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Mirrors > Home > ILE Home > Th. List > ercl | GIF version |
Description: Elementhood in the field of an equivalence relation. (Contributed by Mario Carneiro, 12-Aug-2015.) |
Ref | Expression |
---|---|
ersym.1 | ⊢ (𝜑 → 𝑅 Er 𝑋) |
ersym.2 | ⊢ (𝜑 → 𝐴𝑅𝐵) |
Ref | Expression |
---|---|
ercl | ⊢ (𝜑 → 𝐴 ∈ 𝑋) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ersym.1 | . . . 4 ⊢ (𝜑 → 𝑅 Er 𝑋) | |
2 | errel 6138 | . . . 4 ⊢ (𝑅 Er 𝑋 → Rel 𝑅) | |
3 | 1, 2 | syl 14 | . . 3 ⊢ (𝜑 → Rel 𝑅) |
4 | ersym.2 | . . 3 ⊢ (𝜑 → 𝐴𝑅𝐵) | |
5 | releldm 4587 | . . 3 ⊢ ((Rel 𝑅 ∧ 𝐴𝑅𝐵) → 𝐴 ∈ dom 𝑅) | |
6 | 3, 4, 5 | syl2anc 403 | . 2 ⊢ (𝜑 → 𝐴 ∈ dom 𝑅) |
7 | erdm 6139 | . . 3 ⊢ (𝑅 Er 𝑋 → dom 𝑅 = 𝑋) | |
8 | 1, 7 | syl 14 | . 2 ⊢ (𝜑 → dom 𝑅 = 𝑋) |
9 | 6, 8 | eleqtrd 2157 | 1 ⊢ (𝜑 → 𝐴 ∈ 𝑋) |
Colors of variables: wff set class |
Syntax hints: → wi 4 = wceq 1284 ∈ wcel 1433 class class class wbr 3785 dom cdm 4363 Rel wrel 4368 Er wer 6126 |
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-ral 2353 df-rex 2354 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-br 3786 df-opab 3840 df-xp 4369 df-rel 4370 df-dm 4373 df-er 6129 |
This theorem is referenced by: ercl2 6142 erthi 6175 qliftfun 6211 |
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