2 problems

Let $\mathrm{HB}_k(n)$ be the maximum length of an unbordered partial word with parameter $n$ over an alphabet of size $k$, and let $\mathrm{HB}_\infty(n)$ denote the corresponding…

A ruler is a set of marks whose pairwise distances include every integer in the required range, and a Wichmann ruler is the ruler construction described in the paper. Wichmann's co…