Listar Artículos (Geometría y Topología) por título
Mostrando ítems 140-159 de 198
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On the existence of almost contact structure and the contact magnetic field
(Springer, 2009-10)In this short note we give a simple proof of the existence of an almost contact metric structure on any orientable ...
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On the Freudenthal extensions of proper confluent maps
(University of Houston, 2012)In this paper we study when Freudenthal extensions of proper maps preserve the (weak, semi) confluency. Also the extensions to the Alexandroff one-point compactificaton are considered.
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On the functoriality of cohomology of categories
(Elsevier, 2006-03)In this paper we show that the Baues-Wirsching complex used to define cohomology of categories is a 2-functor from a certain ...
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On the idempotency of some composite functors
(Springer, 2012-01)We present examples of localization functors whose composition with certain cellularization functors is not idempotent, and vice versa.
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On the locally finite chain algebra of a proper homotopy type
(Belgian Mathematical Society, 1996)In the classical paper [A-H] Adams-Hilton constructed a free chain algebra which is an important algebraic model of a ...
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On the topology of locally 2-connected Peano continua
(Rocky Mountain Mathematics Consortium, 2012)Several recent results by Thomassen ([23 The locally connected compatc metric spaces embeddable in the plane, Combinatorica ...
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On totally geodesic invariant submanifolds of an S-manifold
(Real Academia de Ciencias de Zaragoza, 1988)In [1] Blair, O.E.: 1970, J. Diff. Geom. 4, (155-167), S-manifolds, which reduce in a special case to Sasakian manifolds, ...
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On ξ-conformally flat contact metric manifolds
(Indian National Science Academy, 1997-06)In this paper, the notion of ξ-conformally flat on a contact metric structure is introduced and it is proved that any ...
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One-relator groups and proper 3-realizability
(European Mathematical Society, 2009)How different is the universal cover of a given finite 2-complex from a 3-manifold (from the proper homotopy viewpoint)? ...
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Optimal inequalities, contact delta-invariants and their applications
(Malaysian Mathematical Sciences Society, 2013)Associated with a k-tuple (n1, . . . , nk) ∈ S(2n + 1) with n ≥ 1, we define a contact δ-invariant, δc (n1, . . . , nk), ...
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Un paseo fotográfico por la vida de Sophus Lie
(Sociedad Colombiana de Matemáticas, 2010)It is quite a lot scarce the literature on the Norwegian mathematician Sophus Lie, in spite of being him, as the great ...
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Pedro de Lucuce y Ponce y las instituciones matemático-militares españolas del siglo XVIII
(Real Sociedad Matemática Española, 2013)Dos años después, vuelve a la sección de Historia de La Gaceta de la RSME el tema matemático-militar durante el siglo XVIII ...
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¿Perderse en un laberinto? No con las matemáticas
(Federación Iberoamericana de Sociedades de Educación Matemática, 2010-03)En este artículo se sugiere la posibilidad de introducir algunos temas de las Matemáticas de Secundaria o Bachillerato, ...
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Planteando problemas de forma poética
(Federación Iberoamericana de Sociedades de Educación Matemática, 2012-03)En este artículo se plantea la posibilidad de que el profesor de Matemáticas de Secundaria y Bachillerato utilice la poesía ...
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Polynomial braid combing
(Oxford University Press, 2018)We prove that, for n ≥ 3, the minimal dimension of a model of the classifying space of the braid group Bn, and of the pure braid group Pn, with respect to the family of virtually cyclic groups is n.
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Proper 2–equivalences between infinite ended finitely presented groups
(Mathematical Sciences Publishers, 2023-03-27)Recall that two finitely presented groups G and H are “proper 2–equivalent” if they can be realized by finite 2–dimensional ...
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Una propuesta para utilizar la Historia de las Matemáticas en las clases de Primaria y Secundaria
(Asociación de Profesores de Matemáticas de Andalucía, 2012)En este artículo, los autores proponen a los profesores de Matemáticas, principalmente de 5º y 6º de Primaria y 1º de ...
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Pyramidal values
(Springer, 2014-06)We propose and analyze a new type of values for cooperative TU-games, which we call pyramidal values. Assuming that the ...
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Quasi-isometries and proper homotopy: The quasi-isometry invariance of proper 3-realizability of groups
(American Mathematical Society, 2019-04-01)We recall that a finitely presented group G is properly 3-realizable if for some finite 2-dimensional CW-complex X with ...
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