Everitt, W. N.; Giertz, M. [Read, T. T.; Kauffman, R. M.; Zettl, Anton] On the deficiency indices of powers of formally symmetric differential expressions. With three Addenda by T. T. Read, R. M. Kauffman and Anton Zettl. (English) Zbl 0315.34010 Spectral Theor. differ. Equat., Proc. Symp. Dundee 1974, Lect. Notes Math. 448, 167-181 (1975). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 5 Documents MSC: 34A30 Linear ordinary differential equations and systems 47E05 General theory of ordinary differential operators × Cite Format Result Cite Review PDF