Nice paper along the work of [Dasgupta](https://papers-gamma.link/paper/155) and [Cohen-Addad et al.](https://arxiv.org/pdf/1704.02147.pdf). A function to quantify the quality of a hierarchical graph clustering / dendrogram is proposed. An interesting application to compress a dendrogram is proposed. Section 8. If the input graph is a complete bipartite graph, then the quality function Q is maximum if the graph is partitioned in the two independent sets.