Stability of functional equations in several variables
Author(s)
Bibliographic Information
Stability of functional equations in several variables
（Progress in nonlinear differential equations and their applications / editor, Haim Brezis, v. 34）
Birkhäuser, 1998
- : us
- : sz
Available at 20 libraries
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Library, Research Institute for Mathematical Sciences, Kyoto University数研
(alk. paper)HYE||1||198037072
Note
Bibliography: p. [290]-305
Includes index
Description and Table of Contents
- Volume
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: us ISBN 9780817640248
Description
The notion of stability of functional equations of several variables in the sense used here had its origins more than half a century ago when S. Ulam posed the fundamental problem and Donald H. Hyers gave the first significant partial solution in 1941. The subject has been revised and de veloped by an increasing number of mathematicians, particularly during the last two decades. Three survey articles have been written on the subject by D. H. Hyers (1983), D. H. Hyers and Th. M. Rassias (1992), and most recently by G. L. Forti (1995). None of these works included proofs of the results which were discussed. Furthermore, it should be mentioned that wider interest in this subject area has increased substantially over the last years, yet the pre sentation of research has been confined mainly to journal articles. The time seems ripe for a comprehensive introduction to this subject, which is the purpose of the present work. This book is the first to cover the classical results along with current research in the subject. An attempt has been made to present the material in an integrated and self-contained fashion. In addition to the main topic of the stability of certain functional equa tions, some other related problems are discussed, including the stability of the convex functional inequality and the stability of minimum points. A sad note. During the final stages of the manuscript our beloved co author and friend Professor Donald H. Hyers passed away.
Table of Contents
Prologue.- 1. Introduction.- 2. Approximately Additive and Approximately Linear Mappings.- 3. Stability of the Quadratic Functional Equation.- 4. Generalizations. The Method of Invariant Means.- 5. Approximately Multiplicative Mappings. Superstability.- 6. The Stability of Functional Equations for Trigonometric and Similar Functions.- 7. Functions with Bounded nth Differences.- 8. Approximately Convex Functions.- 9. Stability of the Generalized Orthogonality Functional Equation.- 10. Stability and Set-Valued Functions.- 11. Stability of Stationary and Minimum Points.- 12. Functional Congruences.- 13. Quasi-Additive Functions and Related Topics.- References.
- Volume
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: sz ISBN 9783764340247
Description
This volume presents a comprehensive introduction to the subject of stability of functional equations of several variables, featuring classical results alongside late-1990s research.
Table of Contents
- Approximately additive and approximately linear mappings
- stability of the quadratic functional equation
- generalizations - the method of invariant means
- approximately multiplicative mappings - superstability
- stability of functional equations for trigonometric and similar functions
- functions with bounded nth differences
- approximately convex functions
- stability of the generalized orthogonality functional equation
- stability and set-valued mappings
- stability of stationary and minimum points
- functional congruences
- quasi-additive functions and related topics.
by "Nielsen BookData"