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Mirrors > Home > ILE Home > Th. List > ecovcom | GIF version |
Description: Lemma used to transfer a commutative law via an equivalence relation. Most uses will want ecovicom 6600 instead. (Contributed by NM, 29-Aug-1995.) (Revised by David Abernethy, 4-Jun-2013.) |
Ref | Expression |
---|---|
ecovcom.1 | ⊢ 𝐶 = ((𝑆 × 𝑆) / ∼ ) |
ecovcom.2 | ⊢ (((𝑥 ∈ 𝑆 ∧ 𝑦 ∈ 𝑆) ∧ (𝑧 ∈ 𝑆 ∧ 𝑤 ∈ 𝑆)) → ([〈𝑥, 𝑦〉] ∼ + [〈𝑧, 𝑤〉] ∼ ) = [〈𝐷, 𝐺〉] ∼ ) |
ecovcom.3 | ⊢ (((𝑧 ∈ 𝑆 ∧ 𝑤 ∈ 𝑆) ∧ (𝑥 ∈ 𝑆 ∧ 𝑦 ∈ 𝑆)) → ([〈𝑧, 𝑤〉] ∼ + [〈𝑥, 𝑦〉] ∼ ) = [〈𝐻, 𝐽〉] ∼ ) |
ecovcom.4 | ⊢ 𝐷 = 𝐻 |
ecovcom.5 | ⊢ 𝐺 = 𝐽 |
Ref | Expression |
---|---|
ecovcom | ⊢ ((𝐴 ∈ 𝐶 ∧ 𝐵 ∈ 𝐶) → (𝐴 + 𝐵) = (𝐵 + 𝐴)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ecovcom.1 | . 2 ⊢ 𝐶 = ((𝑆 × 𝑆) / ∼ ) | |
2 | oveq1 5843 | . . 3 ⊢ ([〈𝑥, 𝑦〉] ∼ = 𝐴 → ([〈𝑥, 𝑦〉] ∼ + [〈𝑧, 𝑤〉] ∼ ) = (𝐴 + [〈𝑧, 𝑤〉] ∼ )) | |
3 | oveq2 5844 | . . 3 ⊢ ([〈𝑥, 𝑦〉] ∼ = 𝐴 → ([〈𝑧, 𝑤〉] ∼ + [〈𝑥, 𝑦〉] ∼ ) = ([〈𝑧, 𝑤〉] ∼ + 𝐴)) | |
4 | 2, 3 | eqeq12d 2179 | . 2 ⊢ ([〈𝑥, 𝑦〉] ∼ = 𝐴 → (([〈𝑥, 𝑦〉] ∼ + [〈𝑧, 𝑤〉] ∼ ) = ([〈𝑧, 𝑤〉] ∼ + [〈𝑥, 𝑦〉] ∼ ) ↔ (𝐴 + [〈𝑧, 𝑤〉] ∼ ) = ([〈𝑧, 𝑤〉] ∼ + 𝐴))) |
5 | oveq2 5844 | . . 3 ⊢ ([〈𝑧, 𝑤〉] ∼ = 𝐵 → (𝐴 + [〈𝑧, 𝑤〉] ∼ ) = (𝐴 + 𝐵)) | |
6 | oveq1 5843 | . . 3 ⊢ ([〈𝑧, 𝑤〉] ∼ = 𝐵 → ([〈𝑧, 𝑤〉] ∼ + 𝐴) = (𝐵 + 𝐴)) | |
7 | 5, 6 | eqeq12d 2179 | . 2 ⊢ ([〈𝑧, 𝑤〉] ∼ = 𝐵 → ((𝐴 + [〈𝑧, 𝑤〉] ∼ ) = ([〈𝑧, 𝑤〉] ∼ + 𝐴) ↔ (𝐴 + 𝐵) = (𝐵 + 𝐴))) |
8 | ecovcom.4 | . . . 4 ⊢ 𝐷 = 𝐻 | |
9 | ecovcom.5 | . . . 4 ⊢ 𝐺 = 𝐽 | |
10 | opeq12 3754 | . . . . 5 ⊢ ((𝐷 = 𝐻 ∧ 𝐺 = 𝐽) → 〈𝐷, 𝐺〉 = 〈𝐻, 𝐽〉) | |
11 | 10 | eceq1d 6528 | . . . 4 ⊢ ((𝐷 = 𝐻 ∧ 𝐺 = 𝐽) → [〈𝐷, 𝐺〉] ∼ = [〈𝐻, 𝐽〉] ∼ ) |
12 | 8, 9, 11 | mp2an 423 | . . 3 ⊢ [〈𝐷, 𝐺〉] ∼ = [〈𝐻, 𝐽〉] ∼ |
13 | ecovcom.2 | . . 3 ⊢ (((𝑥 ∈ 𝑆 ∧ 𝑦 ∈ 𝑆) ∧ (𝑧 ∈ 𝑆 ∧ 𝑤 ∈ 𝑆)) → ([〈𝑥, 𝑦〉] ∼ + [〈𝑧, 𝑤〉] ∼ ) = [〈𝐷, 𝐺〉] ∼ ) | |
14 | ecovcom.3 | . . . 4 ⊢ (((𝑧 ∈ 𝑆 ∧ 𝑤 ∈ 𝑆) ∧ (𝑥 ∈ 𝑆 ∧ 𝑦 ∈ 𝑆)) → ([〈𝑧, 𝑤〉] ∼ + [〈𝑥, 𝑦〉] ∼ ) = [〈𝐻, 𝐽〉] ∼ ) | |
15 | 14 | ancoms 266 | . . 3 ⊢ (((𝑥 ∈ 𝑆 ∧ 𝑦 ∈ 𝑆) ∧ (𝑧 ∈ 𝑆 ∧ 𝑤 ∈ 𝑆)) → ([〈𝑧, 𝑤〉] ∼ + [〈𝑥, 𝑦〉] ∼ ) = [〈𝐻, 𝐽〉] ∼ ) |
16 | 12, 13, 15 | 3eqtr4a 2223 | . 2 ⊢ (((𝑥 ∈ 𝑆 ∧ 𝑦 ∈ 𝑆) ∧ (𝑧 ∈ 𝑆 ∧ 𝑤 ∈ 𝑆)) → ([〈𝑥, 𝑦〉] ∼ + [〈𝑧, 𝑤〉] ∼ ) = ([〈𝑧, 𝑤〉] ∼ + [〈𝑥, 𝑦〉] ∼ )) |
17 | 1, 4, 7, 16 | 2ecoptocl 6580 | 1 ⊢ ((𝐴 ∈ 𝐶 ∧ 𝐵 ∈ 𝐶) → (𝐴 + 𝐵) = (𝐵 + 𝐴)) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∧ wa 103 = wceq 1342 ∈ wcel 2135 〈cop 3573 × cxp 4596 (class class class)co 5836 [cec 6490 / cqs 6491 |
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 699 ax-5 1434 ax-7 1435 ax-gen 1436 ax-ie1 1480 ax-ie2 1481 ax-8 1491 ax-10 1492 ax-11 1493 ax-i12 1494 ax-bndl 1496 ax-4 1497 ax-17 1513 ax-i9 1517 ax-ial 1521 ax-i5r 1522 ax-14 2138 ax-ext 2146 ax-sep 4094 ax-pow 4147 ax-pr 4181 |
This theorem depends on definitions: df-bi 116 df-3an 969 df-tru 1345 df-nf 1448 df-sb 1750 df-clab 2151 df-cleq 2157 df-clel 2160 df-nfc 2295 df-ral 2447 df-rex 2448 df-v 2723 df-un 3115 df-in 3117 df-ss 3124 df-pw 3555 df-sn 3576 df-pr 3577 df-op 3579 df-uni 3784 df-br 3977 df-opab 4038 df-xp 4604 df-cnv 4606 df-dm 4608 df-rn 4609 df-res 4610 df-ima 4611 df-iota 5147 df-fv 5190 df-ov 5839 df-ec 6494 df-qs 6498 |
This theorem is referenced by: (None) |
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