The cosine addition law with an additional term

DOI10.1007/S00010-016-0432-0zbMath1419.39045OpenAlexW2517180695MaRDI QIDQ727952

Henrik Stetkaer

Publication date: 21 December 2016

Published in: Aequationes Mathematicae (Search for Journal in Brave)

Full work available at URL: https://doi.org/10.1007/s00010-016-0432-0

zbMATH Keywords

functional equationButler's problemcosine addition law

Mathematics Subject Classification ID

Functional equations for functions with more general domains and/or ranges (39B52) Functional equations for complex functions (39B32)

Related Items (6)

A generalization of the cosine addition law on semigroups ⋮ The solution of the cosine-sine functional equation on semigroups ⋮ The integral sine addition law ⋮ A functional equation motivated by some trigonometric identities ⋮ The integral cosine addition and sine subtraction laws ⋮ The cosine and sine addition and subtraction formulas on semigroups

Cites Work

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• On a functional equation of trigonometric type
• Exponential type functional equation and its Hyers-Ulam stability
• A generalization of the cosine-sine functional equation on groups
• Sine and cosine equations on hypergroups
• D'Alembert's other functional equation on monoids with an involution
• Functional Equations and Inequalities with Applications
• Functional Equations on Hypergroups
• Functional Equations on Groups
• On a cosine functional equation for operators on the algebra of analytic functions in a domain

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