nonsummable

From non- +‎ summable.

nonsummable (not comparable)

1. (mathematics) That cannot be summed
   • 2015, Alexey Korepanov, “Linear response for intermittent maps with summable and nonsummable decay of correlations”, in arXiv‎:

     We show that despite the absence of a spectral gap for all ${\displaystyle \alpha \in (0,1)}$ and despite nonsummable correlations for ${\displaystyle \alpha \geq 1/2}$, the map ${\displaystyle \alpha \mapsto \int \varphi \,d\nu _{\alpha }}$ is continuously differentiable for ${\displaystyle \varphi \in L^{q}}$ for ${\displaystyle q}$ sufficiently large..