Exploració per autor "Amorós Torrent, Jaume"
Ara es mostren els items 24-43 de 47
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Nonsingular models of universes in teleparallel theories
Haro Cases, Jaume; Amorós Torrent, Jaume (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
Amorós Torrent, Jaume (1995)
Article
Accés obert -
On the number of defining relations for nonfibered kaehler groups
Amorós Torrent, Jaume; Bauer-Catanese, Ingrid (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
Aresté Saló, Llibert; Amorós Torrent, Jaume; Haro Cases, Jaume (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
Amorós Torrent, Jaume; De Haro, Jaume; Odintsov, Sergei D. (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
Coltraro, Franco; Amorós Torrent, Jaume; Alberich Carramiñana, Maria; Torras, Carme (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
Amorós Torrent, Jaume (2008-02-20)
Audiovisual
Accés obertConferència enmarcada dintre de la Jornada Riemann -
Scaling solutions in quintessential inflation
Haro Cases, Jaume; Amorós Torrent, Jaume; Pan, Supriya (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
Haro Cases, Jaume; Amorós Torrent, Jaume; Pan, Supriya (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
Haro Cases, Jaume; Amorós Torrent, Jaume; Pan, Supriya (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
Amorós Torrent, Jaume; Folch Duran, Arnau; Carrera Vilanova, Miquel; López López, José; Granados García, Javier A.J. (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
Haro Cases, Jaume; Amorós Torrent, Jaume; Elizalde, Emilio (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
Amorós Torrent, Jaume; Braungardt, Volker; Vindel Losilla, Javier (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.
Amorós Torrent, Jaume; Bogomolov, Fedor; Katzarkov, Ludmil; Pantev, Tony (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
Amorós Torrent, Jaume (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
Haro Cases, Jaume; Amorós Torrent, Jaume; Aresté Saló, Llibert (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
Haro Cases, Jaume; Amorós Torrent, Jaume; Pan, Supriya (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 ... -
TOPOLOGIA ALGEBRAICA (Examen 2n quadrim)
Amorós Torrent, Jaume (Universitat Politècnica de Catalunya, 2007-06-01)
Examen
Accés restringit a la comunitat UPC -
Topologia Algebraica (Examen 2n quadrimestre)
Amorós Torrent, Jaume (Universitat Politècnica de Catalunya, 2007-07-03)
Examen
Accés restringit a la comunitat UPC -
Topologia. Apunts
Barja Yáñez, Miguel Ángel; Pascual Gainza, Pere; Roig Martí, Agustín; Carreras, Judit; Amorós Torrent, Jaume (Universitat Politècnica de Catalunya, 1998)
Apunts
Accés obert