The Beltrami Equation: A Geometric Approach
Vladimir Gutlyanskii
A Geometric Approach Vladimir Gutlyanskii, Vladimir Ryazanov, Uri Srebro, Eduard Yakubov ... By Lemma 10.2, the point (p(s') has a neighborhood Up, where f is a proper folding map, and by Theorem 10.5, there is a continuous function h,/ in ...