Electronic Journal of Differential Equations, Vol. 2010(2010), No. 83, pp. 1-7. Title: Existence of weak solutions for mixed problems of parabolic systems Authors: Pham Trieu Duong (Hanoi National Univ., Hanoi, Vietnam) Do Van Loi (Hong Duc Univ., Thanhhoa, Vietnam) Abstract: The purpose of this paper is to investigate the existence of generalized solutions for strongly parabolic systems in a cylindrical domain. The decay of the solution at infinity, depending on the right-hand of the equation, is also studied in this article. Submitted May 20, 2010. Published June 18, 2010. Math Subject Classifications: 35K35. Key Words: Parabolic system; generalized solution; asymptotic behavior; Garding's inequality.