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Pure Mathematics for Theoretical Computer Science

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Online: 2995-3162
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Pure Mathematics for Theoretical Computer Science
Full Length Article

Volume 4Issue 2PP: 32-42 • 2024

On the Nature of Solutions of Discrete Time Lyapunov Equations

Mohammed Noori Joudah 1* ,
Emad Farhood Muhi 2
1Technical Engineering Department of Cooling and Air conditioning, Imam Jaafar A-Sadiq University, ThiQar, Iraq
2Department of Accounting Techniques, ThiQar Technical College, Southern Technical University, ThiQar, Iraq
* Corresponding Author.
Received: January 27, 2024 Revised: May 20, 2024 Accepted: August 16, 2024

Abstract

This paper provides a method to solve the discrete time Lyapunov equation. Identified and discussed. If the equation takes the following form:

D (λy+μz) = λDy+ μDz , 𝑦,z∈ y; λ ,μ ∈𝐹 .

If ∃ a constant e∈∞ ∋ ||Dy|| ≤ e ||y||, y ∀Y. and D is bounded, then D is called a linear operator equation. In particular, (Lyapunov and Sylvester operator equations) are very important in differential equations, integral equations and many other branches of mathematics. The study of solutions and of the above equestion We also discussed operator equations and special kinds of operators and studied some elementary operators. These operators are generalizations of operators τ𝐴𝐷:𝐷(𝐻)→𝐷(𝐻) τ𝐴𝐷:𝜏𝐴𝐷(𝑦)=𝐴𝑦−𝑦𝐷, 𝑦∈𝐷(𝐻)

Keywords

Time Lyapunov Equation bounded linear operators Sylvester operator equations complex Hilbert space Banach algebra.

References

[1] Abdou. M, A. On the solution of linear and nonlinear integral equation, Applied Mathematics and Computation Volume 146, Issues 2–3, 31 December 2003, Pages 857-871.

[2] Bhatia R., and Rosenthal, P., "How and why to solve the operator equation Ax – xB = Y", Bull London. Math. Soc, Vol 29, (1997), 1-12.

[3] Bhatia R. and Smer, L, "Positive Linear maps and the Lyapunov equation ", operator theory: Advances and applications Vol. 130, pp. 107 – 120, 2001.

[4] Campbell, S. L., Linear operators for which T*T and TT* commute, pacific. J. Math, 53 (1974), 355-361.

[5] Campbell, S. L., Linear operators for which T*T and TT* commute, proc. Amer. Math. Soc., 34 (1972), 177 – 180.

[6] Camphell, S. L., Linear Operators for which T*T and TT* commute, pacific. J. Math., 61 (1975), 53-57.

[7] Gold stein J. A., "on the operator equation Ax + xB = Q ", proc. Amer. Math. Soc., Vol. 70, pp. 31-34, 1978.

[8] Halmos, P. R., A Hilbert space problem Book, springer Verlag, New York, INC., 1982. REFERENCES 28.

[9] Halmos, P. R., A Hilbert space and Theory of multiplicity, Chelsea publishing company, New York, N. Y., 1957.

[10] Herstein, I. N., Topics in Ring Theory, The University of Chicago press, 1969

[11] Kuffi. E, A., Satar. H, A. ON THE SOLUTION OF MORE GENERAL LYAPUNOV EQUATIONS, Proceeding of 3rd scientific conference of the College of Science, University of Baghdad 24 to 26 March 2009.

[12] Lumer, G and Roseblum, M. "Linear operator equation", Proc. Amer. math. Soc. 10 (1959) 34 – 41.

[13] Molnar, L., A condition for a subspace of 𝛽(𝐻) to be an Ideal, Linear Algehra Appl., 235, (1996), 229 – 234.

[14] Siddiqi, A. H., Functional Analysis with Applications, Tata, McGraw – Hill Publishing Company, 1986.

[15] Stering K. Berberian, Introduction to Hilbert space, chelsea publishing company, New York, N. Y, 1976

[16] Wu. J, Clark. A, Kantaros. Y, Vorobeychik.Y. Neural Lyapunov Control for Discrete-Time Systems, Advances in Neural Information Processing Systems 36 (Neur IPS 2023).

Cite This Article

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Joudah, Mohammed Noori, Muhi, Emad Farhood. "On the Nature of Solutions of Discrete Time Lyapunov Equations." Pure Mathematics for Theoretical Computer Science, vol. Volume 4, no. Issue 2, 2024, pp. 32-42. DOI: https://doi.org/10.54216/PMTCS.040203
Joudah, M., Muhi, E. (2024). On the Nature of Solutions of Discrete Time Lyapunov Equations. Pure Mathematics for Theoretical Computer Science, Volume 4(Issue 2), 32-42. DOI: https://doi.org/10.54216/PMTCS.040203
Joudah, Mohammed Noori, Muhi, Emad Farhood. "On the Nature of Solutions of Discrete Time Lyapunov Equations." Pure Mathematics for Theoretical Computer Science Volume 4, no. Issue 2 (2024): 32-42. DOI: https://doi.org/10.54216/PMTCS.040203
Joudah, M., Muhi, E. (2024) 'On the Nature of Solutions of Discrete Time Lyapunov Equations', Pure Mathematics for Theoretical Computer Science, Volume 4(Issue 2), pp. 32-42. DOI: https://doi.org/10.54216/PMTCS.040203
Joudah M, Muhi E. On the Nature of Solutions of Discrete Time Lyapunov Equations. Pure Mathematics for Theoretical Computer Science. 2024;Volume 4(Issue 2):32-42. DOI: https://doi.org/10.54216/PMTCS.040203
M. Joudah, E. Muhi, "On the Nature of Solutions of Discrete Time Lyapunov Equations," Pure Mathematics for Theoretical Computer Science, vol. Volume 4, no. Issue 2, pp. 32-42, 2024. DOI: https://doi.org/10.54216/PMTCS.040203
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