\contentsline {section}{\numberline {1}Supplementary methods}{1}
\contentsline {subsection}{\numberline {1.1}Polynomial-time exact algorithm}{1}
\contentsline {subsection}{\numberline {1.2}Minimal Description Length}{4}
\contentsline {subsection}{\numberline {1.3}Bayesian-Dirichlet equivalence}{5}
\contentsline {subsection}{\numberline {1.4}Mutual information test}{6}
\contentsline {subsection}{\numberline {1.5}Continuous variables}{7}
\contentsline {subsection}{\numberline {1.6}Network density control}{8}
