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| Mirrors > Home > ILE Home > Th. List > eqrelrdv | GIF version | ||
| Description: Deduce equality of relations from equivalence of membership. (Contributed by Rodolfo Medina, 10-Oct-2010.) |
| Ref | Expression |
|---|---|
| eqrelrdv.1 | ⊢ Rel 𝐴 |
| eqrelrdv.2 | ⊢ Rel 𝐵 |
| eqrelrdv.3 | ⊢ (𝜑 → (〈𝑥, 𝑦〉 ∈ 𝐴 ↔ 〈𝑥, 𝑦〉 ∈ 𝐵)) |
| Ref | Expression |
|---|---|
| eqrelrdv | ⊢ (𝜑 → 𝐴 = 𝐵) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eqrelrdv.3 | . . 3 ⊢ (𝜑 → (〈𝑥, 𝑦〉 ∈ 𝐴 ↔ 〈𝑥, 𝑦〉 ∈ 𝐵)) | |
| 2 | 1 | alrimivv 1923 | . 2 ⊢ (𝜑 → ∀𝑥∀𝑦(〈𝑥, 𝑦〉 ∈ 𝐴 ↔ 〈𝑥, 𝑦〉 ∈ 𝐵)) |
| 3 | eqrelrdv.1 | . . 3 ⊢ Rel 𝐴 | |
| 4 | eqrelrdv.2 | . . 3 ⊢ Rel 𝐵 | |
| 5 | eqrel 4815 | . . 3 ⊢ ((Rel 𝐴 ∧ Rel 𝐵) → (𝐴 = 𝐵 ↔ ∀𝑥∀𝑦(〈𝑥, 𝑦〉 ∈ 𝐴 ↔ 〈𝑥, 𝑦〉 ∈ 𝐵))) | |
| 6 | 3, 4, 5 | mp2an 426 | . 2 ⊢ (𝐴 = 𝐵 ↔ ∀𝑥∀𝑦(〈𝑥, 𝑦〉 ∈ 𝐴 ↔ 〈𝑥, 𝑦〉 ∈ 𝐵)) |
| 7 | 2, 6 | sylibr 134 | 1 ⊢ (𝜑 → 𝐴 = 𝐵) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ↔ wb 105 ∀wal 1395 = wceq 1397 ∈ wcel 2202 〈cop 3672 Rel wrel 4730 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-14 2205 ax-ext 2213 ax-sep 4207 ax-pow 4264 ax-pr 4299 |
| This theorem depends on definitions: df-bi 117 df-3an 1006 df-tru 1400 df-nf 1509 df-sb 1811 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2363 df-v 2804 df-un 3204 df-in 3206 df-ss 3213 df-pw 3654 df-sn 3675 df-pr 3676 df-op 3678 df-opab 4151 df-xp 4731 df-rel 4732 |
| This theorem is referenced by: eqbrrdiv 4824 fcnvres 5520 fmptco 5813 fisumcom2 11998 fprodcom2fi 12186 lgsquadlem1 15805 lgsquadlem2 15806 |
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