Implications

This non-implication, Form 253 \( \not \Rightarrow \) Form 91, whose code is 4, is constructed around a proven non-implication as follows:

  • This non-implication was constructed without the use of this first code 2/1 implication.
  • A proven non-implication whose code is 3. In this case, it's Code 3: 1426, Form 253 \( \not \Rightarrow \) Form 371 whose summary information is:
    Hypothesis Statement
    Form 253 <p> <strong>\L o\'s' Theorem:</strong> If \(M=\langle A,R_j\rangle_{j\in J}\) is a relational system, \(X\) any set and \({\cal F}\) an ultrafilter in \({\cal P}(X)\), then \(M\) and \(M^{X}/{\cal F}\) are elementarily equivalent. </p>

    Conclusion Statement
    Form 371 <p> There is an infinite, compact, Hausdorff, extremally disconnected topological space.  <a href="/excerpts/Morillon-1993-1">Morillon [1993]</a>. </p>

  • An (optional) implication of code 1 or code 2 is given. In this case, it's Code 2: 5977, whose string of implications is:
    91 \(\Rightarrow\) 79 \(\Rightarrow\) 371

The conclusion Form 253 \( \not \Rightarrow \) Form 91 then follows.

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

Name Statement
\(\cal M27\) Pincus/Solovay Model I Let \(\cal M_1\) be a model of \(ZFC + V =L\)

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