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Dipòsit Digital de Documents de la UAB 16 registres trobats  1 - 10següent  anar al registre: La cerca s'ha fet en 0.01 segons. 
1.
8 p, 361.3 KB A curvature-free Log(2k-1) theorem / Balacheff, Florent Nicolas (Universitat Autònoma de Barcelona. Departament de Matemàtiques) ; Merlin, Louis (RWTH Aachen University. Department of Mathematics)
This paper presents a curvature-free version of the Log(2k-1) Theorem of Anderson, Canary, Culler, and Shalen [J. Differential Geometry 44 (1996), pp. 738-782]. It generalizes a result by Hou [J. Differential Geometry 57 (2001), no. [...]
2023 - 10.1090/proc/15280
Proceedings of the American Mathematical Society, Vol. 151, Num. 6 (March 2023) , p. 2429-2434  
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2.
2 p, 755.5 KB Explorant l'Univers : curvatura espacial i termodinàmica / Pavón Coloma, Diego (Universitat Autònoma de Barcelona. Departament de Física)
Un nou estudi de la UAB revela que l'evolució de l'univers és més misteriosa del que es pensava. Utilitzant la segona llei de la termodinàmica i les dades observacionals, investigadors del Departament de Física han explorat la curvatura espacial de l'univers. [...]
Un nuevo estudio de la UAB revela que la evolución del universo es más misteriosa de lo que se pensaba. Utilizando la segunda ley de la termodinámica y datos observacionales, investigadores del Departamento de Física han explorado la curvatura espacial del universo. [...]
A new study from reveals that the evolution of the universe is more mysterious than previously thought. Using the second law of thermodynamics and observational data, researchers from the Department of Physics have explored the spatial curvature of the universe. [...]
2023
UAB divulga, Novembre 2023
3 documents
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3.
22 p, 412.0 KB Curvature of the completion of the space of Sasaki potentials / Franzinetti, Thomas (Sorbonne Université)
Given a compact Sasaki manifold, we endow the space of the Sasaki potentials with an analogue of the Mabuchi metric. We show that its metric completion is negatively curved in the sense of Alexandrov.
2023 - 10.5565/PUBLMAT6712309
Publicacions matemàtiques, Vol. 67 Núm. 1 (2023) , p. 447-447-468 (Articles)  
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4.
Flow curvature manifold and energy of generalized Liénard systems / Ginoux, Jean-Marc (Centre National de la Recherche Scientifique. Université de Toulon) ; Lebiedz, Dirk (Ulm University. Institute of Numerical Mathematics) ; Meucci, Riccardo (Istituto Nazionale di Ottica) ; Llibre, Jaume (Universitat Autònoma de Barcelona. Departament de Matemàtiques)
In his famous book entitled Theory of Oscillations, Nicolas Minorsky wrote: "each time the system absorbs energy the curvature of its trajectory decreases and vice versa". By using the Flow Curvature Method, we establish that, in the ε-vicinity of the slow invariant manifold of generalized Liénard systems, the curvature of trajectory curve increases while the energy of such systems decreases. [...]
2022 - 10.1016/j.chaos.2022.112354
Chaos, solitons and fractals, Vol. 161 (August 2022) , art. 112354  
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5.
11 p, 1.0 MB The dynamics of shapes of vesicle membranes with time dependent spontaneous curvature / Barrio, Rafael A. (Universidad Nacional Autónoma de México. Instituto de Física) ; Alarcón Cor, Tomás (Universitat Autònoma de Barcelona. Departament de Matemàtiques) ; Hernández-Machado, Aurora (Universitat de Barcelona)
We study the time evolution of the shape of a vesicle membrane under time-dependent spontaneous curvature by means of phase-field model. We introduce the variation in time of the spontaneous curvature via a second field which represents the concentration of a substance that anchors with the lipid bilayer thus changing the local curvature and producing constriction. [...]
2020 - 10.1371/journal.pone.0227562
PloS one, Vol. 15, Num. 1 (January 2020) , art. e0227562  
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6.
29 p, 568.3 KB Global dynamics of Hořava-Lifshitz cosmology with non-zero curvature and a wide range of potentials / Gao, Fabao (Universitat Autònoma de Barcelona. Departament de Matemàtiques) ; Llibre, Jaume (Universitat Autònoma de Barcelona. Departament de Matemàtiques)
The global dynamics of a cosmological model based on Hořava-Lifshitz gravity in the presence of curvature is described by using the qualitative theory of differential equations.
2020 - 10.1140/epjc/s10052-020-7714-3
The European Physical Journal. C, Particles and Fields, Vol. 80, Issue 2 (February 2020) , art. 137
2 documents
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7.
15 p, 584.1 KB Characterization of Sobolev-Slobodeckij spaces using geometric curvature energies / Dąbrowski, Damian (University of Warsaw. Faculty of Mathematics, Informatics, and Mechanics)
We give a new characterization of Sobolev-Slobodeckij spaces W1+s,pfor n/p < 1+s, where n is the dimension of the domain. To achieve this we introduce a family of curvature energies inspired by the classical concept of integral Menger curvature. [...]
2019 - 10.5565/PUBLMAT6321907
Publicacions matemàtiques, Vol. 63 Núm. 2 (2019) , p. 663-677 (Articles)  
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8.
10 p, 449.9 KB Strategies to Ascertain the Sign of the Spatial Curvature / Ferreira, Pedro C. (Universidade Federal do Rio Grande do Norte. Escola de Ciências e Tecnologia) ; Pavón Coloma, Diego (Universitat Autònoma de Barcelona. Departament de Física)
The second law of thermodynamics, in the presence of gravity, is known to hold at small scales, as in the case of black holes and self-gravitating radiation spheres. Using the Friedmann-Lemaître-Robertson-Walker metric and the history of the Hubble factor, we argue that this law also holds at cosmological scales. [...]
2016 - 10.3390/universe2040027
Universe, Vol. 2 Núm. 4 (November 2016) , p. 1-10  
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9.
15 p, 728.8 KB The flow curvature method applied to canard explosion / Ginoux, Jean-Marc (Université du Sud(France). Laboratoire Protee) ; Llibre, Jaume (Universitat Autònoma de Barcelona. Departament de Matemàtiques)
The aim of this work is to establish that the bifurcation parameter value leading to a canard explosion in dimension two obtained by the so-called Geometric Singular Perturbation Method can be found according to the Flow Curvature Method. [...]
2011 - 10.1088/1751-8113/44/46/465203
Journal of Physics. A. Mathematical and General, Vol. 44 (2011) , p. 465203  
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10.
31 p, 287.8 KB Finite curvature of arc length measure implies rectifiability : a new proof / Tolsa Domènech, Xavier (Institució Catalana de Recerca i Estudis Avançats)
If E C C is a set with finite length and finite curvature, then E is rectifiable. This fact, proved by David and Léger in 1999, is one of the basic ingredients for the proof of Vitushkin's conjecture. [...]
2005 - 10.1512/iumj.2005.54.2746
Indiana University mathematics journal, Vol. 54, No. 4 (2005) , p. 1075-1105  
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