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Добірка наукової літератури з теми "Algèbre quantitative"
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Статті в журналах з теми "Algèbre quantitative"
Djilali, Kaid-Ameur, and Ahmed Hebbar. "Effect of the Oxidation on the Tribological Behaviour of Steels." Mechanics and Mechanical Engineering 22, no. 4 (September 2, 2020): 1247–60. http://dx.doi.org/10.2478/mme-2018-0096.
Повний текст джерелаДисертації з теми "Algèbre quantitative"
Sarkis, Ralph. "Lifting Algebraic Reasoning to Generalized Metric Spaces." Electronic Thesis or Diss., Lyon, École normale supérieure, 2024. http://www.theses.fr/2024ENSL0025.
Повний текст джерелаAlgebraic reasoning is ubiquitous in mathematics and computer science, and it has been generalized to many different settings. In 2016, Mardare, Panangaden, and Plotkin introduced quantitative algebras, that is, metric spaces equipped with operations that are nonexpansive relative to the metric. They proved counterparts to important results in universal algebra, and in particular they provided a sound and complete deduction system generalizing Birkhoff's equational logic by replacing equality with equality up to \varepsilon. This allowed them to give algebraic axiomatizations for several important metrics like the Hausdorff and Kantorovich distances.In this thesis, we make two modifications to Mardare et al.'s framework. First, we replace metrics with a more general notion that captures pseudometrics, partial orders, probabilistic metrics, and more. Second, we do not require the operations in a quantitative algebra to be nonexpansive. We provide a sound and complete deduction system, we construct free quantitative algebras, and we demonstrate the value of our generalization by proving that any monad on generalized metric spaces that lifts a monad on sets can be presented with a quantitative algebraic theory. We apply this last result to obtain an axiomatization for the \L ukaszyk--Karmowski distance
Alberti, Michele. "On operational properties of quantitative extensions of lambda-calculus." Thesis, Aix-Marseille, 2014. http://www.theses.fr/2014AIXM4076/document.
Повний текст джерелаIn this thesis we deal with the operational behaviours of two quantitative extensions of pure λ-calculus, namely the algebraic λ-calculus and the probabilistic λ-calculus.In the first part, we study the β-reduction theory of the algebraic λ-calculus, a calculus allowing formal finite linear combinations of λ-terms to be expressed. Although the system enjoys the Church-Rosser property, reduction collapses in presence of negative coefficients. We exhibit a solution to the consequent loss of the notion of (unique) normal form, allowing the definition of a partial, but consistent, term equivalence. We then introduce a variant of β-reduction defined on canonical terms only, which we show partially characterises the previously established notion of normal form. In the process, we prove a factorisation theorem.In the second part, we study bisimulation and context equivalence in a λ-calculus endowed with a probabilistic choice. We show a technique for proving congruence of probabilistic applicative bisimilarity. While the technique follows Howe's method, some of the technicalities are quite different, relying on non-trivial "disentangling" properties for sets of real numbers. Finally we show that, while bisimilarity is in general strictly finer than context equivalence, coincidence between the two relations is achieved on pure λ-terms. The resulting equality is that induced by Lévy-Longo trees, generally accepted as the finest extensional equivalence on pure λ-terms under a lazy regime
Sotin, Pascal. "Aspects quantitatifs de l'analyse de programmes." Rennes 1, 2008. ftp://ftp.irisa.fr/techreports/theses/2008/sotin.pdf.
Повний текст джерелаCette thèse s'intéresse à divers aspects quantitatifs de l'analyse statique de programmes, notamment à la précision des analyses et aux analyses de consommation de ressources. Nous quantifions la précision des analyses numériques fondées sur la théorie de l'interprétation abstraite à l'aide de la théorie de la mesure. Nous examinons la théorie de l'interprétation abstraite probabiliste et la précision naturellement issue de la norme sur un espace de Hilbert. Nous proposons un cadre, nommé analyse statique quantitative qui partage avec cette dernière théorie le fait de modéliser les programmes par des opérateurs linéaires. Ce cadre permet d'exprimer d'une façon générique des consommations de ressources par un programme, grâce à une structure de dioïde, et de calculer des sur-approximations de ces consommations. Nous proposons notamment le concept de coût à long terme d'un programme, qui caractérise une consommation moyenne par pas d'exécution
Dell'Aiera, Clément. "Controlled K-theory for groupoids and applications." Thesis, Université de Lorraine, 2017. http://www.theses.fr/2017LORR0114/document.
Повний текст джерелаIn their paper entitled "On quantitative operator K-theory", H. Oyono-Oyono and G. Yu introduced a refinement of operator K-theory, called quantitative or controlled K-theory, adapted to the setting of filtered C_-algebras. In this thesis, we generalize filtration of C*-algebras. We show that this setting contains the theory developed by H. Oyono-Oyono and G. Yu, and is general enough to be applied to the setting of crossed products by étale groupoids and discrete quantum groups. We construct controlled assembly maps with values into this controlled K-groups, for Roe C*-algebras and crossed products by étale groupoids. We show that these controlled assembly maps factorize the usual Baum-Connes and coarse Baum-Connes assembly maps. We prove statements called quantitative statements, and we show that a controlled version of the Baum-Connes conjecture is satisfied for a large class of étale groupoids. The end of the thesis is devoted to several applications of these results. We show that the controlled coarse assembly map is equivalent to its analog with coefficients for the coarse groupoid introduced by G. Skandalis, J-L. Tu and G. Yu. We give a proof that coarse spaces which admit a _bred coarse embedding into Hilbert space satisfy the maximal controlled coarse Baum-Connes conjecture. Finally, we study étale groupoids whose proper actions are locally induced by compact open subgroupoids, e.g. ample groupoids introduced by J. Renault. We develop a restriction principle for these groupoids, and prove that under suitable assumptions, their crossed products satisfy the controlled Künneth formula
Dell'Aiera, Clément. "Controlled K-theory for groupoids and applications." Electronic Thesis or Diss., Université de Lorraine, 2017. http://www.theses.fr/2017LORR0114.
Повний текст джерелаIn their paper entitled "On quantitative operator K-theory", H. Oyono-Oyono and G. Yu introduced a refinement of operator K-theory, called quantitative or controlled K-theory, adapted to the setting of filtered C_-algebras. In this thesis, we generalize filtration of C*-algebras. We show that this setting contains the theory developed by H. Oyono-Oyono and G. Yu, and is general enough to be applied to the setting of crossed products by étale groupoids and discrete quantum groups. We construct controlled assembly maps with values into this controlled K-groups, for Roe C*-algebras and crossed products by étale groupoids. We show that these controlled assembly maps factorize the usual Baum-Connes and coarse Baum-Connes assembly maps. We prove statements called quantitative statements, and we show that a controlled version of the Baum-Connes conjecture is satisfied for a large class of étale groupoids. The end of the thesis is devoted to several applications of these results. We show that the controlled coarse assembly map is equivalent to its analog with coefficients for the coarse groupoid introduced by G. Skandalis, J-L. Tu and G. Yu. We give a proof that coarse spaces which admit a _bred coarse embedding into Hilbert space satisfy the maximal controlled coarse Baum-Connes conjecture. Finally, we study étale groupoids whose proper actions are locally induced by compact open subgroupoids, e.g. ample groupoids introduced by J. Renault. We develop a restriction principle for these groupoids, and prove that under suitable assumptions, their crossed products satisfy the controlled Künneth formula