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Definition df-fns 5762
Description: Define the function with domain relationship. (Contributed by SF, 9-Feb-2015.)
Assertion
Ref Expression
df-fns Fns
Distinct variable group:   ,

Detailed syntax breakdown of Definition df-fns
StepHypRef Expression
1 cfns 5761 . 2 Fns
2 vf . . . . 5
32cv 1641 . . . 4
4 va . . . . 5
54cv 1641 . . . 4
63, 5wfn 4776 . . 3
76, 2, 4copab 4622 . 2
81, 7wceq 1642 1 Fns
Colors of variables: wff setvar class
This definition is referenced by:  fnsex  5832  brfns  5833
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