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Mostrando ítems 111-120 de 199
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Diofanto, Hilbert y Robinson: ¿Alguna relación entre ellos?
(Sociedad Canaria Isaac Newton de Profesores de Matemáticas, 2009-04)
A lo largo de la Historia son bastantes los matemáticos a los que no se les ha valorado su contribución. Éste es el caso de muchas mujeres matemáticas, que han realizado importantes trabajos pero cuyo reconocimiento no ha ...
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Some special types of developable ruled surface
(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 types of ruled surface, choosing one of the base curves or director curves as the focal curve of the ...
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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 CW–complexes whose universal covers are proper 2–equivalent as (strongly) locally finite ...
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Morse–Bott theory on posets and a homological Lusternik–Schnirelmann theorem
(World Scientific Publishing Company, 2021)
We develop Morse–Bott theory on posets, generalizing both discrete Morse–Bott theory for regular complexes and Morse theory on posets. Moreover, we prove a Lusternik– Schnirelmann theorem for general matchings on posets, ...
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Generators and closed classes of groups
(Universitat Autònoma de Barcelona, Departament de Matemàtiques, 2021)
We show that, in the category of groups, every singly-generated class which is closed under isomorphisms, direct limits, and extensions is also singly-generated under isomorphisms and direct limits, and in particular is ...
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Artículo
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B.-Y. Chen's inequality for submanifolds of generalized space forms
(Indian National Science Academy, 2007-06)
In this article, we investigate sharp inequalities involving δ-invariants for submanifolds in both generalized complex space forms and generalized Sasakian space forms, with arbitrary codimension.
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An algorithm to compute abelian subalgebras in linear algebras of upper-triangular matrices
(American Institute of Physics, 2009)
This paper deals with the maximal abelian dimension of the Lie algebra hn, of nxn upper-triangular matrices. Regarding this, we obtain an algorithm which computes abelian subalgebras of hn as well as its implementation ...
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Computational algorithm for obtaining Abelian subalgebras in Lie algebras
(World Academy of Science, Engineering and Technology, 2009)
The set of all abelian subalgebras is computationally obtained for any given finite-dimensional Lie algebra, starting from the nonzero brackets in its law. More concretely, an algorithm is described and implemented to ...
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Did Fátima de Madrid really exist?
(LAR Centre Press, 2016-02)
In this paper we firstly pose the question of whether Fátima de Madrid, a Spanish mathematician woman allegedly born in Madrid, X-XI centuries, really existed or, on the contrary, she is only a product of the imagination ...