| 20-XX |
|
|
Group theory and generalizations |
|
20Kxx |
|
Abelian groups |
|
|
20K01 |
Finite abelian groups {For sumsets, see 11B13, 11P70} |
|
|
20K10 |
Torsion groups, primary groups and generalized primary groups |
|
|
20K15 |
Torsion-free groups, finite rank |
|
|
20K20 |
Torsion-free groups, infinite rank |
|
|
20K21 |
Mixed groups |
|
|
20K25 |
Direct sums, direct products, etc. for abelian groups |
|
|
20K27 |
Subgroups of abelian groups |
|
|
20K30 |
Automorphisms, homomorphisms, endomorphisms, etc. for abelian groups |
|
|
20K35 |
Extensions of abelian groups |
|
|
20K40 |
Homological and categorical methods for abelian groups |
|
|
20K45 |
Topological methods for abelian groups [See also 22A05, 22B05] |
|
|
20K99 |
None of the above, but in this section |
