On the superstability of the cosine and sine type functional equations

zbMath1355.39035MaRDI QIDQ501582

Ahmed Roukbi, Fouad Lehlou, Mohammed Moussa, Samir Kabbaj

Publication date: 9 January 2017

Published in: Annales Universitatis Paedagogicae Cracoviensis. Studia Mathematica (Search for Journal in Brave)

zbMATH Keywords

cosine functional equationsine functional equationstablitysuperstablity

Mathematics Subject Classification ID

Stability, separation, extension, and related topics for functional equations (39B82) Functional equations for complex functions (39B32)

Related Items (1)

Superstability of a Van Vleck's type functional equation for the sine

Cites Work

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• Van Vleck's functional equation for the sine
• On two functional equations with involution on groups related to sine and cosine functions
• On the superstability of the Pexider type generalized trigonometric functional equations
• Kannappan's functional equation on semigroups with involution
• On the stability of trigonometric functional equations
• On the stability of the pexiderized trigonometric functional equation
• The Stability of the Cosine Equation
• The Stability of the Equation f(x + y) = f(x)f(y)

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