Box-counting by H\"older's traveling salesman
2019
We provide a sufficient Dini-type condition for a subset of a complete, quasiconvex metric space to be covered by a Holder curve. This implies in particular that if the upper box-counting dimension of a set in a quasiconvex metric space is less or equal to $d \geq 1$, then for any $\alpha < \frac{1}{d}$ the set can be covered by an $\alpha$-Holder curve. On the other hand, for each $1\leq d <2$ we give an example of a compact set $K$, in the plane, just failing the above Dini-type condition, with lower box-counting dimension equal to zero and upper box-counting dimension equal to $d$ that can not be covered by a countable collection of $\frac{1}{d}$-Holder curves.
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