We have the following indirect implication of form equivalence classes:

418 \(\Rightarrow\) 418
given by the following sequence of implications, with a reference to its direct proof:

Implication Reference
418 \(\Rightarrow\) 418

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

Howard-Rubin Number Statement
418:

DUM(\(\aleph_0\)): The countable disjoint union of metrizable spaces is metrizable.

418:

DUM(\(\aleph_0\)): The countable disjoint union of metrizable spaces is metrizable.

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