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Mirrors > Home > ILE Home > Th. List > ralrp | GIF version |
Description: Quantification over positive reals. (Contributed by NM, 12-Feb-2008.) |
Ref | Expression |
---|---|
ralrp | ⊢ (∀𝑥 ∈ ℝ+ 𝜑 ↔ ∀𝑥 ∈ ℝ (0 < 𝑥 → 𝜑)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | elrp 9591 | . . . 4 ⊢ (𝑥 ∈ ℝ+ ↔ (𝑥 ∈ ℝ ∧ 0 < 𝑥)) | |
2 | 1 | imbi1i 237 | . . 3 ⊢ ((𝑥 ∈ ℝ+ → 𝜑) ↔ ((𝑥 ∈ ℝ ∧ 0 < 𝑥) → 𝜑)) |
3 | impexp 261 | . . 3 ⊢ (((𝑥 ∈ ℝ ∧ 0 < 𝑥) → 𝜑) ↔ (𝑥 ∈ ℝ → (0 < 𝑥 → 𝜑))) | |
4 | 2, 3 | bitri 183 | . 2 ⊢ ((𝑥 ∈ ℝ+ → 𝜑) ↔ (𝑥 ∈ ℝ → (0 < 𝑥 → 𝜑))) |
5 | 4 | ralbii2 2476 | 1 ⊢ (∀𝑥 ∈ ℝ+ 𝜑 ↔ ∀𝑥 ∈ ℝ (0 < 𝑥 → 𝜑)) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∧ wa 103 ↔ wb 104 ∈ wcel 2136 ∀wral 2444 class class class wbr 3982 ℝcr 7752 0cc0 7753 < clt 7933 ℝ+crp 9589 |
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-3an 970 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-rab 2453 df-v 2728 df-un 3120 df-sn 3582 df-pr 3583 df-op 3585 df-br 3983 df-rp 9590 |
This theorem is referenced by: caucvgre 10923 |
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