Results 21 to 30 of about 9,440 (169)

On the Ricci tensor of real hypersurfaces of quaternionic projective space

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1996
We study some conditions on the Ricci tensor of real hypersurfaces of quaternionic projective space obtaining among other results an improvement of the main theorem in [9].
Juan De Dios Perez
doaj   +1 more source

The Invariant Two-Parameter Function of Algebras ψ

open access: yesMathematical and Computational Applications, 2019
At present, the research on invariant functions for algebras is very extended since Hrivnák and Novotný defined in 2007 the invariant functions ψ and φ as a tool to study the Inönü−Wigner contractions (IW ...
José María Escobar   +2 more
doaj   +1 more source

The theory of E. Mössel at the root of the plan governing a Gipuzkoan farm house model from the 15th century. Part 1

open access: yesEGA, 2020
Recent research results based on architectural analyses and dendrochronology have enabled the identification of a Gipuzkoan farm house model dating back to the middle of the 15th century. The analysis of several case studies has revealed the existence of
Ibon Telleria Julian   +2 more
doaj   +1 more source

Uma (re)construção praxeológica no estudo de conteúdos da Geometria com alunos da Licenciatura em Matemática

open access: yesRevista de Ensino de Ciências e Matemática, 2018
Esta pesquisa de doutorado tomada como instrumento de construção do conhecimento e de ação reflexiva desenvolveu-se no Grupo de Estudo e Pesquisa em Didática e Metodologia em Educação Matemática do Programa de Pós-Graduação em Ensino de Ciências e ...
Gladiston dos Anjos Almeida   +1 more
doaj   +1 more source

What Does Intarsia Say? Materiality and Spirituality in the Urbino Studiolo☆

open access: yesRenaissance Studies, EarlyView.
Abstract Upon entering the Urbino studiolo of Federico da Montefeltro, the visitor is struck by a material‐charged environment. Surprisingly, only a few scholars have addressed one prominent aspect of the decorative scheme, namely, the feature of intarsia as a medium. Even so, it remains on the sidelines of the discussion.
Matan Aviel
wiley   +1 more source

Computing abelian subalgebras for linear algebras of upper-triangular matrices from an algorithmic perspective

open access: yesAnalele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2016
In this paper, the maximal abelian dimension is algorithmically and computationally studied for the Lie algebra hn, of n×n upper-triangular matrices. More concretely, we define an algorithm to compute abelian subalgebras of hn besides programming its ...
Ceballos Manuel   +2 more
doaj   +1 more source

Formas de paraboloides hiperbólicos en la arquitectura en Chile a mediados del siglo XX: materialización de la geometría en la escala del espacio

open access: yesInformes de la Construccion, 2023
El presente artículo es parte de nuestra investigación acerca del tema laminar de mediados del siglo XX en Chile, y se centra en obras y proyectos con paraboloides hiperbólicos poco estudiados pero que nuestra hipótesis valora al crear alternativas a ...
Branko Susa Mahuzier
doaj   +1 more source

The cosymplectic Chern–Hamilton conjecture

open access: yesJournal of the London Mathematical Society, Volume 113, Issue 2, February 2026.
Abstract In this paper, we study the Chern–Hamilton energy functional on compact cosymplectic manifolds, fully classifying in dimension 3 those manifolds admitting a critical compatible metric for this functional. This is the case if and only if either the manifold is co‐Kähler or if it is a mapping torus of the 2‐torus by a hyperbolic toral ...
Søren Dyhr   +3 more
wiley   +1 more source

The crucial role of meshing in computational fluid dynamics simulations for organic geometries in paleobiology: Describing fluid dynamics performance through best practices

open access: yesMethods in Ecology and Evolution, Volume 16, Issue 10, Page 2170-2194, October 2025.
Abstract Computational fluid dynamics (CFD) has become an essential tool for studying fluid interactions in biological systems. While widely used in engineering, its application in the natural sciences, particularly in paleobiology, remains limited due to the challenges of meshing complex organic geometries.
Matheo López‐Pachón   +1 more
wiley   +1 more source

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