A survey on the numerical index of a Banach space.
A survey on the Weierstrass approximation theorem.
A symbolic calculus and a parametrix construction for pseudodifferential operators with non-smooth negative definite symbols.
A system of generalized mixed equilibrium problems and fixed point problems for pseudocontractive mappings in Hilbert spaces.
A system of nonlinear operator equations for a mixed family of fuzzy and crisp operators in probabilistic normed spaces.
A Szegö type property for two doubly commuting contractions
A tauberian theorem in quantum mechanical inverse scattering theory
A theorem of Borsuk-Ulam type for multifunctions
A theorem of Meir-Keeler type revisited.
A theorem of Nehari type on weighted Bergman spaces of the unit ball.
A theorem of Rolewicz's type for measurable evolution families in Banach spaces.
A Theorem of the Closed Graph Type.
A theorem of the Hahn-Banach type and its applications
Let Y be a subgroup of an abelian group X and let T be a given collection of subsets of a linear space E over the rationals. Moreover, suppose that F is a subadditive set-valued function defined on X with values in T. We establish some conditions under which every additive selection of the restriction of F to Y can be extended to an additive selection of F. We also present some applications of results of this type to the stability of functional equations.
A Theorem On Fixed Points In Locally Convex Spaces
A theorem on "localized" self-adjointness of Schrödinger operators with potentials.
A theorem on many fixed points for nonlinear operator.
A theorem on the common fixed point in locally convex spaces
A theory on perturbations of the Dirac operator.
A third order boundary value problem subject to nonlinear boundary conditions
Utilizing the theory of fixed point index for compact maps, we establish new results on the existence of positive solutions for a certain third order boundary value problem. The boundary conditions that we study are of nonlocal type, involve Stieltjes integrals and are allowed to be nonlinear.
A third order nonlocal boundary value problem at resonance.