Skip to main content


  • Research Article
  • Open Access

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

Fixed Point Theory and Applications20082008:945010

  • Received: 2 April 2008
  • Accepted: 26 June 2008
  • Published:


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,


  • Functional Equation
  • Differential Geometry
  • Computational Biology
  • Full Article
  • Publisher Note

Publisher note

To access the full article, please see PDF.

Authors’ Affiliations

Mathematics Section, College of Science and Technology, Hong-Ik University, 339-701 Chochiwon, South Korea
Mathematics Section, Pedagogical Department, National and Capodistrian University of Athens, 4 Agamemnonos Street, Aghia Paraskevi, Attikis, 15342 Athens, Greece


© 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.