Fig. 1
From: GraphKKE: graph Kernel Koopman embedding for human microbiome analysis
An example of a time-evolving graph of microbe interactions with two metastable states: healthy and ill. Red color of vertices means that the concentrations of microbes decreased after a person became ill at time \(t + \tau + 1\). This reduction results in the change of the topology of the time-evolving graph characterized by removing the edges between vertices in red and some vertices in yellow