This is a preview. Log in through your library . Abstract The convolution of two φ-convex functions is estimated by means of an inequality of Hadamard type. The sharpness of this inequality is ...

1$, let Ap(Rn) denote the Figà-Talamanca-Herz algebra, consisting of functions of the form \begin{equation*} \sum_{k = 0} ^\infty fk^\ast gk \end{equation*} with $\sum_k\|f_k\|_p\cdot\|gk\|_{p'} < ...