Recent Submissions

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    Generalized Sasakian Space Forms Which Are Realized as Real Hypersurfaces in Complex Space Forms 

    Carriazo Rubio, Alfonso; Cho, Jong Taek; Martín Molina, Verónica (MDPI, 2020-05-29)
    We prove a classification theorem of the generalized Sasakian space forms which are realized as real hypersurfaces in complex space forms.
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    Metric f-Contact Manifolds Satisfying the (κ, μ)-Nullity Condition 

    Carriazo Rubio, Alfonso; Fernández Fernández, Luis Manuel; Loiudice, Eugenia (MDPI, 2020-06-02)
    We prove that if the f-sectional curvature at any point of a (2n+s) -dimensional metric f-contact manifold satisfying the ...
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    Simplicial Lusternik-Schnirelmann category 

    Fernández Ternero, Desamparados; Macías Virgós, Enrique; Minuz, Erica; Vilches Alarcón, José Antonio (Universidad Autónoma de Barcelona, 2019-01-01)
    The simplicial LS-category of a nite abstract simplicial complex is a new invariant of the strong homotopy type, de ned ...
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    Optimal inequalities, contact delta-invariants and their applications 

    Chen, Bang-Yen; Martín Molina, Verónica (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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    Bochner and conformal flatness on normal complex contact metric manifolds 

    David E. Blair; Martín Molina, Verónica (Springer, 2010-10-10)
    We will prove that normal complex contact metric manifolds that are Bochner flat must have constant holomorphic sectional ...
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    A closed form for slant submanifolds of generalized Sasakian space forms 

    Alegre Rueda, Pablo Sebastián; Barrera López, Joaquín; Carriazo Rubio, Alfonso (MDPI, 2019-12-13)
    The Maslov form is a closed form for a Lagrangian submanifold of Cm, and it is a conformal form if and only if M satisfies ...
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    An Application of Total-Colored Graphs to Describe Mutations in Non-Mendelian Genetics 

    Falcón Ganfornina, Raúl Manuel; Falcón Ganfornina, Óscar Jesús; Núñez Valdés, Juan (MDPI, 2019)
    Any gene mutation during the mitotic cell cycle of a eukaryotic cell can be algebraically represented by an isotopism of ...
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    Bi-slant submanifolds of para Hermitian manifolds 

    Alegre Rueda, Pablo Sebastián; Carriazo Rubio, Alfonso (MDPI, 2019-07-11)
    In this paper, we introduce the notion of bi-slant submanifolds of a para Hermitian manifold. They naturally englobe CR, semi-slant, and hemi-slant submanifolds. We study their first properties and present a whole gallery of examples.
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    Un ejemplo de teoría de bordismo equivalente al PL-bordismo 

    Quintero Toscano, Antonio Rafael (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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    Cellular covers of local groups 

    Flores Díaz, Ramón Jesús; Scherer, Jérôme (Springer, 2018-12)
    We prove that, in the category of groups, the composition of a cellularization and a localization functor need not be idempotent. This provides a negative answer to a question of Emmanuel Dror Farjoun.
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    Some special types of developable ruled surface 

    Alegre Rueda, Pablo Sebastián; Arslan, Kadri; Carriazo Rubio, Alfonso; Murathan, Cengizhan; Özturk, Günay (Hacettepe University (Faculty of Science), 2010)
    In this study we consider the focal curve Cγ of a space curve γ and its focal curvatures. We characterize some special ...
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    On certain anti-invariant submanifolds of an S-manifold 

    Cabrerizo Jaraíz, José Luis; Fernández Fernández, Luis Manuel (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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    CR-products of S-manifolds 

    Fernández Fernández, Luis Manuel (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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    Irreducible triangulations of the once-punctured torus 

    Lawrecenko, Serge; Sulanke, Thom; Villar Liñán, María Trinidad; Zgonnik, Lyudmila Vladimirovna; Chávez de Diego, María José (Sobolev Institute of Mathematics, 2018)
    A triangulation of a surface with fixed topological type is called irreducible if no edge can be contracted to a vertex ...
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    A historical perspective of the theory of isotopisms 

    Falcón Ganfornina, Raúl Manuel; Falcón Ganfornina, Óscar Jesús; Núñez Valdés, Juan (MDPI, 2018-08-03)
    In the middle of the twentieth century, Albert and Bruck introduced the theory of isotopisms of non-associative algebras ...
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    A classification of totally geodesic and totally umbilical Legendrian submanifolds of (κ, μ)-spaces 

    Carriazo Rubio, Alfonso; Martín Molina, Verónica; Vrancken, Luc (Springer, 2018)
    We present classifications of totally geodesic and totally umbilical Legendrian submanifolds of (κ, µ)-spaces with Boeckx ...
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    Normal approximations of regular curves and surfaces 

    Carriazo Rubio, Alfonso; Márquez García, María del Carmen; Ugail, Hassan (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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    Pyramidal values 

    Flores Díaz, Ramón Jesús; Molina Ferragut, Elisenda; Tejada Cazorla, Juan Antonio (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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    The cellular structure of the classifying spaces of finite groups 

    Flores Díaz, Ramón Jesús; Foote, Richard M. (Springer, 2011-08)
    In this paper we obtain a description of the BZ/p-cellularization (in the sense of Dror-Farjoun) of the classifying spaces of all finite groups, for all primes p.
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    New examples of generalized Sasakian-space-forms 

    Carriazo Rubio, Alfonso; Alegre Rueda, Pablo Sebastián; Özgür, Cihan; Sular, Sibel (Università di Torino, 2015)
    In this paper we study when a non-anti-invariant slant submanifold of a generalized Sasakian-space-form inherits such a ...

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