Handbook of Functional Equations

Stability Theory

  • Themistocles M. Rassias

Part of the Springer Optimization and Its Applications book series (SOIA, volume 96)

Table of contents

  1. Front Matter
    Pages i-x
  2. Marcin Adam, Stefan Czerwik, Krzysztof Król
    Pages 1-35
  3. Elhoucien Elqorachi, Youssef Manar, Themistocles M. Rassias
    Pages 135-154
  4. M. E. Gordji, H. Khodaei, Themistocles M. Rassias
    Pages 181-197
  5. Hark-Mahn Kim, Kil-Woung Jun, Eunyoung Son
    Pages 243-254
  6. Jung Rye Lee, Choonkil Park, Themistocles M. Rassias, Dong Yun Shin
    Pages 255-277
  7. Youssef Manar, Elhoucien Elqorachi, Themistocles M. Rassias
    Pages 279-299
  8. D. Zeglami, A. Roukbi, Themistocles M. Rassias
    Pages 367-396

About this book


This  handbook consists of seventeen chapters written by eminent scientists from the international mathematical community, who present important research works in the field of mathematical analysis and related subjects, particularly in the Ulam stability theory of functional equations. The book provides an insight into a large domain of research with emphasis to the discussion of several theories, methods and problems in approximation theory, analytic inequalities, functional analysis, computational algebra and applications.                           The notion of stability of functional equations has its origins with S. M. Ulam, who posed the fundamental problem for approximate homomorphisms in 1940 and with D. H. Hyers, Th. M. Rassias, who provided the first significant solutions for additive and linear mappings in 1941 and 1978, respectively. During the last decade the notion of stability of functional equations has evolved into a very active domain of mathematical research with several applications of interdisciplinary nature.                                                                                         The chapters of this handbook focus mainly on both old and recent developments on the equation of homomorphism for square symmetric groupoids, the linear and polynomial functional equations in a single variable, the Drygas functional equation on amenable semigroups, monomial functional equation,  the Cauchy–Jensen type mappings, differential equations and differential operators, operational equations and inclusions, generalized module left higher derivations, selections of set-valued mappings, D’Alembert’s functional equation, characterizations of information measures,  functional equations in restricted domains, as well as generalized functional stability and fixed point theory.


Cauchy equation Hosszu’s functional equation Jensen’s functional equation Lobachevskii’s functional equation Ulam stability functional equations handbook

Editors and affiliations

  • Themistocles M. Rassias
    • 1
  1. 1.Department of MathematicsNational Technical University of AthensAthensGreece

Bibliographic information