Hypothesis: HR 273:
There is a subset of \({\Bbb R}\) which is not Borel.
Conclusion: HR 243:
Every principal ideal domain is a unique factorization domain.
List of models where hypothesis is true and the conclusion is false:
| Name | Statement |
|---|---|
| \(\cal N31\) Läuchli's Model IV | The set \(A\) is denumerable |
Code: 3
Comments: