PageHeader : Funkcialaj Ekvacioj, 21 (1978) 53-62 Title : Negative and Weak Negative Attractors in Title : Semidynamical Systems AuthorInfo : By AuthorInfo : K. M. DAS and S. S. LAKSHMI* AuthorInfo : (Indian Institute of Technology, India) section : 0. Introduction section : 1. section : 2. section : 3. section : 4. section : 5. section : References