Implications

We have the following indirect implication of form equivalence classes:

60 \(\Rightarrow\) 150
given by the following sequence of implications, with a reference to its direct proof:

Implication Reference
60 \(\Rightarrow\) 85 clear
85 \(\Rightarrow\) 150 clear

Here are the links and statements of the form equivalence classes referenced above:

Howard-Rubin Number Statement
60:

\(C(\infty,WO)\): Every set of non-empty, well orderable sets has a choice function.
Moore, G. [1982], p 125.

85:

\(C(\infty,\aleph_{0})\):  Every family of denumerable sets has  a choice function.  Jech [1973b] p 115 prob 7.13.

150:

\(PC(\infty,\aleph_0,\infty)\): Every infinite set of denumerable sets has an infinite subset with a choice function.

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