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Publicacions matemàtiques

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Publicacions matemàtiques 10 records found  Search took 0.01 seconds. 
1.
86 p, 815.5 KB Towards differentiation and integration between Hopf algebroids and Lie algebroids / Ardizzoni, Alessandro (University of Turin, Department of Mathematics "Giuseppe Peano") ; El Kaoutit, Laiachi (Universidad de Granada. Departamento de Álgebra) ; Saracco, Paolo (Université libre de Bruxelles. Département de Mathématique)
In this paper we set up the foundations around the notions of formal differentiation and formal integration in the context of commutative Hopf algebroids and Lie-Rinehart algebras. Specifically, we construct a contravariant functor from the category of commutative Hopf algebroids with a fixed base algebra to that of Lie-Rinehart algebras over the same algebra, the differentiation functor, which can be seen as an algebraic counterpart to the differentiation process from Lie groupoids to Lie algebroids. [...]
2023 - 10.5565/PUBLMAT6712301
Publicacions matemàtiques, Vol. 67 Núm. 1 (2023) , p. 3-88 (Articles)  
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2.
38 p, 520.9 KB On Euler systems for the multiplicative group over general number fields / Burns, David (King's College London. Department of Mathematics) ; Daoud, Alexandre (King's College London. Department of Mathematics) ; Sano, Takamichi (Osaka Metropolitan University. Department of Mathematics) ; Seo, Soogil (Yonsei University. Department of Mathematics)
We formulate, and provide strong evidence for, a natural generalization of a conjecture of Robert Coleman concerning Euler systems for the multiplicative group over arbitrary number fields.
2023 - 10.5565/PUBLMAT6712302
Publicacions matemàtiques, Vol. 67 Núm. 1 (2023) , p. 89-126 (Articles)  
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3.
46 p, 570.1 KB Locally countable pseudovarieties / Almeida, Jorge (Universidade do Porto. Departamento de Matemática) ; Klíma, O. (Masaryk University. Department of Mathematics and Statistics)
The purpose of this paper is to contribute to the theory of profinite semigroups by considering the special class consisting of those all of whose finitely generated closed subsemigroups are countable, which are said to be locally countable. [...]
2023 - 10.5565/PUBLMAT6712303
Publicacions matemàtiques, Vol. 67 Núm. 1 (2023) , p. 127-172 (Articles)  
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4.
26 p, 419.7 KB Problems on characters : solvable groups / Navarro, Gabriel (Universitat de València. Departament de Matemàtiques)
I review some problems on characters of finite solvable groups, while introducing new ones.
2023 - 10.5565/PUBLMAT6712304
Publicacions matemàtiques, Vol. 67 Núm. 1 (2023) , p. 173-173-198 (Articles)  
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5.
59 p, 606.6 KB Limit groups over coherent right-angled Artin groups / Casals-Ruiz, Montserrat (IKERBASQUE. Zientziarako Euskal Fundazioa) ; Kazachkov, Ilya (IKERBASQUE. Zientziarako Euskal Fundazioa) ; Duncan, Andrew (Newcastle University. School of Mathematics, Statistics and Physics)
A new class of groups C, containing all coherent RAAGs and all toral relatively hyperbolic groups, is defined. It is shown that, for a group G in the class C, the Z[t]-exponential group GZ[t] may be constructed as an iterated centraliser extension. [...]
2023 - 10.5565/PUBLMAT6712305
Publicacions matemàtiques, Vol. 67 Núm. 1 (2023) , p. 199-199-257 (Articles)  
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6.
17 p, 382.1 KB On invariant rank two vector bundles on P2 / Marchesi, Simone (Universitat de Barcelona) ; Vallès, Jean (Université de Pau et des Pays de l'Adour)
In this paper we characterize the rank two vector bundles on P 2 which are invariant under the actions of the parabolic subgroups Gp := Stabp(PGL(3)) fixing a point in the projective plane, GL := StabL(PGL(3)) fixing a line, and when p ∈ L, the Borel subgroup B = Gp∩GL of PGL(3). [...]
2023 - 10.5565/PUBLMAT6712306
Publicacions matemàtiques, Vol. 67 Núm. 1 (2023) , p. 259-275 (Articles)  
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7.
134 p, 986.7 KB Coercivity for travelling waves in the Gross-Pitaevskii equation in R2 for small speed / Chiron, David (Université de Nice-Sophia Antipolis. Laboratoire de Mathématiques J. A. Dieudonné) ; Pacherie, Eliot (Université de Nice-Sophia Antipolis. Laboratoire de Mathématiques J. A. Dieudonné)
In a previous paper, we constructed a smooth branch of travelling waves for the 2-dimensional Gross-Pitaevskii equation. Here, we continue the study of this branch. We show some coercivity results, and we deduce from them the kernel of the linearized operator, a spectral stability result, as well as a uniqueness result in the energy space. [...]
2023 - 10.5565/PUBLMAT6712307
Publicacions matemàtiques, Vol. 67 Núm. 1 (2023) , p. 277-410 (Articles)  
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8.
35 p, 552.1 KB The embedding problem for Markov matrices / Casanellas i Rius, Marta (Universitat Politècnica de Catalunya. Departament de Matemàtiques) ; Fernández-Sánchez, Jesus (Universitat Politècnica de Catalunya. Departament de Matemàtiques) ; Roca-Lacostena, Jordi (Universitat Politècnica de Catalunya. Departament de Matemàtiques)
Characterizing whether a Markov process of discrete random variables has a homogeneous continuous-time realization is a hard problem. In practice, this problem reduces to deciding when a given Markov matrix can be written as the exponential of some rate matrix (a Markov generator). [...]
Characterizing whether a Markov process of discrete random variables has a homogeneous continuous-time realization is a hard problem. In practice, this problem reduces to deciding when a given Markov matrix can be written as the exponential of some rate matrix (a Markov generator). [...]
2023 - 10.5565/PUBLMAT6712308
Publicacions matemàtiques, Vol. 67 Núm. 1 (2023) , p. 411-445 (Articles)  
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9.
22 p, 412.0 KB Curvature of the completion of the space of Sasaki potentials / Franzinetti, Thomas (Sorbonne Université)
Given a compact Sasaki manifold, we endow the space of the Sasaki potentials with an analogue of the Mabuchi metric. We show that its metric completion is negatively curved in the sense of Alexandrov.
2023 - 10.5565/PUBLMAT6712309
Publicacions matemàtiques, Vol. 67 Núm. 1 (2023) , p. 447-447-468 (Articles)  
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10.
12 p, 290.6 KB Crystalline measures in two dimensions / Meyer, Yves (Université Paris-Saclay)
Some crystalline measures supported by a Delone set Λ ⊂ R2 are constructed in this note. This gives a new proof of a remarkable theorem by Pavel Kurasov and Peter Sarnak.
2023 - 10.5565/PUBLMAT6712310
Publicacions matemàtiques, Vol. 67 Núm. 1 (2023) , p. 469-480 (Articles)  
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