We employ a new reverse Carleson type condition and define a new sampling condition to study closed range composition operators on BMOA. We provide necessary and also sufficient conditions for a composition operator to be closed range on BMOA. We show that a composition operator is closed range as an operator from the Bloch space to BMOA if and only if it is bounded below on all Möbius transformations.
机构:
Kanazawa Univ, Inst Human & Social Sci, Fac Teacher Educ, Kanazawa, Ishikawa, JapanKanazawa Univ, Inst Human & Social Sci, Fac Teacher Educ, Kanazawa, Ishikawa, Japan