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Analytic formulas for the hyperbolic distance between two contractions

Tom 66 / 1997

Ion Suciu Annales Polonici Mathematici 66 (1997), 239-252 DOI: 10.4064/ap-66-1-239-252

Streszczenie

In this paper we give some analytic formulas for the hyperbolic (Harnack) distance between two contractions which permit concrete computations in several situations, including the finite-dimensional case. The main consequence of these formulas is the proof of the Schwarz-Pick Lemma. It modifies those given in [13] by the avoidance of a general Schur type formula for contractive analytic functions, more exactly by reducing the case to the more manageable situation when the function takes as values strict contractions.

Autorzy

  • Ion Suciu

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