Authors: Bronshtejn I. U., Kopanskij A. Ya.
Abstract
We complete the investigation of the condition $\frak A(k)$ in the case of four-dimensional systems of differential equations. We show by an example that if the dimension is greater than 4, then $\frak A(k)$ is weaker
than the condition $\bold T(k)$ introduced by A.D.Bruno.
Institutul de Matematică Academia de Ştiinţe a Moldovei
str. Academiei 5, Chişinău MD-2028, Moldova