Description: Hypothesis builder for equality. (Contributed by Mario Carneiro, 7-Oct-2016)
Ref | Expression | ||
---|---|---|---|
Hypotheses | nfeqd.1 | ||
nfeqd.2 | |||
Assertion | nfeqd |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nfeqd.1 | ||
2 | nfeqd.2 | ||
3 | dfcleq | ||
4 | nfv | ||
5 | 1 | nfcrd | |
6 | 2 | nfcrd | |
7 | 5 6 | nfbid | |
8 | 4 7 | nfald | |
9 | 3 8 | nfxfrd |