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20Kxx - Abelian groups
| 20K01 |
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Finite abelian groups |
| 20K10 |
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Torsion groups, primary groups and generalized primary groups |
| 20K15 |
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Torsion-free groups, finite rank |
| 20K20 |
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Torsion-free groups, infinite rank |
| 20K21 |
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Mixed groups |
| 20K25 |
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Direct sums, direct products, etc. |
| 20K27 |
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Subgroups |
| 20K30 |
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Automorphisms, homomorphisms, endomorphisms, etc. |
| 20K35 |
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Extensions |
| 20K40 |
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Homological and categorical methods |
| 20K45 |
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Topological methods |
| 20K99 |
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Miscellaneous |
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