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We give the lower bound for the modulus of the radial derivatives andJacobian of harmonic injective mappings from the unit ball onto convex domainin plane and space. As an application we show co-Lipschitz property of someclasses of qch mappings. We also review related results in planar case usingsome novelty.

The lower bound for the modulus of the derivatives and Jacobian of harmonic injective mappings