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bn:01081942n
Noun Named Entity
Categories: Theorems in group theory, Harv and Sfn no-target errors, Theorems in algebra, Properties of groups, Axiom of choice
EN
Nielsen–Schreier theorem  Nielsen-Schreier Theorem  Nielsen-Schreier  Nielsen-Schreier formula  Nielsen–Schreier formula
EN
In group theory, a branch of mathematics, the Nielsen–Schreier theorem states that every subgroup of a free group is itself free. Wikipedia
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EN
In group theory, a branch of mathematics, the Nielsen–Schreier theorem states that every subgroup of a free group is itself free. Wikipedia
Theorem that every subgroup of a free group is itself free Wikidata
IS A
theorem
PART OF
group theory
NAMED AFTER
Otto Schreier
Jakob Nielsen
STUDIED BY
category theory
Wikipedia
EN
Nielsen–Schreier theorem
Wikidata
EN
Nielsen–Schreier theorem
Wikipedia Redirections
EN
Nielsen-Schreier, Nielsen-Schreier formula, Nielsen-Schreier theorem, Nielsen-Schreier Theorem, Nielsen–Schreier formula, Schreier-Nielsen theorem, Schreier index formula

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