type A in articles by Brunat, Marin and Magaard. The Zariski closure of the image was determined in the generic case by Marin. It is suggested by strong approximation that the results should be similar in the finite case. However, the conditions required to use are much too strong and would only provide a portion of the results. We show in this thesis that they are but that new phenomena arise from the different field factorizations. The techniques used in the finite case are very different from the ones in the generic case. The main arguments come from finite group theory. In high dimension, we will use a theorem by Guralnick-Saxl which uses the classification of finite simple groups to give a condition for subgroups of linear groups to be classical groups in a natural representation. In low dimension, we will mainly use the classification of maximal subgroups of classical groups obtained by Bray, Holt and Roney-Dougal for the complicated cases
Tindzogho, Ntsiri Jules. "Étude de quelques liens entre les groupes de rang de Morley fini et les groupes algébriques linéaires." Thesis, Poitiers, 2013. http://www.theses.fr/2013POIT2267/document.
This thesis essentially focuses on relationships that may exist betweengroups of finite Morley rank and linear algebraic groups. Indeed, weestablish some algebraic properties to K-groups; while a linearity studyon these groups is drawn and allows in particular to obtain an analogueto Levi decomposition theorem of algebraic groups. Next, in a univers offinite Morley rank, we study a definable action of SL2(K) on an abeliangroup V such as V is SL2(K)-minimal, where K is an definable field ofnonzero characteristic. For that purpose, we show that Morley rank ofV denoted rk(V ) is even and multiple of rk(K). Finally, we analyze theconditions under which, given an algebraic group G over an algebraicallyfield of nonzero characteristic, the quotient G=Z(G) is definably linear.Besides, we show under certain assymptions that the group of definable automorphism of a simple K*-group is interpretable
Jaber, Khaled. "Propriétés équationnelles des groupes (généricité et largeur)." Lyon 1, 2000. http://www.theses.fr/2000LYO10183.
Mohamed, Ahmed Mohamed Saadbouh. "Modules de Drinfeld de rang 2 sur un corps fini." Aix-Marseille 2, 2004. http://www.theses.fr/2004AIX22022.
Zobiri, Djouher. "Groupes de Grothendieck associés à des familles de sous-quotients d'un groupe fini." Bordeaux 1, 1996. http://www.theses.fr/1996BOR10635.
Nguyen, Maxime. "Groupes modulaires et groupes d'automorphismes de complexes de surfaces de type infini." Thesis, Grenoble, 2012. http://www.theses.fr/2012GRENM102/document.
Let sigma g,n be an orientable surface of genus g with n punctures. The mapping class group of sigma g,n acts on several complexes, for instance the curve complex or the pants complex of the surface. It is proved that the automorphism group of each of these complexes are isomorphic to the mapping class group. This implies in particular that the group of outer automorphisms of a finite index subgroup is finite. The purpose of this thesis is to prove a similar result on some surfaces of infinite type and genus zero. For this, we define an asymptotic mapping class group of these surfaces, and then a locally infinite cellular complex where the mapping class group acts naturally. It brings up some properties of the automorphism group of each cellular complex by making automorphisms act on auxiliary graphs. The first studied asymptotic mapping class group is isomorphic to the Thompson group T. The second one is an extension of the universal mapping class group of genus zero
Moussard, Delphine. "Equivariance et invariants de type fini en dimension trois." Phd thesis, Université de Grenoble, 2012. http://tel.archives-ouvertes.fr/tel-00808274.
Garillot, François. "Outils génériques de preuve et théorie des groupes finis." Phd thesis, Ecole Polytechnique X, 2011. http://pastel.archives-ouvertes.fr/pastel-00649586.
Smith, David. "Algèbres de type laura, algèbres de groupes gauches et groupes de (co)homologie." Thèse, Université de Sherbrooke, 2006. http://savoirs.usherbrooke.ca/handle/11143/5079.
Smith, David. "Algèbres de type laura, algèbres de groupes gauches et groupes de (co)homologie." [S.l. : s.n.], 2006.
Cumplido, Cabello María. "Sous-groupes paraboliques et généricité dans les groupes d'Artin-Tits de type sphérique." Thesis, Rennes 1, 2018. http://www.theses.fr/2018REN1S022/document.
In the first part of this thesis we study the genericity conjecture: In the Cayley graph of the mapping class group of a closed surface we look at a ball of large radius centered on the identity vertex, and at the proportion of pseudo-Anosov vertices among the vertices in this ball. The genericity conjecture states that this proportion should tend to one as the radius tends to infinity. We prove that it stays bounded away from zero and prove similar results for a large class of subgroups of the mapping class group. We also present analogous results for Artin--Tits groups of spherical type, knowing that in this case being pseudo-Anosov is analogous to being a loxodromically acting element. In the second part we provide results about parabolic subgroups of Artin-Tits groups of spherical type: The minimal standardizer of a curve on a punctured disk is the minimal positive braid that transforms it into a round curve. We give an algorithm to compute it in a geometrical way. Then, we generalize this problem algebraically to parabolic subgroups of Artin--Tits groups of spherical type. We also show that the intersection of two parabolic subgroups is a parabolic subgroup and that the set of parabolic subgroups forms a lattice with respect to inclusion. Finally, we define the simplicial complex of irreducible parabolic subgroups, and we propose it as the analogue of the curve complex for mapping class groups
Grellier, Sandrine. "Espaces de fonctions holomorphes dans les domaines de type fini." Orléans, 1991. http://www.theses.fr/1991ORLE2025.
Meilhan, Jean-Baptiste. "Invariants de type fini des cylindres d'homologie et des string links." Phd thesis, Université de Nantes, 2003. http://tel.archives-ouvertes.fr/tel-00004184.
Massuyeau, Gwénaël. "Invariants de type fini des variétés de dimension trois et structures spinorielles." Phd thesis, Université de Nantes, 2002. http://tel.archives-ouvertes.fr/tel-00001919.
Baraquin, Isabelle. "Analyse et probabilité sur les groupes quantiques (localement) compacts et les groupes duaux." Thesis, Bourgogne Franche-Comté, 2019. http://www.theses.fr/2019UBFCD009.
In the first part, we introduce the tools of noncommutative mathematics that we will use in our study of finite quantum groups and dual groups. In particular, we present these "groups" and some of their properties.The second part is dedicated to the study of some finite quantum groups: the Kac-Paljutkin one and the family of Sekine. For each of these examples, we study (asymptotic) properties of the *-distribution of irreducible characters and convergence of random walks arising from linear combinations of irreducible characters. We first examine the representation theory to determine irreducible representations and their powers. Then we study the *-distribution of their trace with respect to the Haar state, by looking at the mixed *-moments. For the Sekine family we determine the asymptotic distribution (as the dimension of the algebra goes to infinity), by considering convergence of moments. For study of random walks, we bound the distance to the Haar state and determine the asymptotic behavior, i.e. the limit state if it exists. We note that the possible limits are any central idempotent state. We also look at cut-off phenomenon in the Sekine finite quantum groups.In the third part, we study dual groups in the sense of Voiculescu. In particular, we are interested in asymptotic properties of the *-distribution of traces of some matrices, with respect to the free Haar trace on the unitary dual group. The considered matrices are powers of the unitary matrix generating the Brown algebra. We proceed in two steps, first computing the mixed *-moments, then characterizing the distribution thanks to the free cumulants. We obtain that these traces are asymptotically *-free circular variables. We also explore the orthogonal dual group, which has a similar behavior
Barhoumi, Sami. "Modules projectifs de type fini sur les anneaux de polynômes : une approche constructive." Besançon, 2008. http://www.theses.fr/2008BESA2023.
Biswas, Arindam. "Théorie des groupes approximatifs et ses applications." Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLS573.
In the first part of this thesis, we study the structure of approximate subgroups inside metabelian groups (solvable groups of derived length 2) and show that if A is such a K-approximate subgroup, then it is K^(O(r)) controlled (in the sense of Tao) by a nilpotent group where r denotes the rank of G=Fit(G) and Fit(G) is the fitting subgroup of G.The second part is devoted to the study of growth of sets inside GLn(Fq) , where we show a bound on the diameter (with respect to any set of generators) for all finite simple subgroups of this group. What we have is - if G is a finite simple group of Lie type with rank n, and its base field has bounded size, then the diameter of the Cayley graph C(G; S) would be bounded by exp(O(n(logn)^3)). If the size of the base field Fq is not bounded then our method gives a bound of q^(O(n(log nq)3)) for the diameter.In the third part we are interested in the growth of sets inside commutative Moufang loops which are commutative loops respecting the moufang identities but without (necessarily)being associative. For them we show that if the sizes of the associator sets are bounded then the growth of approximate substructures inside these loops is similar to those in ordinary groups. In this way for the subclass of finitely generated commutative moufang loops we have a classification theorem of its approximate subloops
Gilles, Alexis. "Représentations spinorielles pour les groupes Hermitiens." Thesis, Université Côte d'Azur (ComUE), 2019. https://tel.archives-ouvertes.fr/tel-03177317.
We study a particular case of maximal homomorphisms from a surface group into a Hermitian Lie group of tube type, which we call integral maximal.In the first part, we deal with the case when the Lie group is locally isomorphic to the group of isometries of the hyperbolic plane. In this case, integral maximal homomorphisms induce hyperbolizations of the initial surface and we relate them to spin structures on Riemann surfaces, that is to line bundles whose tensor power is isomorphic to the tensor product of the canonical bundle and a given divisor. Fixing such an integral maximal representation, we associate to each geodesic an integer modulo a fixed integer, its translation number. We then give, when the surface is closed, the asymptotic growth of the number of geodesics with given translation number.In the second part, we study the general case of an arbitrary Hermitian Lie group of tube type. Fixing a specific finite cover of such a Lie group, we call the representations into the cover spin representations and we show that the space of integral maximal spin representations is homeomorphic to the product of the space of maximal representations into the initial Lie group and an explicit subspace of homomorphisms from the first homology group with integer coefficient of the unit tangent bundle of the surface into a finite cyclic group.The homeomorphism we construct is moreover mapping class group equivariant so that we naturally study the action of the mapping class group on the space of homomorphisms from the first homology group of the unit tangent bundle of the surface into a finite cyclic group.Finally we apply these results to count the number of connected components of diagonal representations into some Lie groups locally isomorphic to the symplectic group
Pagot, Guillaume. "Relèvement en caractéristique zéro d'actions de groupes abéliens de type (p,. . . ,p)." Bordeaux 1, 2002. http://www.theses.fr/2002BOR12603.
Rajhi, Anis. "Cohomologie d'espaces fibrés au-dessus de l'immeuble affine de GL(N)." Thesis, Poitiers, 2014. http://www.theses.fr/2014POIT2266/document.
This thesis consists of two parts: the first one gives a generalization of fiber spaces constructed above the Bruhat-Tits tree of the group GL(2) over a p-adic field. More precisely we construct a projective tower of spaces over the 1-skeleton of the Bruhat-Tits building of GL(n) over a p-adic field. We show that any cuspidal representation π of GL(n) embeds with multiplicity 1 in the first cohomology space with compact support of k-th floor of the tower, where k is the conductor of π. In the second part we constructed a space W above the barycentric subdivision of the Bruhat-Tits building of GL(n) over a p-adic field. To study the cohomology spaces with compact support of a proper G-simplicial complex X with a rather special equivariant covering, where G is a totally disconnected locally compact group, we show the existence of a spactrale sequence in the category of smooth representations of G that converges to the cohomology with compact support of X. Based on the latter results, we calculate the cohomology with compact support of W as smooth representation of GL(n), and then we show that the level zero cuspidal types of GL(n) appear with finite multiplicity in the cohomology of some finite simplicial complexes constructed in residual level. As a consequence, we show that the cuspidal representations of level 0 of GL(n) appear in the cohomology of W
Thilliez, Vincent. "Classes de Gevrey non isotropes et interpolation dans les domaines de type fini de C2." Paris 11, 1991. http://www.theses.fr/1991PA112114.
Marseglia, Stéphane. "Variétés projectives convexes de volume fini." Thesis, Strasbourg, 2017. http://www.theses.fr/2017STRAD019/document.
In this thesis, we study strictly convex projective manifolds of finite volume. Such a manifold is the quotient G\U of a properly convex open subset U of the real projective space RP^(n-1) by a discrete torsionfree subgroup G of SLn(R) preserving U. We study the Zariski closure of holonomies of convex projective manifolds of finite volume. For such manifolds G\U, we show that either the Zariski closure of G is SLn(R) or it is a conjugate of SO(1,n-1).We also focuss on the moduli space of strictly convex projective structures of finite volume. We show that this moduli space is a closed set of the representation space
Wang, Zhenjian. "Groupes projectifs et arrangements de droites." Thesis, Université Côte d'Azur (ComUE), 2017. http://www.theses.fr/2017AZUR4034/document.
The objective of this thesis is to investigate various questions about projective groups and line arrangements in the projective plane. A projective group is a group which is isomorphic to the fundamental group of a smooth complex projective variety. To study projective groups, sophisticated techniques in algebraic topology and algebraic geometry have been developed in the passed decades, for instance, the theory of cohomology jump loci, together with Hodge theory, has been proven a powerful tool. Line arrangements in the projective plane are of special interest in the study of projective groups. Indeed, there are many open questions related to projective groups, and the theory of hyperplane arrangements, and in particular that of line arrangements, which is quite an active area of research, may provide insights for these problems. Furthermore, problems concerning the fundamental groups of the complements of hyperplane arrangements can be reduced to the case of line arrangements, due to the celebrated Zariski theorem of Lefschetz type. Very often, in the study of projective groups or quasi-projective groups, one usually considers line arrangements first to get some intuitive ideas. In this thesis, we also prove some theorems that are of independent interest and can be used elsewhere, for instance, we prove properties concerning morphisms from products of projective spaces in Chapter 4, we show that some morphisms have generic connected fibers in Chapter 5 and we give criteria for a projective surface to be of general type in Chapter 7
Rahmani, Noureddine. "Géométrie spectrale des nilvariétés compactes de type H(p,r) et de type Heisenberg et travaux de prolongations de structures géométriques." Mulhouse, 1992. http://www.theses.fr/1992MULH0227.
Bonnet, Jean-Paul. "Un isomorphisme motivique entre deux variétés homogènes projectives sous l'action d'un groupe de type $G_2$." Phd thesis, Université des Sciences et Technologie de Lille - Lille I, 2003. http://tel.archives-ouvertes.fr/tel-00004214.
Minguez, Espallargas Alberto. "Correspondance de Howe l-modulaire : paires duales de type II." Paris 11, 2006. http://www.theses.fr/2006PA112229.
Pit, Vincent. "Codage du flot géodésique sur les surfaces hyperboliques de volume fini." Phd thesis, Université Sciences et Technologies - Bordeaux I, 2010. http://tel.archives-ouvertes.fr/tel-00553138.
Fructus, Mathieu. "Noyau et métrique de Bergman dans des formules de représentations pour les convexes de type fini et applications." Phd thesis, Université Paul Sabatier - Toulouse III, 2003. http://tel.archives-ouvertes.fr/tel-00004225.
Diab-el-Arab, Hilda. "Conception et réalisation d'un filtre actif de type RC utilisant un amplificateur de gain fini en technologie MMIC." Paris 11, 2001. http://www.theses.fr/2001PA112330.
This work deals with the design of analog biquadratic filters using voltage amplifiers. This study results from the transposition of such filter into microwaves. At first the filter was studied in its holistic struture in order to obtain its optimal configuration. By choosing wisely passive elements values of the later a band-pass filter was realized, which is stable accordable and simple to integrate in other cellular elements. However, this filter is highly sensitive to its constitutive elements. Among the elements that might influence the filter performance is the no-ideality of the amplifier. These things were examined and it was revealed that the no-ideality impair the filter fonction. Furthermore, a major part of this study focused on searching for a topology of a finite gain amplifier based on a feedback principle. .
Fructus, Mathieu. "Noyau et métrique de Bergman dans des formules de représentation pour les convexes de type fini et applications." Toulouse 3, 2003. http://www.theses.fr/2003TOU30211.
Delacrétaz, Wolff Anne-Sylvie. "Etudes génétiques et sérologiques des systèmes de groupes sanguins du mouton /." [S.l.] : [s.n.], 1997. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=12205.
Roy, Simon, and Simon Roy. "Conception optimale d'une chaîne de traction électrique pour une voiture de type Formule SAE." Master's thesis, Université Laval, 2016. http://hdl.handle.net/20.500.11794/27117.
Tableau d'honneur de la FÉSP
La Formule SAE (Society of Automotive Engineers) est une compétition étudiante consistant en la conception et la fabrication d'une voiture de course monoplace. De nombreux événements sont organisés à chaque année au cours desquels plusieurs universités rivalisent entre elles lors d'épreuves dynamiques et statiques. Celles-ci comprennent l'évaluation de la conception, l'évaluation des coûts de fabrication, l'accélération de la voiture, etc. Avec plus de 500 universités participantes et des événements annuels sur tous les continents, il s'agit de la plus importante compétition d'ingénierie étudiante au monde. L'équipe ULaval Racing a participé pendant plus de 20 ans aux compétitions annuelles réservées aux voitures à combustion. Afin de s'adapter à l'électrification des transports et aux nouvelles compétitions destinées aux voitures électriques, l'équipe a conçu et fabriqué une chaîne de traction électrique haute performance destinée à leur voiture 2015. L'approche traditionnelle employée pour concevoir une motorisation électrique consiste à imposer les performances désirées. Ces critères comprennent l'inclinaison maximale que la voiture doit pouvoir gravir, l'autonomie désirée ainsi qu'un profil de vitesse en fonction du temps, ou tout simplement un cycle routier. Cette approche n'est malheureusement pas appropriée pour la conception d'une traction électrique pour une voiture de type Formule SAE. Ce véhicule n'étant pas destiné à la conduite urbaine ou à la conduite sur autoroute, les cycles routiers existants ne sont pas représentatifs des conditions d'opération du bolide à concevoir. Ainsi, la réalisation de ce projet a nécessité l'identification du cycle d'opération routier sur lequel le véhicule doit opérer. Il sert de point de départ à la conception de la chaîne de traction composée des moteurs, de la batterie ainsi que des onduleurs de tension. L'utilisation d'une méthode de dimensionnement du système basée sur un algorithme d'optimisation génétique, suivie d'une optimisation locale couplée à une analyse par éléments-finis a permis l'obtention d'une solution optimale pour les circuits de type Formule SAE. La chaîne de traction conçue a été fabriquée et intégrée dans un prototype de voiture de l'équipe ULaval Racing lors de la saison 2015 afin de participer à diverses compétitions de voitures électriques.
La Formule SAE (Society of Automotive Engineers) est une compétition étudiante consistant en la conception et la fabrication d'une voiture de course monoplace. De nombreux événements sont organisés à chaque année au cours desquels plusieurs universités rivalisent entre elles lors d'épreuves dynamiques et statiques. Celles-ci comprennent l'évaluation de la conception, l'évaluation des coûts de fabrication, l'accélération de la voiture, etc. Avec plus de 500 universités participantes et des événements annuels sur tous les continents, il s'agit de la plus importante compétition d'ingénierie étudiante au monde. L'équipe ULaval Racing a participé pendant plus de 20 ans aux compétitions annuelles réservées aux voitures à combustion. Afin de s'adapter à l'électrification des transports et aux nouvelles compétitions destinées aux voitures électriques, l'équipe a conçu et fabriqué une chaîne de traction électrique haute performance destinée à leur voiture 2015. L'approche traditionnelle employée pour concevoir une motorisation électrique consiste à imposer les performances désirées. Ces critères comprennent l'inclinaison maximale que la voiture doit pouvoir gravir, l'autonomie désirée ainsi qu'un profil de vitesse en fonction du temps, ou tout simplement un cycle routier. Cette approche n'est malheureusement pas appropriée pour la conception d'une traction électrique pour une voiture de type Formule SAE. Ce véhicule n'étant pas destiné à la conduite urbaine ou à la conduite sur autoroute, les cycles routiers existants ne sont pas représentatifs des conditions d'opération du bolide à concevoir. Ainsi, la réalisation de ce projet a nécessité l'identification du cycle d'opération routier sur lequel le véhicule doit opérer. Il sert de point de départ à la conception de la chaîne de traction composée des moteurs, de la batterie ainsi que des onduleurs de tension. L'utilisation d'une méthode de dimensionnement du système basée sur un algorithme d'optimisation génétique, suivie d'une optimisation locale couplée à une analyse par éléments-finis a permis l'obtention d'une solution optimale pour les circuits de type Formule SAE. La chaîne de traction conçue a été fabriquée et intégrée dans un prototype de voiture de l'équipe ULaval Racing lors de la saison 2015 afin de participer à diverses compétitions de voitures électriques.
The Formula SAE (Society of Automotive Engineers) is a student engineering competition for which students design, build and race a single-seater racing car. Multiple events are organized every year during which the teams can compete against other universities. With more than 500 teams participating worldwide, it is the biggest student engineering competition in the world. The tests include the evaluation of the design, production costs, acceleration of the car, etc. The ULaval Racing team participated during more than 20 years at the annual Michigan competition reserved for internal combustion racecars. In order to adapt to the electrification of transportation and to the new competitions reserved for electric cars, the team designed and manufactured a high performance electric powertrain for their 2015 car. The traditional approach used to design an electric powertrain is to set the desired performances of the vehicle. These criteria include the maximum incline that the car must be able to climb, the desired range and a speed profile over time, also known as road cycle. Unfortunately, this approach is not suitable for the design of an electric powertrain for use in a Formula SAE racecar. Since this type of vehicle is not intended for city driving nor highway driving, the existing road cycles are not representative of the expected operating conditions. The realization of this project required the identification of the road cycle on which the vehicle will operate. It is used as a starting point for the design of the powertrain, which includes the electric motors, the battery pack and the power inverters. The use of a genetic optimization algorithm, followed by a local optimization coupled to a finite element analysis tool yielded an optimal solution suitable for the Formula SAE type race tracks. The drivetrain was designed, manufactured and integrated into the 2015 ULaval Racing vehicle. The car participated in various competitions intended for electric racecars and received multiple awards for its inovative design and its performance.
The Formula SAE (Society of Automotive Engineers) is a student engineering competition for which students design, build and race a single-seater racing car. Multiple events are organized every year during which the teams can compete against other universities. With more than 500 teams participating worldwide, it is the biggest student engineering competition in the world. The tests include the evaluation of the design, production costs, acceleration of the car, etc. The ULaval Racing team participated during more than 20 years at the annual Michigan competition reserved for internal combustion racecars. In order to adapt to the electrification of transportation and to the new competitions reserved for electric cars, the team designed and manufactured a high performance electric powertrain for their 2015 car. The traditional approach used to design an electric powertrain is to set the desired performances of the vehicle. These criteria include the maximum incline that the car must be able to climb, the desired range and a speed profile over time, also known as road cycle. Unfortunately, this approach is not suitable for the design of an electric powertrain for use in a Formula SAE racecar. Since this type of vehicle is not intended for city driving nor highway driving, the existing road cycles are not representative of the expected operating conditions. The realization of this project required the identification of the road cycle on which the vehicle will operate. It is used as a starting point for the design of the powertrain, which includes the electric motors, the battery pack and the power inverters. The use of a genetic optimization algorithm, followed by a local optimization coupled to a finite element analysis tool yielded an optimal solution suitable for the Formula SAE type race tracks. The drivetrain was designed, manufactured and integrated into the 2015 ULaval Racing vehicle. The car participated in various competitions intended for electric racecars and received multiple awards for its inovative design and its performance.
Brunerie, Guillaume. "Sur les groupes d’homotopie des sphères en théorie des types homotopiques." Thesis, Nice, 2016. http://www.theses.fr/2016NICE4029/document.
The goal of this thesis is to prove that π4(S3) ≃ Z/2Z in homotopy type theory. In particular it is a constructive and purely homotopy-theoretic proof. We first recall the basic concepts of homotopy type theory, and we prove some well-known results about the homotopy groups of spheres: the computation of the homotopy groups of the circle, the triviality of those of the form πk(Sn) with k < n, and the construction of the Hopf fibration. We then move to more advanced tools. In particular, we define the James construction which allows us to prove the Freudenthal suspension theorem and the fact that there exists a natural number n such that π4(S3) ≃ Z/nZ. Then we study the smash product of spheres, we construct the cohomology ring of a space, and we introduce the Hopf invariant, allowing us to narrow down the n to either 1 or 2. The Hopf invariant also allows us to prove that all the groups of the form π4n−1(S2n) are infinite. Finally we construct the Gysin exact sequence, allowing us to compute the cohomology of CP2 and to prove that π4(S3) ≃ Z/2Z and that more generally πn+1(Sn) ≃ Z/2Z for every n ≥ 3
Boissonnade, Nicolas. "Mise au point d'un élément fini de type poutre à section variable et autres applications à la construction métallique." Clermont-Ferrand 2, 2002. http://www.theses.fr/2002CLF21394.
Verdoucq, Laurent. "Dérivées tangentielles et interpolation pour les fonctions de la classe Ak[infini] au bord de domaines de type fini." Lille 1, 1998. https://pepite-depot.univ-lille.fr/LIBRE/Th_Num/1998/55376-1998-1.pdf.
Alexandre, William. "Régularité des équations de Cauchy-Riemann et Cauchy-Riemann tangentielles sur les domaines convexes de type fini de Cn." Lille 1, 2003. https://pepite-depot.univ-lille.fr/LIBRE/Th_Num/2003/50376-2003-103-104.pdf.
Régis-Gianas, Yann. "Des types aux assertions logiques : preuve automatique ou assistée de propriétés sur les programmes fonctionnels." Paris 7, 2007. http://www.theses.fr/2007PA077155.
This work studies two approaches to improve the safety of computer programs using static analysis. The first one is typing which guarantees that the evaluation of program cannot fail. The functional language ML has a very rich type system and also an algorithm that infers automatically the types. We focus on its adaptation to generalized algebraic datatypes (GADTs). In this setting, efficient computation of a most general type is impossible. We propose a stratification of the language that retains the usual caracteristics of the ML fragment and make explicit the use of GADTs. The resulting language, MLGX, entails a burden on the programmer who must annotate its programs too much. A second stratum, MLGI, offers a mecanism to infer locally, in a predictable and efficient but incomplete way most of the type annotations. The first part ends up on an illustration of thé expressiveness of GADTs to encode the invariants of pushdown automata used In LR parsing. The second approach augments the language with logic assertions that enable arbitrarily compiex specifications to be expressed. We check the compliance of the program semantics with respect to these specifications thanks to a method called Hoare logic and thanks to semi-automatic computer-based proofs. The design choices permit to handle first-class functions. They are directed by an implementation which is illustrated by the certifiction of a module of trees that denote finite sets