We have the following indirect implication of form equivalence classes:

251 \(\Rightarrow\) 251
given by the following sequence of implications, with a reference to its direct proof:

Implication Reference
251 \(\Rightarrow\) 251

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

Howard-Rubin Number Statement
251:

The additive groups \(({\Bbb R},+)\) and \(({\Bbb C},+)\) are  isomorphic.

251:

The additive groups \(({\Bbb R},+)\) and \(({\Bbb C},+)\) are  isomorphic.

Comment:

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