| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| 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 4828 | . 2 ⊢ 〈𝐴, 𝐵〉 = if((𝐴 ∈ V ∧ 𝐵 ∈ V), {{𝐴}, {𝐴, 𝐵}}, ∅) | |
| 2 | nfop.1 | . . . . 5 ⊢ Ⅎ𝑥𝐴 | |
| 3 | 2 | nfel1 2940 | . . . 4 ⊢ Ⅎ𝑥 𝐴 ∈ V |
| 4 | nfop.2 | . . . . 5 ⊢ Ⅎ𝑥𝐵 | |
| 5 | 4 | nfel1 2940 | . . . 4 ⊢ Ⅎ𝑥 𝐵 ∈ V |
| 6 | 3, 5 | nfan 1919 | . . 3 ⊢ Ⅎ𝑥(𝐴 ∈ V ∧ 𝐵 ∈ V) |
| 7 | 2 | nfsn 4666 | . . . 4 ⊢ Ⅎ𝑥{𝐴} |
| 8 | 2, 4 | nfpr 4651 | . . . 4 ⊢ Ⅎ𝑥{𝐴, 𝐵} |
| 9 | 7, 8 | nfpr 4651 | . . 3 ⊢ Ⅎ𝑥{{𝐴}, {𝐴, 𝐵}} |
| 10 | nfcv 2924 | . . 3 ⊢ Ⅎ𝑥∅ | |
| 11 | 6, 9, 10 | nfif 4511 | . 2 ⊢ Ⅎ𝑥if((𝐴 ∈ V ∧ 𝐵 ∈ V), {{𝐴}, {𝐴, 𝐵}}, ∅) |
| 12 | 1, 11 | nfcxfr 2922 | 1 ⊢ Ⅎ𝑥〈𝐴, 𝐵〉 |
| Colors of variables: wff setvar class |
| Syntax hints: ∧ wa 399 ∈ wcel 2142 Ⅎwnfc 2909 Vcvv 3454 ∅c0 4285 ifcif 4480 {csn 4582 {cpr 4584 〈cop 4588 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1815 ax-4 1829 ax-5 1930 ax-6 1987 ax-7 2028 ax-8 2144 ax-9 2152 ax-10 2175 ax-11 2191 ax-12 2212 ax-ext 2734 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3an 1100 df-tru 1563 df-fal 1573 df-ex 1800 df-nf 1804 df-sb 2091 df-clab 2741 df-cleq 2754 df-clel 2837 df-nfc 2911 df-v 3456 df-dif 3907 df-un 3909 df-ss 3921 df-nul 4286 df-if 4481 df-sn 4583 df-pr 4585 df-op 4589 |
| This theorem is referenced by: nfopd 4848 moop2 5471 iunopeqop 5490 iunopeqopOLD 5491 fliftfuns 7298 dfmpo 8081 qliftfuns 8786 xpf1o 9111 nfseq 14024 txcnp 23680 cnmpt1t 23725 cnmpt2t 23733 flfcnp2 24067 nosupbnd2 27780 noinfbnd2 27795 nfseqs 28380 bnj958 35235 bnj1000 35236 bnj1446 35340 bnj1447 35341 bnj1448 35342 bnj1466 35348 bnj1467 35349 bnj1519 35360 bnj1520 35361 bnj1529 35365 poimirlem26 38145 nfopdALT 39595 nfaov 47773 |
| Copyright terms: Public domain | W3C validator |