Listar Artículos (Geometría y Topología) por fecha de publicación
Mostrando ítems 1-20 de 198
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Un ejemplo de teoría de bordismo equivalente al PL-bordismo
(Academia de Ciencias Exactas, Físicas, Químicas y Naturales de Zaragoza, 1983)In this paper we define the CPL-manifolds and we prove, by using a desingularization procedure, that these objects give a ...
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Doble suspensión de bolas de homología
(Real Academia de Ciencias Exactas, Físicas y Naturales, 1986)Extendemos los teoremas de doble suspensión de Edwards y Cannon a ciertas bolas de homología simplemente conexas. Como ...
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A note on F-sectional curvatures of S-manifolds
(Real Academia de Ciencias de Zaragoza, 1987)This paper presents sorne characterizations of S-manifolds whose invariant f- sectional curvature is constant. The ...
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Algunos resultados sobre el bordismo de variedades de homología
(Real Academia de Ciencias Exactas, Físicas y Naturales, 1987)En este artículo probamos que las variedades de homología (HML-variedades) definen una teoría de bordismo singular que es ...
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Exponential law for uniformly continous proper maps
(Universitat Autònoma de Barcelona, 1988)The purpose of this note is to prove the exponential law for uniformly continuous proper maps.
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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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Approximation axiomatique à la théorie du bordisme
(Université de Picardie Jules Verne, 1989)This paper gives an axiomatical approximation to Bordism Theory. It proves those properties of a geometrical nature that a class of models must satisfy to develop a bordism theory in an abstract category.
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CR-products of S-manifolds
(Sociedade Portuguesa de Matemática, 1990)In this paper certain CR-submanifolds namely the CR-products, are studied. A characterization theorem is given and the case of CR-products of S-manifolds whose invariant f-sectional curvature is constant, is investigated.
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Lusternik-Schnirelmann invariants in proper homotopy theory
(University of California, 1992)We introduce and study proper homotopy invariants of the Lusternik-Schnirelmann type, p-cat (-), p-Cat(-), and cat e(-) ...
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A note on the homotopical characterization of Rn
(Universitat de Barcelona, 1992)This note gives conditions which assure that the one-point compactification of an open manifold is a manifold. This result is used to show that the homotopical characterization of Rn (n ≥ 4) can be derived from the Poincaré Conjecture.
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A classification of totally F-umbilical submanifolds of an S-manifold
(Soochow University, Department of Mathematics, 1992-04)In this note a classification theorem for totally f-umbilical submanifolds of an S-space form is obtained.
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Characterization of complex filiform Lie algebras of dimension 0 according to whether they are or not derived from others
(Universidad de Zaragoza, 1993)In this paper, we characterize those Complex Filiform Lie Algeoras of dimension 0 which are derived from other Solvable ...
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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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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 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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Análisis de errores en la conceptualización y simbolización de ecuaciones diferenciales en alumnos de química
(Grupo editorial Iberoamérica, 1996-08)Este artículo recoge un análisis de los errores más frecuentes cometidos por estudiantes de Matemáticas de 2° curso de la ...
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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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A contact version of B.-Y. Chen's inequality and its applications to slant immersions
(Kyungpook National University, 1999)We establish a version of B.-Y. Chen’s inequality for a submanifold of a Sasakianspace-form, tangent to the structure ...
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Semi-slant submanifolds of a Sasakian manifold
(Springer, 1999-11)We define and study both bi-slant and semi-slant submanifolds of an almost contact metric manifold and, in particular, of ...
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Willmore Tori in a wide family of conformal structures on odd dimensional spheres
(Rocky Mountain Mathematics Consortium, 2000)We obtain a variable reduction principle for the Willmore variational problem in an ample class of conformal structures ...