elioopnf - Metamath Proof Explorer

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Theorem elioopnf 13404

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 11228	. . 3 ⊢ +∞ ∈ ℝ^*
2		elioo2 13347	. . 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 13080	. . . . 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 2109 class class class wbr 5107 (class class class)co 7387 ℝcr 11067 +∞cpnf 11205 ℝ^*cxr 11207 < clt 11208 (,)cioo 13306

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 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-11 2158 ax-12 2178 ax-ext 2701 ax-sep 5251 ax-nul 5261 ax-pow 5320 ax-pr 5387 ax-un 7711 ax-cnex 11124 ax-resscn 11125 ax-pre-lttri 11142 ax-pre-lttrn 11143

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 2066 df-mo 2533 df-eu 2562 df-clab 2708 df-cleq 2721 df-clel 2803 df-nfc 2878 df-ne 2926 df-nel 3030 df-ral 3045 df-rex 3054 df-rab 3406 df-v 3449 df-sbc 3754 df-csb 3863 df-dif 3917 df-un 3919 df-in 3921 df-ss 3931 df-nul 4297 df-if 4489 df-pw 4565 df-sn 4590 df-pr 4592 df-op 4596 df-uni 4872 df-iun 4957 df-br 5108 df-opab 5170 df-mpt 5189 df-id 5533 df-po 5546 df-so 5547 df-xp 5644 df-rel 5645 df-cnv 5646 df-co 5647 df-dm 5648 df-rn 5649 df-res 5650 df-ima 5651 df-iota 6464 df-fun 6513 df-fn 6514 df-f 6515 df-f1 6516 df-fo 6517 df-f1o 6518 df-fv 6519 df-ov 7390 df-oprab 7391 df-mpo 7392 df-1st 7968 df-2nd 7969 df-er 8671 df-en 8919 df-dom 8920 df-sdom 8921 df-pnf 11210 df-mnf 11211 df-xr 11212 df-ltxr 11213 df-le 11214 df-ioo 13310

This theorem is referenced by: mbfmulc2lem 25548 mbfposr 25553 ismbf3d 25555 mbfaddlem 25561 mbfsup 25565 itg2gt0 25661 itg2cnlem1 25662 itg2cnlem2 25663 lhop2 25920 dvfsumlem2 25933 dvfsumlem2OLD 25934 dvfsumlem3 25935 dvfsumrlimge0 25937 dvfsumrlim 25938 dvfsumrlim2 25939 pntpbnd1a 27496 pntpbnd2 27498 pntibndlem2 27502 pntibndlem3 27503 pntlemi 27515 pntlemo 27518 relowlssretop 37351 itg2addnclem2 37666 iblabsnclem 37677 ftc1anclem1 37687 ftc1anclem6 37692 rfcnpre1 45013 regt1loggt0 48525 rege1logbrege0 48547 rege1logbzge0 48548 io1ii 48909

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