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The study of abstract groups: presentations by generators and relations, free, finite, profinite and pro-p groups, subgroup structure, growth, and structural theorems. Claims stating or applying results about groups belong here; claims about group schemes, algebraic groups, or algebraic-geometry objects do not.
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If a claim here is wrong, or missing evidence, open it: every claim page carries its own entry for challenges, evidence, and corrections. If the graph is missing a claim entirely, propose it below. A proposal is reviewed on its merits; accepted claims are matched against the graph and enter it with their reasoning on record.