On the deficiency index of even order symmetric differential expressions with essential spectrum

✍ Scribed by Marian P. Roque; Bernd Schultze

• Publisher: John Wiley and Sons
• Year: 2011
• Tongue: English
• Weight: 96 KB
• Volume: 284
• Category: Article
• ISSN: 0025-584X
• DOI: 10.1002/mana.200810141

✦ Synopsis

Abstract

It shall be shown that for every n, \documentclass{article}\usepackage{amssymb}\pagestyle{empty}\begin{document}$k \in \mathbb {N}$\end{document} with n ⩽ k < 2__n__, there exist real symmetric differential expressions M of order 2__n__ with nonempty essential spectrum such that d(M) = k. © 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim