Statements (18)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
gptkb:mathematical_concept
|
| gptkbp:concerns |
abelian groups
free abelian groups |
| gptkbp:field |
group theory
|
| https://www.w3.org/2000/01/rdf-schema#label |
Whitehead's Problem
|
| gptkbp:namedAfter |
gptkb:J._H._C._Whitehead
|
| gptkbp:publishedIn |
gptkb:Proceedings_of_the_National_Academy_of_Sciences
|
| gptkbp:relatedTo |
gptkb:set_theory
homological algebra |
| gptkbp:sentence |
Is every abelian group A with Ext^1(A,ℤ)=0 a free abelian group?
|
| gptkbp:solutionDependsOn |
gptkb:continuum_hypothesis
axiom of constructibility ZFC independence |
| gptkbp:solutionYear |
1974
|
| gptkbp:solvedBy |
gptkb:Saharon_Shelah
|
| gptkbp:status |
independent of ZFC
|
| gptkbp:bfsParent |
gptkb:ZFC_(Zermelo–Fraenkel_set_theory_with_Choice)
|
| gptkbp:bfsLayer |
8
|