Everitt, W. N.; Giertz, M. On some properties of the powers of a formally self-adjoint differential expression. (English) Zbl 0243.34046 Proc. Lond. Math. Soc., III. Ser. 24, 149-170 (1972). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 36 Documents MSC: 34C05 Topological structure of integral curves, singular points, limit cycles of ordinary differential equations 47E05 General theory of ordinary differential operators × Cite Format Result Cite Review PDF Full Text: DOI