paper

Compensated compactness: continuity in optimal weak topologies

arXiv:2007.00564 · doi:10.1016/j.jfa.2022.109596

Abstract

For -homogeneous linear differential operators of constant rank, we study the implication in and in implies in , where is an -quasiaffine function and denotes an appropriate type of weak convergence. Here is a local -type space, either the space of measures, or , or the Hardy space ; are -type spaces, by which we mean Lebesgue or Zygmund spaces. Our conditions for each choice of are sharp. Analogous statements are also given in the case when is not a locally integrable function and it is instead defined as a distribution. In this case, we also prove -bounds for the sequence , for appropriate , and new convergence results in the dual of Hölder spaces when is -free and lies in a suitable negative order Sobolev space . The choice of these Hölder spaces is sharp, as is shown by the construction of explicit counterexamples. Some of these results are new even for distributional Jacobians.

39 pages. New examples added to show optimality of Theorem D

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