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Mirrors > Home > MPE Home > Th. List > nfov | Structured version Visualization version GIF version |
Description: Bound-variable hypothesis builder for operation value. (Contributed by NM, 4-May-2004.) |
Ref | Expression |
---|---|
nfov.1 | ⊢ Ⅎ𝑥𝐴 |
nfov.2 | ⊢ Ⅎ𝑥𝐹 |
nfov.3 | ⊢ Ⅎ𝑥𝐵 |
Ref | Expression |
---|---|
nfov | ⊢ Ⅎ𝑥(𝐴𝐹𝐵) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nfov.1 | . . . 4 ⊢ Ⅎ𝑥𝐴 | |
2 | 1 | a1i 11 | . . 3 ⊢ (⊤ → Ⅎ𝑥𝐴) |
3 | nfov.2 | . . . 4 ⊢ Ⅎ𝑥𝐹 | |
4 | 3 | a1i 11 | . . 3 ⊢ (⊤ → Ⅎ𝑥𝐹) |
5 | nfov.3 | . . . 4 ⊢ Ⅎ𝑥𝐵 | |
6 | 5 | a1i 11 | . . 3 ⊢ (⊤ → Ⅎ𝑥𝐵) |
7 | 2, 4, 6 | nfovd 7298 | . 2 ⊢ (⊤ → Ⅎ𝑥(𝐴𝐹𝐵)) |
8 | 7 | mptru 1549 | 1 ⊢ Ⅎ𝑥(𝐴𝐹𝐵) |
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