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

Detalles Bibliográficos
Autor Principal: Castillo, Maritina T.
Formato: Thesis
Idioma:English
Publicado: 1999.
Subjects:
Spectral theory (Mathematics).
Differential operators.