PageHeader : Funkcialaj Ekvacioj, 16 (1973), 97-101 Title : A Necessary and Sufficient Condition for the Title : Existence of a Liapunov Function AuthorInfo : By P. M. SALZBERG and P. SEIBERT AuthorInfo : (Universidad Catolica de Chile) section : Introduction. section : 2. Necessary and sufficient conditions for the existence of a Liapunov function. section : 3. Example. section : 4. Remark concerning the proof of theorem B. section : References