Implications

This non-implication, Form 0 \( \not \Rightarrow \) Form 118, whose code is 6, is constructed around a proven non-implication as follows:

  • An (optional) implication of code 1 or code 2 is given. In this case, it's Code 2: 11396, whose string of implications is:
    381 \(\Rightarrow\) 0
  • A proven non-implication whose code is 5. In this case, it's Code 3: 750, Form 381 \( \not \Rightarrow \) Form 118 whose summary information is:
    Hypothesis Statement
    Form 381 <p> <strong>DUM</strong>:  The disjoint union of metrizable spaces is metrizable. </p>

    Conclusion Statement
    Form 118 <p> Every linearly orderable topological space is normal.  <a href="/books/28">Birkhoff [1967]</a>, p 241. </p>

  • This non-implication was constructed without the use of this last code 2/1 implication

The conclusion Form 0 \( \not \Rightarrow \) Form 118 then follows.

Finally, the
List of models where hypothesis is true and the conclusion is false:

Name Statement
\(\cal N3\) Mostowski's Linearly Ordered Model \(A\) is countably infinite;\(\precsim\) is a dense linear ordering on \(A\) without first or lastelements (\((A,\precsim) \cong (\Bbb Q,\le)\)); \(\cal G\) is the group of allorder automorphisms on \((A,\precsim)\); and \(S\) is the set of all finitesubsets of \(A\)

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