Nielsen–Schreier theorem
In group theory, a branch of mathematics, the Nielsen–Schreier theorem states that every subgroup of a free group is itself free. It is named after Jakob Nielsen and Otto Schreier.
Axiom of choiceFinitely generated groupFree abelian groupFree groupGraph (topology)Jakob Nielsen (mathematician)List of theoremsNielsen-SchreierNielsen-Schreier TheoremNielsen-Schreier formulaNielsen-Schreier theoremNielsen transformationNielsen–Schreier formulaOtto SchreierReinhold BaerRose (topology)Schreier-Nielsen theoremSchreier index formulaSubgroups of cyclic groupsVirtually
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Nielsen–Schreier theorem
In group theory, a branch of mathematics, the Nielsen–Schreier theorem states that every subgroup of a free group is itself free. It is named after Jakob Nielsen and Otto Schreier.
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Der Satz von Nielsen-Schreier ...... nd Überlagerungen von Graphen.
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En théorie des groupes – une b ...... tal d'un revêtement de graphe.
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In group theory, a branch of m ...... kob Nielsen and Otto Schreier.
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O Teorema de Nielsen-Schreier ...... é livre sobre algum conjunto.
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author1-link
Reinhold Baer
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author2-link
Friedrich Wilhelm Levi
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authorlink
Jean-Pierre Serre
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first
Friedrich
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Jean-Pierre
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Reinhold
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last
Baer
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Levi
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Serre
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comment
Der Satz von Nielsen-Schreier ...... zählbar) unendlichem Rang hat.
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En théorie des groupes – une b ...... s-groupes de tout rang (fini).
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In group theory, a branch of m ...... kob Nielsen and Otto Schreier.
@en
O Teorema de Nielsen-Schreier ...... é livre sobre algum conjunto.
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label
Nielsen–Schreier theorem
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Satz von Nielsen-Schreier
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Teorema de Nielsen–Schreier
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Théorème de Nielsen-Schreier
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