We have the following indirect implication of form equivalence classes:

291 \(\Rightarrow\) 291
given by the following sequence of implications, with a reference to its direct proof:

Implication Reference
291 \(\Rightarrow\) 291

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

Howard-Rubin Number Statement
291:

For all infinite \(x\), \(|x!|=|x^x|\).

291:

For all infinite \(x\), \(|x!|=|x^x|\).

Comment:

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