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

Détails bibliographiques
Auteur principal: Castillo, Maritina T.
Format: Thèse
Langue:English
Publié: 1999.
Sujets:
Spectral theory (Mathematics).
Differential operators.