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Mirrors > Home > ILE Home > Th. List > ralunb | GIF version |
Description: Restricted quantification over a union. (Contributed by Scott Fenton, 12-Apr-2011.) (Proof shortened by Andrew Salmon, 29-Jun-2011.) |
Ref | Expression |
---|---|
ralunb | ⊢ (∀𝑥 ∈ (𝐴 ∪ 𝐵)𝜑 ↔ (∀𝑥 ∈ 𝐴 𝜑 ∧ ∀𝑥 ∈ 𝐵 𝜑)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | elun 3263 | . . . . . 6 ⊢ (𝑥 ∈ (𝐴 ∪ 𝐵) ↔ (𝑥 ∈ 𝐴 ∨ 𝑥 ∈ 𝐵)) | |
2 | 1 | imbi1i 237 | . . . . 5 ⊢ ((𝑥 ∈ (𝐴 ∪ 𝐵) → 𝜑) ↔ ((𝑥 ∈ 𝐴 ∨ 𝑥 ∈ 𝐵) → 𝜑)) |
3 | jaob 700 | . . . . 5 ⊢ (((𝑥 ∈ 𝐴 ∨ 𝑥 ∈ 𝐵) → 𝜑) ↔ ((𝑥 ∈ 𝐴 → 𝜑) ∧ (𝑥 ∈ 𝐵 → 𝜑))) | |
4 | 2, 3 | bitri 183 | . . . 4 ⊢ ((𝑥 ∈ (𝐴 ∪ 𝐵) → 𝜑) ↔ ((𝑥 ∈ 𝐴 → 𝜑) ∧ (𝑥 ∈ 𝐵 → 𝜑))) |
5 | 4 | albii 1458 | . . 3 ⊢ (∀𝑥(𝑥 ∈ (𝐴 ∪ 𝐵) → 𝜑) ↔ ∀𝑥((𝑥 ∈ 𝐴 → 𝜑) ∧ (𝑥 ∈ 𝐵 → 𝜑))) |
6 | 19.26 1469 | . . 3 ⊢ (∀𝑥((𝑥 ∈ 𝐴 → 𝜑) ∧ (𝑥 ∈ 𝐵 → 𝜑)) ↔ (∀𝑥(𝑥 ∈ 𝐴 → 𝜑) ∧ ∀𝑥(𝑥 ∈ 𝐵 → 𝜑))) | |
7 | 5, 6 | bitri 183 | . 2 ⊢ (∀𝑥(𝑥 ∈ (𝐴 ∪ 𝐵) → 𝜑) ↔ (∀𝑥(𝑥 ∈ 𝐴 → 𝜑) ∧ ∀𝑥(𝑥 ∈ 𝐵 → 𝜑))) |
8 | df-ral 2449 | . 2 ⊢ (∀𝑥 ∈ (𝐴 ∪ 𝐵)𝜑 ↔ ∀𝑥(𝑥 ∈ (𝐴 ∪ 𝐵) → 𝜑)) | |
9 | df-ral 2449 | . . 3 ⊢ (∀𝑥 ∈ 𝐴 𝜑 ↔ ∀𝑥(𝑥 ∈ 𝐴 → 𝜑)) | |
10 | df-ral 2449 | . . 3 ⊢ (∀𝑥 ∈ 𝐵 𝜑 ↔ ∀𝑥(𝑥 ∈ 𝐵 → 𝜑)) | |
11 | 9, 10 | anbi12i 456 | . 2 ⊢ ((∀𝑥 ∈ 𝐴 𝜑 ∧ ∀𝑥 ∈ 𝐵 𝜑) ↔ (∀𝑥(𝑥 ∈ 𝐴 → 𝜑) ∧ ∀𝑥(𝑥 ∈ 𝐵 → 𝜑))) |
12 | 7, 8, 11 | 3bitr4i 211 | 1 ⊢ (∀𝑥 ∈ (𝐴 ∪ 𝐵)𝜑 ↔ (∀𝑥 ∈ 𝐴 𝜑 ∧ ∀𝑥 ∈ 𝐵 𝜑)) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∧ wa 103 ↔ wb 104 ∨ wo 698 ∀wal 1341 ∈ wcel 2136 ∀wral 2444 ∪ cun 3114 |
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 699 ax-5 1435 ax-7 1436 ax-gen 1437 ax-ie1 1481 ax-ie2 1482 ax-8 1492 ax-10 1493 ax-11 1494 ax-i12 1495 ax-bndl 1497 ax-4 1498 ax-17 1514 ax-i9 1518 ax-ial 1522 ax-i5r 1523 ax-ext 2147 |
This theorem depends on definitions: df-bi 116 df-tru 1346 df-nf 1449 df-sb 1751 df-clab 2152 df-cleq 2158 df-clel 2161 df-nfc 2297 df-ral 2449 df-v 2728 df-un 3120 |
This theorem is referenced by: ralun 3304 ralprg 3627 raltpg 3629 ralunsn 3777 dcfi 6946 rexfiuz 10931 modfsummodlemstep 11398 modfsummod 11399 zsupcllemstep 11878 prmind2 12052 2sqlem10 13601 nninfsellemdc 13890 nninfsellemsuc 13892 |
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