TY - JOUR T1 - On Function Spaces with Mixed Norms — A Survey AU - Huang , Long AU - Yang , Dachun JO - Journal of Mathematical Study VL - 3 SP - 262 EP - 336 PY - 2021 DA - 2021/03 SN - 54 DO - http://doi.org/10.4208/jms.v54n3.21.03 UR - https://global-sci.org/intro/article_detail/jms/18735.html KW - Mixed norm, (weak) Lebesgue space, Morrey space, Hardy space, maximal function, Littlewood–Paley function, Calderón–Zygmund operator. AB -
The targets of this article are threefold. The first one is to give a survey on the recent developments of function spaces with mixed norms, including mixed Lebesgue spaces, iterated weak Lebesgue spaces, weak mixed-norm Lebesgue spaces and mixed Morrey spaces as well as anisotropic mixed-norm Hardy spaces. The second one is to provide a detailed proof for a useful inequality about mixed Lebesgue norms and the Hardy–Littlewood maximal operator and also to improve some known results on the maximal function characterizations of anisotropic mixed-norm Hardy spaces and the boundedness of Calderón–Zygmund operators from these anisotropic mixed-norm Hardy spaces to themselves or to mixed Lebesgue spaces. The last one is to correct some errors and seal some gaps existing in the known articles.