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Syntax Definition co 7145
Description: Extend class notation to include the value of an operation 𝐹 (such as +) for two arguments 𝐴 and 𝐵. Note that the syntax is simply three class symbols in a row surrounded by parentheses. Since operation values are the only possible class expressions consisting of three class expressions in a row surrounded by parentheses, the syntax is unambiguous. (For an example of how syntax could become ambiguous if we are not careful, see the comment in cneg 10860.)
Hypotheses
Ref Expression
cA class 𝐴
cB class 𝐵
cF class 𝐹
Assertion
Ref Expression
co class (𝐴𝐹𝐵)

See definition df-ov 7148 for more information.

Colors of variables: wff setvar class
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