Mathematics and mechanics

FUNCTION APPROXIMATION WITH THE USE OF THE REMEZ ALGORITHM

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Research article

Korelskaya A. V.

DOI:

https://doi.org/10.23670/IRJ.2023.135.5

Issue: № 9 (135), 2023

Suggested:

24.04.2023

Accepted:

30.08.2023

Published:

18.09.2023

Algebraic Criterion and Robustness of the Stability Margin of a Discrete Dynamic System

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Research article

Besklubnaya A. V.

DOI:

https://doi.org/10.23670/IRJ.2023.131.11

Issue: № 5 (131), 2023

Suggested:

13.02.2023

Accepted:

28.04.2023

Published:

17.05.2023

337

Toward Robust Stability Margin Evaluation in Continuous and Discrete Systems

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Research article

Besklubnaya A. V.

DOI:

https://doi.org/10.23670/IRJ.2023.129.22

Issue: № 3 (129), 2023

Suggested:

08.01.2023

Accepted:

22.02.2023

Published:

17.03.2023

497

ON THE ABSOLUTE CONVERGENCE OF SPECTRAL EXPANSIONS IN A TWO-DIMENSIONAL CLOSED REGION FOR THE LAPLACE OPERATOR WITH A DISCONTINUOUS COEFFICIENT AND THE DIRICHLET PROBLEM

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Research article

Suchkov M. V.

Trifonenkov V. P.

DOI:

https://doi.org/10.23670/IRJ.2023.129.19

Issue: № 3 (129), 2023

Suggested:

05.01.2023

Accepted:

20.02.2023

Published:

17.03.2023

518

PONTRYAGIN’S MAXIMUM PRINCIPLE FOR A MIXED-CONSTRAINED OPTIMAL CONTROL PROBLEM GOVERNED BY THE HEAT EQUATION

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Research article

DOI:

https://doi.org/10.23670/IRJ.2023.128.79

Issue: № 2 (128), 2023

Suggested:

12.01.2023

Accepted:

14.02.2023

Published:

17.02.2023

630

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