Fig. 1From: Inferring duplication episodes from unrooted gene treesAn example of scenario T for a gene tree G and a species tree S and two corresponding mappings: ξ:G→T and \(F_{T} \colon G \rightarrow S\) shown for internal nodes of G. Here, T=(((((a,a)+,b-) ∼,(c,d-) ∼) ∼,(ab-,(c-,d) ∼) ∼)+,e) ∼, note that gt(T)=GBack to article page