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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 9777 | . . . 4 ⊢ (𝑥 ∈ ℝ+ ↔ (𝑥 ∈ ℝ ∧ 0 < 𝑥)) | |
| 2 | 1 | imbi1i 238 | . . 3 ⊢ ((𝑥 ∈ ℝ+ → 𝜑) ↔ ((𝑥 ∈ ℝ ∧ 0 < 𝑥) → 𝜑)) |
| 3 | impexp 263 | . . 3 ⊢ (((𝑥 ∈ ℝ ∧ 0 < 𝑥) → 𝜑) ↔ (𝑥 ∈ ℝ → (0 < 𝑥 → 𝜑))) | |
| 4 | 2, 3 | bitri 184 | . 2 ⊢ ((𝑥 ∈ ℝ+ → 𝜑) ↔ (𝑥 ∈ ℝ → (0 < 𝑥 → 𝜑))) |
| 5 | 4 | ralbii2 2516 | 1 ⊢ (∀𝑥 ∈ ℝ+ 𝜑 ↔ ∀𝑥 ∈ ℝ (0 < 𝑥 → 𝜑)) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∧ wa 104 ↔ wb 105 ∈ wcel 2176 ∀wral 2484 class class class wbr 4044 ℝcr 7924 0cc0 7925 < clt 8107 ℝ+crp 9775 |
| 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 711 ax-5 1470 ax-7 1471 ax-gen 1472 ax-ie1 1516 ax-ie2 1517 ax-8 1527 ax-10 1528 ax-11 1529 ax-i12 1530 ax-bndl 1532 ax-4 1533 ax-17 1549 ax-i9 1553 ax-ial 1557 ax-i5r 1558 ax-ext 2187 |
| This theorem depends on definitions: df-bi 117 df-3an 983 df-tru 1376 df-nf 1484 df-sb 1786 df-clab 2192 df-cleq 2198 df-clel 2201 df-nfc 2337 df-ral 2489 df-rab 2493 df-v 2774 df-un 3170 df-sn 3639 df-pr 3640 df-op 3642 df-br 4045 df-rp 9776 |
| This theorem is referenced by: caucvgre 11292 |
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