Memory estimation of inverse operators

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We use methods of harmonic analysis and group representation theory to estimate the memory decay of the inverse operators in Banach spaces. The memory of the operators is defined using the notion of the Beurling spectrum. We obtain a general continuous non-commutative version of the celebrated Wiener's Tauberian Lemma with estimates of the "Fourier coefficients" of inverse operators. In particular, we generalize various estimates of the elements of the inverse matrices. The results are illustrated with a variety of examples including integral and integro-differential operators.




Baskakov, A. G., & Krishtal, I. A. (2014). Memory estimation of inverse operators. Journal of Functional Analysis, 267(8), 2551–2605.

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