Fig. 2
From: A comparative study of qualitative and quantitative dynamic models of biological regulatory networks
Dynamic analysis of a negative feedback loop. a A negative feedback loop and the corresponding equations and b state transition graphs for Boolean, hybrid, and Hill-type models. The left or right binary digit of the node identifier indicates the state of A or B, respectively. The black-filled node in the hybrid and Hill-type state transition graphs represent threshold-dependent, real-valued fixed points