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Glossary

Quartet

A quartet, denoted {a,b}{c,d}, represents the relative order of four taxa a, b, c, and d in a phylogeny. Specifically, it means that there exists an edge of the tree whose removal separates the tree into one component containing a and b and another containing c and d.

For example, note that {a,b}{c,d} is the only allowable quartet in the tree below.

Quartet

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