Now, pick one of those trees and place it so that every edge of the tree aligns with an edge in the complete graph. Then place another copy of the same tree over a different part of the complete graph ...

The Yule tree is a graph with one edge coming in and two edges coming out of each branch-point. The branches represent the time periods between the evolution of new species. If the branch leads to ...

Their model includes the possibility for the phenotype of the new species to change. The Yule tree is a graph with one edge coming in and two edges coming out of each branch-point. The branches ...