On the existence of the essential spectrum for a class of differential expressions having normal maximal extensions

On the existence of the essential spectrum for a class of differential expressions having normal maximal extensions

Detalhes bibliográficos
Autor principal: Castillo, Maritina T.
Formato: Tese
Idioma:English
Publicado em: 1999.
Assuntos:
Spectral theory (Mathematics).
Differential operators.