2 problems

Let an almost-equidistant diameter set be a set of points in $\mathbb R^d$ of diameter $1$ in which every three points contain a pair at distance $1$. The extremal bound conjecture…

Let $f_{\mathrm{ae}}(d)$ denote the maximum cardinality of an almost-equidistant set in $\mathbb R^d$, meaning a set in which among every three points, some pair is at distance $1$…