05XX 


Combinatorics {For finite fields, see 11Txx} 

05Axx 

Enumerative combinatorics {For enumeration in graph theory, see 05C30} 


05A05 
Permutations, words, matrices 


05A10 
Factorials, binomial coefficients, combinatorial functions [See also 11B65, 33Cxx] 


05A15 
Exact enumeration problems, generating functions [See also 33Cxx, 33Dxx] 


05A16 
Asymptotic enumeration 


05A17 
Partitions of integers [See also 11P81, 11P82, 11P83] 


05A18 
Partitions of sets 


05A19 
Combinatorial identities, bijective combinatorics 


05A20 
Combinatorial inequalities 


05A30 
$q$calculus and related topics [See also 33Dxx] 


05A40 
Umbral calculus 


05A99 
None of the above, but in this section 