Sv. Zhestkov et Pp. Zabreiko, Non-local theorems on solvability of the Cauchy problem for systems of ordinary differential equations, DAN BELARUS, 43(2), 1999, pp. 13-17
In this article some natural sufficient conditions of solvability of the Ca
uchy problem on the semiaxis for essentially nonlinear nonautonomous system
s of ordinary differential equations are presented. These conditions are ba
sed on differential inequalities theorems for systems of ordinary different
ial equations (usually called Kamke - Picone - Wazewski comparison principl
e).