Implications

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We have the following indirect implication of form equivalence classes:

406 \(\Rightarrow\) 10 given by the following sequence of implications, with a reference to its direct proof:

Implication	Reference
406 \(\Rightarrow\) 10	The axiom of choice and two particular forms of Tychonoff theorem, Alas, O. T. 1969, Portugal. Math.

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

Howard-Rubin Number	Statement
406:	The product of compact Hausdorf spaces is countably compact. Alas [1994].
10:	\(C(\aleph_{0},< \aleph_{0})\):  Every denumerable family of non-empty finite sets has a choice function.

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