A simple proof of the spectral continuity of the Sturm-Liouville problem
Volume 38 / 1997
Banach Center Publications 38 (1997), 183-186
DOI: 10.4064/-38-1-183-186
Abstract
The aim of this article is to present a simple proof of the theorem about perturbation of the Sturm-Liouville operator in Liouville normal form.