Description: Lemma for uses of enp1i . (Contributed by Mario Carneiro, 5-Jan-2016)
Ref | Expression | ||
---|---|---|---|
Hypothesis | enp1ilem.1 | |
|
Assertion | enp1ilem | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | enp1ilem.1 | |
|
2 | uneq1 | |
|
3 | undif1 | |
|
4 | uncom | |
|
5 | 4 1 | eqtr4i | |
6 | 2 3 5 | 3eqtr3g | |
7 | snssi | |
|
8 | ssequn2 | |
|
9 | 7 8 | sylib | |
10 | 9 | eqeq1d | |
11 | 6 10 | imbitrid | |