Browsing Research Papers by Author "Okelo, Bernad N."

Now showing items 1-5 of 5

    • Characterization of inner derivations induced by norm-attainable operators 

      Oyake, M. O.; Okelo, Bernad N.; Ongati, Naftali O. (International Journal of Modern Science and Technology, 2018)
      In the present paper, results on characterization of inner derivations in Banach algebras are discussed.Some techniques are employed for derivations due to Mecheri, Hacene, Bounkhel and Anderson. Let H be an infinite ...

    • Characterization of norm inequalities for elementary operators 

      Okelo, Bernad N.; Okelo, B.O; Ongati, Naftali O. (International Journal of Modern Science and Technology, 2017)
      Studies on the norms of the elementary operators on JB* -algebras Prime C * -algebras, Calkin algebras and standard operator algebras has been considered. In this paper, we characterize norm inequalities for Jordan elementary ...

    • New conditions for contractivity of normaloid operators 

      Okelo, Bernad N.; Mogotu, P.O (Journal of Global Research in Mathematical Archives, 2017-08)
      In this paper we establish new conditions for contractivity of normaloid operators. We employ some results for contractivity due to Furuta, Nakomoto, Arandelovic and Dragomir. A particular generalization is also given.

    • New conditions for counteractivity of normality operators 

      Okelo, Bernad N.; Mogotu, P.O (2017-08)
      An interesting area in operator theory is the study of norm inequalities for Hilbert space operators. Many mathematicians have worked on this subject, for example in [2, 3 and 5]. On the other hand, contractive and ...

    • Norm bounds for contractive normality operators 

      Okelo, Bernad N.; Mogotu, P.O (2017-08)
      In this paper we establish the upper and lower norm estimates of contractive normaloid operators using inner product, Schwarz inequality for non-negative real numbers and some operator inequalities.