20XX 


Group theory and generalizations 

20Bxx 

Permutation groups 


20B05 
General theory for finite groups 


20B07 
General theory for infinite groups 


20B10 
Characterization theorems 


20B15 
Primitive groups 


20B20 
Multiply transitive finite groups 


20B22 
Multiply transitive infinite groups 


20B25 
Finite automorphism groups of algebraic, geometric, or combinatorial structures [See also 05Bxx, 12F10, 20G40, 20H30, 51XX] 


20B27 
Infinite automorphism groups [See also 12F10] 


20B30 
Symmetric groups 


20B35 
Subgroups of symmetric groups 


20B40 
Computational methods 


20B99 
None of the above, but in this section 