Browsing School of Biological, Physical, Mathematics & Actuarial Sciences by Subject "Contractive operators"

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    • 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.