subconvex

From sub- +‎ convex.

subconvex (not comparable)

1. (mathematics) Less than or equal to a convex function.
   • 2015, Johan Andersson, Anders Södergren, “On the universality of the Epstein zeta function”, in arXiv‎^[1]:

     As part of the proof we obtain a strong bound of ${\displaystyle E_{n}(L,s)}$ on the critical line that is subconvex for ${\displaystyle n\geq 5}$ and almost all ${\displaystyle n}$-dimensional lattices ${\displaystyle L}$..