EXTREMUM PROBLEM IN CONVOLUTIONS WITH
ADDITIONAL CONDITIONS ON THE AXIS

Abstract

The research paper deals with a partially overspecified problem with a Noetherian operator in a complex Hilbert space. On the basis of the performed analysis, it was found that the solution of the extremum problem in convolutions in a complex Hilbert space with an additional condition on the axis is urgent, since no complete solution has been provided so far. In this connection, the necessary and sufficient conditions for the solvability of the posed extremum problem are determined, which are obtained by the factorization method and are formulated in terms of the basis of the kernel of the adjoint operator. As a result, it is illustrated as the example that the Wiener-Hopf equation with the sought and given space functions is solvable at an arbitrarily positive interval. In case of a negative operator index, the determination problem is solvable in quadratures and has a unique solution. As a result of formulation and solution of an extremum problem in convolutions with an additional condition on the axis, within the scope of complex Hilbert spaces, its solution is obtained in solvable in quadratures.

Citation details of the article



Journal: International Journal of Applied Mathematics
Journal ISSN (Print): ISSN 1311-1728
Journal ISSN (Electronic): ISSN 1314-8060
Volume: 33
Issue: 2
Year: 2020

DOI: 10.12732/ijam.v33i2.13

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References

  1. [1] V.M. Alekseev, V.M. Tikhomirov, S.V. Fomin, Optimal Control, Nauka, Moscow (1979).
  2. [2] A. Berlinet, C. Thomas-Agnan, Reproducing Kernel Hilbert Spaces in Probability and Statistics, Kluwer Academic Publishers, Boston/Dordrecht/London (2004).
  3. [3] R. Bielawski, Hyperkhler manifolds of curves in Twistor spaces, SIGMA, 10 (2014), Art. 033.
  4. [4] R. Bielawski, C. Peternell, Differential geometry of Hilbert schemes of curves in a projective space, Complex Manifolds, 6, No 1 (2019), 335-347; doi: 10.1515/coma-2019-0018.
  5. [5] Yu.I. Chersky, Extremum problems for a Noetherian operator, In: Research Methods for Differential and Integral Operators, Naukova Dumka, Kiev (1989), 196-200.
  6. [6] G. Costakis, On a conjecture of D. Herrero concerning hypercyclic operators, Comptes Rendus de l’Academie des Sciences. Ser. I. Mathematique, 330, No 3 (2000), 179-182.
  7. [7] S. Engelberg, Extrema and the method of Lagrange multipliers, In: Random Signals and Noise, CRC Press, Boca Raton (2007), 73-87; doi: 10.1201/b15871-6.
  8. [8] J.D. Fay, Theta Functions on Riemann Surfaces, Lecture Notes in Math., Vol. 352, Springer-Verlag, Berlin/Heidelberg/New York (1973).
  9. [9] F.D. Gakhov, Yu.I. Chersky, Convolution Type Equations, Nauka, Moscow (1978).
  10. [10] Yu.A. Grigoryev, An extremum problem with the Wiener-Hopf operator, Izvestiya Vuzov. Maths., 10 (1989), 68-70.
  11. [11] Yu.A. Grigoryev, Some signs of the solvability of convolution type equations, Differ. Equations, 26 No 1 (1990), 178-179.
  12. [12] S.G. Kreyn, S.Ya. Lvin, Overdetermined and underdetermined equations in Hilbert spaces, Izvestiya Vuzov. Maths., 9 (1987), 59-66.
  13. [13] M.Masujima, Wiener-Hopf method andWiener-Hopf integral equation, In: Applied Mathematical Methods in Theoretical Physics, Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim (2005), 177-247.
  14. [14] A. Peris, Multi-hypercyclic operators are hypercyclic. Mathematische Zeitschrift, 236, No 4 (2001), 779-786.
  15. [15] L. Piela, Lagrange multipliers method, In: Ideas of Quantum Chemistry, Elsevier, Oxford, UK (2014), e121-e125; doi:10.1016/b978-0-444-594365.00034-9.
  16. [16] S. Saitoh, Applications of the reproducing kernel theory to inverse problems, Comm. Korean Math. Soc., 16 (2001), 371-383.
  17. [17] S. Saitoh, Nonlinear transforms and analyticity of functions, In: Nonlinear Mathematical Analysis and Applications, Hadronic Press, Palm Harbor (1998), 223-234.
  18. [18] S. Saitoh, One approach to some general integral transforms and its applications, Integral Transforms and Special Functions, 3 (1995), 49-84.
  19. [19] S. Saitoh, M. Yamada, Inversion formulas for a linear system determined by input and response relations, by using suitable function spaces, Hokkaido University Technical Report Series in Mathematics, 118 (2007), 18-21.
  20. [20] S. Saitoh, M. Yamamoto, Integral transforms involving smooth functions, In: Reproducing Kernels and Their Applications, Springer, Boston, MA (1999), 149-164.
  21. [21] P.A. Santos, B. Silbermann, Galerkin method for Wiener-Hopf operators with piecewise continuous symbol, Integral Equations and Operator Theory, 38 No 1 (2000), 66-80; doi: 10.1007/bf01192302.
  22. [22] E. Trlat, C. Zhang, E. Zuazua, Steady-state and periodic exponential turnpike property for optimal control problems in Hilbert spaces, SIAM Journal on Control and Optimization, 56, No 2 (2018), 1222-1252.
  23. [23] G. Wahba, Spline Models for Observational Data, SIAM, Philadelphia (1990).
  24. [24] Q.-F. Wang, Optimal control for Klein-Gordon-Schrdinger quantum system in complex Hilbert space, In: 2018 37th Chinese Control Conference (CCC), IEEE (2018); doi:10.23919/chicc.2018.8483916.
  25. [25] N. Wilberth, M. Mpimbo, S. Kumar, Somewhere dense orbit that is not dense on a complex Hilbert space, Concrete Operators, 6, No 1 (2019), 58-63; doi: 10.1515/conop-2019-0005.
  26. [26] A. Yamada, Fay’s trisecant formula and Hardy H2 reproducing kernels, In: Reproducing Kernels and their Applications, Springer, Boston, MA (1999), 165-188.
  27. [27] M. Yamada, S. Saitoh, Identification of non-linear systems, J. Computational, Math. Optimization, 4 (2008), 47-60.