Results 31 to 40 of about 752 (105)
On Integral Manifolds for Leibniz Algebras
Algebra, Volume 2014, Issue 1, 2014., 2014 We discuss several partial solutions to the so‐called “coquecigrue problem” of Loday; these solutions parallel, but also generalize in several directions, the classical Lie group‐Lie algebra correspondence. Our study highlights some clear similarities between the split and nonsplit cases and leads us to a general unifying scheme that provides an answer
Juan Monterde, Fausto Ongay, Pu Zhang
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La conjetura de Poincaré: Problema resuelto tras un siglo de nuevas ideas y continuo trabajo
Mètode Science Studies Journal: Annual Review, 2018 La conjetura de Poincaré es un problema topológico, establecido en 1904 por el matemático francés Henri Poincaré, que caracteriza de una manera muy sencilla la esfera tridimensional.
María Teresa Lozano Imízcoz
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Smooth Approximation of Lipschitz Functions on Finsler Manifolds
Journal of Function Spaces, Volume 2013, Issue 1, 2013., 2013 We study the smooth approximation of Lipschitz functions on Finsler manifolds, keeping control on the corresponding Lipschitz constants. We prove that, given a Lipschitz function f : M → ℝ defined on a connected, second countable Finsler manifold M, for each positive continuous function ε : M → (0, ∞) and each r > 0, there exists a C1‐smooth Lipschitz ...
M. I. Garrido +3 more
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On some properties of the asymptotic Samuel function
Mathematische Nachrichten, Volume 298, Issue 7, Page 2401-2423, July 2025.Abstract The asymptotic Samuel function generalizes to arbitrary rings the usual order function of a regular local ring. Here, we explore some natural properties in the context of excellent, equidimensional rings containing a field. In addition, we establish some results regarding the Samuel slope of a local ring.
A. Bravo, S. Encinas, J. Guillán‐Rial
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Quasicoincidence for intuitionistic fuzzy points
International Journal of Mathematics and Mathematical Sciences, Volume 2005, Issue 10, Page 1539-1542, 2005., 2005 The introduction of intuitionistic fuzzy sets is due to K. T. Atanassov, who also proposed some problems about this subject. D. Çoker defined the intuitionistic fuzzy topological spaces and, with some coworkers, studied these spaces. In this paper, we define and study the notion of quasicoincidence for intuitionistic fuzzy points and obtain a ...
Francisco Gallego Lupiáñez
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Espacios de violencia, espacios del habitar
Nóesis, 2020 En este texto buscamos mostrar la necesidad de reconsiderar el espacio como categoría fundamental para evaluar lo común y la violencia que actualmente se ejerce contra éste.
Arturo Romero Contreras
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On totally umbilical and minimal surfaces of the Lorentzian Heisenberg groups
Mathematische Nachrichten, Volume 298, Issue 6, Page 1922-1942, June 2025.Abstract This paper has manifold purposes. We first introduce a description of the Gauss map for submanifolds (both spacelike and timelike) of a Lorentzian ambient space and relate the conformality of the Gauss map of a surface to total umbilicity and minimality.
Giovanni Calvaruso +2 more
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Focal decompositions for linear differential equations of the second order
Abstract and Applied Analysis, Volume 2003, Issue 14, Page 813-821, 2003., 2003 Focal decomposition associated to an ordinary differential equation of the second order is a partition of the set of all two‐points boundary value problems according to the number of their solutions. Two equations are called focally equivalent if there exists a homomorphism of the set of two‐points problems to itself such that the image of the focal ...
L. Birbrair +2 more
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Pulso: Revista de Educación, 2011 Presentamos una guía matemática, evolutiva y didáctica para estudiar el juego de construcción en la Educación Infantil y reflexionar sobre las posibilidades que ofrece para el aprendizaje de las matemáticas.
Carlos de Castro Hernández +2 more
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Zero‐curvature subconformal structures and dispersionless integrability in dimension five
Journal of the London Mathematical Society, Volume 110, Issue 6, December 2024.Abstract We extend the recent paradigm “Integrability via Geometry” from dimensions 3 and 4 to higher dimensions, relating dispersionless integrability of partial differential equations to curvature constraints of the background geometry. We observe that in higher dimensions on any solution manifold, the symbol defines a vector distribution equipped ...
Boris Kruglikov, Omid Makhmali
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