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| Mirrors > Home > MPE Home > Th. List > elioopnf | Structured version Visualization version GIF version | ||
| Description: Membership in an unbounded interval of extended reals. (Contributed by Mario Carneiro, 18-Jun-2014.) |
| Ref | Expression |
|---|---|
| elioopnf | ⊢ (𝐴 ∈ ℝ* → (𝐵 ∈ (𝐴(,)+∞) ↔ (𝐵 ∈ ℝ ∧ 𝐴 < 𝐵))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | pnfxr 11363 | . . 3 ⊢ +∞ ∈ ℝ* | |
| 2 | elioo2 13517 | . . 3 ⊢ ((𝐴 ∈ ℝ* ∧ +∞ ∈ ℝ*) → (𝐵 ∈ (𝐴(,)+∞) ↔ (𝐵 ∈ ℝ ∧ 𝐴 < 𝐵 ∧ 𝐵 < +∞))) | |
| 3 | 1, 2 | mpan2 704 | . 2 ⊢ (𝐴 ∈ ℝ* → (𝐵 ∈ (𝐴(,)+∞) ↔ (𝐵 ∈ ℝ ∧ 𝐴 < 𝐵 ∧ 𝐵 < +∞))) |
| 4 | df-3an 1105 | . . 3 ⊢ ((𝐵 ∈ ℝ ∧ 𝐴 < 𝐵 ∧ 𝐵 < +∞) ↔ ((𝐵 ∈ ℝ ∧ 𝐴 < 𝐵) ∧ 𝐵 < +∞)) | |
| 5 | ltpnf 13249 | . . . . 5 ⊢ (𝐵 ∈ ℝ → 𝐵 < +∞) | |
| 6 | 5 | adantr 486 | . . . 4 ⊢ ((𝐵 ∈ ℝ ∧ 𝐴 < 𝐵) → 𝐵 < +∞) |
| 7 | 6 | pm4.71i 569 | . . 3 ⊢ ((𝐵 ∈ ℝ ∧ 𝐴 < 𝐵) ↔ ((𝐵 ∈ ℝ ∧ 𝐴 < 𝐵) ∧ 𝐵 < +∞)) |
| 8 | 4, 7 | bitr4i 281 | . 2 ⊢ ((𝐵 ∈ ℝ ∧ 𝐴 < 𝐵 ∧ 𝐵 < +∞) ↔ (𝐵 ∈ ℝ ∧ 𝐴 < 𝐵)) |
| 9 | 3, 8 | bitrdi 290 | 1 ⊢ (𝐴 ∈ ℝ* → (𝐵 ∈ (𝐴(,)+∞) ↔ (𝐵 ∈ ℝ ∧ 𝐴 < 𝐵))) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 ∧ wa 401 ∧ w3a 1103 ∈ wcel 2145 class class class wbr 5103 (class class class)co 7420 ℝcr 11199 +∞cpnf 11340 ℝ*cxr 11342 < clt 11343 (,)cioo 13476 |
| 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 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2733 ax-sep 5249 ax-nul 5260 ax-pow 5327 ax-pr 5391 ax-un 7751 ax-cnex 11256 ax-resscn 11257 ax-pre-lttri 11274 ax-pre-lttrn 11275 |
| 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 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-nel 3063 df-ral 3078 df-rex 3088 df-rab 3414 df-v 3453 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-iun 4953 df-br 5104 df-opab 5168 df-mpt 5187 df-id 5546 df-po 5559 df-so 5560 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 df-iota 6494 df-fun 6540 df-fn 6541 df-f 6542 df-f1 6543 df-fo 6544 df-f1o 6545 df-fv 6546 df-ov 7423 df-oprab 7424 df-mpo 7425 df-1st 8001 df-2nd 8002 df-er 8717 df-en 8974 df-dom 8975 df-sdom 8976 df-pnf 11345 df-mnf 11346 df-xr 11347 df-ltxr 11348 df-le 11349 df-ioo 13480 |
| This theorem is used by: mbfmulc2lem 25968 mbfposr 25973 ismbf3d 25975 mbfaddlem 25981 mbfsup 25985 itg2gt0 26081 itg2cnlem1 26082 itg2cnlem2 26083 lhop2 26335 dvfsumlem2 26347 dvfsumlem3 26348 dvfsumrlimge0 26350 dvfsumrlim 26351 dvfsumrlim2 26352 pntpbnd1a 27912 pntpbnd2 27914 pntibndlem2 27918 pntibndlem3 27919 pntlemi 27931 pntlemo 27934 relowlssretop 38286 itg2addnclem2 38590 iblabsnclem 38601 ftc1anclem1 38611 ftc1anclem6 38616 rfcnpre1 46035 regt1loggt0 49647 rege1logbrege0 49669 rege1logbzge0 49670 io1ii 50028 |
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