Description: Bound-variable hypothesis builder for substitution into a class. (Contributed by NM, 17-Aug-2006) (Revised by Mario Carneiro, 12-Oct-2016)
Ref | Expression | ||
---|---|---|---|
Assertion | nfcsb1v | ⊢ Ⅎ 𝑥 ⦋ 𝐴 / 𝑥 ⦌ 𝐵 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nfcv | ⊢ Ⅎ 𝑥 𝐴 | |
2 | 1 | nfcsb1 | ⊢ Ⅎ 𝑥 ⦋ 𝐴 / 𝑥 ⦌ 𝐵 |