Fig. 6

Summary statistics of antichains and shared successors of those antichains, based on which they were obtained in hep-th citation network. In each case the relative frequency distribution is plotted over all the antichain communities found using successor neighbours, older neighbours who are cited by the newer papers in the antichain community. The statistics used are as follows: the average number of neighbours of each antichain node 〈k〉, the standard deviation of the number of neighbours of each antichain node σ(k), the size of each antichain community \(|\mathcal {A}|\), the density of each bipartite graph \(\langle k\rangle / |\mathcal {N}|\). The final panel shows the age variation of papers in each antichain. That is the standard deviation in the publication date of papers in each community, known in terms of months but we give the plot in terms of years