@article {15207,
	title = {CLOSED OPERATOR INEQUALITIES AND OPEN PROBLEMS},
	journal = {Mathematical Inequalities and Applications},
	volume = {14},
	year = {2011},
	pages = {147-154},
	abstract = {In [3, 4] , we have given some characterizations of some subclasses of complex Hilbertspace normal operators by inequalities. In this note, we shall reformulate these results using aconcept of closed inequalities. Also, we shall give some new characterizations. Some openproblems concerning closed inequalities are posed at the end of this note.},
	author = {Seddik. A}
}
