Butler, G. J.; Erbe, L. H.; Mathsen, R. M. On the non-existence of conjugate points. (English) Zbl 0223.34024 Can. Math. Bull. 13, 31-37 (1970). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page MSC: 34C10 Oscillation theory, zeros, disconjugacy and comparison theory for ordinary differential equations PDFBibTeX XMLCite \textit{G. J. Butler} et al., Can. Math. Bull. 13, 31--37 (1970; Zbl 0223.34024) Full Text: DOI