Theorem eliccelico 28929

Description: Relate elementhood to a closed interval with elementhood to the same closed-below, open-above interval or to its upper bound. (Contributed by Thierry Arnoux, 3-Jul-2017.)

Assertion

Ref	Expression
eliccelico	⊢ ((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐴 ≤ 𝐵) → (𝐶 ∈ (𝐴[,]𝐵) ↔ (𝐶 ∈ (𝐴[,)𝐵) ∨ 𝐶 = 𝐵)))

Proof of Theorem eliccelico

Step	Hyp	Ref	Expression
1		simpl1 1057	. . . . . 6 ⊢ (((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐴 ≤ 𝐵) ∧ (𝐶 ∈ (𝐴[,]𝐵) ∧ ¬ 𝐶 ∈ (𝐴[,)𝐵))) → 𝐴 ∈ ℝ*)
2		simpl2 1058	. . . . . 6 ⊢ (((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐴 ≤ 𝐵) ∧ (𝐶 ∈ (𝐴[,]𝐵) ∧ ¬ 𝐶 ∈ (𝐴[,)𝐵))) → 𝐵 ∈ ℝ*)
3		simprl 790	. . . . . 6 ⊢ (((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐴 ≤ 𝐵) ∧ (𝐶 ∈ (𝐴[,]𝐵) ∧ ¬ 𝐶 ∈ (𝐴[,)𝐵))) → 𝐶 ∈ (𝐴[,]𝐵))
4		elicc1 12090	. . . . . . . 8 ⊢ ((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ*) → (𝐶 ∈ (𝐴[,]𝐵) ↔ (𝐶 ∈ ℝ* ∧ 𝐴 ≤ 𝐶 ∧ 𝐶 ≤ 𝐵)))
5	4	biimpa 500	. . . . . . 7 ⊢ (((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ*) ∧ 𝐶 ∈ (𝐴[,]𝐵)) → (𝐶 ∈ ℝ* ∧ 𝐴 ≤ 𝐶 ∧ 𝐶 ≤ 𝐵))
6	5	simp1d 1066	. . . . . 6 ⊢ (((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ*) ∧ 𝐶 ∈ (𝐴[,]𝐵)) → 𝐶 ∈ ℝ*)
7	1, 2, 3, 6	syl21anc 1317	. . . . 5 ⊢ (((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐴 ≤ 𝐵) ∧ (𝐶 ∈ (𝐴[,]𝐵) ∧ ¬ 𝐶 ∈ (𝐴[,)𝐵))) → 𝐶 ∈ ℝ*)
8	5	simp3d 1068	. . . . . 6 ⊢ (((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ*) ∧ 𝐶 ∈ (𝐴[,]𝐵)) → 𝐶 ≤ 𝐵)
9	1, 2, 3, 8	syl21anc 1317	. . . . 5 ⊢ (((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐴 ≤ 𝐵) ∧ (𝐶 ∈ (𝐴[,]𝐵) ∧ ¬ 𝐶 ∈ (𝐴[,)𝐵))) → 𝐶 ≤ 𝐵)
10	1, 2	jca 553	. . . . . 6 ⊢ (((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐴 ≤ 𝐵) ∧ (𝐶 ∈ (𝐴[,]𝐵) ∧ ¬ 𝐶 ∈ (𝐴[,)𝐵))) → (𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ*))
11		simprr 792	. . . . . 6 ⊢ (((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐴 ≤ 𝐵) ∧ (𝐶 ∈ (𝐴[,]𝐵) ∧ ¬ 𝐶 ∈ (𝐴[,)𝐵))) → ¬ 𝐶 ∈ (𝐴[,)𝐵))
12	5	simp2d 1067	. . . . . . 7 ⊢ (((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ*) ∧ 𝐶 ∈ (𝐴[,]𝐵)) → 𝐴 ≤ 𝐶)
13	10, 3, 12	syl2anc 691	. . . . . 6 ⊢ (((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐴 ≤ 𝐵) ∧ (𝐶 ∈ (𝐴[,]𝐵) ∧ ¬ 𝐶 ∈ (𝐴[,)𝐵))) → 𝐴 ≤ 𝐶)
14		elico1 12089	. . . . . . . . . 10 ⊢ ((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ*) → (𝐶 ∈ (𝐴[,)𝐵) ↔ (𝐶 ∈ ℝ* ∧ 𝐴 ≤ 𝐶 ∧ 𝐶 < 𝐵)))
15	14	notbid 307	. . . . . . . . 9 ⊢ ((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ*) → (¬ 𝐶 ∈ (𝐴[,)𝐵) ↔ ¬ (𝐶 ∈ ℝ* ∧ 𝐴 ≤ 𝐶 ∧ 𝐶 < 𝐵)))
16	15	biimpa 500	. . . . . . . 8 ⊢ (((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ*) ∧ ¬ 𝐶 ∈ (𝐴[,)𝐵)) → ¬ (𝐶 ∈ ℝ* ∧ 𝐴 ≤ 𝐶 ∧ 𝐶 < 𝐵))
17		df-3an 1033	. . . . . . . . . 10 ⊢ ((𝐶 ∈ ℝ* ∧ 𝐴 ≤ 𝐶 ∧ 𝐶 < 𝐵) ↔ ((𝐶 ∈ ℝ* ∧ 𝐴 ≤ 𝐶) ∧ 𝐶 < 𝐵))
18	17	notbii 309	. . . . . . . . 9 ⊢ (¬ (𝐶 ∈ ℝ* ∧ 𝐴 ≤ 𝐶 ∧ 𝐶 < 𝐵) ↔ ¬ ((𝐶 ∈ ℝ* ∧ 𝐴 ≤ 𝐶) ∧ 𝐶 < 𝐵))
19		imnan 437	. . . . . . . . 9 ⊢ (((𝐶 ∈ ℝ* ∧ 𝐴 ≤ 𝐶) → ¬ 𝐶 < 𝐵) ↔ ¬ ((𝐶 ∈ ℝ* ∧ 𝐴 ≤ 𝐶) ∧ 𝐶 < 𝐵))
20	18, 19	bitr4i 266	. . . . . . . 8 ⊢ (¬ (𝐶 ∈ ℝ* ∧ 𝐴 ≤ 𝐶 ∧ 𝐶 < 𝐵) ↔ ((𝐶 ∈ ℝ* ∧ 𝐴 ≤ 𝐶) → ¬ 𝐶 < 𝐵))
21	16, 20	sylib 207	. . . . . . 7 ⊢ (((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ*) ∧ ¬ 𝐶 ∈ (𝐴[,)𝐵)) → ((𝐶 ∈ ℝ* ∧ 𝐴 ≤ 𝐶) → ¬ 𝐶 < 𝐵))
22	21	imp 444	. . . . . 6 ⊢ ((((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ*) ∧ ¬ 𝐶 ∈ (𝐴[,)𝐵)) ∧ (𝐶 ∈ ℝ* ∧ 𝐴 ≤ 𝐶)) → ¬ 𝐶 < 𝐵)
23	10, 11, 7, 13, 22	syl22anc 1319	. . . . 5 ⊢ (((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐴 ≤ 𝐵) ∧ (𝐶 ∈ (𝐴[,]𝐵) ∧ ¬ 𝐶 ∈ (𝐴[,)𝐵))) → ¬ 𝐶 < 𝐵)
24		xeqlelt 28928	. . . . . 6 ⊢ ((𝐶 ∈ ℝ* ∧ 𝐵 ∈ ℝ*) → (𝐶 = 𝐵 ↔ (𝐶 ≤ 𝐵 ∧ ¬ 𝐶 < 𝐵)))
25	24	biimpar 501	. . . . 5 ⊢ (((𝐶 ∈ ℝ* ∧ 𝐵 ∈ ℝ*) ∧ (𝐶 ≤ 𝐵 ∧ ¬ 𝐶 < 𝐵)) → 𝐶 = 𝐵)
26	7, 2, 9, 23, 25	syl22anc 1319	. . . 4 ⊢ (((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐴 ≤ 𝐵) ∧ (𝐶 ∈ (𝐴[,]𝐵) ∧ ¬ 𝐶 ∈ (𝐴[,)𝐵))) → 𝐶 = 𝐵)
27	26	ex 449	. . 3 ⊢ ((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐴 ≤ 𝐵) → ((𝐶 ∈ (𝐴[,]𝐵) ∧ ¬ 𝐶 ∈ (𝐴[,)𝐵)) → 𝐶 = 𝐵))
28		pm5.6 949	. . 3 ⊢ (((𝐶 ∈ (𝐴[,]𝐵) ∧ ¬ 𝐶 ∈ (𝐴[,)𝐵)) → 𝐶 = 𝐵) ↔ (𝐶 ∈ (𝐴[,]𝐵) → (𝐶 ∈ (𝐴[,)𝐵) ∨ 𝐶 = 𝐵)))
29	27, 28	sylib 207	. 2 ⊢ ((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐴 ≤ 𝐵) → (𝐶 ∈ (𝐴[,]𝐵) → (𝐶 ∈ (𝐴[,)𝐵) ∨ 𝐶 = 𝐵)))
30		icossicc 12131	. . . . 5 ⊢ (𝐴[,)𝐵) ⊆ (𝐴[,]𝐵)
31		simpr 476	. . . . 5 ⊢ (((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐴 ≤ 𝐵) ∧ 𝐶 ∈ (𝐴[,)𝐵)) → 𝐶 ∈ (𝐴[,)𝐵))
32	30, 31	sseldi 3566	. . . 4 ⊢ (((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐴 ≤ 𝐵) ∧ 𝐶 ∈ (𝐴[,)𝐵)) → 𝐶 ∈ (𝐴[,]𝐵))
33		simpr 476	. . . . . 6 ⊢ (((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐴 ≤ 𝐵) ∧ 𝐶 = 𝐵) → 𝐶 = 𝐵)
34		simpl2 1058	. . . . . 6 ⊢ (((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐴 ≤ 𝐵) ∧ 𝐶 = 𝐵) → 𝐵 ∈ ℝ*)
35	33, 34	eqeltrd 2688	. . . . 5 ⊢ (((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐴 ≤ 𝐵) ∧ 𝐶 = 𝐵) → 𝐶 ∈ ℝ*)
36		simpl3 1059	. . . . . 6 ⊢ (((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐴 ≤ 𝐵) ∧ 𝐶 = 𝐵) → 𝐴 ≤ 𝐵)
37	36, 33	breqtrrd 4611	. . . . 5 ⊢ (((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐴 ≤ 𝐵) ∧ 𝐶 = 𝐵) → 𝐴 ≤ 𝐶)
38		xrleid 11859	. . . . . . 7 ⊢ (𝐵 ∈ ℝ* → 𝐵 ≤ 𝐵)
39	34, 38	syl 17	. . . . . 6 ⊢ (((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐴 ≤ 𝐵) ∧ 𝐶 = 𝐵) → 𝐵 ≤ 𝐵)
40	33, 39	eqbrtrd 4605	. . . . 5 ⊢ (((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐴 ≤ 𝐵) ∧ 𝐶 = 𝐵) → 𝐶 ≤ 𝐵)
41		simpl1 1057	. . . . . 6 ⊢ (((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐴 ≤ 𝐵) ∧ 𝐶 = 𝐵) → 𝐴 ∈ ℝ*)
42	41, 34, 4	syl2anc 691	. . . . 5 ⊢ (((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐴 ≤ 𝐵) ∧ 𝐶 = 𝐵) → (𝐶 ∈ (𝐴[,]𝐵) ↔ (𝐶 ∈ ℝ* ∧ 𝐴 ≤ 𝐶 ∧ 𝐶 ≤ 𝐵)))
43	35, 37, 40, 42	mpbir3and 1238	. . . 4 ⊢ (((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐴 ≤ 𝐵) ∧ 𝐶 = 𝐵) → 𝐶 ∈ (𝐴[,]𝐵))
44	32, 43	jaodan 822	. . 3 ⊢ (((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐴 ≤ 𝐵) ∧ (𝐶 ∈ (𝐴[,)𝐵) ∨ 𝐶 = 𝐵)) → 𝐶 ∈ (𝐴[,]𝐵))
45	44	ex 449	. 2 ⊢ ((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐴 ≤ 𝐵) → ((𝐶 ∈ (𝐴[,)𝐵) ∨ 𝐶 = 𝐵) → 𝐶 ∈ (𝐴[,]𝐵)))
46	29, 45	impbid 201	1 ⊢ ((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐴 ≤ 𝐵) → (𝐶 ∈ (𝐴[,]𝐵) ↔ (𝐶 ∈ (𝐴[,)𝐵) ∨ 𝐶 = 𝐵)))

Syntax hints:  ¬ wn 3   → wi 4   ↔ wb 195   ∨ wo 382   ∧ wa 383   ∧ w3a 1031   = wceq 1475   ∈ wcel 1977   class class class wbr 4583  (class class class)co 6549  ℝ^*cxr 9952   < clt 9953   ≤ cle 9954  [,)cico 12048  [,]cicc 12049

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-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-er 7629  df-en 7842  df-dom 7843  df-sdom 7844  df-pnf 9955  df-mnf 9956  df-xr 9957  df-ltxr 9958  df-le 9959  df-ico 12052  df-icc 12053

This theorem is referenced by:  xrge0adddir  29023  esumcvg  29475