Survey on Cauchy functional equation in lattice environments.- A purely fixed point approach to the Ulam-Hyers stability and hyperstability of a general functional equation.- Birkhoff–James orthogonality reversing property and its stability.- Optimal forward contract design for inventory: a value-of-waiting analysis.- Ulam-Hyers stability of functional equations in quasi-b-Banach spaces.- On stability of the functional equation of p-Wright affine functions in 2-Banach spaces.- On solutions and stability of a functional equation arising from a queueing system.- Approximation by cubic mappings.- Solutions and stability of some functional equations on semigroups.- Bi-additive s-functional inequalities and quasi multipliers on Banach-algebras.- On Ulam stability of a generalization of the Fréchet functional equation on a restricted domain.- Miscellanea about the stability of functional equations.- Subdominant eigenvalue location and the robustness of Dividend Policy Irrelevance.- A fixed point theorem in uniformizable spaces.- Symmetry of Birkhoff-James orthogonality of bounded linear operators.- Ulam stability of zero point equations.- Cauchy difference operator in some Orlicz spaces.- Semi-inner products and parapreseminorms on groups and a generalization of a theorem of Maksa and Volkmann on additive functions.- Invariant means in stability theory.- On geometry of Banach function modules - selected topics.- On exact and approximate orthogonalities based on norm derivatives.