Key points are not available for this paper at this time.
Let: Bd, d 1, be a holomorphic function, where Bd denotes the open unit ball of Cᵈ and D= B₁. Let: D D be an inner function and let Kᵖ_ denote the corresponding model space. For p>1, we characterize the compact composition operators C_: Kᵖ_ Hᵖ (Bd), where Hᵖ (Bd) denotes the Hardy space.
Evgueni Doubtsov (Thu,) studied this question.