Sharp $p$-Capacity Estimates via Quermassintegrals in Hyperbolic Space

Abstract: This paper establishes sharp upper bounds for $p$-capacities $\mathrm{Cap}<em>{1&lt;p&lt;\infty}$ in the hyperbolic space $\mathbb{H}<sup>n$ through hyperbolic quermassintegrals and effective curvature radii. The quermassintegral comparisons involve $W</em>{n-1}$, $W_{k+1}+k(n+1-k)<sup>{-1}W_{k-1}$, and the pair $W_1\mid W_2$. For star-shaped, mean-convex or h-convex hypersurfaces, inverse mean curvature flow further produces curvature radii determined by $L<sup>q$-averages of the normalized mean curvature and by moments of its squared hyperbolic excess. These radii convert the resulting estimates into sharp geodesic-ball comparisons for the capacity-to-area ratio. In the range $p&gt;2m+1$, an interpolating radius combines the $2m$-th curvature-excess radius with the $L<sup>\infty$ curvature scale, thereby linking the finite-moment and supremum regimes. Equality in the sharp comparisons characterizes geodesic balls.