El-Gebeily, M. A. Weak formulation of singular differential expressions in spaces of functions with minimal derivatives. (English) Zbl 1105.47042 Abstr. Appl. Anal. 2005, No. 7, 691-705 (2005). Self-adjoint extensions for singular symmetric differential operators \[ lu=\frac{1}{w}\sum_{k=0}^n (-1)^k(p_{n-k}u^{(k)})^{(k)} \] are provided in spaces of functions with minimal smooth properties. Reviewer: Vjacheslav Yurko (Saratov) Cited in 2 Documents MSC: 47E05 General theory of ordinary differential operators 34B05 Linear boundary value problems for ordinary differential equations Keywords:ordinary differential operators; selfadjoint extensions PDF BibTeX XML Cite \textit{M. A. El-Gebeily}, Abstr. Appl. Anal. 2005, No. 7, 691--705 (2005; Zbl 1105.47042) Full Text: DOI EuDML