Implications

We have the following indirect implication of form equivalence classes:

217 \(\Rightarrow\) 216
given by the following sequence of implications, with a reference to its direct proof:

Implication Reference
217 \(\Rightarrow\) 216 clear

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

Howard-Rubin Number Statement
217:

Every infinite partially ordered set has either an infinite chain or an infinite antichain.

216:

Every infinite tree has either an infinite chain or an infinite antichain.

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