Hourglass Persistence interleaves sequences of graph inclusions and contractions to produce more expressive topological features than standard persistent homology for learning on graphs and higher-order complexes.
We fix one of these vertices to be called the supernode(denoted∗), in the sense that any time we compare a vertexvwith∗to decide which one to kill off, we always kill offv
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Contraction and Hourglass Persistence for Learning on Graphs, Simplices, and Cells
Hourglass Persistence interleaves sequences of graph inclusions and contractions to produce more expressive topological features than standard persistent homology for learning on graphs and higher-order complexes.