Periodic solutions of linear systems with asymmetric variable rank matrix in the derivatives

V Yeromenko, A Aliluiko - Вісник Тернопільського національного …, 2020 - elartu.tntu.edu.ua
The effective sufficient conditions for a positive definite symmetrization of a differential
operator based on a system of two linear first order ordinary differential equations with an …

Periodic solutions of linear systems whith asymmetric variable rank matrix in the derivatives

V Yeromenko, A Aliluiko - 2019 - dspace.wunu.edu.ua
The effective sufficient conditions for a positive definite symmetrization of a differential
operator based on a system of two linear first order ordinary differential equations with an …