Zobrazeno 1 - 10
of 97
pro vyhledávání: '"Figueroa, Rubén"'
Autor:
Faria, Teresa, Figueroa, Rubén
A class of periodic differential $n$-dimensional systems with patch structure with (possibly infinite) delay and nonlinear impulses is considered. These systems incorporate very general nonlinearities and impulses whose signs may vary. Criteria for t
Externí odkaz:
http://arxiv.org/abs/2111.06917
Publikováno v:
In Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology December 2023 136(6):686-690
We introduce a new fixed point theorem of Krasnoselskii type for discontinuous operators. As an application we use it to study the existence of positive solutions of a second-order differential problem with separated boundary conditions and discontin
Externí odkaz:
http://arxiv.org/abs/1703.04510
We introduce a new definition of topological degree for a meaningful class of operators which need not be continuous. Subsequently, we derive a number of fixed point theorems for such operators. As an application, we deduce a new existence result for
Externí odkaz:
http://arxiv.org/abs/1701.02260
Autor:
Figueroa, Rubén, Tojo, F. Adrián F.
We obtain new results on the existence and multiplicity of fixed points of Hammerstein equations in very general cones. In order to achieve this, we combine a new formulation of cones in terms of continuous functionals with fixed point index theory.
Externí odkaz:
http://arxiv.org/abs/1611.02487
Autor:
Figueroa, Rubén, Infante, Gennaro
Publikováno v:
Fixed Point Theory and Applications, (2016), 2016:57
We prove a new fixed point theorem of Schauder-type which applies to discontinuous operators in non-compact domains. In order to do so, we present a modification of a recent Schauder-type theorem due to Pouso. We apply our result to second-order boun
Externí odkaz:
http://arxiv.org/abs/1507.08124
Publikováno v:
In Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology March 2020 129(3):184-191
Autor:
Figueroa, Rubén
The aim of this paper is to show the use of the coupled quasisolutions method as a useful technique when treating with ordinary differential equations with functional arguments of bounded variation. We will do this by looking for solutions for a firs
Externí odkaz:
http://arxiv.org/abs/1305.3266
We deal with some generalizations on a Black--Scholes model arising in financial mathematics. As novelty in this paper, we consider a variable volatility and abstract functional boundary conditions, which allow us to treat a very large class of probl
Externí odkaz:
http://arxiv.org/abs/1304.1690
Autor:
Figueroa, Rubén
We provide a new result on the existence of extremal solutions for second-order Dirichlet problems with deviation argument. As a novelty in this work, the nonlinearity need not be continuous or monotone. In order to obtain this new result, we use a g
Externí odkaz:
http://arxiv.org/abs/1301.4342