Home›Axiom of choice›teorema de Nielsen-Schreier🌐EspañolEnglishDeutschEspañolFrançaisPortuguêsTürkçe日本語EntityQ1259814· pop 5· linked from 15 articlesteorema de Nielsen-Schreiertheorem that every subgroup of a free group is itself freeAvailable in 5 languagesFrançaisDeutschPortuguêsHebrewvia Wikidata sitelinks · CC0ConnectionszbMATH OpenEntityInternational Standard Book NumberEntityCategoriesAxiom of choiceProperties of groupsTheorems in algebraTheorems in group theory