Norm of the Cesàro operator between some spaces of analytic functions

Abstract

In this paper, we determine the exact norm of the Cesàro operator $\mathcal{C}$ on the Korenblum space $H^\infty_α$ for $0 < α\leq \frac12$ and on the logarithmically weighted space $H^\infty_{α,\log}$ for $0 < α< 1$. Moreover, we compute its norm when acting from $H^\infty_{α,\log}$ to $H^\infty_α$. Finally, we establish lower and upper bounds for the norm of $\mathcal{C}$ on the $α$-Bloch space $\mathcal{B}^α$ for $α> 1$, and from the Hardy space $H^\infty$ to $\mathcal{B}^α$ for $α\geq 1$.