2021 年 53 巻 p. 17-34
In this paper we prove the boundedness of the generalized fractional integral operator Iρ on generalized Campanato spaces with variable growth condition, which is a generalization and improvement of previous results, and then, we establish the boundedness of Iρ on their bi-preduals. We also prove the boundedness of Iρ on their preduals by the duality.