Uniqueness and weak stability for multi-dimensional transport equations with one-sided Lipschitz coefficient

Details Uniqueness and weak stability for multi-dimensional transport equations with one-sided Lipschitz coefficient Uniqueness and weak stability for multi-dimensional transport equations with one-sided Lipschitz coefficient

2004-03-23

arxiv.org/abs/math/0403402v1

Annali della Scuola Normale Superiore di Pisa, Cl. Sci. (5) IV (2005) 1-25

Mathematics

Analysis of PDEs

19-03-2004

Scientific paper

The Cauchy problem for a multidimensional linear transport equation with discontinuous coefficient is investigated. Provided the coefficient satisfies a one-sided Lipschitz condition, existence, uniqueness and weak stability of solutions are obtained for either the conservative backward problem or the advective forward problem by duality. Specific uniqueness criteria are introduced for the backward conservation equation since weak solutions are not unique. A main point is the introduction of a generalized flow in the sense of partial differential equations, which is proved to have unique jacobian determinant, even though it is itself nonunique.

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