Non-existence of polar factorisations and polar inclusion of a vector-valued mapping

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Uniqueness of the polar factorisation and projection of a vector-valued mapping

G.R. BURTON and R.J. DOUGLAS, Uniqueness of the polar factorisation and projection of a vector-valued mapping. Ann. I.H. Poincare ? A.N. 20 (2003), 405-418.

Steady-state motion of a Mode-III crack on imperfect interfaces

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