eliccelicod - Mathbox for Glauco Siliprandi

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Theorem eliccelicod 44229

Description: A member of a closed interval that is not the upper bound, is a member of the left-closed, right-open interval. (Contributed by Glauco Siliprandi, 17-Aug-2020.)

**Hypotheses**
Ref	Expression
eliccelicod.a	⊢ (𝜑 → 𝐴 ∈ ℝ^*)
eliccelicod.b	⊢ (𝜑 → 𝐵 ∈ ℝ^*)
eliccelicod.c	⊢ (𝜑 → 𝐶 ∈ (𝐴[,]𝐵))
eliccelicod.d	⊢ (𝜑 → 𝐶 ≠ 𝐵)

**Assertion**
Ref	Expression
eliccelicod	⊢ (𝜑 → 𝐶 ∈ (𝐴[,)𝐵))

**Proof of Theorem eliccelicod**
Step	Hyp	Ref	Expression
1		eliccelicod.a	. 2 ⊢ (𝜑 → 𝐴 ∈ ℝ^*)
2		eliccelicod.b	. 2 ⊢ (𝜑 → 𝐵 ∈ ℝ^*)
3		eliccelicod.c	. . 3 ⊢ (𝜑 → 𝐶 ∈ (𝐴[,]𝐵))
4		eliccxr 13408	. . 3 ⊢ (𝐶 ∈ (𝐴[,]𝐵) → 𝐶 ∈ ℝ^*)
5	3, 4	syl 17	. 2 ⊢ (𝜑 → 𝐶 ∈ ℝ^*)
6		iccgelb 13376	. . 3 ⊢ ((𝐴 ∈ ℝ^* ∧ 𝐵 ∈ ℝ^* ∧ 𝐶 ∈ (𝐴[,]𝐵)) → 𝐴 ≤ 𝐶)
7	1, 2, 3, 6	syl3anc 1371	. 2 ⊢ (𝜑 → 𝐴 ≤ 𝐶)
8		iccleub 13375	. . . 4 ⊢ ((𝐴 ∈ ℝ^* ∧ 𝐵 ∈ ℝ^* ∧ 𝐶 ∈ (𝐴[,]𝐵)) → 𝐶 ≤ 𝐵)
9	1, 2, 3, 8	syl3anc 1371	. . 3 ⊢ (𝜑 → 𝐶 ≤ 𝐵)
10		eliccelicod.d	. . 3 ⊢ (𝜑 → 𝐶 ≠ 𝐵)
11	5, 2, 9, 10	xrleneltd 44019	. 2 ⊢ (𝜑 → 𝐶 < 𝐵)
12	1, 2, 5, 7, 11	elicod 13370	1 ⊢ (𝜑 → 𝐶 ∈ (𝐴[,)𝐵))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ∈ wcel 2106 ≠ wne 2940 class class class wbr 5147 (class class class)co 7405 ℝ^*cxr 11243 ≤ cle 11245 [,)cico 13322 [,]cicc 13323

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2703 ax-sep 5298 ax-nul 5305 ax-pow 5362 ax-pr 5426 ax-un 7721 ax-cnex 11162 ax-resscn 11163 ax-pre-lttri 11180 ax-pre-lttrn 11181

This theorem depends on definitions: df-bi 206 df-an 397 df-or 846 df-3or 1088 df-3an 1089 df-tru 1544 df-fal 1554 df-ex 1782 df-nf 1786 df-sb 2068 df-mo 2534 df-eu 2563 df-clab 2710 df-cleq 2724 df-clel 2810 df-nfc 2885 df-ne 2941 df-nel 3047 df-ral 3062 df-rex 3071 df-rab 3433 df-v 3476 df-sbc 3777 df-csb 3893 df-dif 3950 df-un 3952 df-in 3954 df-ss 3964 df-nul 4322 df-if 4528 df-pw 4603 df-sn 4628 df-pr 4630 df-op 4634 df-uni 4908 df-iun 4998 df-br 5148 df-opab 5210 df-mpt 5231 df-id 5573 df-po 5587 df-so 5588 df-xp 5681 df-rel 5682 df-cnv 5683 df-co 5684 df-dm 5685 df-rn 5686 df-res 5687 df-ima 5688 df-iota 6492 df-fun 6542 df-fn 6543 df-f 6544 df-f1 6545 df-fo 6546 df-f1o 6547 df-fv 6548 df-ov 7408 df-oprab 7409 df-mpo 7410 df-1st 7971 df-2nd 7972 df-er 8699 df-en 8936 df-dom 8937 df-sdom 8938 df-pnf 11246 df-mnf 11247 df-xr 11248 df-ltxr 11249 df-le 11250 df-ico 13326 df-icc 13327

This theorem is referenced by: carageniuncl 45225

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