$$ex sen{fg}_{L^1}leq Csen{f}_{L^{r,al}}sen{g}_{L^{r',al'}}, eex$$ 其中 $$ex fin L^{r,al},quad gin L^{r',al'},quad frac{1}{r}+frac{1}{r'}=1=frac{1}{al}+frac{1}{al'},quad 1<r<infty,quad 1leq alleq infty. eex$$
$$ex sen{fg}_{L^1}leq Csen{f}_{L^{r,al}}sen{g}_{L^{r',al'}}, eex$$ 其中 $$ex fin L^{r,al},quad gin L^{r',al'},quad frac{1}{r}+frac{1}{r'}=1=frac{1}{al}+frac{1}{al'},quad 1<r<infty,quad 1leq alleq infty. eex$$