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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 4835 | . 2 ⊢ 〈𝐴, 𝐵〉 = if((𝐴 ∈ V ∧ 𝐵 ∈ V), {{𝐴}, {𝐴, 𝐵}}, ∅) | |
| 2 | nfop.1 | . . . . 5 ⊢ Ⅎ𝑥𝐴 | |
| 3 | 2 | nfel1 2941 | . . . 4 ⊢ Ⅎ𝑥 𝐴 ∈ V |
| 4 | nfop.2 | . . . . 5 ⊢ Ⅎ𝑥𝐵 | |
| 5 | 4 | nfel1 2941 | . . . 4 ⊢ Ⅎ𝑥 𝐵 ∈ V |
| 6 | 3, 5 | nfan 1929 | . . 3 ⊢ Ⅎ𝑥(𝐴 ∈ V ∧ 𝐵 ∈ V) |
| 7 | 2 | nfsn 4673 | . . . 4 ⊢ Ⅎ𝑥{𝐴} |
| 8 | 2, 4 | nfpr 4658 | . . . 4 ⊢ Ⅎ𝑥{𝐴, 𝐵} |
| 9 | 7, 8 | nfpr 4658 | . . 3 ⊢ Ⅎ𝑥{{𝐴}, {𝐴, 𝐵}} |
| 10 | nfcv 2925 | . . 3 ⊢ Ⅎ𝑥∅ | |
| 11 | 6, 9, 10 | nfif 4518 | . 2 ⊢ Ⅎ𝑥if((𝐴 ∈ V ∧ 𝐵 ∈ V), {{𝐴}, {𝐴, 𝐵}}, ∅) |
| 12 | 1, 11 | nfcxfr 2923 | 1 ⊢ Ⅎ𝑥〈𝐴, 𝐵〉 |
| Colors of variables: wff setvar class |
| Syntax hints: ∧ wa 400 ∈ wcel 2143 Ⅎwnfc 2910 Vcvv 3455 ∅c0 4286 ifcif 4487 {csn 4589 {cpr 4591 〈cop 4595 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-10 2176 ax-11 2192 ax-12 2213 ax-ext 2735 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-nf 1814 df-sb 2097 df-clab 2742 df-cleq 2755 df-clel 2838 df-nfc 2912 df-v 3457 df-dif 3908 df-un 3910 df-ss 3922 df-nul 4287 df-if 4488 df-sn 4590 df-pr 4592 df-op 4596 |
| This theorem is referenced by: nfopd 4855 moop2 5485 iunopeqop 5504 iunopeqopOLD 5505 fliftfuns 7312 dfmpo 8093 qliftfuns 8798 xpf1o 9123 nfseq 14043 txcnp 23777 cnmpt1t 23822 cnmpt2t 23830 flfcnp2 24164 nosupbnd2 27880 noinfbnd2 27895 nfseqs 28480 bnj958 35328 bnj1000 35329 bnj1446 35433 bnj1447 35434 bnj1448 35435 bnj1466 35441 bnj1467 35442 bnj1519 35453 bnj1520 35454 bnj1529 35458 poimirlem26 38317 nfopdALT 39765 nfaov 47936 |
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