Search Results       Your search for [subject]Differential expressions -- Normal maximal extensions -- Essential spectrum returned 1 record.           On the existence of the essential spectrum for a class of differential expressions having normal maximal extensions. by Castillo, Maritina T.; Diliman, Quezon City: University of the Philippines, 1999. Subject: Maximal extensions, Normal -- Differential expression -- Essential spectrum; Differential expressions -- Normal maximal extensions -- Essential spectrum.          Add to Book Cart Relevance: 67.62%