elioopnf - Metamath Proof Explorer

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Theorem elioopnf 13460

Description: Membership in an unbounded interval of extended reals. (Contributed by Mario Carneiro, 18-Jun-2014.)

**Assertion**
Ref	Expression
elioopnf	⊢ (𝐴 ∈ ℝ^* → (𝐵 ∈ (𝐴(,)+∞) ↔ (𝐵 ∈ ℝ ∧ 𝐴 < 𝐵)))

**Proof of Theorem elioopnf**
Step	Hyp	Ref	Expression
1		pnfxr 11289	. . 3 ⊢ +∞ ∈ ℝ^*
2		elioo2 13403	. . 3 ⊢ ((𝐴 ∈ ℝ^* ∧ +∞ ∈ ℝ^*) → (𝐵 ∈ (𝐴(,)+∞) ↔ (𝐵 ∈ ℝ ∧ 𝐴 < 𝐵 ∧ 𝐵 < +∞)))
3	1, 2	mpan2 691	. 2 ⊢ (𝐴 ∈ ℝ^* → (𝐵 ∈ (𝐴(,)+∞) ↔ (𝐵 ∈ ℝ ∧ 𝐴 < 𝐵 ∧ 𝐵 < +∞)))
4		df-3an 1088	. . 3 ⊢ ((𝐵 ∈ ℝ ∧ 𝐴 < 𝐵 ∧ 𝐵 < +∞) ↔ ((𝐵 ∈ ℝ ∧ 𝐴 < 𝐵) ∧ 𝐵 < +∞))
5		ltpnf 13136	. . . . 5 ⊢ (𝐵 ∈ ℝ → 𝐵 < +∞)
6	5	adantr 480	. . . 4 ⊢ ((𝐵 ∈ ℝ ∧ 𝐴 < 𝐵) → 𝐵 < +∞)
7	6	pm4.71i 559	. . 3 ⊢ ((𝐵 ∈ ℝ ∧ 𝐴 < 𝐵) ↔ ((𝐵 ∈ ℝ ∧ 𝐴 < 𝐵) ∧ 𝐵 < +∞))
8	4, 7	bitr4i 278	. 2 ⊢ ((𝐵 ∈ ℝ ∧ 𝐴 < 𝐵 ∧ 𝐵 < +∞) ↔ (𝐵 ∈ ℝ ∧ 𝐴 < 𝐵))
9	3, 8	bitrdi 287	1 ⊢ (𝐴 ∈ ℝ^* → (𝐵 ∈ (𝐴(,)+∞) ↔ (𝐵 ∈ ℝ ∧ 𝐴 < 𝐵)))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 206 ∧ wa 395 ∧ w3a 1086 ∈ wcel 2108 class class class wbr 5119 (class class class)co 7405 ℝcr 11128 +∞cpnf 11266 ℝ^*cxr 11268 < clt 11269 (,)cioo 13362

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2007 ax-8 2110 ax-9 2118 ax-10 2141 ax-11 2157 ax-12 2177 ax-ext 2707 ax-sep 5266 ax-nul 5276 ax-pow 5335 ax-pr 5402 ax-un 7729 ax-cnex 11185 ax-resscn 11186 ax-pre-lttri 11203 ax-pre-lttrn 11204

This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2065 df-mo 2539 df-eu 2568 df-clab 2714 df-cleq 2727 df-clel 2809 df-nfc 2885 df-ne 2933 df-nel 3037 df-ral 3052 df-rex 3061 df-rab 3416 df-v 3461 df-sbc 3766 df-csb 3875 df-dif 3929 df-un 3931 df-in 3933 df-ss 3943 df-nul 4309 df-if 4501 df-pw 4577 df-sn 4602 df-pr 4604 df-op 4608 df-uni 4884 df-iun 4969 df-br 5120 df-opab 5182 df-mpt 5202 df-id 5548 df-po 5561 df-so 5562 df-xp 5660 df-rel 5661 df-cnv 5662 df-co 5663 df-dm 5664 df-rn 5665 df-res 5666 df-ima 5667 df-iota 6484 df-fun 6533 df-fn 6534 df-f 6535 df-f1 6536 df-fo 6537 df-f1o 6538 df-fv 6539 df-ov 7408 df-oprab 7409 df-mpo 7410 df-1st 7988 df-2nd 7989 df-er 8719 df-en 8960 df-dom 8961 df-sdom 8962 df-pnf 11271 df-mnf 11272 df-xr 11273 df-ltxr 11274 df-le 11275 df-ioo 13366

This theorem is referenced by: mbfmulc2lem 25600 mbfposr 25605 ismbf3d 25607 mbfaddlem 25613 mbfsup 25617 itg2gt0 25713 itg2cnlem1 25714 itg2cnlem2 25715 lhop2 25972 dvfsumlem2 25985 dvfsumlem2OLD 25986 dvfsumlem3 25987 dvfsumrlimge0 25989 dvfsumrlim 25990 dvfsumrlim2 25991 pntpbnd1a 27548 pntpbnd2 27550 pntibndlem2 27554 pntibndlem3 27555 pntlemi 27567 pntlemo 27570 relowlssretop 37381 itg2addnclem2 37696 iblabsnclem 37707 ftc1anclem1 37717 ftc1anclem6 37722 rfcnpre1 45043 regt1loggt0 48516 rege1logbrege0 48538 rege1logbzge0 48539 io1ii 48895

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