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Abstract

In this paper, we discuss the isometries of composition operators on the holomorphic general family function spaces F (p, q, s). First, we classify the isometric composition operators acting on a general Banach spaces. For 1 < p < 2, we display that an isometry of C φ is caused only by a rotation of the disk. We scrutinize the previous work on the case for p ≥ 2. Also, we characterize many of the foregoing results about all α-Besov-type spaces F (p, αp − 2, s), α > 0. We exhibit that in every classes F (p, αp − 2, s) except for the Dirichlet space D = F (2, 0, 0), rotations are the only that produce isometries.f * = |f (0)| + f F (p,q,s) .