Implications

We have the following indirect implication of form equivalence classes:

70 \(\Rightarrow\) 70
given by the following sequence of implications, with a reference to its direct proof:

Implication Reference
70 \(\Rightarrow\) 70 The Axiom of Choice, Jech, 1973b, page 82 problem 5.24

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

Howard-Rubin Number Statement
70:

There is a non-trivial ultrafilter on \(\omega\). Jech [1973b], prob 5.24.

70:

There is a non-trivial ultrafilter on \(\omega\). Jech [1973b], prob 5.24.

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