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Syntax Definition wbr 4639
Description: Extend wff notation to include the general binary relation predicate. Note that the syntax is simply three class symbols in a row. Since binary relations are the only possible wff expressions consisting of three class expressions in a row, the syntax is unambiguous.
Ref Expression
cA class A
cB class B
cR class R
Ref Expression
wbr wff ARB

See definition df-br 4640 for more information.

Colors of variables: wff setvar class
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