\BOOKMARK [1][-]{section.1}{Introduction}{}
\BOOKMARK [1][-]{section.2}{Preliminaries}{}
\BOOKMARK [1][-]{section.3}{Chains and Ranks}{}
\BOOKMARK [1][-]{section.4}{Fillings and Degrees}{}
\BOOKMARK [1][-]{section.5}{The M\366bius function}{}
\BOOKMARK [1][-]{section.6}{Dyck paths and permutations}{}