Josip Juraj Strossmayer University of Osijek, Department of Mathematics
Abstract
For a given qinkom with ∣q∣le1, we study the C-numerical range of a Hilbert space operator where C is an operator of the form
[
left( begin{array}{ccc}
qI_n & sqrt{1-|q|^2}I_n \
0_n & 0_n
end{array} right)
oplus 0.
]
Some known results on the q-numerical range are extended to this set
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