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Definition df-disj 5744
Description: Define the relationship of all disjoint sets. (Contributed by SF, 9-Feb-2015.)
Assertion
Ref Expression
df-disj Disj = {x, y (xy) = }
Distinct variable group:   x,y

Detailed syntax breakdown of Definition df-disj
StepHypRef Expression
1 cdisj 5743 . 2 class Disj
2 vx . . . . . 6 setvar x
32cv 1641 . . . . 5 class x
4 vy . . . . . 6 setvar y
54cv 1641 . . . . 5 class y
63, 5cin 3208 . . . 4 class (xy)
7 c0 3550 . . . 4 class
86, 7wceq 1642 . . 3 wff (xy) =
98, 2, 4copab 4622 . 2 class {x, y (xy) = }
101, 9wceq 1642 1 wff Disj = {x, y (xy) = }
Colors of variables: wff setvar class
This definition is referenced by:  brdisjg  5821  disjex  5823
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