Zobrazeno 1 - 10
of 231
pro vyhledávání: '"Ureña, A. J."'
We present some rigorous results on the absence of a wide class of invariant measures for dynamical systems possessing attractors. We then consider a generalization of the classical nonholonomic Suslov problem which shows how previous investigations
Externí odkaz:
http://arxiv.org/abs/2404.14156
Autor:
Urena, Antonio J.
The Lambert problem consists in connecting two given points in a given lapse of time under the gravitational influence of a fixed center. While this problem is very classical, we are concerned here with situations where friction forces act alongside
Externí odkaz:
http://arxiv.org/abs/2302.06334
Autor:
Albouy, Alain, Ureña, Antonio J.
Publikováno v:
Celestial Mechanics and Dynamical Astronomy (2023) 135:18
We consider the Keplerian arcs around a fixed Newtonian center joining two prescribed distinct positions in a prescribed flight time. We prove that, putting aside the "opposition case" where infinitely many planes of motion are possible, there are at
Externí odkaz:
http://arxiv.org/abs/2302.06013
Autor:
Castillo-Díaz, Francisco José, Belmonte-Ureña, Luis J., Diánez-Martínez, Fernando, Camacho-Ferre, Francisco
Publikováno v:
In Ecological Economics October 2024 224
Autor:
Albouy, Alain, Ureña, Antonio J.
Publikováno v:
Communications in Contemporary Mathematics, 25 (2023) no 2250041
Consider the equation of the linear oscillator $u"+u=h(\theta)$, where the forcing term $h:\mathbb R\to\mathbb R$ is $2\pi$-periodic and positive. We show that the existence of a periodic solution implies the existence of a positive solution. To this
Externí odkaz:
http://arxiv.org/abs/2201.09272
We consider autonomous Newtonian systems with Coriolis forces in two and three dimensions and study the existence of branches of periodic orbits emanating from equilibria. We investigate both degenerate and nondegenerate situations. While Lyapunov's
Externí odkaz:
http://arxiv.org/abs/2108.13312
Autor:
Castillo-Díaz, Francisco José, Belmonte-Ureña, Luis J., Molina-Moreno, Valentín, Camacho-Ferre, Francisco
Publikováno v:
In Journal of Cleaner Production 1 May 2024 452
Autor:
Castillo-Díaz, Francisco José, Belmonte-Ureña, Luis J., Abad-Segura, Emilio, Camacho-Ferre, Francisco
Publikováno v:
In Journal of Environmental Management April 2024 357
Autor:
Albouy, Alain, Urena, Antonio J.
Publikováno v:
Eur. Phys. J. Spec. Top. 229 (2020) 1405-1417
We give simple proofs of some simple statements concerning the Lambert problem. We first restate and reprove the known existence and uniqueness results for the Keplerian arc. We also prove in some cases that the elapsed time is a convex function of n
Externí odkaz:
http://arxiv.org/abs/2001.09301
Akademický článek
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