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| Mirrors > Home > MPE Home > Th. List > ralrp | Structured version Visualization version 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 12902 | . . . 4 ⊢ (𝑥 ∈ ℝ+ ↔ (𝑥 ∈ ℝ ∧ 0 < 𝑥)) | |
| 2 | 1 | imbi1i 349 | . . 3 ⊢ ((𝑥 ∈ ℝ+ → 𝜑) ↔ ((𝑥 ∈ ℝ ∧ 0 < 𝑥) → 𝜑)) |
| 3 | impexp 450 | . . 3 ⊢ (((𝑥 ∈ ℝ ∧ 0 < 𝑥) → 𝜑) ↔ (𝑥 ∈ ℝ → (0 < 𝑥 → 𝜑))) | |
| 4 | 2, 3 | bitri 275 | . 2 ⊢ ((𝑥 ∈ ℝ+ → 𝜑) ↔ (𝑥 ∈ ℝ → (0 < 𝑥 → 𝜑))) |
| 5 | 4 | ralbii2 3076 | 1 ⊢ (∀𝑥 ∈ ℝ+ 𝜑 ↔ ∀𝑥 ∈ ℝ (0 < 𝑥 → 𝜑)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 206 ∧ wa 395 ∈ wcel 2113 ∀wral 3049 class class class wbr 5095 ℝcr 11015 0cc0 11016 < clt 11156 ℝ+crp 12900 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-ext 2705 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-sb 2068 df-clab 2712 df-cleq 2725 df-clel 2808 df-ral 3050 df-rab 3398 df-v 3440 df-dif 3902 df-un 3904 df-ss 3916 df-nul 4285 df-if 4477 df-sn 4578 df-pr 4580 df-op 4584 df-br 5096 df-rp 12901 |
| This theorem is referenced by: (None) |
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