Combinatorics# Introductory material# Combinatorics quickref Introduction to combinatorics in Sage Thematic indexes# Algebraic combinatorics Combinatorial Hopf algebras Cluster algebras and quivers Crystals Root Systems Symmetric Functions FullyCommutativeElements Counting Enumerated sets and combinatorial objects Enumerated sets of partitions, tableaux, … Finite state machines, automata, transducers Combinatorial species Combinatorial designs and incidence structures Posets Combinatorics on words Utilities# Output functions Rankers Combinatorial maps Miscellaneous Related topics# Coding Theory Discrete dynamics Graph Theory