 and such that each component $f_{0,j}(t_0) \dots f_{k,j}(t_k)$ is 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 (0+{\varepsilon}) \frac{\vartheta}{0} - \frac{\delta_0}{0}