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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 4801 | . 2 ⊢ 〈𝐴, 𝐵〉 = if((𝐴 ∈ V ∧ 𝐵 ∈ V), {{𝐴}, {𝐴, 𝐵}}, ∅) | |
| 2 | nfop.1 | . . . . 5 ⊢ Ⅎ𝑥𝐴 | |
| 3 | 2 | nfel1 2917 | . . . 4 ⊢ Ⅎ𝑥 𝐴 ∈ V |
| 4 | nfop.2 | . . . . 5 ⊢ Ⅎ𝑥𝐵 | |
| 5 | 4 | nfel1 2917 | . . . 4 ⊢ Ⅎ𝑥 𝐵 ∈ V |
| 6 | 3, 5 | nfan 1906 | . . 3 ⊢ Ⅎ𝑥(𝐴 ∈ V ∧ 𝐵 ∈ V) |
| 7 | 2 | nfsn 4639 | . . . 4 ⊢ Ⅎ𝑥{𝐴} |
| 8 | 2, 4 | nfpr 4624 | . . . 4 ⊢ Ⅎ𝑥{𝐴, 𝐵} |
| 9 | 7, 8 | nfpr 4624 | . . 3 ⊢ Ⅎ𝑥{{𝐴}, {𝐴, 𝐵}} |
| 10 | nfcv 2901 | . . 3 ⊢ Ⅎ𝑥∅ | |
| 11 | 6, 9, 10 | nfif 4485 | . 2 ⊢ Ⅎ𝑥if((𝐴 ∈ V ∧ 𝐵 ∈ V), {{𝐴}, {𝐴, 𝐵}}, ∅) |
| 12 | 1, 11 | nfcxfr 2899 | 1 ⊢ Ⅎ𝑥〈𝐴, 𝐵〉 |
| Colors of variables: wff setvar class |
| Syntax hints: ∧ wa 396 ∈ wcel 2119 Ⅎwnfc 2886 Vcvv 3431 ∅c0 4261 ifcif 4454 {csn 4555 {cpr 4557 〈cop 4561 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1974 ax-7 2015 ax-8 2121 ax-9 2129 ax-10 2152 ax-11 2168 ax-12 2189 ax-ext 2711 |
| This theorem depends on definitions: df-bi 208 df-an 397 df-or 854 df-3an 1094 df-tru 1550 df-fal 1560 df-ex 1787 df-nf 1791 df-sb 2074 df-clab 2718 df-cleq 2731 df-clel 2814 df-nfc 2888 df-v 3433 df-dif 3886 df-un 3888 df-ss 3900 df-nul 4262 df-if 4455 df-sn 4556 df-pr 4558 df-op 4562 |
| This theorem is referenced by: nfopd 4821 moop2 5443 iunopeqop 5462 iunopeqopOLD 5463 fliftfuns 7258 dfmpo 8041 qliftfuns 8741 xpf1o 9067 nfseq 13964 txcnp 23603 cnmpt1t 23648 cnmpt2t 23656 flfcnp2 23990 nosupbnd2 27698 noinfbnd2 27713 nfseqs 28297 bnj958 35122 bnj1000 35123 bnj1446 35227 bnj1447 35228 bnj1448 35229 bnj1466 35235 bnj1467 35236 bnj1519 35247 bnj1520 35248 bnj1529 35252 poimirlem26 38013 nfopdALT 39463 nfaov 47642 |
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