We prove a higher integrability result - similar to Gehring's lemma - for the metric space associated with a family of Lipschitz continuous vector fields by means of sub-unit curves. Applications are given to show the higher integrability of the gradient of minimizers of some noncoercive variational functionals.
@article{bwmeta1.element.bwnjournal-article-smv120i1p1bwm, author = {Bruno Franchi and Francesco Serra Cassano}, title = {Gehring's lemma for metrics and higher integrability of the gradient for minimizers of noncoercive variational functionals}, journal = {Studia Mathematica}, volume = {119}, year = {1996}, pages = {1-22}, zbl = {0865.46017}, language = {en}, url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-smv120i1p1bwm} }
Franchi, Bruno; Serra Cassano, Francesco. Gehring's lemma for metrics and higher integrability of the gradient for minimizers of noncoercive variational functionals. Studia Mathematica, Tome 119 (1996) pp. 1-22. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-smv120i1p1bwm/
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