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| Mirrors > Home > MPE Home > Th. List > ioomax | Structured version Visualization version GIF version | ||
| Description: The open interval from minus to plus infinity. (Contributed by NM, 6-Feb-2007.) |
| Ref | Expression |
|---|---|
| ioomax | ⊢ (-∞(,)+∞) = ℝ |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | mnfxr 11284 | . . 3 ⊢ -∞ ∈ ℝ* | |
| 2 | pnfxr 11281 | . . 3 ⊢ +∞ ∈ ℝ* | |
| 3 | iooval2 13423 | . . 3 ⊢ ((-∞ ∈ ℝ* ∧ +∞ ∈ ℝ*) → (-∞(,)+∞) = {𝑥 ∈ ℝ ∣ (-∞ < 𝑥 ∧ 𝑥 < +∞)}) | |
| 4 | 1, 2, 3 | mp2an 705 | . 2 ⊢ (-∞(,)+∞) = {𝑥 ∈ ℝ ∣ (-∞ < 𝑥 ∧ 𝑥 < +∞)} |
| 5 | rabid2 3452 | . . 3 ⊢ (ℝ = {𝑥 ∈ ℝ ∣ (-∞ < 𝑥 ∧ 𝑥 < +∞)} ↔ ∀𝑥 ∈ ℝ (-∞ < 𝑥 ∧ 𝑥 < +∞)) | |
| 6 | mnflt 13166 | . . . 4 ⊢ (𝑥 ∈ ℝ → -∞ < 𝑥) | |
| 7 | ltpnf 13163 | . . . 4 ⊢ (𝑥 ∈ ℝ → 𝑥 < +∞) | |
| 8 | 6, 7 | jca 521 | . . 3 ⊢ (𝑥 ∈ ℝ → (-∞ < 𝑥 ∧ 𝑥 < +∞)) |
| 9 | 5, 8 | mprgbir 3089 | . 2 ⊢ ℝ = {𝑥 ∈ ℝ ∣ (-∞ < 𝑥 ∧ 𝑥 < +∞)} |
| 10 | 4, 9 | eqtr4i 2792 | 1 ⊢ (-∞(,)+∞) = ℝ |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∧ wa 401 = wceq 1570 ∈ wcel 2146 {crab 3419 class class class wbr 5114 (class class class)co 7423 ℝcr 11117 +∞cpnf 11258 -∞cmnf 11259 ℝ*cxr 11260 < clt 11261 (,)cioo 13390 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2148 ax-9 2156 ax-10 2179 ax-11 2195 ax-12 2216 ax-ext 2738 ax-sep 5262 ax-nul 5274 ax-pow 5341 ax-pr 5409 ax-un 7745 ax-cnex 11174 ax-resscn 11175 ax-pre-lttri 11192 ax-pre-lttrn 11193 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2570 df-eu 2600 df-clab 2745 df-cleq 2758 df-clel 2841 df-nfc 2915 df-ne 2962 df-nel 3068 df-ral 3083 df-rex 3093 df-rab 3420 df-v 3460 df-sbc 3748 df-csb 3857 df-dif 3911 df-un 3913 df-in 3915 df-ss 3925 df-nul 4290 df-if 4493 df-pw 4569 df-sn 4595 df-pr 4597 df-op 4601 df-uni 4878 df-iun 4963 df-br 5115 df-opab 5179 df-mpt 5198 df-id 5561 df-po 5574 df-so 5575 df-xp 5672 df-rel 5673 df-cnv 5674 df-co 5675 df-dm 5676 df-rn 5677 df-res 5678 df-ima 5679 df-iota 6499 df-fun 6545 df-fn 6546 df-f 6547 df-f1 6548 df-fo 6549 df-f1o 6550 df-fv 6551 df-ov 7426 df-oprab 7427 df-mpo 7428 df-1st 7995 df-2nd 7996 df-er 8703 df-en 8953 df-dom 8954 df-sdom 8955 df-pnf 11263 df-mnf 11264 df-xr 11265 df-ltxr 11266 df-le 11267 df-ioo 13394 |
| This theorem is used by: unirnioo 13494 resup 13920 reordt 23412 icopnfcld 24961 iocmnfcld 24962 blssioo 24989 reconnlem1 25021 ioombl1 25758 ioombl 25761 mbfdm 25822 ismbf 25824 ismbf2d 25836 ismbf3d 25850 tpr2rico 34333 esumcvgsum 34509 itgexpif 35025 retopsconn 35762 asindmre 38395 itgsubsticclem 46730 |
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