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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 4839 | . 2 ⊢ 〈𝐴, 𝐵〉 = if((𝐴 ∈ V ∧ 𝐵 ∈ V), {{𝐴}, {𝐴, 𝐵}}, ∅) | |
| 2 | nfop.1 | . . . . 5 ⊢ Ⅎ𝑥𝐴 | |
| 3 | 2 | nfel1 2947 | . . . 4 ⊢ Ⅎ𝑥 𝐴 ∈ V |
| 4 | nfop.2 | . . . . 5 ⊢ Ⅎ𝑥𝐵 | |
| 5 | 4 | nfel1 2947 | . . . 4 ⊢ Ⅎ𝑥 𝐵 ∈ V |
| 6 | 3, 5 | nfan 1926 | . . 3 ⊢ Ⅎ𝑥(𝐴 ∈ V ∧ 𝐵 ∈ V) |
| 7 | 2 | nfsn 4678 | . . . 4 ⊢ Ⅎ𝑥{𝐴} |
| 8 | 2, 4 | nfpr 4663 | . . . 4 ⊢ Ⅎ𝑥{𝐴, 𝐵} |
| 9 | 7, 8 | nfpr 4663 | . . 3 ⊢ Ⅎ𝑥{{𝐴}, {𝐴, 𝐵}} |
| 10 | nfcv 2931 | . . 3 ⊢ Ⅎ𝑥∅ | |
| 11 | 6, 9, 10 | nfif 4523 | . 2 ⊢ Ⅎ𝑥if((𝐴 ∈ V ∧ 𝐵 ∈ V), {{𝐴}, {𝐴, 𝐵}}, ∅) |
| 12 | 1, 11 | nfcxfr 2929 | 1 ⊢ Ⅎ𝑥〈𝐴, 𝐵〉 |
| Colors of variables: wff setvar class |
| Syntax hints: ∧ wa 400 ∈ wcel 2149 Ⅎwnfc 2916 Vcvv 3463 ∅c0 4294 ifcif 4492 {csn 4594 {cpr 4596 〈cop 4600 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-5 1937 ax-6 1994 ax-7 2035 ax-8 2151 ax-9 2159 ax-10 2182 ax-11 2198 ax-12 2219 ax-ext 2741 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1103 df-tru 1570 df-fal 1580 df-ex 1807 df-nf 1811 df-sb 2098 df-clab 2748 df-cleq 2761 df-clel 2844 df-nfc 2918 df-v 3465 df-dif 3916 df-un 3918 df-ss 3930 df-nul 4295 df-if 4493 df-sn 4595 df-pr 4597 df-op 4601 |
| This theorem is referenced by: nfopd 4859 moop2 5486 iunopeqop 5505 iunopeqopOLD 5506 fliftfuns 7313 dfmpo 8097 qliftfuns 8802 xpf1o 9127 nfseq 14047 txcnp 23746 cnmpt1t 23791 cnmpt2t 23799 flfcnp2 24133 nosupbnd2 27846 noinfbnd2 27861 nfseqs 28446 bnj958 35273 bnj1000 35274 bnj1446 35378 bnj1447 35379 bnj1448 35380 bnj1466 35386 bnj1467 35387 bnj1519 35398 bnj1520 35399 bnj1529 35403 poimirlem26 38185 nfopdALT 39635 nfaov 47805 |
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