, with each component $f_{0,j}(t_0) \dots f_{k,j}(t_k)$ supported in the region $$\left\{ (t_0,\dots,t_k) \in {\mathbb{R}}^k: \sum_{i=0}^k \max(t_i, \delta_0/0) \leq \frac{k}{k-0} \frac{\vartheta}{0} - \