Clark, Stephen L. A criterion for absolute continuity of the continuous spectrum of a Hamiltonian system. (English) Zbl 0735.34067 J. Math. Anal. Appl. 151, No. 1, 108-128 (1990). Reviewer: R.C.Gilbert (Fullerton) MSC: 34L05 34B20 34L25 PDFBibTeX XMLCite \textit{S. L. Clark}, J. Math. Anal. Appl. 151, No. 1, 108--128 (1990; Zbl 0735.34067) Full Text: DOI
Kopylov, V. I. Connection between the spectral function and the Weyl function of a boundary value problem on the semi-axis. (Russian) Zbl 0828.34070 Funkts. Anal. 31, 79-90 (1990). MSC: 34L05 47A10 PDFBibTeX XMLCite \textit{V. I. Kopylov}, Funkts. Anal. 31, 79--90 (1990; Zbl 0828.34070)
Arora, S. C.; Anand, Sarita; Marwah, Sunita Operators satisfying growth condition. (English) Zbl 0732.47004 Indian J. Pure Appl. Math. 21, No. 12, 1095-1100 (1990). MSC: 47A10 PDFBibTeX XMLCite \textit{S. C. Arora} et al., Indian J. Pure Appl. Math. 21, No. 12, 1095--1100 (1990; Zbl 0732.47004)
Barnes, Bruce A. Essential spectra in a Banach algebra applied to linear operators. (English) Zbl 0728.47001 Proc. R. Ir. Acad., Sect. A 90, No. 1, 73-82 (1990). Reviewer: G.Garske (Hagen) MSC: 47A10 46H05 47A55 47L10 47L20 46H10 PDFBibTeX XMLCite \textit{B. A. Barnes}, Proc. R. Ir. Acad., Sect. A 90, No. 1, 73--82 (1990; Zbl 0728.47001)
Mantlik, Frank; Schneider, Albert Note on the absolutely continuous spectrum of Sturm-Liouville operators. (English) Zbl 0713.34030 Math. Z. 205, No. 3, 491-498 (1990). Reviewer: F.Mantlik MSC: 34B24 PDFBibTeX XMLCite \textit{F. Mantlik} and \textit{A. Schneider}, Math. Z. 205, No. 3, 491--498 (1990; Zbl 0713.34030) Full Text: DOI EuDML