Combinatorial species¶ Todo Short blurb about species Todo Proofread / point to the main classes rather than the modules? Introductory material¶ Enumeration of trees using generating functions Species, decomposable combinatorial classes Basic Species¶ Combinatorial Species Empty Species Recursive Species Characteristic Species Cycle Species Partition Species Permutation species Linear-order Species Set Species Subset Species Examples of Combinatorial Species Operations on Species¶ Sum species Product species Composition species Functorial composition species Miscellaneous¶ Species structures Miscellaneous Functions