Contents of Volume 1, Number 1 January 1993

Editorial
V. SREE HARI RAO
Pages 1 - 2

Construction of Hierarchial Matrix Lyapunov function
A.A.MARTYNYUK, V.G.MILADZHANOV AND K.A.BEGMURATOV
Pages 3 - 22

A Maximum Principle and Related Problems for a Laplacian in Hilbert Spaces
A.B.MINGARELLI AND S.WANG
Pages 23 - 34

Periodicity in a Simple Genotype Selection Model
E.A.GROVE, V.L.KOCIC, G.LADAS AND R.LEVINS
Pages 35 - 50

The Scale Transformation Symmetry
B.G.SIDHARTH AND A.L.REDDY
Pages 51 - 58

Differentiability with respect to Boundary Conditions and Deviating Argument for Functional Differential Systems
JEFFREY EHME, PAUL W.ELOE AND JOHNNY HENDERSON
Pages 59 - 72

Extension of the Method of Upper and Lower Solutions for Discontinuous Differential Equations
SEPPO HEIKKILÄ AND V.LAKSHMIKANTHAM
Pages 73 - 86

Stability and Bifurcation in Delay Diffusion Models
WHEI CHING CHAN AND DAVID GREEN, JR.
Pages 87