Fig. 3
From: From pairs of most similar sequences to phylogenetic best matches

Relation of last common ancestors \({{\,\mathrm{lca}\,}}(x,y')\) and \({{\,\mathrm{lca}\,}}(x,y'')\), resp., with quartets on \(\{x,y',y'',z\}\) with a trusted outgroup z
From: From pairs of most similar sequences to phylogenetic best matches

Relation of last common ancestors \({{\,\mathrm{lca}\,}}(x,y')\) and \({{\,\mathrm{lca}\,}}(x,y'')\), resp., with quartets on \(\{x,y',y'',z\}\) with a trusted outgroup z