On homeomorphic and diffeomorphic solutions of the Abel equation on the plane
Tom 58 / 1993
Annales Polonici Mathematici 58 (1993), 7-18
DOI: 10.4064/ap-58-1-7-18
Streszczenie
We consider the Abel equation φ[f(x)] = φ(x) + a on the plane ℝ², where f is a free mapping (i.e. f is an orientation preserving homeomorphism of the plane onto itself with no fixed points). We find all its homeomorphic and diffeomorphic solutions φ having positive Jacobian. Moreover, we give some conditions which are equivalent to f being conjugate to a translation.
