La Classification Mathématique par matières 2000
Mathematics subject Classification 2000

Question : CC = 20Kxx
20-XX Group theory and generalizations

• 20Kxx Abelian groups
• 20K01 Finite abelian groups
• 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.
• 20K27 Subgroups
• 20K30 Automorphisms, homomorphisms, endomorphisms, etc.
• 20K35 Extensions
• 20K40 Homological and categorical methods
• 20K45 Topological methods [See also 22A05, 22B05]
• 20K99 None of the above, but in this section

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