Academic Editor: Yuri V. Rogovchenko
Copyright © 2010 Norio Yoshida. 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.
Picone-type inequality is established for a class of half-linear elliptic
equations with forcing term, and oscillation results are derived on the
basis of the Picone-type inequality. Our approach is to reduce the multi-dimensional
oscillation problems to one-dimensional oscillation problems
for ordinary half-linear differential equations.