Department of Mathematics, University of the Aegean, Karlovassi 83200, Greece
E. G. Katsoulis ; Department of Mathematics, East Carolina University, Greenville, North Carolina 27858
Abstract:
We give a necessary and sufficient condition on an operator for the existence of an operator in the nest algebra of a continuous nest satisfying (resp. . We also characterise the operators in which have the following property: For every continuous nest there exists an operator in satisfying (resp. .