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Schatten Index of the Sectorial Operator via the Real Component of Its Inverse

Author

Listed:
  • Maksim V. Kukushkin

    (National Research University Higher School of Economics, 101000 Moscow, Russia
    Institute of Applied Mathematics and Automation, Kabardino-Balkarian Scientific Center, Russian Academy of Sciences, 360000 Nalchik, Russia)

Abstract

In this paper, we study spectral properties of non-self-adjoint operators with the discrete spectrum. The main challenge is to represent a complete description of belonging to the Schatten class through the properties of the Hermitian real component. The method of estimating the singular values is elaborated by virtue of the established asymptotic formulas. The latter fundamental result is advantageous since, of many theoretical statements based upon it, one of them is a concept on the root vectors series expansion, which leads to a wide spectrum of applications in the theory of evolution equations. In this regard, the evolution equations of fractional order with the sectorial operator in the term not containing the time variable are involved. The concrete well-known operators are considered and the advantage of the represented method is convexly shown.

Suggested Citation

  • Maksim V. Kukushkin, 2024. "Schatten Index of the Sectorial Operator via the Real Component of Its Inverse," Mathematics, MDPI, vol. 12(4), pages 1-21, February.
    • Handle: RePEc:gam:jmathe:v:12:y:2024:i:4:p:540-:d:1336230
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    References listed on IDEAS

    as
    1. Maksim V. Kukushkin, 2020. "On One Method of Studying Spectral Properties of Non-selfadjoint Operators," Abstract and Applied Analysis, Hindawi, vol. 2020, pages 1-13, September.
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