Almenar, Pedro; Jódar Sánchez, Lucas Antonio(MDPI AG, 2021-11)
[EN] This paper provides a method to bound and calculate any eigenvalues and eigenfunctions of n-th order boundary value problems with sign-regular kernels subject to two-point boundary conditions. The method is based on ...
Almenar-Belenguer, Pedro; Jódar Sánchez, Lucas Antonio(Springer (Biomed Central Ltd.), 2022-07-26)
[EN] This paper provides conditions for determining the sign of all the partial derivatives of
the Green functions of n-th order boundary value problems subject to a wide set of
homogeneous two-point boundary conditions, ...
Almenar, Pedro; Jódar Sánchez, Lucas Antonio(MDPI AG, 2020-05)
[EN] This paper provides results on the sign of the Green function (and its partial derivatives) of ann-th order boundary value problem subject to a wide set of homogeneous two-point boundary conditions. The dependence of ...