Browsing Faculty of Natural and Agricultural Sciences by Subject "Carathéodory functions"
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A pre-order on operators with positive real part and its invariance under linear fractional transformations (Elsevier, 2014)A pre-order and equivalence relation on the class of Hilbert space operators with positive real part are introduced, in correspondence with similar relations for contraction operators defined by Yu.L. Shmul'yan in . It ...