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Mirrors > Home > MPE Home > Th. List > ioopos | Structured version Visualization version GIF version |
Description: The set of positive reals expressed as an open interval. (Contributed by NM, 7-May-2007.) |
Ref | Expression |
---|---|
ioopos | ⊢ (0(,)+∞) = {𝑥 ∈ ℝ ∣ 0 < 𝑥} |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 0xr 10287 | . . 3 ⊢ 0 ∈ ℝ* | |
2 | pnfxr 10293 | . . 3 ⊢ +∞ ∈ ℝ* | |
3 | iooval2 12412 | . . 3 ⊢ ((0 ∈ ℝ* ∧ +∞ ∈ ℝ*) → (0(,)+∞) = {𝑥 ∈ ℝ ∣ (0 < 𝑥 ∧ 𝑥 < +∞)}) | |
4 | 1, 2, 3 | mp2an 664 | . 2 ⊢ (0(,)+∞) = {𝑥 ∈ ℝ ∣ (0 < 𝑥 ∧ 𝑥 < +∞)} |
5 | ltpnf 12158 | . . . 4 ⊢ (𝑥 ∈ ℝ → 𝑥 < +∞) | |
6 | 5 | biantrud 515 | . . 3 ⊢ (𝑥 ∈ ℝ → (0 < 𝑥 ↔ (0 < 𝑥 ∧ 𝑥 < +∞))) |
7 | 6 | rabbiia 3333 | . 2 ⊢ {𝑥 ∈ ℝ ∣ 0 < 𝑥} = {𝑥 ∈ ℝ ∣ (0 < 𝑥 ∧ 𝑥 < +∞)} |
8 | 4, 7 | eqtr4i 2795 | 1 ⊢ (0(,)+∞) = {𝑥 ∈ ℝ ∣ 0 < 𝑥} |
Colors of variables: wff setvar class |
Syntax hints: ∧ wa 382 = wceq 1630 ∈ wcel 2144 {crab 3064 class class class wbr 4784 (class class class)co 6792 ℝcr 10136 0cc0 10137 +∞cpnf 10272 ℝ*cxr 10274 < clt 10275 (,)cioo 12379 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1869 ax-4 1884 ax-5 1990 ax-6 2056 ax-7 2092 ax-8 2146 ax-9 2153 ax-10 2173 ax-11 2189 ax-12 2202 ax-13 2407 ax-ext 2750 ax-sep 4912 ax-nul 4920 ax-pow 4971 ax-pr 5034 ax-un 7095 ax-cnex 10193 ax-resscn 10194 ax-1cn 10195 ax-icn 10196 ax-addcl 10197 ax-addrcl 10198 ax-mulcl 10199 ax-mulrcl 10200 ax-i2m1 10205 ax-1ne0 10206 ax-rnegex 10208 ax-rrecex 10209 ax-cnre 10210 ax-pre-lttri 10211 ax-pre-lttrn 10212 |
This theorem depends on definitions: df-bi 197 df-an 383 df-or 827 df-3or 1071 df-3an 1072 df-tru 1633 df-ex 1852 df-nf 1857 df-sb 2049 df-eu 2621 df-mo 2622 df-clab 2757 df-cleq 2763 df-clel 2766 df-nfc 2901 df-ne 2943 df-nel 3046 df-ral 3065 df-rex 3066 df-rab 3069 df-v 3351 df-sbc 3586 df-csb 3681 df-dif 3724 df-un 3726 df-in 3728 df-ss 3735 df-nul 4062 df-if 4224 df-pw 4297 df-sn 4315 df-pr 4317 df-op 4321 df-uni 4573 df-iun 4654 df-br 4785 df-opab 4845 df-mpt 4862 df-id 5157 df-po 5170 df-so 5171 df-xp 5255 df-rel 5256 df-cnv 5257 df-co 5258 df-dm 5259 df-rn 5260 df-res 5261 df-ima 5262 df-iota 5994 df-fun 6033 df-fn 6034 df-f 6035 df-f1 6036 df-fo 6037 df-f1o 6038 df-fv 6039 df-ov 6795 df-oprab 6796 df-mpt2 6797 df-1st 7314 df-2nd 7315 df-er 7895 df-en 8109 df-dom 8110 df-sdom 8111 df-pnf 10277 df-mnf 10278 df-xr 10279 df-ltxr 10280 df-le 10281 df-ioo 12383 |
This theorem is referenced by: ioorp 12455 repos 12475 |
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