Arithmetic Progressions of Length Three in Multiplicative Subgroups of $\mathbb{F}_p$
In this paper, we give an algorithm for detecting non-trivial 3-APs in multiplicative subgroups of $\mathbb{F}_p^\times$ that is substantially more efficient than the naive approach. It follows that certain Var der Waerden-like numbers can be computed in polynomial time.
math.NT↗