Fig. 2

Temporal hypergraphs. Top row: different timestamps of the sequence \(\{\mu _t\}\); triangles are a discretization of \([0,1]^2\). Bottom row: hypergraphs extracted for \(\mu _t\) at the time steps displayed on the top row; triangles are highlighted in red. In both rows, filled and empty circles correspond to the support of \(f^+\) and \(f^-\), i.e. sources and sinks, respectively. This sequence is obtained for \(\beta = 1.5\)