| Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
| 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 2339 | . 2 ⊢ Ⅎ𝑦𝐴 | |
| 2 | nfcv 2339 | . 2 ⊢ Ⅎ𝑥𝐵 | |
| 3 | 1, 2 | ralcomf 2658 | 1 ⊢ (∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐵 𝜑 ↔ ∀𝑦 ∈ 𝐵 ∀𝑥 ∈ 𝐴 𝜑) |
| Colors of variables: wff set class |
| Syntax hints: ↔ wb 105 ∀wral 2475 |
| 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 1461 ax-7 1462 ax-gen 1463 ax-ie1 1507 ax-ie2 1508 ax-8 1518 ax-10 1519 ax-11 1520 ax-i12 1521 ax-bndl 1523 ax-4 1524 ax-17 1540 ax-i9 1544 ax-ial 1548 ax-i5r 1549 ax-ext 2178 |
| This theorem depends on definitions: df-bi 117 df-nf 1475 df-sb 1777 df-cleq 2189 df-clel 2192 df-nfc 2328 df-ral 2480 |
| This theorem is referenced by: ralrot3 2662 ralcom4 2785 ssint 3891 issod 4355 reusv3 4496 cnvpom 5213 cnvsom 5214 fununi 5327 isocnv2 5862 dfsmo2 6354 ixpiinm 6792 rexfiuz 11173 isnsg2 13411 opprsubrngg 13845 opprdomnbg 13908 rmodislmodlem 13984 rmodislmod 13985 tgss2 14423 cnmptcom 14642 |
| Copyright terms: Public domain | W3C validator |