Electronic Journal of Differential Equations, Vol. 2006(2006), No. 79, pp. 1-10. Title: Pseudo almost periodic solutions to some differential equations with infinite delay Author: Toka Diagana (Howard Univ., Washington D.C., USA) Abstract: This paper studies some sufficient conditions for the existence and uniqueness of a pseudo almost periodic mild solution to abstract hyperbolic differential equations with infinite delay. Applications include the existence and uniqueness of a pseudo almost periodic mild solution to the heat equation. Submitted May 29, 2006. Published July 19, 2006. Math Subject Classifications: 34G20, 47A55. Key Words: Sectorial operator; analytic semigroup; infinite delay; hyperbolic semigroup; almost periodic; pseudo almost periodic; heat equation.