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Mirrors > Home > MPE Home > Th. List > nfop | Structured version Visualization version GIF version |
Description: Bound-variable hypothesis builder for ordered pairs. (Contributed by NM, 14-Nov-1995.) |
Ref | Expression |
---|---|
nfop.1 | ⊢ Ⅎ𝑥𝐴 |
nfop.2 | ⊢ Ⅎ𝑥𝐵 |
Ref | Expression |
---|---|
nfop | ⊢ Ⅎ𝑥〈𝐴, 𝐵〉 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | dfopif 4760 | . 2 ⊢ 〈𝐴, 𝐵〉 = if((𝐴 ∈ V ∧ 𝐵 ∈ V), {{𝐴}, {𝐴, 𝐵}}, ∅) | |
2 | nfop.1 | . . . . 5 ⊢ Ⅎ𝑥𝐴 | |
3 | 2 | nfel1 2971 | . . . 4 ⊢ Ⅎ𝑥 𝐴 ∈ V |
4 | nfop.2 | . . . . 5 ⊢ Ⅎ𝑥𝐵 | |
5 | 4 | nfel1 2971 | . . . 4 ⊢ Ⅎ𝑥 𝐵 ∈ V |
6 | 3, 5 | nfan 1900 | . . 3 ⊢ Ⅎ𝑥(𝐴 ∈ V ∧ 𝐵 ∈ V) |
7 | 2 | nfsn 4603 | . . . 4 ⊢ Ⅎ𝑥{𝐴} |
8 | 2, 4 | nfpr 4588 | . . . 4 ⊢ Ⅎ𝑥{𝐴, 𝐵} |
9 | 7, 8 | nfpr 4588 | . . 3 ⊢ Ⅎ𝑥{{𝐴}, {𝐴, 𝐵}} |
10 | nfcv 2955 | . . 3 ⊢ Ⅎ𝑥∅ | |
11 | 6, 9, 10 | nfif 4454 | . 2 ⊢ Ⅎ𝑥if((𝐴 ∈ V ∧ 𝐵 ∈ V), {{𝐴}, {𝐴, 𝐵}}, ∅) |
12 | 1, 11 | nfcxfr 2953 | 1 ⊢ Ⅎ𝑥〈𝐴, 𝐵〉 |
Colors of variables: wff setvar class |
Syntax hints: ∧ wa 399 ∈ wcel 2111 Ⅎwnfc 2936 Vcvv 3441 ∅c0 4243 ifcif 4425 {csn 4525 {cpr 4527 〈cop 4531 |
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-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 |
This theorem is referenced by: nfopd 4782 moop2 5357 iunopeqop 5376 fliftfuns 7046 dfmpo 7780 qliftfuns 8367 xpf1o 8663 nfseq 13374 txcnp 22225 cnmpt1t 22270 cnmpt2t 22278 flfcnp2 22612 bnj958 32322 bnj1000 32323 bnj1446 32427 bnj1447 32428 bnj1448 32429 bnj1466 32435 bnj1467 32436 bnj1519 32447 bnj1520 32448 bnj1529 32452 nosupbnd2 33329 poimirlem26 35083 nfopdALT 36267 nfaov 43735 |
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