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Definition df-compose 5748
Description: Define the composition function. (Contributed by Scott Fenton, 19-Apr-2021.)
Assertion
Ref Expression
df-compose Compose = (x V, y V (x y))
Distinct variable group:   x,y

Detailed syntax breakdown of Definition df-compose
StepHypRef Expression
1 ccompose 5747 . 2 class Compose
2 vx . . 3 setvar x
3 vy . . 3 setvar y
4 cvv 2859 . . 3 class V
52cv 1641 . . . 4 class x
63cv 1641 . . . 4 class y
75, 6ccom 4721 . . 3 class (x y)
82, 3, 4, 4, 7cmpt2 5653 . 2 class (x V, y V (x y))
91, 8wceq 1642 1 wff Compose = (x V, y V (x y))
Colors of variables: wff setvar class
This definition is referenced by:  composevalg  5817  composefn  5818  composeex  5820
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