Fig. 1
From: Parameter identifiability-based optimal observation remedy for biological networks
Four examples for illustrating the detour-path concept, where observed nodes are colored green and unobserved nodes are colored grey. a A simple detour-path; b Two detour-paths P jk , P nk share the same collider node V k and upstream nodes V i , V o ; c Two detour-paths P jk , P nk share the same collider node V k , upstream nodes V i , V m and edge e jk ; d Two detour-paths P jk , P nk share the same upstream node V i and downstream node V j