Description: Relative intersection of an empty family. (Contributed by Stefan O'Rear, 3-Apr-2015)
Ref | Expression | ||
---|---|---|---|
Assertion | riin0 | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | iineq1 | |
|
2 | 1 | ineq2d | |
3 | 0iin | |
|
4 | 3 | ineq2i | |
5 | inv1 | |
|
6 | 4 5 | eqtri | |
7 | 2 6 | eqtrdi | |