a1 Chienkuo Junior College of Technology and Commerce, Chang-Hua, Taiwan, Repubic of China
a2 Department of Mathematics, National Central University, Chung-Li, Taiwan, Republic of China
Let φ:ℝ→ℝ be defined by φ(s) = |s|p−2s, with p > 1 a fixed number. We extend Sturm Comparison Theorem of the linear differential equation
to the nonlinear differential equation
by using the Wirtinger inequality. A Lyapunov inequality and some oscillation criteria of (E) are also given.
(Received March 08 1994)
(Revised July 01 1994)