Jergensen Palle E T Operator commutation relations: commputation relations for operators, semigroup and resolvents with application to mathematical physics and representations of lie groups - Dordrecht D Reidel 1984 - xviii, 493p. cm. - Mathemtics and its application . Standard No.: 23950 Source: Textual Subjects--Topical Terms: Partial differential equations Dewey Class. No.: B43, M4