Listar Geometría y Topología por título
Mostrando ítems 185-204 de 274
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Artículo
On abelian subalgebras and ideals of maximal dimension in supersolvable Lie algebras
(Elsevier, 2014-02)In this paper, the main objective is to compare the abelian subalgebras and ideals of maximal dimension for finite-dimensional ...
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Artículo
On certain anti-invariant submanifolds of an S-manifold
(Sociedade Portuguesa de Matemática, 1993)In this paper, the geometry of certain anti-invariant submanifolds of an S-manifold, namely those which are normal to the structure vector fields, is studied.
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Ponencia
On generalized Sasakian-space-forms
(2004)We study contact metric and trans-Sasakian generalized Sasakian-space-forms. We also give some interesting examples of generalized Sasakian-space-forms by using warped products and conformal changes of metric.
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Artículo
On localizations of quasi-simple groups with given countable center
(EMS Press, 2020-10-22)A group homomorphism � : � → � i:H→G is a localization of � H, if for every homomorphism � : � → � φ:H→G ...
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Artículo
On manifolds with nonhomogeneous factors
(Springer, 2012-06)We present simple examples of finite-dimensional connected homogeneous spaces (they are actually topological manifolds) ...
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Artículo
On pseudo-Einstein hypersurfaces of ℋ2n+s
(Indian National Science Academy, 1996-05)In this paper, some properties of the geometry of pseudo-Einstein hypersurfaces of the S-manifold ℋ 2n+s are studied and a theorem concerning their principal curvatures is obtained.
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Artículo
On slant submanifolds of neutral Kaehler manifolds
(Mathematical Society of the Republic of China, 2010-04)An indefinite Riemannian manifold is called neutral it its index is equal to one half of its dimension and an indefinite ...
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Ponencia
On surfaces in digital topology
(1995)In R. Ayala, E. Domínguez, A.R. Francés, A. Quintero, J. Rubio. A Polyhedral Approach to Digital Topology a new framework ...
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Artículo
On the classifying space for proper actions of groups with cyclic torsion
(De Gruyter, 2014-01)In this paper we introduce a common framework for describing the topological part of the Baum-Connes conjecture for a ...
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Artículo
On the connectivity of skeletons of pseudomanifolds with boundary
(Mathematical Institute, Academy of Sciences of the Czech Republic, 2002)In this note we show that 1-skeletons and 2-skeletons of n-pseudomanifolds with full boundary are (n+ 1)-connected graphs and n-connected 2-complexes, respectively. This generalizes previous results due to Barnette and Woon.
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Artículo
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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Artículo
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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Artículo
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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Artículo
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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Artículo
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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Artículo
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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Artículo
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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Artículo
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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Artículo
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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Artículo
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), ...