cfv - Metamath Proof Explorer

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Syntax Definition cfv 6433

Description: Extend the definition of a class to include the value of a function. Read: "the value of 𝐹 at 𝐴", or "𝐹 of 𝐴".

**Hypotheses**
Ref	Expression
cA	class 𝐴
cF	class 𝐹

**Assertion**
Ref	Expression
cfv	class (𝐹‘𝐴)

See definition df-fv 6441 for more information.

Colors of variables: wff setvar class