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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 6424 | . 2 ⊢ [𝐴]𝑅 = (𝑅 “ {𝐴}) | |
2 | ecqs.1 | . . 3 ⊢ 𝑅 ∈ V | |
3 | uniqs 6480 | . . 3 ⊢ (𝑅 ∈ V → ∪ ({𝐴} / 𝑅) = (𝑅 “ {𝐴})) | |
4 | 2, 3 | ax-mp 5 | . 2 ⊢ ∪ ({𝐴} / 𝑅) = (𝑅 “ {𝐴}) |
5 | 1, 4 | eqtr4i 2161 | 1 ⊢ [𝐴]𝑅 = ∪ ({𝐴} / 𝑅) |
Colors of variables: wff set class |
Syntax hints: = wceq 1331 ∈ wcel 1480 Vcvv 2681 {csn 3522 ∪ cuni 3731 “ cima 4537 [cec 6420 / cqs 6421 |
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 698 ax-5 1423 ax-7 1424 ax-gen 1425 ax-ie1 1469 ax-ie2 1470 ax-8 1482 ax-10 1483 ax-11 1484 ax-i12 1485 ax-bndl 1486 ax-4 1487 ax-13 1491 ax-14 1492 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-ext 2119 ax-sep 4041 ax-pow 4093 ax-pr 4126 ax-un 4350 |
This theorem depends on definitions: df-bi 116 df-3an 964 df-tru 1334 df-nf 1437 df-sb 1736 df-eu 2000 df-mo 2001 df-clab 2124 df-cleq 2130 df-clel 2133 df-nfc 2268 df-ral 2419 df-rex 2420 df-v 2683 df-un 3070 df-in 3072 df-ss 3079 df-pw 3507 df-sn 3528 df-pr 3529 df-op 3531 df-uni 3732 df-iun 3810 df-br 3925 df-opab 3985 df-xp 4540 df-cnv 4542 df-dm 4544 df-rn 4545 df-res 4546 df-ima 4547 df-ec 6424 df-qs 6428 |
This theorem is referenced by: (None) |
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