On w-hyponormal operators
Volume 156 / 2003
                    
                    
                        Studia Mathematica 156 (2003), 165-175                    
                                        
                        MSC: 47B20, 47A11.                    
                                        
                        DOI: 10.4064/sm156-2-6                    
                                    
                                                Abstract
We study some properties of w-hyponormal operators. In particular we show that some w-hyponormal operators are subscalar. Also we state some theorems on invariant subspaces of w-hyponormal operators.