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math.CV2016
Some Characterizations for Composition Operators on the Fock Space
Liangying Jiang, Gabriel T. Prajitura, Ruhan Zhao
We study composition operators on the Fock spaces , problems considered include the essential norm, normality, spectra, cyclicity and membership in t…
math.CV2015★ 1 cited
Weighted BMO and Hankel operators between Bergman spaces
Jordi Pau, Ruhan Zhao, Kehe Zhu
We introduce a family of weighted BMO and VMO spaces for the unit ball and use them to characterize bounded and compact Hankel operators between different Bergman spaces. In partic…
math.CV2014
Essential Normality of automorphic composition operators
Liangying Jiang, Caiheng Ouyang, Ruhan Zhao
We first characterize those composition operators that are essentially normal on the weighted Bergman space for any real , where induced symbols are automorphisms…