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

Bibliografiska uppgifter
Huvudupphovsman: Castillo, Maritina T.
Materialtyp: Lärdomsprov
Språk:English
Publicerad: 1999.
Ämnen:
Spectral theory (Mathematics).
Differential operators.