Everitt, W. N.; Giertz, M. On limit-point and separation criteria for linear differential expressions. (English) Zbl 0329.34020 Proc. Equadiff III, 3rd Czech. Conf. Differ. Equat. Appl., Brno 1972, 31-42 (1973). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page MSC: 34B20 Weyl theory and its generalizations for ordinary differential equations 34A30 Linear ordinary differential equations and systems 35P05 General topics in linear spectral theory for PDEs 47E05 General theory of ordinary differential operators PDFBibTeX XML Full Text: EuDML