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Common fixed points of commuting holomorphic maps in the unit ball of
Authors:Filippo Bracci
Affiliation:Dipartimento di Matematica Pura ed Applicata, Università degli Studi di Padova, Via Belzoni 7, 35131 Padova, Italia
Abstract:Let $mathbb B^n$ be the unit ball of $mathbb{C}^n$ ($n>1$). We prove that if $f,g in operatorname{Hol}(mathbb B^n,mathbb B^n)$ are holomorphic self-maps of $mathbb B^n$ such that $f circ g = g circ f$, then $f$ and $g$ have a common fixed point (possibly at the boundary, in the sense of $K$-limits). Furthermore, if $f$ and $g$ have no fixed points in $mathbb B^n$, then they have the same Wolff point, unless the restrictions of $f$ and $g$ to the one-dimensional complex affine subset of $mathbb B^n$ determined by the Wolff points of $f$ and $g$ are commuting hyperbolic automorphisms of that subset.

Keywords:Commuting functions   fixed points   Wolff point
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