Eigenvalues and s-numbers / Albrecht Pietsch. Pietsch, A. (Albrecht) Operator theory. Banach spaces. s-numbers. Eigenvalues. QA329 .P5 1987 515.724 19 PIE Includes index. Bibliography: p. [325]-353. Cambridge [Cambridgeshire] ; New York : Cambridge University Press, 1987. 1987. 1987 Text 360 p. ; eng Cambridge studies in advanced mathematics; 13