Fig. 7
From: Path homologies of motifs and temporal network representations
Digraph of MathOverflow activity over a 24-hour period during 13-14 Oct 2009. User IDs serve as vertex labels, and arcs are directed from answerer to questioner (any parallel arcs are merged). We highlight arcs participating in a 2-homology representative. For completeness, the participating (arc, question) pairs are ((25, 65), 437), ((25, 83), 451), ((65, 83), 446), ((83, 65), 437), ((121, 65), 433), and ((121, 83), 446) as well as ((121, 83), 451). Three of the four users \(\{25,65,83,121\}\) share the same first subject tag (i.e., area of interest/expertise) at time of writing; all four share the same second subject tag