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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 4826 | . 2 ⊢ 〈𝐴, 𝐵〉 = if((𝐴 ∈ V ∧ 𝐵 ∈ V), {{𝐴}, {𝐴, 𝐵}}, ∅) | |
| 2 | nfop.1 | . . . . 5 ⊢ Ⅎ𝑥𝐴 | |
| 3 | 2 | nfel1 2915 | . . . 4 ⊢ Ⅎ𝑥 𝐴 ∈ V |
| 4 | nfop.2 | . . . . 5 ⊢ Ⅎ𝑥𝐵 | |
| 5 | 4 | nfel1 2915 | . . . 4 ⊢ Ⅎ𝑥 𝐵 ∈ V |
| 6 | 3, 5 | nfan 1900 | . . 3 ⊢ Ⅎ𝑥(𝐴 ∈ V ∧ 𝐵 ∈ V) |
| 7 | 2 | nfsn 4664 | . . . 4 ⊢ Ⅎ𝑥{𝐴} |
| 8 | 2, 4 | nfpr 4649 | . . . 4 ⊢ Ⅎ𝑥{𝐴, 𝐵} |
| 9 | 7, 8 | nfpr 4649 | . . 3 ⊢ Ⅎ𝑥{{𝐴}, {𝐴, 𝐵}} |
| 10 | nfcv 2898 | . . 3 ⊢ Ⅎ𝑥∅ | |
| 11 | 6, 9, 10 | nfif 4510 | . 2 ⊢ Ⅎ𝑥if((𝐴 ∈ V ∧ 𝐵 ∈ V), {{𝐴}, {𝐴, 𝐵}}, ∅) |
| 12 | 1, 11 | nfcxfr 2896 | 1 ⊢ Ⅎ𝑥〈𝐴, 𝐵〉 |
| Colors of variables: wff setvar class |
| Syntax hints: ∧ wa 395 ∈ wcel 2113 Ⅎwnfc 2883 Vcvv 3440 ∅c0 4285 ifcif 4479 {csn 4580 {cpr 4582 〈cop 4586 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-10 2146 ax-11 2162 ax-12 2184 ax-ext 2708 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-clab 2715 df-cleq 2728 df-clel 2811 df-nfc 2885 df-v 3442 df-dif 3904 df-un 3906 df-ss 3918 df-nul 4286 df-if 4480 df-sn 4581 df-pr 4583 df-op 4587 |
| This theorem is referenced by: nfopd 4846 moop2 5450 iunopeqop 5469 fliftfuns 7260 dfmpo 8044 qliftfuns 8743 xpf1o 9069 nfseq 13936 txcnp 23566 cnmpt1t 23611 cnmpt2t 23619 flfcnp2 23953 nosupbnd2 27686 noinfbnd2 27701 nfseqs 28285 bnj958 35098 bnj1000 35099 bnj1446 35203 bnj1447 35204 bnj1448 35205 bnj1466 35211 bnj1467 35212 bnj1519 35223 bnj1520 35224 bnj1529 35228 poimirlem26 37849 nfopdALT 39253 nfaov 47446 |
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