Interpolation and Spectra of Regular LP -Space Operators
Canadian mathematical bulletin, Tome 33 (1990) no. 4, pp. 470-481

Voir la notice de l'article provenant de la source Cambridge University Press

We consider the Banach algebra consisting of linear operators T which are defined on the simple functions and have bounded extensions Tp on LP for all values of p ∊ [1, ∞]. We show that the 'integral' operators in this algebra form a right ideal, and that each Tp associated to an integral T is regular. When the underlying measure is finite or special discrete we show further that every Tp is regular for every T in the algebra. Algebraic techniques together with interpolation results are then used to get relationships between the spectrum and the order spectrum of the associated Tp 's.
DOI : 10.4153/CMB-1990-076-9
Mots-clés : 47A10, 47B55
Saxe, Karen. Interpolation and Spectra of Regular LP -Space Operators. Canadian mathematical bulletin, Tome 33 (1990) no. 4, pp. 470-481. doi: 10.4153/CMB-1990-076-9
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[1] 1. Arendt, W., On The o-spectrum of regular operators and the spectrum of measures, Math. Z. 178, 271– 278(1981). Google Scholar

[2] 2. Arendt, W. and Sourour, A. R., Perturbation of regular operators and the order essential spectrum, Proc. Akad. Von Weten., A 89 (2), 109–122, 1986. Google Scholar

[3] 3. Barnes, B. A., Interpolation of spectrum of bounded operators on Lebesgue spaces, Proc. of the Great Plains Operator Theory Conference, Kansas, 1987; to appear in Rocky Mt. J. Math. Google Scholar

[4] 4. Barnes, B. A., The spectrum of integral operators on Lebesgue spaces, Journal of Operator Theory, 18 (1987) 115–132. Google Scholar

[5] 5. Barnes, B. A., The spectral and Fredholm theory of extensions of bounded linear operators, Proc. Amer. Math. Soc, 105 (1989) 941–949. Google Scholar

[6] 6. Boyd, D. W., The spectrum of a Cesaro operator, Acta. Sci. Math.Szeged., 29 (1968), 31–34. Google Scholar

[7] 7. Bukhvalov, A. V., Application of methods of the order-bounded operators to the theory of operators in If-spaces, Russian Math. Surveys 38:6 (1983), 43–98. Google Scholar

[8] 8. Herrero, D. A. and Saxe, K., Spectral continuity in complex interpolation, Mathematika Balkanica, 3, no.3-4, (1989) 325–336. Google Scholar

[9] 9. Jörgens, K., Linear Integral Operators, Pitman, Boston-London-Melbourne, 1982. Google Scholar

[10] 10. Ransford, T. J., The spectrum of an interpolated operator and analytic multivalued functions, Pacific J. Math., Vol. 121, No. 2 (1986), 445–466. Google Scholar

[11] 11. Schachermeyer, W., Integral operators on LP -spaces, Part I, Indiana Un. Math. J., Vol. 30, No. 1(1981). Google Scholar

[12] 12. Schaefer, H. H., On the o-spectrum of order bounded operators, Math. Z., 154, 79–84 (1977). Google Scholar

[13] 13. Schaefer, H. H., Banach Lattices and Positive Operators, Springer-Verlag, Berlin, 1974. Google Scholar

[14] 14. Vignati, A.T. and Vignati, M., Spectral theory and complex interpolation, J. Funct. Anal. 80 (1988), 383–397. Google Scholar

[15] 15. Weis, L., An extrapolation theorem for the o-spectrum, Aspects of Positivity in Functional Analysis edited by Nagel, R., Schlotterbeck, U., and M.P.H. Wolff, North-Holland, 1986.c Google Scholar

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