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Browsing by Subject "hyponormal operator"

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    Item type:Article, Access status: Open Access ,
    On the Möbius invariant principal functions of Pincus
    (Wydawnictwa AGH, 2024) Ghosh, Sagar; Misra, Gadadhar
    In this semi-expository short note, we prove that the only homogeneous pure hyponormal operator $T$ with $\operatorname{rank} (T^*T-TT^*) =1$, modulo unitary equivalence, is the unilateral shift.