The essential norms of composition operators
Glasgow mathematical journal, Tome 34 (1992) no. 2, pp. 143-155

Voir la notice de l'article provenant de la source Cambridge University Press

Throughout the paper n denotes a fixed positive integer unless otherwise specified. Let B = Bn denote the open unit ball of Cn and let S = Sn denote its boundary, the unit sphere. The unique rotation-invariant probability measure on 5 will be denoted by σ = σn. For n = l, we use more customary notations D = B1, T = S1 and dσ1= dθ/2π. The Hardy space on B, denoted by H2(B), is then the space of functions f holomorphic on B for which
Choe, Boo Rim. The essential norms of composition operators. Glasgow mathematical journal, Tome 34 (1992) no. 2, pp. 143-155. doi: 10.1017/S0017089500008661
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