Implications

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We have the following indirect implication of form equivalence classes:

273 \(\Rightarrow\) 273 given by the following sequence of implications, with a reference to its direct proof:

Implication	Reference
273 \(\Rightarrow\) 273

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

Howard-Rubin Number	Statement
273:	There is a subset of \({\Bbb R}\) which is not Borel.
273:	There is a subset of \({\Bbb R}\) which is not Borel.

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