Fig. 12
From: Relative timing information and orthology in evolutionary scenarios
The two pairs x and y as well as \(x'\) and \(y'\) are weak quasi-orthologs in \(\mathcal {S}_1=(T,S,\sigma ,\mu ,\tau _{T},\tau _{S})\) and \(\mathcal {S}_2=(T',S',\sigma ',\mu ',\tau _{T'},\tau _{S'})\), respectively, but it holds \(\tau _{T}({{\,\textrm{lca}\,}}_T(x,y)) < \tau _{S}({{\,\textrm{lca}\,}}_S(\sigma (x),\sigma (y))\) and \(\tau _{T'}({{\,\textrm{lca}\,}}_{T'}(x',y')) > \tau _{S'}({{\,\textrm{lca}\,}}_{S'}(\sigma '(x'),\sigma '(y'))\)