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Mirrors > Home > ILE Home > Th. List > nfop | 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 | df-op 3592 | . 2 ⊢ 〈𝐴, 𝐵〉 = {𝑦 ∣ (𝐴 ∈ V ∧ 𝐵 ∈ V ∧ 𝑦 ∈ {{𝐴}, {𝐴, 𝐵}})} | |
2 | nfop.1 | . . . . 5 ⊢ Ⅎ𝑥𝐴 | |
3 | 2 | nfel1 2323 | . . . 4 ⊢ Ⅎ𝑥 𝐴 ∈ V |
4 | nfop.2 | . . . . 5 ⊢ Ⅎ𝑥𝐵 | |
5 | 4 | nfel1 2323 | . . . 4 ⊢ Ⅎ𝑥 𝐵 ∈ V |
6 | 2 | nfsn 3643 | . . . . . 6 ⊢ Ⅎ𝑥{𝐴} |
7 | 2, 4 | nfpr 3633 | . . . . . 6 ⊢ Ⅎ𝑥{𝐴, 𝐵} |
8 | 6, 7 | nfpr 3633 | . . . . 5 ⊢ Ⅎ𝑥{{𝐴}, {𝐴, 𝐵}} |
9 | 8 | nfcri 2306 | . . . 4 ⊢ Ⅎ𝑥 𝑦 ∈ {{𝐴}, {𝐴, 𝐵}} |
10 | 3, 5, 9 | nf3an 1559 | . . 3 ⊢ Ⅎ𝑥(𝐴 ∈ V ∧ 𝐵 ∈ V ∧ 𝑦 ∈ {{𝐴}, {𝐴, 𝐵}}) |
11 | 10 | nfab 2317 | . 2 ⊢ Ⅎ𝑥{𝑦 ∣ (𝐴 ∈ V ∧ 𝐵 ∈ V ∧ 𝑦 ∈ {{𝐴}, {𝐴, 𝐵}})} |
12 | 1, 11 | nfcxfr 2309 | 1 ⊢ Ⅎ𝑥〈𝐴, 𝐵〉 |
Colors of variables: wff set class |
Syntax hints: ∧ w3a 973 ∈ wcel 2141 {cab 2156 Ⅎwnfc 2299 Vcvv 2730 {csn 3583 {cpr 3584 〈cop 3586 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-io 704 ax-5 1440 ax-7 1441 ax-gen 1442 ax-ie1 1486 ax-ie2 1487 ax-8 1497 ax-10 1498 ax-11 1499 ax-i12 1500 ax-bndl 1502 ax-4 1503 ax-17 1519 ax-i9 1523 ax-ial 1527 ax-i5r 1528 ax-ext 2152 |
This theorem depends on definitions: df-bi 116 df-3an 975 df-tru 1351 df-nf 1454 df-sb 1756 df-clab 2157 df-cleq 2163 df-clel 2166 df-nfc 2301 df-v 2732 df-un 3125 df-sn 3589 df-pr 3590 df-op 3592 |
This theorem is referenced by: nfopd 3782 moop2 4236 fliftfuns 5777 dfmpo 6202 qliftfuns 6597 xpf1o 6822 caucvgprprlemaddq 7670 nfseq 10411 txcnp 13065 cnmpt1t 13079 cnmpt2t 13087 |
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