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Do the $\ell^{\infty}$ and $\ell^1$ norms yield minimal doubling constants amongst all norms on $\mathbb{R}^n$?

Setting: Let $X:=\mathbb{R}^n$ for some positive integer $n$. For each $1\le p\le \infty$ let $d_p$ denote the metric induced by the $\ell^p_n$ norm thereon. Note that, the doubling constant of a ...
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When can a compact metric space be covered by finitely many nearly-disjoint closed and convex sets?

This question is a follow-up of the following negative question. Let $(X,d)$ be a (non-empty) compact metric space. More generally than in the first post, I'll call a set of non-empty subsets $C_1,\...
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