Publicacions matemàtiques

Publicacions matemàtiques Encontrados 14 registros  La búsqueda tardó 0.01 segundos. 
1.
57 p, 664.2 KB Uniqueness property for 2-dimensional minimal cones in R3 / Liang, Xiangyu (Beihang University. School of Mathematics)
In this article we treat two closely related problems: 1) the upper semicontinuity property for Almgren minimal sets in regions with regular boundary; and 2) the uniqueness property for all the 2-dimensional minimal cones in R3 . [...]
2021 - 10.5565/publicacionsmatematiques.v65i1.383612
Publicacions matemàtiques, Vol. 65 Núm. 1 (2021) , p. 3-59 (Articles)  
2.
21 p, 382.1 KB Isoperimetric cones and minimal solutions of partial overdetermined problems / Pacella, Filomena (Sapienza Università di Roma. Dipartimento di Matematica) ; Tralli, Giulio (Università di Padova. Dipartimento d'Ingegneria Civile e Ambientale (DICEA))
In this paper we consider a partial overdetermined mixed boundary value problem in domains inside a cone as in [18]. We show that, in cones having an isoperimetric property, the only domains which admit a solution and which minimize a torsional energy functional are spherical sectors centered at the vertex of the cone. [...]
2021 - 10.5565/publicacionsmatematiques.v65i1.383647
Publicacions matemàtiques, Vol. 65 Núm. 1 (2021) , p. 61-81 (Articles)  
3.
45 p, 595.0 KB Summability in a monomial for some classes of singularly perturbed partial differential equations / Carrillo Torres, Sergio Alejandro (Universidad Sergio Arboleda (Bogotà, Colòmbia). Escuela de Ciencias Exactas e Ingeniería)
The aim of this paper is to continue the study of asymptotic expansions and summability in a monomial in any number of variables, as introduced in [3, 15]. In particular, we characterize these expansions in terms of bounded derivatives and we develop Tauberian theorems for the summability processes involved. [...]
2021 - 10.5565/publicacionsmatematiques.v65i1.383651
Publicacions matemàtiques, Vol. 65 Núm. 1 (2021) , p. 83-127 (Articles)  
4.
12 p, 339.1 KB Acyclic 2-dimensional complexes and Quillen's conjecture / Piterman, Kevin Iván (Universidad de Buenos Aires. Departamento de Matemática) ; Sadofschi Costa, Iván (Universidad de Buenos Aires. Instituto de Matematica Luis Santaló) ; Viruel Arbáizar, Antonio (Universidad de Málaga. Departamento de Álgebra, Geometría y Topología)
Let G be a finite group and Ap(G) be the poset of nontrivial elementary abelian p-subgroups of G. Quillen conjectured that Op(G) is nontrivial if Ap(G) is contractible. We prove that Op(G) 6= 1 for any group G admitting a G-invariant acyclic p subgroup complex of dimension 2. [...]
2021 - 10.5565/PUBLMAT6512104
Publicacions matemàtiques, Vol. 65 Núm. 1 (2021) , p. 129-140 (Articles)  
5.
23 p, 372.3 KB On the Galois correspondence for Hopf Galois structures arising from finite radical algebras and Zappa-Szép products / Childs, Lindsay N. (University at Albany)
Let L/K be a G-Galois extension of fields with an H-Hopf Galois structure of type N. We study the Galois correspondence ratio GC(G, N), which is the proportion of intermediate fields E with K ⊆ E ⊆ L that are in the image of the Galois correspondence for the H-Hopf Galois structure on L/K. [...]
2021 - 10.5565/publicacionsmatematiques.v65i1.383689
Publicacions matemàtiques, Vol. 65 Núm. 1 (2021) , p. 141-163 (Articles)  
6.
77 p, 721.6 KB Definable coaisles over rings of weak global dimension at most one / Bazzoni, Silvana (Universit'a di Padova (Padova, Italia). Dipartimento di Matematica) ; Hrbek, Michal (Czech Academy of Sciences. Institute of Mathematics)
In the setting of the unbounded derived category D(R) of a ring R of weak global dimension at most one we consider t-structures with a definable coaisle. The t-structures among these which are stable (that is, the t-structures which consist of a pair of triangulated subcategories) are precisely the ones associated to a smashing localization of the derived category. [...]
2021 - 10.5565/publicacionsmatematiques.v65i1.383692
Publicacions matemàtiques, Vol. 65 Núm. 1 (2021) , p. 165-241 (Articles)  
7.
27 p, 418.0 KB Lower central words in finite p-groups / de las Heras, Iker (Euskal Herriko Unibertsitatea (UPV/EHU). Zientzia eta Teknologia Fakultatea, Matematika Saila) ; Morigi, Marta (Universit'a di Bologna (Bolonia, Italia). Dipartimento di Matematica)
It is well known that the set of values of a lower central word in a group G need not be a subgroup. For a fixed lower central word γr and for p ≥ 5, Guralnick showed that if G is a finite p-group such that the verbal subgroup γr(G) is abelian and 2-generator, then γr(G) consists only of γr-values. [...]
2021 - 10.5565/publicacionsmatematiques.v65i1.383697
Publicacions matemàtiques, Vol. 65 Núm. 1 (2021) , p. 243-269 (Articles)  
8.
20 p, 358.1 KB Normal sequences with given limits of multiple ergodic averages / Liao, Lingmin (Université Paris-Est Creteil) ; Rams, Michal (Polish Academy of Sciences (Varsóvia, Polonia).Institute of Mathematics.)
We are interested in the set of normal sequences in the space {0, 1} N with a given frequency of the pattern 11 in the positions k, 2k. The topological entropy of such sets is determined.
2021 - 10.5565/publicacionsmatematiques.v65i1.383983
Publicacions matemàtiques, Vol. 65 Núm. 1 (2021) , p. 271-290 (Articles)  
9.
17 p, 329.1 KB Invariant surfaces for toric type foliations in dimension three / Cano Torres, Felipe (Universidad de Valladolid. Departamento de Algebra, Análisis Matemático, Geometría y Topología) ; Molina-Samper, Beatriz (Universidad de Valladolid. Departamento de Algebra, Análisis Matemático, Geometría y Topología)
A foliation is of toric type when it has a combinatorial reduction of singularities. We show that every toric type foliation on (C3, 0) without saddle-nodes has invariant surface. We extend the argument of Cano-Cerveau for the nondicritical case to the compact dicritical components of the exceptional divisor. [...]
2021 - 10.5565/publicacionsmatematiques.v65i1.383986
Publicacions matemàtiques, Vol. 65 Núm. 1 (2021) , p. 291-307 (Articles)  
10.
10 p, 280.1 KB Iteration of functions and contractibility of acyclic 2-complexes / Leary, Ian J. (University of Southampton. School of Mathematical Sciences.)
We show that there can be no algorithm to decide whether infinite recursively described acyclic aspherical 2-complexes are contractible. We construct such a complex that is contractible if and only if the Collatz conjecture holds.
2021 - 10.5565/PUBLMAT6512110
Publicacions matemàtiques, Vol. 65 Núm. 1 (2021) , p. 309-318 (Articles)  
11.
15 p, 385.2 KB Uniform a priori estimates for positive solutions of higher order Lane-Emden equations in Rn / Dai, Wei (Beihang University (BUAA) (Beijing, Xina). School of Mathematical Sciences) ; Duyckaerts, Thomas (Université Sorbonne, Institut Galilée)
In this paper we study the existence of uniform a priori estimates for positive solutions to Navier problems of higher order Lane-Emden equations (0. 1)(−∆)mu(x) = u p (x), x ∈ Ω, for all large exponents p, where Ω ⊂ Rn is a star-shaped or strictly convex bounded domain with C2m−2 boundary, n ≥ 4, and 2 ≤ m ≤ n 2 . [...]
2021 - 10.5565/publicacionsmatematiques.v65i1.383990
Publicacions matemàtiques, Vol. 65 Núm. 1 (2021) , p. 319-333 (Articles)  
12.
27 p, 758.2 KB Embedding BMO into weighted BMO / Osekowski, Adam (University of Warsaw (Polònia). Department of Mathematics, Informatics and Mechanics)
2021 - 10.5565/publicacionsmatematiques.v65i1.384142
Publicacions matemàtiques, Vol. 65 Núm. 1 (2021) , p. 335-361 (Articles)  
13.
26 p, 450.7 KB Local rigidity, bifurcation, and stability of Hf-hypersurfaces in weighted Killing warped products / Velásquez, Marco Antonio (Universidade Federal de Campina Grande. Departamento de Matemática) ; Lima, Henrique F. de (Universidade Federal de Campina Grande. Departamento de Matemática) ; Ramalho, Andre F. A. (Universidade Federal de Campina Grande. Departamento de Matemática)
In a weighted Killing warped product Mn f ×ρR with warping metric h , iM+ρ2 dt, where the warping function ρ is a real positive function defined on Mn and the weighted function f does not depend on the parameter t ∈ R, we use equivariant bifurcation theory in order to establish sufficient conditions that allow us to guarantee the existence of bifurcation instants, or the local rigidity for a family of open sets {Ωγ}γ∈I whose boundaries ∂Ωγ are hypersurfaces with constant weighted mean curvature. [...]
2021 - 10.5565/publicacionsmatematiques.v65i1.384462
Publicacions matemàtiques, Vol. 65 Núm. 1 (2021) , p. 363-388 (Articles)  
14.
19 p, 1.7 MB Relating second order geometry of manifolds through projections and normal sections / Benedini Riul, Pedro (Universidade Federal de S˜ao Carlos. Departamento de Matem'atica) ; Oset Sinha, Raul (Universitat de València. Departament de Matemàtiques)
We use normal sections to relate the curvature locus of regular (resp. singular corank 1) 3-manifolds in R6 (resp. R5) with regular (resp. singular corank 1) surfaces in R5 (resp. R4 ). For example, we show how to generate a Roman surface by a family of ellipses different to Steiner's way. [...]
2021 - 10.5565/publicacionsmatematiques.v65i1.384546
Publicacions matemàtiques, Vol. 65 Núm. 1 (2021) , p. 389-407 (Articles)  

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