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Mirrors > Home > MPE Home > Th. List > nfcsb1v | Structured version Visualization version GIF version |
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 |
---|---|
nfcsb1v | ⊢ Ⅎ𝑥⦋𝐴 / 𝑥⦌𝐵 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nfcv 2900 | . 2 ⊢ Ⅎ𝑥𝐴 | |
2 | 1 | nfcsb1 3823 | 1 ⊢ Ⅎ𝑥⦋𝐴 / 𝑥⦌𝐵 |
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