Statements (17)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
gptkb:mathematical_concept
|
| gptkbp:concerns |
abelian groups
|
| gptkbp:field |
group theory
|
| gptkbp:hasSolutionIn |
gptkb:ZFC+¬CH
gptkb:ZFC+CH |
| https://www.w3.org/2000/01/rdf-schema#label |
Whitehead problem
|
| gptkbp:namedAfter |
gptkb:J._H._C._Whitehead
|
| gptkbp:relatedTo |
gptkb:set_theory
gptkb:Ext_functor homological algebra free abelian group |
| gptkbp:solvedBy |
gptkb:Saharon_Shelah
|
| gptkbp:status |
independent of ZFC
|
| gptkbp:type |
Is every abelian group A with Ext^1(A,ℤ)=0 a free abelian group?
|
| gptkbp:yearSolved |
1974
|
| gptkbp:bfsParent |
gptkb:J._H._C._Whitehead
|
| gptkbp:bfsLayer |
6
|