Open Access

A Fixed Point Approach to the Stability of a Functional Equation of the Spiral of Theodorus

Fixed Point Theory and Applications20082008:945010

DOI: 10.1155/2008/945010

Received: 2 April 2008

Accepted: 26 June 2008

Published: 8 July 2008


Cădariu and Radu applied the fixed point method to the investigation of Cauchy and Jensen functional equations. In this paper, we adopt the idea of Cădariu and Radu to prove the stability of a functional equation of the spiral of Theodorus,

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Authors’ Affiliations

Mathematics Section, College of Science and Technology, Hong-Ik University
Mathematics Section, Pedagogical Department, National and Capodistrian University of Athens


© S.-M. Jung and J. M. Rassias. 2008

This article is published under license to BioMed Central Ltd. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.