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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 5678 | . 2 ⊢ (⊤ → Ⅎ𝑥(𝐴𝐹𝐵)) |
8 | 7 | mptru 1298 | 1 ⊢ Ⅎ𝑥(𝐴𝐹𝐵) |
Colors of variables: wff set class |
Syntax hints: ⊤wtru 1290 Ⅎwnfc 2215 (class class class)co 5652 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 104 ax-ia2 105 ax-ia3 106 ax-io 665 ax-5 1381 ax-7 1382 ax-gen 1383 ax-ie1 1427 ax-ie2 1428 ax-8 1440 ax-10 1441 ax-11 1442 ax-i12 1443 ax-bndl 1444 ax-4 1445 ax-17 1464 ax-i9 1468 ax-ial 1472 ax-i5r 1473 ax-ext 2070 |
This theorem depends on definitions: df-bi 115 df-3an 926 df-tru 1292 df-nf 1395 df-sb 1693 df-clab 2075 df-cleq 2081 df-clel 2084 df-nfc 2217 df-rex 2365 df-v 2621 df-un 3003 df-sn 3452 df-pr 3453 df-op 3455 df-uni 3654 df-br 3846 df-iota 4980 df-fv 5023 df-ov 5655 |
This theorem is referenced by: csbov123g 5687 ovmpt2s 5768 ov2gf 5769 ovmpt2dxf 5770 ovmpt2dv2 5778 ovi3 5781 nfof 5861 offval2 5870 caucvgprprlemaddq 7267 nfiseq 9868 fsumadd 10800 isummulc2 10820 mertenslem2 10930 oddpwdclemdvds 11426 oddpwdclemndvds 11427 |
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