We have the following indirect implication of form equivalence classes:

59-le \(\Rightarrow\) 0
given by the following sequence of implications, with a reference to its direct proof:

Implication Reference
59-le \(\Rightarrow\) 0

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

Howard-Rubin Number Statement
59-le:

If \((A,\le)\) is a partial ordering that is not a well ordering, then there is no set \(B\) such that \((B,\le)\) (the usual injective cardinal ordering on \(B\)) is isomorphic to \((A,\le)\).
Mathias [1979], p 120.

0:  \(0 = 0\).

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