Contents of Volume 9, 2001 Numbers 1&2, January & April

Existence of Periodic Solutions for Quasilinear Ordinary Differential Equations with Discontinuities
NICKOLOAS MATZAKOS AND NIKOLOAS S. PAPAGEORGIOU
Pages 1 - 22

Global Stability of Lotka - Volterra Prey-Predator Systems with Spatial Heterogeneity
YASUHIRO TAKEUCHI AND HIDEKI MURANISHI
Pages 23 - 36

Oscillation of a First Order Neutral Equation and a Second Order Non-neutral Equation
KAIYU LIU AND HONGQIANG ZHANG
Pages 37 - 48

On the Definitions of the Nonlinear Limit-Point/Limit-Circle Properties
M. BARTUSEK, Z. DOSLA AND JOHN R. GRAEF
Pages 49 - 62

The Invadability of a Host in Host - Parasitoid Systems
RYUSUKE KON AND YASUHIRO TAKEUCHI
Pages 63 - 82

Positive Solutions for Higher Order Sturm-Liouville Problems, via Vector Field
P. K. PALAMIDES
Pages 83 - 104

A note on Stochastic Minimax Principle
MRINAL K. GHOSH, K. SURESH KUMAR, A. K. NANDAKUMARAN K. S. MALLIKARJUNA RAO
Pages 105