$L^p_μ$-Normed Spaces of Bounded Multilinear Operator

Abstract

We study the spaces of bounded multilinear operators $\mathcal L^i(X,Y)$ endowed with $L^p_μ$-norms, where $X,Y$ are normed spaces and $μ$ is a measure with $p$-moments. These are norms without taking a quotient, under suitable support conditions. The topology induced coincides with the strong operator and compact-open topologies on operator-norm-bounded subsets. Furthermore, we identify the completion of these spaces with spaces of Hilbert--Schmidt operators on the reproducing kernel Hilbert space (RKHS) for $p=2$; with iterated $γ$-radonifying multilinear operators on the RKHS in the Gaussian case, for general $p$.