We have the following indirect implication of form equivalence classes:
Implication | Reference |
---|---|
149 \(\Rightarrow\) 67 |
The axiom of choice in topology, Brunner, N. 1983d, Notre Dame J. Formal Logic note-26 |
67 \(\Rightarrow\) 144 |
Axioms of multiple choice, Levy, A. 1962, Fund. Math. |
144 \(\Rightarrow\) 125 |
P-Raüme and Auswahlaxiom, Brunner, N. 1984c, Rend. Circ. Mat. Palermo. |
Here are the links and statements of the form equivalence classes referenced above:
Howard-Rubin Number | Statement |
---|---|
149: | \(A(F)\): Every \(T_2\) topological space is a continuous, finite to one image of an \(A1\) space. |
67: | \(MC(\infty,\infty)\) \((MC)\), The Axiom of Multiple Choice: For every set \(M\) of non-empty sets there is a function \(f\) such that \((\forall x\in M)(\emptyset\neq f(x)\subseteq x\) and \(f(x)\) is finite). |
144: | Every set is almost well orderable. |
125: | There does not exist an infinite, compact connected \(p\) space. (A \(p\) space is a \(T_2\) space in which the intersection of any well orderable family of open sets is open.) |
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