Commutativity Of Unbounded Normal Operators
Résumé: In this work, we have studied the commutativity of the product of unbounded normal and self-adjoint operators. For instance, we showed that if S and T are two strongly commuting unbounded normal operators, Then S + T is essentially normal. Moreover, we have investigated the -commutativity for closed linear operators. We have showed that if S and T are two normal operators such that T is bounded and TS ST ̸= 0 where 2 C. Then ST is normal if and only if j j = 1: We have also presented a sufficient conditions to ensure the self-adjointness of the product of two linear operators. For example, it is shown that if S and T are two selfadjoint operators where only T is bounded, S is positive and if one of the operators TS or ST is normal, then both TS and ST are self-adjoint and ST = TS. Some examples accompany our results. 38
Mots-clès:
Nos services universitaires et académiques
Thèses-Algérie vous propose ses divers services d’édition: mise en page, révision, correction, traduction, analyse du plagiat, ainsi que la réalisation des supports graphiques et de présentation (Slideshows).
Obtenez dès à présent et en toute facilité votre devis gratuit et une estimation de la durée de réalisation et bénéficiez d'une qualité de travail irréprochable et d'un temps de livraison imbattable!