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Mirrors > Home > ILE Home > Th. List > ralcom | GIF version |
Description: Commutation of restricted quantifiers. (Contributed by NM, 13-Oct-1999.) (Revised by Mario Carneiro, 14-Oct-2016.) |
Ref | Expression |
---|---|
ralcom | ⊢ (∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐵 𝜑 ↔ ∀𝑦 ∈ 𝐵 ∀𝑥 ∈ 𝐴 𝜑) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nfcv 2336 | . 2 ⊢ Ⅎ𝑦𝐴 | |
2 | nfcv 2336 | . 2 ⊢ Ⅎ𝑥𝐵 | |
3 | 1, 2 | ralcomf 2655 | 1 ⊢ (∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐵 𝜑 ↔ ∀𝑦 ∈ 𝐵 ∀𝑥 ∈ 𝐴 𝜑) |
Colors of variables: wff set class |
Syntax hints: ↔ wb 105 ∀wral 2472 |
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 710 ax-5 1458 ax-7 1459 ax-gen 1460 ax-ie1 1504 ax-ie2 1505 ax-8 1515 ax-10 1516 ax-11 1517 ax-i12 1518 ax-bndl 1520 ax-4 1521 ax-17 1537 ax-i9 1541 ax-ial 1545 ax-i5r 1546 ax-ext 2175 |
This theorem depends on definitions: df-bi 117 df-nf 1472 df-sb 1774 df-cleq 2186 df-clel 2189 df-nfc 2325 df-ral 2477 |
This theorem is referenced by: ralrot3 2659 ralcom4 2782 ssint 3886 issod 4350 reusv3 4491 cnvpom 5208 cnvsom 5209 fununi 5322 isocnv2 5855 dfsmo2 6340 ixpiinm 6778 rexfiuz 11133 isnsg2 13273 opprsubrngg 13707 opprdomnbg 13770 rmodislmodlem 13846 rmodislmod 13847 tgss2 14247 cnmptcom 14466 |
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