Zobrazeno 1 - 10
of 825
pro vyhledávání: '"P. Amster"'
Autor:
Amster, Pablo, Epstein, Julián
May the Gronwall Lemma be regarded as a maximum principle? In this expository paper, an abstract version of the celebrated inequality is described by means of the spectral bound of an operator defined on a Banach lattice. As a consequence, uniqueness
Externí odkaz:
http://arxiv.org/abs/2308.03604
In this paper, we prove the existence of two positive $T$-periodic solutions of an electrostatic actuator modeled by the time-delayed Duffing equation $$\ddot{x}(t)+f_{D}(x(t),\dot{x}(t))+ x(t)=1- \dfrac{e \mathcal{V}^{2}(t,x(t),x_{d}(t),\dot{x}(t),\
Externí odkaz:
http://arxiv.org/abs/2305.00103
Autor:
P. Amster, M. C. Mariani
Publikováno v:
Abstract and Applied Analysis, Vol 2003, Iss 9, Pp 539-545 (2003)
Externí odkaz:
https://doaj.org/article/5898bf4cd78d4d4487384a2ee68cb4e7
Publikováno v:
Abstract and Applied Analysis, Vol 4, Iss 4, Pp 249-253 (1999)
We consider a nonlinear problem for the mean curvature equation in the hyperbolic space with a Dirichlet boundary data g. We find solutions in a Sobolev space under appropriate conditions on g.
Externí odkaz:
https://doaj.org/article/3de1da38dcca4c479048124dcdcd139e
Publikováno v:
Abstract and Applied Analysis, Vol 4, Iss 1, Pp 61-69 (1999)
Externí odkaz:
https://doaj.org/article/1b939085cf824cc58443b431195b24ef
Autor:
Amster, Pablo
In a paper from 1960, Felix Browder established a theorem concerning the continuation of the fixed points of a family of continuous functions $f_t:X\to X$ depending continuously on a parameter $t\in [0,1]$, where $X$ is a convex and compact subset of
Externí odkaz:
http://arxiv.org/abs/2112.12803
Autor:
Amster, Pablo, Bondorevsky, Melanie
An N-dimensional generalization of Nicholson's equation is analyzed. We consider a model including multiple delays, nonlinear coefficients and a nonlinear harvesting term. Inspired by previous results in this subject, we obtain sufficient conditions
Externí odkaz:
http://arxiv.org/abs/2112.05713
Autor:
Amster, Pablo, Epstein, Julián
An abstract formulation of a duality principle established by Krasnoselskii is presented. Under appropriate conditions, it shall be shown that, if the solutions of a nonlinear functional equation can be obtained by finding fixed points of certain ope
Externí odkaz:
http://arxiv.org/abs/2107.03842
Publikováno v:
Abstract and Applied Analysis, Vol 2006 (2006)
We study the existence of solutions an H-system for a revolution surface without boundary for H depending on the radius f. Under suitable conditions we prove that the existence of a solution is equivalent to the solvability of a scalar equation N(a)=
Externí odkaz:
https://doaj.org/article/708af2d02e704798b7833f38be4a840d
Autor:
P. Amster, P. De Nápoli
Publikováno v:
Abstract and Applied Analysis, Vol 2006 (2006)
We study a nonlinear problem of pendulum-type for a p-Laplacian with nonlinear periodic-type boundary conditions. Using an extension of Mawhin's continuation theorem for nonlinear operators, we prove the existence of a solution under a Landesman-Laze
Externí odkaz:
https://doaj.org/article/ab72d2694c3242bdb74a43dd15bec60a