Implications

This non-implication, Form 338 \( \not \Rightarrow \) Form 300, whose code is 4, 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: 10268, whose string of implications is:
    31 \(\Rightarrow\) 338
  • A proven non-implication whose code is 3. In this case, it's Code 3: 1267, Form 31 \( \not \Rightarrow \) Form 300 whose summary information is:
    Hypothesis Statement
    Form 31 <p>\(UT(\aleph_{0},\aleph_{0},\aleph_{0})\): <strong>The countable union theorem:</strong>  The union of a denumerable set of denumerable sets is denumerable. </p>

    Conclusion Statement
    Form 300 <p> Any continuous surjection between extremally disconnected compact Hausdorff spaces has an irreducible restriction to a closed subset of its domain. </p>

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

The conclusion Form 338 \( \not \Rightarrow \) Form 300 then follows.

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

Name Statement
\(\cal M1\) Cohen's original model Add a denumerable number of generic reals (subsets of \(\omega\)), \(a_1\), \(a_2\), \(\cdots\), along with the set \(b\) containing them

Edit | Back