Exploració per autor "Amorós Torrent, Jaume"
Ara es mostren els items 21-40 de 47
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Matter Bounce Scenario in F(T) gravity
(2016)
Article
Accés obertIt is shown that teleparallel F(T) theories of gravity combined with holonomy corrected Loop Quantum Cosmology (LQC) support a Matter Bounce Scenario (MBS) which is a potential alternative to the inflationary paradigm. The ... -
Monodromía geométrica en familias de curvas de género 4
(2012)
Capítol de llibre
Accés obertThe geometric mono dromy of a family of complex pro jective curves is equiv- alent to the mono dromy in the fundamental group of the b ers. When the family is one of branched covers of the pro jective line this mono ... -
Morse cell decomposition and parametrization of surfaces from point clouds
(Publicacions de la Universitat Jaume I, 2022)
Text en actes de congrés
Accés obertAn algorithm for the reconstruction of a surface from a point sample is presented. It proceeds directly from the point-cloud to obtain a cellular decomposition of the surface derived from a Morse function. No intermediate ... -
Nonsingular models of universes in teleparallel theories
(2013-02-14)
Article
Accés obertDifferent models of universes are considered in the context of teleparallel theories. Assuming that the universe is filled by a fluid with an equation of state P ¼ f ð Þ , for different teleparallel theories ... -
On the Malcev completion of Kähler groups
(1995)
Article
Accés obert -
On the number of defining relations for nonfibered kaehler groups
(1999-01)
Article
Accés obertWe present minimal bounds for the deficiency (least difference between numbers of generators and relations among all presentations of a group) of fundamental groups of quasiprojective manifolds which do not fiber over a ... -
Qualitative study in loop quantum cosmology
(2017-12-07)
Article
Accés obertThis work contains a detailed qualitative analysis, in general relativity and in loop quantum cosmology, of the dynamics in the associated phase space of a scalar field minimally coupled with gravity, whose potential mimics ... -
R+aR2 loop quantum cosmology
(2014-05-06)
Article
Accés obertWorking in Einstein frame, we introduce, in order to avoid singularities, holonomy corrections to the f(R)=R+aR2 model. We perform a detailed analytical and numerical study when holonomy corrections are taken into account ... -
Reconstruction of sampled surfaces with boundary via Morse theory
(European Association for Computer Graphics (Eurographics), 2023)
Text en actes de congrés
Accés obertWe study the perception problem for garments (e.g. a pair of pants) using tools from computational topology: the identification of their geometry and position from point-cloud samples, as obtained e.g. with 3D scanners. ... -
Riemann i les funcions de variable complexa
(2008-02-20)
Audiovisual
Accés obertConferència enmarcada dintre de la Jornada Riemann -
Scaling solutions in quintessential inflation
(springer-Verlag, 2020-05)
Article
Accés obertIn quintessence scalar field theories, the presence of scaling solutions are important during the radiation and matter epoch due to having their attractor character. Usually, it is assumed that the initial conditions of ... -
Simple inflationary quintessential model
(2016-04-12)
Article
Accés obertIn the framework of a flat Friedmann-Lemaitre-Robertson-Walker geometry, we present a nongeodesically past complete model of our Universe without the big bang singularity at finite cosmic time, describing its evolution ... -
Simple inflationary quintessential model. II. Power law potentials
(American Physical Society, 2016-09-21)
Article
Accés obertThe present work is a sequel of our previous work [Phys. Rev. D 93, 084018 (2016)] which depicted a simple version of an inflationary quintessential model whose inflationary stage was described by a Higgs-type potential ... -
Singular spectrum analysis filtering and Fourier inversion: an efficient and fast way to improve resolution and quality of current density maps with low-cost Hall scanning systems
(2019-01-01)
Article
Accés obertMeasurement Science and Technology Paper Singular spectrum analysis filtering and Fourier inversion: an efficient and fast way to improve resolution and quality of current density maps with low-cost Hall scanning systems ... -
Sudden singularities in semiclassical gravity
(2012-06-19)
Article
Accés restringit per política de l'editorialIt has been claimed in a recent paper [J. D. Barrow, A. B. Batista, J. C. Fabris, M. J. S. Houndjo, and G. Dito, Phys. Rev. D 84, 123518 (2011).] that sudden singularities will survive in semiclassical gravity. This issue ... -
Symplectic Lefschetz fibrations of curves as gonal coverings
(2013-08)
Article
Accés obertWe show that after a finite base change every symplectic Lefschetz fibration f : X ¿ B of genus g > 3 curves over a closed oriented surface becomes a finite covering of degree g 2 + 1 or g 2 + 32 of a family of spheres ... -
Symplectic Lefschetz fibrations with arbitrary fundamental groups.
(1998)
Article
Accés obertIn this paper we give an explicit costruction of a symplectic Lefschetz fibration whose total space is a smooth compact four dimensional manifold with a prescribed fundamental group. We also study the numerical properties ... -
The fundamental group of Kaehler manifolds
(1997)
Article
Accés obertIt studies the fundamental group of complex algebraic varieties, in its Betti, Hodge and de Rham realizations. This study has been carried out both in the absolute case, i.e. fundamental groups of such varieties, and in ... -
The matter-ekpyrotic bounce scenario in Loop Quantum Cosmology
(2017-09-01)
Article
Accés obertWe will perform a detailed study of the matter-ekpyrotic bouncing scenario in Loop Quantum Cosmology using the methods of the dynamical systems theory. We will show that when the background is driven by a single scalar ... -
The Peebles–Vilenkin quintessential inflation model revisited
(springer-Verlag, 2019-06-01)
Article
Accés obertWe review the well-known Peebles–Vilenkin (PV) quintessential inflation model and discuss its possible improvements in agreement with the recent observations. The improved PV model depends only on two parameters: the ...
