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• Hyers–Ulam–Rassias_stability abstract "The stability problem of functional equations originated from a question of Stanisław Ulam, posed in 1940, concerning the stability of group homomorphisms. In the next year, Donald H. Hyers gave a partial affirmative answer to the question of Ulam in the context of Banach spaces in the case of additive mappings, that was the first significant breakthrough and a step toward more solutions in this area. Since then, a large number of papers have been published in connection with various generalizations of Ulam’s problem and Hyers’s theorem. In 1978, Themistocles M. Rassias succeeded in extending Hyers’s theorem for mappings between Banach spaces by considering an unbounded Cauchy difference subject to a continuity condition upon the mapping. He was the first to prove the stability of the linear mapping. This result of Rassias attracted several mathematicians worldwide who began to be stimulated to investigate the stability problems of functional equations.By regarding a large influence of S. M. Ulam, D. H. Hyers, and Th. M. Rassias on the study of stability problems of functional equations, the stability phenomenon proved by Th. M. Rassias led to the development of what is now known as Hyers–Ulam–Rassias stability of functional equations. In 1950, T. Aoki considered an unbounded Cauchy difference which was generalised later by Rassias to the linear case. This result is known as Hyers–Ulam–Aoki stability of the additive mapping. Aoki (1950) had not considered continuity upon the mapping, whereas Rassias (1978) imposed extra continuity hypothesis which yielded a formally stronger conclusion. For an extensive presentation of the stability of functional equations in the context of Ulam's problem, the interested reader is referred to the recent book of S.-M. Jung, published by Springer, New York, 2011, as well as to the following papers.".
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• Hyers–Ulam–Rassias_stability wikiPageWikiLink Category:Functional_analysis.
• Hyers–Ulam–Rassias_stability wikiPageWikiLink Category:Functional_equations.
• Hyers–Ulam–Rassias_stability wikiPageWikiLink Category:Mathematical_analysis.
• Hyers–Ulam–Rassias_stability wikiPageWikiLink Functional_equation.
• Hyers–Ulam–Rassias_stability wikiPageWikiLink Group_homomorphism.
• Hyers–Ulam–Rassias_stability wikiPageWikiLink Stanislaw_Ulam.
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• Hyers–Ulam–Rassias_stability wikiPageWikiLinkText "Hyers–Ulam–Rassias stability".
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• Hyers–Ulam–Rassias_stability subject Category:Functional_analysis.
• Hyers–Ulam–Rassias_stability subject Category:Functional_equations.
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• Hyers–Ulam–Rassias_stability type Field.
• Hyers–Ulam–Rassias_stability type Function.
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• Hyers–Ulam–Rassias_stability comment "The stability problem of functional equations originated from a question of Stanisław Ulam, posed in 1940, concerning the stability of group homomorphisms. In the next year, Donald H. Hyers gave a partial affirmative answer to the question of Ulam in the context of Banach spaces in the case of additive mappings, that was the first significant breakthrough and a step toward more solutions in this area.".
• Hyers–Ulam–Rassias_stability label "Hyers–Ulam–Rassias stability".
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