Titlebook: Ulam Type Stability; Janusz Brzdęk,Dorian Popa,Themistocles M. Rassias Book 2019 Springer Nature Switzerland AG 2019 Ulam’s type stability

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colony

MAL

encomiast

Symmetry of Birkhoff-James Orthogonality of Bounded Linear Operators,rt spaces. We also present some new results, along with the corresponding proofs, that have not been published before. In the last section we suggest some future directions for research, in particular connected to the notion of Ulam stability.

Spartan

Irrepressible

Book 2019, 2018, Timisoara, Romania). It presents up-to-date insightful perspective and very resent research results on Ulam type stability of various classes of linear and nonlinear operators; in particular on the stability of many functional equations in a single and several variables (also in the lattice

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Cauchy Difference Operator in Some Orlicz Spaces,of functions in .. Moreover, . is compact iff . has a finite dimension..Let (., ⋅, .) be a measurable group with a complete, left-invariant and .-finite measure . such that .(.) = .. If . is a .-function, . and ., then there exists a unique additive ., which is equal to . . a.e.

Subdue

cloture

Survey on Cauchy Functional Equation in Lattice Environments, of the habilitation thesis presented to the Department of Mathematics, University of Debrecen (cf. Agbeko, Studies on some addition-free environments. Habilitation Thesis submitted to the University of Debrecen. .) and the material in Agbeko and Szokol (Extracta Math 33:1–10, 2018).