theorem weightedNgmEntry_pos
{N : ℕ} (e : WeightedHierarchicalCESEconomy N) (n : Fin N) (hn : 0 < n.val) :
0 < weightedNgmEntry e n hn := by
unfold weightedNgmEntry
exact ngmEntry_pos e.toHierarchicalCESEconomy n hn## Weighted Hierarchical CES Economy