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Isometries of the disk
algebra
John McDonald |
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Vol. 58 (1975), No. 1, 143–154
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Abstract |
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In this paper we are concerned with the problem, posed by R. R. Phelps, of describing the into isometries of the disk algebra. We show that, in a certain sense, every isometry can be approximated by convex combinations of isometries of the form f → k(f ∘ ϕ). We also give some sufficient conditions for an isometry to be of the form f → k(f ∘ ϕ). |
Mathematical Subject Classification 2000
Primary: 46J15
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Milestones
Received: 10 February 1972
Revised: 2 February 1974
Published: 1 May 1975
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Authors |
| John McDonald | |
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