摘要
Let E be a finite interval or real axis R and denote by L<sub>p</sub>（E）, 1≤p≤∞, the classical Lebesque space with usual norm. Let r∈N and denote by L<sub>p</sub><sup>r</sup>（R）, 1≤p≤∞, the subspace of functions f in L<sub>p</sub>（R） for which the （r-1）-th derivative exists and is locally absolutely continuous on R and ||f<sup>f</sup>||P（R） is finite. Further
基金
Project supported by the National Natural Science Foundation of China
