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Mirrors > Home > MPE Home > Th. List > df-symdif | Structured version Visualization version Unicode version |
Description: Define the symmetric difference of two classes. (Contributed by Scott Fenton, 31-Mar-2012.) |
Ref | Expression |
---|---|
df-symdif |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | cA | . . 3 | |
2 | cB | . . 3 | |
3 | 1, 2 | csymdif 3843 | . 2 |
4 | 1, 2 | cdif 3571 | . . 3 |
5 | 2, 1 | cdif 3571 | . . 3 |
6 | 4, 5 | cun 3572 | . 2 |
7 | 3, 6 | wceq 1483 | 1 |
Colors of variables: wff setvar class |
This definition is referenced by: symdifcom 3845 symdifeq1 3846 nfsymdif 3848 elsymdif 3849 dfsymdif3 3893 symdif0 4597 symdifv 4598 symdifid 4599 |
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