Fig. 2From: A topology-marginal composite likelihood via a generalized phylogenetic pruning algorithmNotation for the two-pass likelihood calculation on a tree. Nodes are denoted with u, v, w, x, and y, and partial likelihood vectors are denoted with \({\textbf{p}}\) and \(\textbf{r}\). The directions of double arrows indicate the flow of information to calculate the likelihood of a tree at a given edgeBack to article page