The essential spectrum of a class of ordinary differential operators

• 1 September 1964
• journal article
• Published by Mathematical Sciences Publishers in Pacific Journal of Mathematics
• Vol. 14  (3) , 755-776
• https://doi.org/10.2140/pjm.1964.14.755

Abstract

Keywords

• ESSENTIAL SPECTRUM
• DIFFERENTIAL OPERATORS
• ORDINARY DIFFERENTIAL
• CLASS OF ORDINARY