Browsing by Subject "Numerical range"

Browsing by Subject "Numerical range"

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  • Certain Properties Involving the Joint Essential Numerical Ranges 
    Cyprian, O. S. (2020)
    The concept of essential numerical range of an operator was dened and studied by Stamp i and Williams in 1972. Researchers generalised this idea of essential numerical range to a group of operators to the joint essential ...
  • Results on the joint essential maximal numerical ranges 
    Cyprian, O. S. (2020-05)
    In the present paper, we show the equivalent denitions of the joint essential maximal numerical range. In the current paper, we show that the properties of the classical numerical range such as compactness also hold for ...
  • Some properties of the joint numerical range of the aluthge transform 
    Cyprian, O. S.; Aywa, S.; Chikamai, L. (2018)
    The study of the Aluthge transform Te was introduced and studied by Aluthge in his study of p-hyponormal operators in 1990. Several researchers have since studied various properties of the transform for a single operator ...

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