Zobrazeno 1 - 8
of 8
pro vyhledávání: '"Alejandro Jiménez"'
Autor:
Bello-Morales, Antonio G., Jiménez, Jose Beltrán, Cano, Alejandro Jiménez, Maroto, Antonio L., Koivisto, Tomi S.
Theories formulated in the arena of teleparallel geometries are generically plagued by ghost-like instabilities or other pathologies that are ultimately caused by the breaking of some symmetries. In this work, we construct a class of ghost-free theor
Externí odkaz:
http://arxiv.org/abs/2406.19355
The intrinsic presence of ghosts in the symmetric teleparallel framework is elucidated. We illustrate our general arguments in $f(\mathbb{Q})$ theories by studying perturbations in the three inequivalent spatially flat cosmologies. Two of these branc
Externí odkaz:
http://arxiv.org/abs/2311.04201
Publikováno v:
Phys. Rev. D 109, 104004 (2024)
General Relativity (GR) and Unimodular Gravity (UG) provide two equivalent descriptions of gravity that differ in the nature of the cosmological constant. While GR is based on the group of diffeomorphisms that permits the cosmological constant in the
Externí odkaz:
http://arxiv.org/abs/2309.06903
A comparison between three chatbots which are based on large language models, namely ChatGPT-3.5, ChatGPT-4 and Google Bard is presented, focusing on their ability to give correct answers to mathematics and logic problems. In particular, we check the
Externí odkaz:
http://arxiv.org/abs/2305.18618
The Standard Model of the electroweak and strong interactions of particle physics is a quantum field theory. Elementary particles are not indivisible `pieces' of matter but energy bundles of fields, whose properties and interactions are a consequence
Externí odkaz:
http://arxiv.org/abs/2211.14636
Autor:
Sierra, David Alejandro Jimenez, Restrepo, Hernán Darío Benítez, Cardonay, Hernán Darío Vargas, Chanussot, Jocelyn
In this paper we address the problem of change detection in multi-spectral images by proposing a data-driven framework of graph-based data fusion. The main steps of the proposed approach are: (i) The generation of a multi-temporal pixel based graph,
Externí odkaz:
http://arxiv.org/abs/2004.00786
We consider the initial value problem associated to the neural field equation of Amari type with plasticity \[ u_t(x,t)=-u(x,t)+\int_{\Omega}w(x,y)[1+\gamma g( u(x,t) - u(y,t) )] f(u(y,t))\; dy, \;(x,t) \in \Omega \times (0, \infty), \] where $\Omega
Externí odkaz:
http://arxiv.org/abs/1702.00688
We study heterogeneous distribution of gains in neural fields using techniques of quantum mechanics by exploiting a relationship of our model and the time-independent Schr\"{o}dinger equation. We show that specific relationships between the connectiv
Externí odkaz:
http://arxiv.org/abs/1702.00687