**5. Conclusions**

We examined the problem of exponential stabilization with any pregiven decay rate for a linear time-varying differential equations with uncertain bounded coefficients by means of stationary linear static feedback. We have received sufficient conditions for the solvability of this problem by state and output feedback. For this purpose, the first Lyapunov method and the Levin theorem on non-oscillatory absolute stability were used. We plan to extend these results to systems of differential equation including systems with delays. A further development of these results may be their extension to systems (64), (65), (66), when *blτ* and (or) *<sup>c</sup>νj* depend on *t*. So far this question remains open.

**Author Contributions:** All authors contributed equally to this manuscript. All authors have read and agreed to the published version of the manuscript.

**Funding:** This research was funded by the Ministry of Science and Higher Education of the Russian Federation in the framework of state assignment No. 075-00232-20-01, project 0827-2020-0010 "Development of the theory and methods of control and stabilization of dynamical systems" and by the Russian Foundation for Basic Research (project 20–01–00293).

**Acknowledgments:** The research was performed using computing resources of the collective use center of IMM UB RAS "Supercomputer center of IMM UB RAS".

**Conflicts of Interest:** The authors declare no conflict of interest.
