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Syntax Definition wtr 4578
Description: Extend wff notation to include transitive classes. Notation from [TakeutiZaring] p. 35.
Hypothesis
Ref Expression
cA class 𝐴
Assertion
Ref Expression
wtr wff Tr 𝐴

See definition df-tr 4579 for more information.

Colors of variables: wff setvar class
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