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Mirrors > Home > ILE Home > Th. List > nfov | 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 9 | . . 3 ⊢ (⊤ → Ⅎ𝑥𝐴) |
3 | nfov.2 | . . . 4 ⊢ Ⅎ𝑥𝐹 | |
4 | 3 | a1i 9 | . . 3 ⊢ (⊤ → Ⅎ𝑥𝐹) |
5 | nfov.3 | . . . 4 ⊢ Ⅎ𝑥𝐵 | |
6 | 5 | a1i 9 | . . 3 ⊢ (⊤ → Ⅎ𝑥𝐵) |
7 | 2, 4, 6 | nfovd 5534 | . 2 ⊢ (⊤ → Ⅎ𝑥(𝐴𝐹𝐵)) |
8 | 7 | trud 1252 | 1 ⊢ Ⅎ𝑥(𝐴𝐹𝐵) |
Colors of variables: wff set class |
Syntax hints: ⊤wtru 1244 Ⅎwnfc 2165 (class class class)co 5512 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 99 ax-ia2 100 ax-ia3 101 ax-io 630 ax-5 1336 ax-7 1337 ax-gen 1338 ax-ie1 1382 ax-ie2 1383 ax-8 1395 ax-10 1396 ax-11 1397 ax-i12 1398 ax-bndl 1399 ax-4 1400 ax-17 1419 ax-i9 1423 ax-ial 1427 ax-i5r 1428 ax-ext 2022 |
This theorem depends on definitions: df-bi 110 df-3an 887 df-tru 1246 df-nf 1350 df-sb 1646 df-clab 2027 df-cleq 2033 df-clel 2036 df-nfc 2167 df-rex 2312 df-v 2559 df-un 2922 df-sn 3381 df-pr 3382 df-op 3384 df-uni 3581 df-br 3765 df-iota 4867 df-fv 4910 df-ov 5515 |
This theorem is referenced by: csbov123g 5543 ovmpt2s 5624 ov2gf 5625 ovmpt2dxf 5626 ovmpt2dv2 5634 ovi3 5637 offval2 5726 caucvgprprlemaddq 6806 nfiseq 9218 |
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