Description: Version of seex with a disjoint variable condition replaced by a nonfreeness hypothesis (for the sake of illustration). (Contributed by BJ, 27-Apr-2019)
Ref | Expression | ||
---|---|---|---|
Hypothesis | bj-seex.nf | ||
Assertion | bj-seex |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | bj-seex.nf | ||
2 | df-se | ||
3 | 1 | nfeq2 | |
4 | breq2 | ||
5 | 3 4 | rabbid | |
6 | 5 | eleq1d | |
7 | 6 | rspccva | |
8 | 2 7 | sylanb |