Tu, Guizhang Darboux transformations connected with higher order isospectral problems. (English) Zbl 0689.35071 Chin. Sci. Bull. 34, No. 24, 2025-2027 (1989). The background of the present investigation on higher order isospectral problems is the Darboux transformation which is nowadays an effective method in generating solutions of partial differential equations. MSC: 35P99 Spectral theory and eigenvalue problems for partial differential equations 35A22 Transform methods (e.g., integral transforms) applied to PDEs 35C05 Solutions to PDEs in closed form Keywords:isospectral problems; Darboux transformation PDFBibTeX XMLCite \textit{G. Tu}, Chin. Sci. Bull. 34, No. 24, 2025--2027 (1989; Zbl 0689.35071)