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a new type of hyers-ulam-rassias stability for drygas functional equation
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نویسنده
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sirouni m. ,almahalebi m. ,kabbaj s.
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منبع
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journal of linear and topological algebra - 2018 - دوره : 7 - شماره : 4 - صفحه:251 -260
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چکیده
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In this paper, we prove the generalized hyers-ulam-rassias stability for the drygas functional equation f(x+y)+f(xy)=2f(x)+f(y)+f(y) in banach spaces by using the brzdek's fixed point theorem. moreover, we give a general result on the hyperstability of this equation. our results are improvements and generalizations of the main result of m. piszczek and j. szczawinska
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کلیدواژه
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stability ,hyperstability ,drygas functional equation ,fixed point method ,banach space
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آدرس
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ibn tofail university, faculty, faculty of science, department of mathematics, morocco, ibn tofail university, faculty, faculty of science, department of mathematics, morocco, ibn tofail university, faculty, faculty of science, department of mathematics, morocco
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پست الکترونیکی
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samkabbaj@yahoo.fr
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Authors
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