Higher integrability for minimizers under weighted generalized Orlicz growth conditions

Abstract: We investigate variational integrals in a weighted framework under generalized Orlicz growth conditions. Assuming that the weight belongs to a Muckenhoupt class and the growth function satisfies appropriate structural conditions, we prove that the gradient of any local quasiminimizer has local higher integrability. This result extends the previous higher integrability result to the weighted setting, encompassing as particular cases the weighted variable exponent and weighted double phase frameworks. In addition, we establish the existence of minimizers for the associated functional.