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| Mirrors > Home > ILE Home > Th. List > ecqs | GIF version | ||
| Description: Equivalence class in terms of quotient set. (Contributed by NM, 29-Jan-1999.) |
| Ref | Expression |
|---|---|
| ecqs.1 | ⊢ 𝑅 ∈ V |
| Ref | Expression |
|---|---|
| ecqs | ⊢ [𝐴]𝑅 = ∪ ({𝐴} / 𝑅) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-ec 6799 | . 2 ⊢ [𝐴]𝑅 = (𝑅 “ {𝐴}) | |
| 2 | ecqs.1 | . . 3 ⊢ 𝑅 ∈ V | |
| 3 | uniqs 6857 | . . 3 ⊢ (𝑅 ∈ V → ∪ ({𝐴} / 𝑅) = (𝑅 “ {𝐴})) | |
| 4 | 2, 3 | ax-mp 5 | . 2 ⊢ ∪ ({𝐴} / 𝑅) = (𝑅 “ {𝐴}) |
| 5 | 1, 4 | eqtr4i 2262 | 1 ⊢ [𝐴]𝑅 = ∪ ({𝐴} / 𝑅) |
| Colors of variables: wff set class |
| Syntax hints: = wceq 1402 ∈ wcel 2209 Vcvv 2821 {csn 3705 ∪ cuni 3930 “ cima 4772 [cec 6795 / cqs 6796 |
| 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 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-14 2212 ax-ext 2220 ax-sep 4244 ax-pow 4306 ax-pr 4341 ax-un 4573 |
| This theorem depends on definitions: df-bi 117 df-3an 1011 df-tru 1405 df-nf 1514 df-sb 1816 df-eu 2089 df-mo 2090 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ral 2533 df-rex 2534 df-v 2823 df-un 3224 df-in 3226 df-ss 3233 df-pw 3687 df-sn 3711 df-pr 3712 df-op 3714 df-uni 3931 df-iun 4009 df-br 4126 df-opab 4188 df-xp 4775 df-cnv 4777 df-dm 4779 df-rn 4780 df-res 4781 df-ima 4782 df-ec 6799 df-qs 6803 |
| This theorem is referenced by: (None) |
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