Generalized Hyers-Ulam Stability of Trigonometric Functional Equations
Department of Mathematics, Faculty of Sciences, Ibn Zohr University, Agadir 80000, Morocco
Institute of Mathematics, University of Zurich, CH-8057 Zurich, Switzerland
Moscow Institute of Physics and Technology, 141700 Dolgoprudny, Russia
Author to whom correspondence should be addressed.
Received: 18 April 2018 / Revised: 2 May 2018 / Accepted: 11 May 2018 / Published: 18 May 2018
In the present paper we study the generalized Hyers–Ulam stability of the generalized trigonometric functional equations
is a semigroup,
is a involutive morphism, and
is a multiplicative function such that
As an application, we establish the generalized Hyers–Ulam stability theorem on amenable monoids and when
is an involutive automorphism of S
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Elqorachi, E.; Rassias, M.T. Generalized Hyers-Ulam Stability of Trigonometric Functional Equations. Mathematics 2018, 6, 83.
Elqorachi E, Rassias MT. Generalized Hyers-Ulam Stability of Trigonometric Functional Equations. Mathematics. 2018; 6(5):83.
Elqorachi, Elhoucien; Rassias, Michael T. 2018. "Generalized Hyers-Ulam Stability of Trigonometric Functional Equations." Mathematics 6, no. 5: 83.
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