PageHeader : Funkcialaj Ekvacioj, 5 (1962), 31?69 Title : Stability of Sets and Perturbed System AuthorInfo : By Taro YOSHIZAWA AuthorInfo : (Nihon University) section : 1. Introduction section : 2. Definitions section : 3. Hypotheses an the set $M$ section : 4. Relationships between each stability section : 5. Liapunov function and stability of a set section : 6. Eventual stability and eventual M-boundedness section : 7. Stability of a set in a perturbed system section : 8. Stability in the large of a perturbed system section : 9. Examples section : Bibliography