lbioo - Metamath Proof Explorer

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Theorem lbioo 12077

Description: An open interval does not contain its left endpoint. (Contributed by Mario Carneiro, 29-Dec-2016.)

**Assertion**
Ref	Expression
lbioo	⊢ ¬ 𝐴 ∈ (𝐴(,)𝐵)

**Proof of Theorem lbioo**
Step	Hyp	Ref	Expression
1		elioo3g 12075	. . . 4 ⊢ (𝐴 ∈ (𝐴(,)𝐵) ↔ ((𝐴 ∈ ℝ^* ∧ 𝐵 ∈ ℝ^* ∧ 𝐴 ∈ ℝ^*) ∧ (𝐴 < 𝐴 ∧ 𝐴 < 𝐵)))
2	1	simprbi 479	. . 3 ⊢ (𝐴 ∈ (𝐴(,)𝐵) → (𝐴 < 𝐴 ∧ 𝐴 < 𝐵))
3	2	simpld 474	. 2 ⊢ (𝐴 ∈ (𝐴(,)𝐵) → 𝐴 < 𝐴)
4	1	simplbi 475	. . . 4 ⊢ (𝐴 ∈ (𝐴(,)𝐵) → (𝐴 ∈ ℝ^* ∧ 𝐵 ∈ ℝ^* ∧ 𝐴 ∈ ℝ^*))
5	4	simp3d 1068	. . 3 ⊢ (𝐴 ∈ (𝐴(,)𝐵) → 𝐴 ∈ ℝ^*)
6		xrltnr 11829	. . 3 ⊢ (𝐴 ∈ ℝ^* → ¬ 𝐴 < 𝐴)
7	5, 6	syl 17	. 2 ⊢ (𝐴 ∈ (𝐴(,)𝐵) → ¬ 𝐴 < 𝐴)
8	3, 7	pm2.65i 184	1 ⊢ ¬ 𝐴 ∈ (𝐴(,)𝐵)

Colors of variables: wff setvar class

Syntax hints: ¬ wn 3 ∧ wa 383 ∧ w3a 1031 ∈ wcel 1977 class class class wbr 4583 (class class class)co 6549 ℝ^*cxr 9952 < clt 9953 (,)cioo 12046

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1713 ax-4 1728 ax-5 1827 ax-6 1875 ax-7 1922 ax-8 1979 ax-9 1986 ax-10 2006 ax-11 2021 ax-12 2034 ax-13 2234 ax-ext 2590 ax-sep 4709 ax-nul 4717 ax-pow 4769 ax-pr 4833 ax-un 6847 ax-cnex 9871 ax-resscn 9872 ax-pre-lttri 9889 ax-pre-lttrn 9890

This theorem depends on definitions: df-bi 196 df-or 384 df-an 385 df-3or 1032 df-3an 1033 df-tru 1478 df-ex 1696 df-nf 1701 df-sb 1868 df-eu 2462 df-mo 2463 df-clab 2597 df-cleq 2603 df-clel 2606 df-nfc 2740 df-ne 2782 df-nel 2783 df-ral 2901 df-rex 2902 df-rab 2905 df-v 3175 df-sbc 3403 df-csb 3500 df-dif 3543 df-un 3545 df-in 3547 df-ss 3554 df-nul 3875 df-if 4037 df-pw 4110 df-sn 4126 df-pr 4128 df-op 4132 df-uni 4373 df-iun 4457 df-br 4584 df-opab 4644 df-mpt 4645 df-id 4953 df-po 4959 df-so 4960 df-xp 5044 df-rel 5045 df-cnv 5046 df-co 5047 df-dm 5048 df-rn 5049 df-res 5050 df-ima 5051 df-iota 5768 df-fun 5806 df-fn 5807 df-f 5808 df-f1 5809 df-fo 5810 df-f1o 5811 df-fv 5812 df-ov 6552 df-oprab 6553 df-mpt2 6554 df-1st 7059 df-2nd 7060 df-er 7629 df-en 7842 df-dom 7843 df-sdom 7844 df-pnf 9955 df-mnf 9956 df-xr 9957 df-ltxr 9958 df-ioo 12050

This theorem is referenced by: lhop1lem 23580 lhop1 23581 lhop 23583 iooinlbub 38570 lptioo1 38699 volico 38876 fourierdlem61 39060

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