Abstract
It is proved that if the function f verifies a reverse integral inequality, then the nonincreasing rearrangement of f verifies the same inequality.
As an application, a short proof of higher integrability results from reverse integral inequalities is given, by reduction to the one dimensional case.
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Franciosi, M., Moscariello, G. Higher integrability results. Manuscripta Math 52, 151–170 (1985). https://doi.org/10.1007/BF01171490
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DOI: https://doi.org/10.1007/BF01171490