The Classical Beltrami Equation ||µ||∞<1
Consider the Beltrami equation (B) in Sect. 1.1 with ||µ||∞<1, and let f : D → ℂ be its homeomorphic solution. Since |µ| < 1 a.e., f is sense preserving, and since ||µ||∞<1, f is a quasiconformal mapping.
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