We have the following indirect implication of form equivalence classes:
Implication | Reference |
---|---|
384 \(\Rightarrow\) 14 |
"Maximal filters, continuity and choice principles", Herrlich, H. 1997, Quaestiones Math. |
14 \(\Rightarrow\) 141 |
Generalizing Konigs infinity lemma, Cowen, R.H. 1977b, Notre Dame J. Formal Logic |
Here are the links and statements of the form equivalence classes referenced above:
Howard-Rubin Number | Statement |
---|---|
384: | Closed Filter Extendability for \(T_1\) Spaces: Every closed filter in a \(T_1\) topological space can be extended to a maximal closed filter. |
14: | BPI: Every Boolean algebra has a prime ideal. |
141: | [14 P(\(n\))] with \(n = 2\): Let \(\{A(i): i\in I\}\) be a collection of sets such that \(\forall i\in I,\ |A(i)|\le 2\) and suppose \(R\) is a symmetric binary relation on \(\bigcup^{}_{i\in I} A(i)\) such that for all finite \(W\subseteq I\) there is an \(R\) consistent choice function for \(\{A(i): i \in W\}\). Then there is an \(R\) consistent choice function for \(\{A(i): i\in I\}\). |
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