Holomorphically conjugate polynomial automorphisms of C2 are polynomially conjugate
Abstract
We confirm a conjecture of Friedland and Milnor: if two polynomial automorphisms f and g in Aut(C2) with dynamical degree >1 are conjugate by some holomorphic diffeomorphism φ of C2, then φ is a polynomial automorphism; thus, f and g are conjugate inside Aut(C2). We also discuss a number of variations on this result.
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