Statements (13)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
gptkb:mathematical_concept
|
| gptkbp:appliesTo |
free groups
|
| gptkbp:field |
group theory
|
| https://www.w3.org/2000/01/rdf-schema#label |
Nielsen–Schreier theorem
|
| gptkbp:importantFor |
fundamental result in combinatorial group theory
|
| gptkbp:namedAfter |
gptkb:Otto_Schreier
gptkb:Jakob_Nielsen |
| gptkbp:provenBy |
combinatorial methods
|
| gptkbp:relatedTo |
gptkb:Schreier's_subgroup_lemma
|
| gptkbp:state |
Every subgroup of a free group is free
|
| gptkbp:yearProved |
1927
|
| gptkbp:bfsParent |
gptkb:Otto_Schreier
|
| gptkbp:bfsLayer |
7
|