Zobrazeno 1 - 10
of 276
pro vyhledávání: '"Alberto Cabada"'
Publikováno v:
Opuscula Mathematica, Vol 44, Iss 2, Pp 167-195 (2024)
This article is devoted to deduce the expression of the Green's function related to a general constant coefficients fractional difference equation coupled to Dirichlet conditions. In this case, due to the points where some of the fractional operators
Externí odkaz:
https://doaj.org/article/79ecd4e1def94eb984343dbd36ad0597
Autor:
Alberto Cabada, Javier Iglesias
Publikováno v:
Boundary Value Problems, Vol 2021, Iss 1, Pp 1-19 (2021)
Abstract This paper is devoted to prove the existence of positive solutions of a second order differential equation with a nonhomogeneous Dirichlet conditions given by a parameter dependence integral. The studied problem is a nonlocal perturbation of
Externí odkaz:
https://doaj.org/article/1bc87e9062534608a997665a8178183c
Autor:
Alberto Cabada, Rochdi Jebari
Publikováno v:
Electronic Journal of Qualitative Theory of Differential Equations, Vol 2020, Iss 70, Pp 1-17 (2020)
In this paper we investigate the existence of positive solutions of fourth-order non autonomous differential equations with integral boundary conditions, the nonlinearity is a continuous function that depends on the spatial variable and its the secon
Externí odkaz:
https://doaj.org/article/3c3cd6cd52cf45fa8f34172e413a7332
Autor:
Alberto Cabada, Nikolay D. Dimitrov
Publikováno v:
Advances in Difference Equations, Vol 2019, Iss 1, Pp 1-16 (2019)
Abstract This paper is concerned with the existence of solutions of an inverse discrete problem with sign-changing nonlinearity. This kind of problems includes, as a particular case, nth order difference equations coupled with suitable conditions on
Externí odkaz:
https://doaj.org/article/b49ed00eb67843a880bedadf2f2ff49e
Publikováno v:
Axioms, Vol 11, Iss 3, p 139 (2022)
In this paper, we were interested in obtaining the exact expression and studying the regions of constant sign of Green’s function related to a second-order perturbed periodic problem coupled with integral boundary conditions at the extremes of the
Externí odkaz:
https://doaj.org/article/7cb1819677ee45bb9fe787649874a080
Publikováno v:
Mathematics, Vol 9, Iss 16, p 1948 (2021)
In this paper, we obtain the explicit expression of the Green’s function related to a general n-th order differential equation coupled to non-local linear boundary conditions. In such boundary conditions, an n dimensional parameter dependence is al
Externí odkaz:
https://doaj.org/article/b8a987a01af0429fb0fe154110835e60
Publikováno v:
Symmetry, Vol 13, Iss 6, p 1101 (2021)
In this article, we present a two-point boundary value problem with separated boundary conditions for a finite nabla fractional difference equation. First, we construct an associated Green’s function as a series of functions with the help of spectr
Externí odkaz:
https://doaj.org/article/b8a72a3b0e024f6784a03e91be450218
Publikováno v:
Electronic Journal of Differential Equations, Vol 2017, Iss 245,, Pp 1-17 (2017)
In this article we analyze some possibilities of finding positive solutions for second-order boundary-value problems with the Dirichlet and periodic boundary conditions, for which the corresponding Green's functions change sign. The obtained resul
Externí odkaz:
https://doaj.org/article/2493c158b29546568e6b35a1f404a409
Autor:
Alberto Cabada, Lorena Saavedra
Publikováno v:
Electronic Journal of Qualitative Theory of Differential Equations, Vol 2017, Iss 59, Pp 1-17 (2017)
The aim of this paper is to ensure the existence of constant sign solutions for the fourth order boundary value problem: \[\begin{cases} u^{(4)}(t)-p\,u''(t)+c(t)\,u(t)=h(t)(\geq 0)\,,&t\in I\equiv[a,b]\,,\\ u(a)=u''(a)=u(b)=u''(b)=0\,, \end{cases}\]
Externí odkaz:
https://doaj.org/article/4a24666599684fd18a1cce95865ee06c
Autor:
Alberto Cabada, Lorena Saavedra
Publikováno v:
Electronic Journal of Differential Equations, Vol 2017, Iss 146,, Pp 1-95 (2017)
This article is devoted to the study of the parameter's set where the Green's function related to a general linear nth-order operator, depending on a real parameter, T_n[M], coupled with many different two point boundary value conditions, is of co
Externí odkaz:
https://doaj.org/article/ff606475d86d4eafadc644534295ac77