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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 11272 | . . 3 ⊢ -∞ ∈ ℝ* | |
| 2 | pnfxr 11269 | . . 3 ⊢ +∞ ∈ ℝ* | |
| 3 | iooval2 13411 | . . 3 ⊢ ((-∞ ∈ ℝ* ∧ +∞ ∈ ℝ*) → (-∞(,)+∞) = {𝑥 ∈ ℝ ∣ (-∞ < 𝑥 ∧ 𝑥 < +∞)}) | |
| 4 | 1, 2, 3 | mp2an 704 | . 2 ⊢ (-∞(,)+∞) = {𝑥 ∈ ℝ ∣ (-∞ < 𝑥 ∧ 𝑥 < +∞)} |
| 5 | rabid2 3448 | . . 3 ⊢ (ℝ = {𝑥 ∈ ℝ ∣ (-∞ < 𝑥 ∧ 𝑥 < +∞)} ↔ ∀𝑥 ∈ ℝ (-∞ < 𝑥 ∧ 𝑥 < +∞)) | |
| 6 | mnflt 13154 | . . . 4 ⊢ (𝑥 ∈ ℝ → -∞ < 𝑥) | |
| 7 | ltpnf 13151 | . . . 4 ⊢ (𝑥 ∈ ℝ → 𝑥 < +∞) | |
| 8 | 6, 7 | jca 520 | . . 3 ⊢ (𝑥 ∈ ℝ → (-∞ < 𝑥 ∧ 𝑥 < +∞)) |
| 9 | 5, 8 | mprgbir 3085 | . 2 ⊢ ℝ = {𝑥 ∈ ℝ ∣ (-∞ < 𝑥 ∧ 𝑥 < +∞)} |
| 10 | 4, 9 | eqtr4i 2788 | 1 ⊢ (-∞(,)+∞) = ℝ |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∧ wa 400 = wceq 1569 ∈ wcel 2142 {crab 3415 class class class wbr 5108 (class class class)co 7412 ℝcr 11105 +∞cpnf 11246 -∞cmnf 11247 ℝ*cxr 11248 < clt 11249 (,)cioo 13378 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1824 ax-4 1838 ax-5 1939 ax-6 1996 ax-7 2037 ax-8 2144 ax-9 2152 ax-10 2175 ax-11 2191 ax-12 2212 ax-ext 2734 ax-sep 5256 ax-nul 5268 ax-pow 5335 ax-pr 5403 ax-un 7734 ax-cnex 11162 ax-resscn 11163 ax-pre-lttri 11180 ax-pre-lttrn 11181 |
| This proof depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1103 df-3an 1104 df-tru 1572 df-fal 1582 df-ex 1809 df-nf 1813 df-sb 2096 df-mo 2566 df-eu 2596 df-clab 2741 df-cleq 2754 df-clel 2837 df-nfc 2911 df-ne 2958 df-nel 3064 df-ral 3079 df-rex 3089 df-rab 3416 df-v 3456 df-sbc 3744 df-csb 3853 df-dif 3907 df-un 3909 df-in 3911 df-ss 3921 df-nul 4286 df-if 4487 df-pw 4563 df-sn 4589 df-pr 4591 df-op 4595 df-uni 4872 df-iun 4957 df-br 5109 df-opab 5173 df-mpt 5192 df-id 5555 df-po 5568 df-so 5569 df-xp 5666 df-rel 5667 df-cnv 5668 df-co 5669 df-dm 5670 df-rn 5671 df-res 5672 df-ima 5673 df-iota 6492 df-fun 6538 df-fn 6539 df-f 6540 df-f1 6541 df-fo 6542 df-f1o 6543 df-fv 6544 df-ov 7415 df-oprab 7416 df-mpo 7417 df-1st 7984 df-2nd 7985 df-er 8692 df-en 8942 df-dom 8943 df-sdom 8944 df-pnf 11251 df-mnf 11252 df-xr 11253 df-ltxr 11254 df-le 11255 df-ioo 13382 |
| This theorem is used by: unirnioo 13482 resup 13907 reordt 23386 icopnfcld 24935 iocmnfcld 24936 blssioo 24963 reconnlem1 24995 ioombl1 25732 ioombl 25735 mbfdm 25796 ismbf 25798 ismbf2d 25810 ismbf3d 25824 tpr2rico 34311 esumcvgsum 34487 itgexpif 35002 retopsconn 35749 asindmre 38382 itgsubsticclem 46717 |
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