On the dichotomy of $p$-walk dimensions on metric measure spaces II

Abstract

On a volume doubling metric measure space endowed with a family of $p$-energies such that the Poincaré inequality and the capacity upper bound with $p$-walk dimension ${\beta }_p$ hold, for $p$ in an open interval $I\subseteq (1,+\infty )$, we prove the following dichotomy: either ${\beta }_p=p$ for all $p\in I$, or the function $p\mapsto \frac{{\beta }_p}{p}$ takes values in $(1,+\infty )$ and is strictly decreasing on $I$. Moreover, if the metric measure space is $d_h$-Ahlfors regular, we prove the following dichotomy: either ${\beta }_p=d_h+p-1$ for all $p\in I$, or the function $p\mapsto \frac{{\beta }_p-d_h}{p-1}$ takes values in $(-\infty ,1)$ and is strictly increasing on $I$.

arXiv comment32 pages, AI statement included