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Mirrors > Home > MPE Home > Th. List > nfovd | Structured version Visualization version GIF version |
Description: Deduction version of bound-variable hypothesis builder nfov 7165. (Contributed by NM, 13-Dec-2005.) (Proof shortened by Andrew Salmon, 22-Oct-2011.) |
Ref | Expression |
---|---|
nfovd.2 | ⊢ (𝜑 → Ⅎ𝑥𝐴) |
nfovd.3 | ⊢ (𝜑 → Ⅎ𝑥𝐹) |
nfovd.4 | ⊢ (𝜑 → Ⅎ𝑥𝐵) |
Ref | Expression |
---|---|
nfovd | ⊢ (𝜑 → Ⅎ𝑥(𝐴𝐹𝐵)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-ov 7138 | . 2 ⊢ (𝐴𝐹𝐵) = (𝐹‘〈𝐴, 𝐵〉) | |
2 | nfovd.3 | . . 3 ⊢ (𝜑 → Ⅎ𝑥𝐹) | |
3 | nfovd.2 | . . . 4 ⊢ (𝜑 → Ⅎ𝑥𝐴) | |
4 | nfovd.4 | . . . 4 ⊢ (𝜑 → Ⅎ𝑥𝐵) | |
5 | 3, 4 | nfopd 4782 | . . 3 ⊢ (𝜑 → Ⅎ𝑥〈𝐴, 𝐵〉) |
6 | 2, 5 | nffvd 6657 | . 2 ⊢ (𝜑 → Ⅎ𝑥(𝐹‘〈𝐴, 𝐵〉)) |
7 | 1, 6 | nfcxfrd 2954 | 1 ⊢ (𝜑 → Ⅎ𝑥(𝐴𝐹𝐵)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 Ⅎwnfc 2936 〈cop 4531 ‘cfv 6324 (class class class)co 7135 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2113 ax-9 2121 ax-10 2142 ax-11 2158 ax-12 2175 ax-ext 2770 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 845 df-3an 1086 df-tru 1541 df-ex 1782 df-nf 1786 df-sb 2070 df-clab 2777 df-cleq 2791 df-clel 2870 df-nfc 2938 df-ral 3111 df-rex 3112 df-v 3443 df-dif 3884 df-un 3886 df-in 3888 df-ss 3898 df-nul 4244 df-if 4426 df-sn 4526 df-pr 4528 df-op 4532 df-uni 4801 df-br 5031 df-iota 6283 df-fv 6332 df-ov 7138 |
This theorem is referenced by: nfov 7165 nfnegd 10870 |
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