Electronic Journal of Differential Equations,
Vol. 2002(2002), No. 40, pp. 1-17.

Title: A Massera type criterion  for a partial neutral functional
       differential equation
   
Author: Eduardo Hernandez M.  (Inst. de Ciencias Matematicas de Sao Carlos, Brazil)

Abstract: 
 We prove the existence of  periodic  solutions for partial
 neutral functional differential equations with delay, using a
 Massera type criterion.


Submitted March 06, 2002. Published May 7, 2002.
Math Subject Classifications: 35A05, 34G20, 34A09.
Key Words: Functional equations; neutral   equations; 
           semigroup of linear operators.