Hypothesis: HR 90:
\(LW\): Every linearly ordered set can be well ordered. Jech [1973b], p 133.
Conclusion: HR 89:
Antichain Principle: Every partially ordered set has a maximal antichain. Jech [1973b], p 133.
List of models where hypothesis is true and the conclusion is false:
| Name | Statement |
|---|---|
| \(\cal N4\) The Mathias/Pincus Model I | \(A\) is countably infinite;\(\precsim\) is a universal homogeneous partial ordering on \(A\) (See<a href="/articles/Jech-1973b">Jech [1973b]</a> p 101 for definitions.); \(\cal G\) is the group ofall order automorphisms on \((A,\precsim)\); and \(S\) is the set of allfinite subsets of \(A\) |
Code: 5
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