Browsing Geometría y Topología by Title
Now showing items 180-199 of 275
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Article
New relationships involving the mean curvature of slant submanifolds in S-space-forms
(Korean Mathematical Society, 2007)Relationships between the Ricci curvature and the squared mean curvature and between the shape operator associated with ...
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Article
Normal approximations of regular curves and surfaces
(Faculty of Sciences and Mathematics, University of Nis, Serbia, 2015)Bezier curves and surfaces are two very useful tools in Geometric Modeling, with many applications. In this paper, we will ...
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Article
Null pseudo-isotropic Lagrangian surfaces
(Polish Academy of Sciences, Institute of Mathematics, 2017)In this paper we will show that a Lagrangian, Lorentzian surface M 2 1 in a complex pseudo space form Mf2 1 (4c) is ...
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Article
Nullification and cellularization of classifying spaces of finite groups
(American Mathematical Society, 2007-04)In this note we discuss the effect of the BZ/p-nullification PBZ/p and the BZ/p-cellularization CWBZ/p over classifying ...
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Article
Nullification functors and the homotopy type of the classifying space for proper bundles
(Mathematical Sciences Publishers, 2005-09)Let G be a discrete group for which the classifying space for proper G-actions is finite-dimensional. We find a space W ...
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Presentation
Obtaining combinatorial structures associated with low-dimensional Leibniz algebras
(2013)In this paper, we analyze the relation between Leibniz algebras and combinatorial structures. More concretely, we study ...
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Article
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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Article
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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Presentation
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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Article
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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Article
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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Article
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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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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Presentation
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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Article
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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Article
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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Article
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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Article
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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Article
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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Article
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.