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| Mirrors > Home > ILE Home > Th. List > eqrelriiv | GIF version | ||
| Description: Inference from extensionality principle for relations. (Contributed by NM, 17-Mar-1995.) |
| Ref | Expression |
|---|---|
| eqreliiv.1 | ⊢ Rel 𝐴 |
| eqreliiv.2 | ⊢ Rel 𝐵 |
| eqreliiv.3 | ⊢ (〈𝑥, 𝑦〉 ∈ 𝐴 ↔ 〈𝑥, 𝑦〉 ∈ 𝐵) |
| Ref | Expression |
|---|---|
| eqrelriiv | ⊢ 𝐴 = 𝐵 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eqreliiv.1 | . 2 ⊢ Rel 𝐴 | |
| 2 | eqreliiv.2 | . 2 ⊢ Rel 𝐵 | |
| 3 | eqreliiv.3 | . . 3 ⊢ (〈𝑥, 𝑦〉 ∈ 𝐴 ↔ 〈𝑥, 𝑦〉 ∈ 𝐵) | |
| 4 | 3 | eqrelriv 4451 | . 2 ⊢ ((Rel 𝐴 ∧ Rel 𝐵) → 𝐴 = 𝐵) |
| 5 | 1, 2, 4 | mp2an 416 | 1 ⊢ 𝐴 = 𝐵 |
| Colors of variables: wff set class |
| Syntax hints: ↔ wb 103 = wceq 1284 ∈ wcel 1433 〈cop 3401 Rel wrel 4368 |
| This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 104 ax-ia2 105 ax-ia3 106 ax-io 662 ax-5 1376 ax-7 1377 ax-gen 1378 ax-ie1 1422 ax-ie2 1423 ax-8 1435 ax-10 1436 ax-11 1437 ax-i12 1438 ax-bndl 1439 ax-4 1440 ax-14 1445 ax-17 1459 ax-i9 1463 ax-ial 1467 ax-i5r 1468 ax-ext 2063 ax-sep 3896 ax-pow 3948 ax-pr 3964 |
| This theorem depends on definitions: df-bi 115 df-3an 921 df-tru 1287 df-nf 1390 df-sb 1686 df-clab 2068 df-cleq 2074 df-clel 2077 df-nfc 2208 df-v 2603 df-un 2977 df-in 2979 df-ss 2986 df-pw 3384 df-sn 3404 df-pr 3405 df-op 3407 df-opab 3840 df-xp 4369 df-rel 4370 |
| This theorem is referenced by: eqbrriv 4453 inopab 4486 difopab 4487 dfres2 4678 cnvopab 4746 cnv0 4747 cnvdif 4750 cnvcnvsn 4817 dfco2 4840 coiun 4850 co02 4854 coass 4859 ressn 4878 |
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