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Definition df-symdif 3216
Description: Define the symmetric difference of two classes. Definition IX.9.10, [Rosser] p. 238. (Contributed by SF, 10-Jan-2015.)
Assertion
Ref Expression
df-symdif

Detailed syntax breakdown of Definition df-symdif
StepHypRef Expression
1 cA . . 3
2 cB . . 3
31, 2csymdif 3209 . 2
41, 2cdif 3206 . . 3
52, 1cdif 3206 . . 3
64, 5cun 3207 . 2
73, 6wceq 1642 1
Colors of variables: wff setvar class
This definition is referenced by:  elsymdif  3223  nfsymdif  3233  symdifeq1  3248  symdifeq2  3249  symdifcom  3542  symdifexg  4103
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