Siebzehnte internationale Tagung über Funktionalgleichungen in Oberwolfach vom 17.6. Bis 23.6.1979.
Sign-changing solutions for discrete second-order three-point boundary value problems.
Singular bilateral boundary value problems for discrete generalized Lyapunov matrix equations.
Existence and uniqueness conditions for solving singular initial and two-point boundary value problems for discrete generalized Lyapunov matrix equations and explicit expressions of solutions are given.
Singular boundary value problem on infinite time scale.
Singular second-order multipoint dynamic boundary value problems with mixed derivatives.
Sistemas lineales singulares de dos ecuaciones en diferencias finitas de primer orden de coeficientes constantes y de valores iniciales aleatorios. Aplicaciones.
Skolem–Mahler–Lech type theorems and Picard–Vessiot theory
We show that three problems involving linear difference equations with rational function coefficients are essentially equivalent. The first problem is the generalization of the classical Skolem–Mahler–Lech theorem to rational function coefficients. The second problem is whether or not for a given linear difference equation there exists a Picard–Vessiot extension inside the ring of sequences. The third problem is a certain special case of the dynamical Mordell–Lang conjecture. This allows us to deduce...
Small sets and a class of general functions.
Smooth and discrete systems -- algebraic, analytic, and geometrical representations.
Smoothness in disjoint groups of real functions under composition.
Smoothness of solutions of conjugate boundary-value problems on a measure chain.
Sobre algunas medias de funciones asociativas.
Some functional equations involving means of associative functions are investigated.
Sobre la sección diagonal y la región cero de una t-norma.
We prove that two archimedean t-norms with equal diagonal sections and zero-sets must be identical.
Solution and stability of a mixed type additive, quadratic, and cubic functional equation.
Solution and stability of a mixed type cubic and quartic functional equation in quasi-Banach spaces.
Solution complète au problème de Siegel de linéarisation d'une application holomorphe au voisinage d'un point fixe
Solution estimates for semilinear difference-delay equations with continuous time.
Solution générale d'une classe d'équations fonctionnelles cycliques linéaires et non homogènes
Solution générale d'une classe des équations fonctionnelles cycliques linéaires et homogènes
Solution générale d'une équation fonctionelle dans le domaine des fonctions analytiques