For species tree estimation under the MSC model, Eq. (1) simplifies to Eq. (5) for β= ln3,α=1, and f(x)= ln(3−2e −x). Thus \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$D^{\prime }_{uv}[a,b] = D^{*}_{uv} [a,b] =-\ln p(ab.uv).$\end{document}Duv′[a,b]=Duv∗[a,b]=−lnp(ab.uv).