Everitt, W. N.; Giertz, M. Some Dirichlet and separation results for certain differential expressions on finite intervals. (English) Zbl 0265.34077 Conf. Theory ordinary partial diff. Equ., Dundee/Scotland 1972, Lect. Notes Math. 280, 264-267 (1972). MSC: 34G99 47E05 PDFBibTeX XML
Everitt, W. N. On a lower bound of a second-order linear differential operator with an integrable-p coefficient. (English) Zbl 0263.34020 Conf. Theory ordinary partial diff. Equ., Dundee/Scotland 1972, Lect. Notes Math. 280, 258-263 (1972). MSC: 34L99 47B25 PDFBibTeX XML