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§ 1.Introduction In [1 ] ,twooperatorclassesofD nearsubnormaloperatorsandnearsubnormaloperatorswereintroduced .TheelementarypropertiesofsuchoperatorswereobtainedbyuseoftheM Pgeneralizedinverse.Moreover,anewnecessaryandsufficientconditionforanoperatortobesubn… 相似文献
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