Eastham, M. S. P.; Grudniewicz, C. G. M. Asymptotic theory and deficiency indices for fourth and higher order self-adjoint equations: A simplified approach. (English) Zbl 0514.34047 Ordinary and partial differential equations, Proc. 6th Conf. Dundee 1980, Lect. Notes Math. 846, 88-99 (1981). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 1 Document MSC: 34E05 Asymptotic expansions of solutions to ordinary differential equations 34C20 Transformation and reduction of ordinary differential equations and systems, normal forms Keywords:deficiency indices; transformation of differential equations Citations:Zbl 0442.00010; Zbl 0211.112; Zbl 0263.34022; Zbl 0278.34049 PDF BibTeX XML