Local Invertibility Of Sobolev Functions And Applications
Irene Fonseca, Wilfrid Gangbo
Abstract
Irene Fonseca, Wilfrid Gangbo
Abstract
Abstract In this chapter we show that w1,Nfunctions with positive jacobian are locally invertible, with inverse in W1,1 (see Theorem 6.1). Under suitable growth hypotheses, we are able to improve the regularity of the inverse function to W1s for some s > 1. In addition, we give a necessary condition for Sobolev functions to be invertible.
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Abstract In this chapter we show that w1,Nfunctions with positive jacobian are locally invertible, with inverse in W1,1 (see Theorem 6.1). Under suitable growth hypotheses, we are able to improve the regularity of the inverse function to W1s for some s > 1. In addition, we give a necessary condition for Sobolev functions to be invertible.
Key concepts: Invertible matrix, Sobolev space, Inverse, Jacobian matrix and determinant, Mathematics, Pure mathematics, Inverse function, Function (biology)