Description: Separation Scheme (Aussonderung) using class notation. (Contributed by NM, 27-Apr-1994)
Ref | Expression | ||
---|---|---|---|
Hypothesis | inex2.1 | |
|
Assertion | inex2 | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | inex2.1 | |
|
2 | incom | |
|
3 | 1 | inex1 | |
4 | 2 3 | eqeltri | |