Curvature invariant and generalized canonical Operator models - I

Ronald G. Douglas, Yun-Su Kim, Hyun-Kyoung Kwon, Jaydeb Sarkar

Published 2010-09-16, updated 2012-05-25Version 2

One can view contraction operators given by a canonical model of Sz.-Nagy and Foias as being defined by a quotient module where the basic building blocks are Hardy spaces. In this note we generalize this framework to allow the Bergman and weighted Bergman spaces as building blocks, but restricting attention to the case in which the operator obtained is in the Cowen-Douglas class and requiring the multiplicity to be one. We view the classification of such operators in the context of complex geometry and obtain a complete classification up to unitary equivalence of them in terms of their associated vector bundles and their curvatures.