Abstract
We construct an example of a compact operator of the third kind in L p (p ≠ 2) not similar to any integral operator of the first or second kind. This example shows that not every linear equation of the third kind in L p (p ≠ 2) can be reduced by an invertible continuous linear change to an equivalent integral equation of the first or second kind. The example also proves the impossibility of a characterization of integral and Carleman integral operators in L p (p ≠ 2) in terms of the spectrum and its components.
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References
Halmos P. R. and Sunder V. S., Bounded Integral Operators on L 2 Spaces [Russian translation], Nauka, Moscow (1985).
Neumann J., “Charakterisierung des Spectrums eines Integraloperators,” Actualités Sci. Indust., No. 229, 38–55 (1935).
Korotkov V. B., “Classification and characteristic properties of Carleman operators,” Soviet. Math. Dokl., 11, 276–279 (1970).
Korotkov V. B., Integral Operators [in Russian], Nauka, Novosibirsk (1983).
Weidmann J., “Carlemanoperatoren,” Manuscripta Math., 2, No. 1, 1–38 (1970).
Korotkov V. B., An Introduction to the Algebraic Theory of Integral Operators [in Russian], Kolorit, Vladivostok (2000).
Korotkov V. B., “On some properties of partially integral operators,” Dokl. Akad. Nauk SSSR, 217, No. 4, 752–754 (1974).
Korotkov V. B., “Reducing operator families to integral form,” Sibirsk. Mat. Zh., 28, No. 3, 149–151 (1987).
Korotkov V. B., Some Topics in the Theory of Integral Operators [in Russian], Inst. Mat., Novosibirsk (1988).
Weis L., “Integral operators and changes of density,” Indiana Univ. Math. J., 31, No. 1, 83–96 (1982).
Dunford N. and Schwartz J. T., Linear Operators. Vol. 1: General Theory, John Wiley and Sons, New York (1988).
Banach S., Théorie des opérations linéaires, Chelsea Publ. Comp., New York (1955).
Pietsch A., Operator Ideals [Russian translation], Mir, Moscow (1982).
Schachermayer W. and Weis L., “Almost compactness and decomposability of integral operators,” Proc. Amer. Math. Soc., 81, No. 4, 595–599 (1981).
Korotkov V. B., “Regular and compact factorization of integral operators in Lp,” Math. Notes, 32, No. 5, 785–788 (1982).
Maurin K., Methods of Hilbert Space [Russian translation], Mir, Moscow (1965).
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Original Russian Text Copyright © 2014 Korotkov V.B.
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Translated from Sibirskiĭ Matematicheskiĭ Zhurnal, Vol. 55, No. 1, pp. 124–130, January–February, 2014.
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Korotkov, V.B. On the similarity of linear operators in L p to integral operators of the first and second kind. Sib Math J 55, 100–104 (2014). https://doi.org/10.1134/S0037446614010121
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DOI: https://doi.org/10.1134/S0037446614010121