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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 11396 | . . 3 ⊢ -∞ ∈ ℝ* | |
| 2 | pnfxr 11393 | . . 3 ⊢ +∞ ∈ ℝ* | |
| 3 | iooval2 13539 | . . 3 ⊢ ((-∞ ∈ ℝ* ∧ +∞ ∈ ℝ*) → (-∞(,)+∞) = {𝑥 ∈ ℝ ∣ (-∞ < 𝑥 ∧ 𝑥 < +∞)}) | |
| 4 | 1, 2, 3 | mp2an 705 | . 2 ⊢ (-∞(,)+∞) = {𝑥 ∈ ℝ ∣ (-∞ < 𝑥 ∧ 𝑥 < +∞)} |
| 5 | rabid2 3448 | . . 3 ⊢ (ℝ = {𝑥 ∈ ℝ ∣ (-∞ < 𝑥 ∧ 𝑥 < +∞)} ↔ ∀𝑥 ∈ ℝ (-∞ < 𝑥 ∧ 𝑥 < +∞)) | |
| 6 | mnflt 13282 | . . . 4 ⊢ (𝑥 ∈ ℝ → -∞ < 𝑥) | |
| 7 | ltpnf 13279 | . . . 4 ⊢ (𝑥 ∈ ℝ → 𝑥 < +∞) | |
| 8 | 6, 7 | jca 521 | . . 3 ⊢ (𝑥 ∈ ℝ → (-∞ < 𝑥 ∧ 𝑥 < +∞)) |
| 9 | 5, 8 | mprgbir 3087 | . 2 ⊢ ℝ = {𝑥 ∈ ℝ ∣ (-∞ < 𝑥 ∧ 𝑥 < +∞)} |
| 10 | 4, 9 | eqtr4i 2789 | 1 ⊢ (-∞(,)+∞) = ℝ |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∧ wa 401 = wceq 1570 ∈ wcel 2147 {crab 3416 class class class wbr 5106 (class class class)co 7446 ℝcr 11229 +∞cpnf 11370 -∞cmnf 11371 ℝ*cxr 11372 < clt 11373 (,)cioo 13506 |
| 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 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-10 2180 ax-11 2197 ax-12 2216 ax-ext 2735 ax-sep 5253 ax-nul 5264 ax-pow 5332 ax-pr 5396 ax-un 7778 ax-cnex 11286 ax-resscn 11287 ax-pre-lttri 11304 ax-pre-lttrn 11305 |
| 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 2102 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ne 2960 df-nel 3066 df-ral 3081 df-rex 3091 df-rab 3417 df-v 3456 df-sbc 3743 df-csb 3852 df-ss 3901 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-pw 4562 df-sn 4589 df-pr 4591 df-op 4839 df-uni 4871 df-iun 4956 df-br 5107 df-opab 5172 df-mpt 5191 df-id 5551 df-po 5564 df-so 5565 df-xp 5662 df-rel 5663 df-cnv 5664 df-co 5665 df-dm 5666 df-rn 5667 df-res 5668 df-ima 5669 df-iota 6515 df-fun 6563 df-fn 6564 df-f 6565 df-f1 6566 df-fo 6567 df-f1o 6568 df-fv 6569 df-ov 7449 df-oprab 7450 df-mpo 7451 df-1st 8028 df-2nd 8029 df-er 8748 df-en 9005 df-dom 9006 df-sdom 9007 df-pnf 11375 df-mnf 11376 df-xr 11377 df-ltxr 11378 df-le 11379 df-ioo 13510 |
| This theorem is used by: unirnioo 13610 resup 14037 reordt 23569 icopnfcld 25119 iocmnfcld 25120 blssioo 25147 reconnlem1 25179 ioombl1 25916 ioombl 25919 mbfdm 25980 ismbf 25982 ismbf2d 25994 ismbf3d 26008 tpr2rico 34627 esumcvgsum 34803 itgexpif 35318 retopsconn 36194 asindmre 38826 itgsubsticclem 47200 |
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