Avoiding right angles and certain Hamming distances

Balázs Bursics, Dávid Matolcsi, Péter Pál Pach +1

In this paper we show that the largest possible size of a subset of ${\mathbb{F}}_q^n$ avoiding right angles, that is, distinct vectors $x,y,z$ such that $x-z$ and $y-z$ are perpendi…