def isDisconnected (net : ComplementarityNetwork J) (P : HierarchicalPartition J N) : Prop := ∀ j k : Fin J, P.level j ≠ P.level k → net.w j k = 0
thesis/CESProofs/Hierarchy/EndogenousHierarchy.lean:146
Endogenous Hierarchy: Network CES ↔ Spectral Hierarchy Bridge