Advances in Difference Equations 
Volume 2008 (2008), Article ID 143053, 5 pages
doi:10.1155/2008/143053
Research Article

Stability of General Newton Functional Equations for Logarithmic Spirals

Soon-Mo Jung1 and John Michael Rassias2

 1Mathematics Section, College of Science and Technology, Hong-Ik University, 339-701 Chochiwon, South Korea
2Mathematics Section, Pedagogical Department EE, National and Capodistrian University of Athens, 4 Agamemnonos Street, Aghia Paraskevi, Athens, 15342 Attikis, Greece
Received 16 October 2007; Revised 8 January 2008; Accepted 25 January 2008

Recommended by Ulrich Krause

Abstract

We investigate the generalized Hyers-Ulam stability of Newton functional equations for logarithmic spirals.