E. D. Zhitelzeif, “Tests for the existence of limit cycles for systems of limit cycles for systems of the form $\dot{x}=y$, $\dot{y}=-\sum_{k=0}^n f_k(x)y^k$”, Differ. Uravn., 1975, Volume 11, Number 9,Pages 1702

Short Communications

Tests for the existence of limit cycles for systems of limit cycles for systems of the form $\dot{x}=y$, $\dot{y}=-\sum_{k=0}^n f_k(x)y^k$

E. D. Zhitelzeif

Popov Higher Naval Academy of Radio Electronics

UDC: 517.925.12

Received: 05.04.1974