Theorem eliccelico 30494

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 1187	. . . . . 6 ⊢ (((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐴 ≤ 𝐵) ∧ (𝐶 ∈ (𝐴[,]𝐵) ∧ ¬ 𝐶 ∈ (𝐴[,)𝐵))) → 𝐴 ∈ ℝ*)
2		simpl2 1188	. . . . . 6 ⊢ (((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐴 ≤ 𝐵) ∧ (𝐶 ∈ (𝐴[,]𝐵) ∧ ¬ 𝐶 ∈ (𝐴[,)𝐵))) → 𝐵 ∈ ℝ*)
3		simprl 769	. . . . . 6 ⊢ (((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐴 ≤ 𝐵) ∧ (𝐶 ∈ (𝐴[,]𝐵) ∧ ¬ 𝐶 ∈ (𝐴[,)𝐵))) → 𝐶 ∈ (𝐴[,]𝐵))
4		elicc1 12776	. . . . . . . 8 ⊢ ((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ*) → (𝐶 ∈ (𝐴[,]𝐵) ↔ (𝐶 ∈ ℝ* ∧ 𝐴 ≤ 𝐶 ∧ 𝐶 ≤ 𝐵)))
5	4	biimpa 479	. . . . . . 7 ⊢ (((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ*) ∧ 𝐶 ∈ (𝐴[,]𝐵)) → (𝐶 ∈ ℝ* ∧ 𝐴 ≤ 𝐶 ∧ 𝐶 ≤ 𝐵))
6	5	simp1d 1138	. . . . . 6 ⊢ (((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ*) ∧ 𝐶 ∈ (𝐴[,]𝐵)) → 𝐶 ∈ ℝ*)
7	1, 2, 3, 6	syl21anc 835	. . . . 5 ⊢ (((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐴 ≤ 𝐵) ∧ (𝐶 ∈ (𝐴[,]𝐵) ∧ ¬ 𝐶 ∈ (𝐴[,)𝐵))) → 𝐶 ∈ ℝ*)
8	5	simp3d 1140	. . . . . 6 ⊢ (((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ*) ∧ 𝐶 ∈ (𝐴[,]𝐵)) → 𝐶 ≤ 𝐵)
9	1, 2, 3, 8	syl21anc 835	. . . . 5 ⊢ (((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐴 ≤ 𝐵) ∧ (𝐶 ∈ (𝐴[,]𝐵) ∧ ¬ 𝐶 ∈ (𝐴[,)𝐵))) → 𝐶 ≤ 𝐵)
10	1, 2	jca 514	. . . . . 6 ⊢ (((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐴 ≤ 𝐵) ∧ (𝐶 ∈ (𝐴[,]𝐵) ∧ ¬ 𝐶 ∈ (𝐴[,)𝐵))) → (𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ*))
11		simprr 771	. . . . . 6 ⊢ (((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐴 ≤ 𝐵) ∧ (𝐶 ∈ (𝐴[,]𝐵) ∧ ¬ 𝐶 ∈ (𝐴[,)𝐵))) → ¬ 𝐶 ∈ (𝐴[,)𝐵))
12	5	simp2d 1139	. . . . . . 7 ⊢ (((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ*) ∧ 𝐶 ∈ (𝐴[,]𝐵)) → 𝐴 ≤ 𝐶)
13	10, 3, 12	syl2anc 586	. . . . . 6 ⊢ (((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐴 ≤ 𝐵) ∧ (𝐶 ∈ (𝐴[,]𝐵) ∧ ¬ 𝐶 ∈ (𝐴[,)𝐵))) → 𝐴 ≤ 𝐶)
14		elico1 12775	. . . . . . . . . 10 ⊢ ((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ*) → (𝐶 ∈ (𝐴[,)𝐵) ↔ (𝐶 ∈ ℝ* ∧ 𝐴 ≤ 𝐶 ∧ 𝐶 < 𝐵)))
15	14	notbid 320	. . . . . . . . 9 ⊢ ((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ*) → (¬ 𝐶 ∈ (𝐴[,)𝐵) ↔ ¬ (𝐶 ∈ ℝ* ∧ 𝐴 ≤ 𝐶 ∧ 𝐶 < 𝐵)))
16	15	biimpa 479	. . . . . . . 8 ⊢ (((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ*) ∧ ¬ 𝐶 ∈ (𝐴[,)𝐵)) → ¬ (𝐶 ∈ ℝ* ∧ 𝐴 ≤ 𝐶 ∧ 𝐶 < 𝐵))
17		df-3an 1085	. . . . . . . . . 10 ⊢ ((𝐶 ∈ ℝ* ∧ 𝐴 ≤ 𝐶 ∧ 𝐶 < 𝐵) ↔ ((𝐶 ∈ ℝ* ∧ 𝐴 ≤ 𝐶) ∧ 𝐶 < 𝐵))
18	17	notbii 322	. . . . . . . . 9 ⊢ (¬ (𝐶 ∈ ℝ* ∧ 𝐴 ≤ 𝐶 ∧ 𝐶 < 𝐵) ↔ ¬ ((𝐶 ∈ ℝ* ∧ 𝐴 ≤ 𝐶) ∧ 𝐶 < 𝐵))
19		imnan 402	. . . . . . . . 9 ⊢ (((𝐶 ∈ ℝ* ∧ 𝐴 ≤ 𝐶) → ¬ 𝐶 < 𝐵) ↔ ¬ ((𝐶 ∈ ℝ* ∧ 𝐴 ≤ 𝐶) ∧ 𝐶 < 𝐵))
20	18, 19	bitr4i 280	. . . . . . . 8 ⊢ (¬ (𝐶 ∈ ℝ* ∧ 𝐴 ≤ 𝐶 ∧ 𝐶 < 𝐵) ↔ ((𝐶 ∈ ℝ* ∧ 𝐴 ≤ 𝐶) → ¬ 𝐶 < 𝐵))
21	16, 20	sylib 220	. . . . . . 7 ⊢ (((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ*) ∧ ¬ 𝐶 ∈ (𝐴[,)𝐵)) → ((𝐶 ∈ ℝ* ∧ 𝐴 ≤ 𝐶) → ¬ 𝐶 < 𝐵))
22	21	imp 409	. . . . . 6 ⊢ ((((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ*) ∧ ¬ 𝐶 ∈ (𝐴[,)𝐵)) ∧ (𝐶 ∈ ℝ* ∧ 𝐴 ≤ 𝐶)) → ¬ 𝐶 < 𝐵)
23	10, 11, 7, 13, 22	syl22anc 836	. . . . 5 ⊢ (((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐴 ≤ 𝐵) ∧ (𝐶 ∈ (𝐴[,]𝐵) ∧ ¬ 𝐶 ∈ (𝐴[,)𝐵))) → ¬ 𝐶 < 𝐵)
24		xeqlelt 30493	. . . . . 6 ⊢ ((𝐶 ∈ ℝ* ∧ 𝐵 ∈ ℝ*) → (𝐶 = 𝐵 ↔ (𝐶 ≤ 𝐵 ∧ ¬ 𝐶 < 𝐵)))
25	24	biimpar 480	. . . . 5 ⊢ (((𝐶 ∈ ℝ* ∧ 𝐵 ∈ ℝ*) ∧ (𝐶 ≤ 𝐵 ∧ ¬ 𝐶 < 𝐵)) → 𝐶 = 𝐵)
26	7, 2, 9, 23, 25	syl22anc 836	. . . 4 ⊢ (((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐴 ≤ 𝐵) ∧ (𝐶 ∈ (𝐴[,]𝐵) ∧ ¬ 𝐶 ∈ (𝐴[,)𝐵))) → 𝐶 = 𝐵)
27	26	ex 415	. . 3 ⊢ ((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐴 ≤ 𝐵) → ((𝐶 ∈ (𝐴[,]𝐵) ∧ ¬ 𝐶 ∈ (𝐴[,)𝐵)) → 𝐶 = 𝐵))
28		pm5.6 998	. . 3 ⊢ (((𝐶 ∈ (𝐴[,]𝐵) ∧ ¬ 𝐶 ∈ (𝐴[,)𝐵)) → 𝐶 = 𝐵) ↔ (𝐶 ∈ (𝐴[,]𝐵) → (𝐶 ∈ (𝐴[,)𝐵) ∨ 𝐶 = 𝐵)))
29	27, 28	sylib 220	. 2 ⊢ ((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐴 ≤ 𝐵) → (𝐶 ∈ (𝐴[,]𝐵) → (𝐶 ∈ (𝐴[,)𝐵) ∨ 𝐶 = 𝐵)))
30		icossicc 12818	. . . . 5 ⊢ (𝐴[,)𝐵) ⊆ (𝐴[,]𝐵)
31		simpr 487	. . . . 5 ⊢ (((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐴 ≤ 𝐵) ∧ 𝐶 ∈ (𝐴[,)𝐵)) → 𝐶 ∈ (𝐴[,)𝐵))
32	30, 31	sseldi 3964	. . . 4 ⊢ (((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐴 ≤ 𝐵) ∧ 𝐶 ∈ (𝐴[,)𝐵)) → 𝐶 ∈ (𝐴[,]𝐵))
33		simpr 487	. . . . . 6 ⊢ (((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐴 ≤ 𝐵) ∧ 𝐶 = 𝐵) → 𝐶 = 𝐵)
34		simpl2 1188	. . . . . 6 ⊢ (((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐴 ≤ 𝐵) ∧ 𝐶 = 𝐵) → 𝐵 ∈ ℝ*)
35	33, 34	eqeltrd 2913	. . . . 5 ⊢ (((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐴 ≤ 𝐵) ∧ 𝐶 = 𝐵) → 𝐶 ∈ ℝ*)
36		simpl3 1189	. . . . . 6 ⊢ (((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐴 ≤ 𝐵) ∧ 𝐶 = 𝐵) → 𝐴 ≤ 𝐵)
37	36, 33	breqtrrd 5086	. . . . 5 ⊢ (((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐴 ≤ 𝐵) ∧ 𝐶 = 𝐵) → 𝐴 ≤ 𝐶)
38	34	xrleidd 12539	. . . . . 6 ⊢ (((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐴 ≤ 𝐵) ∧ 𝐶 = 𝐵) → 𝐵 ≤ 𝐵)
39	33, 38	eqbrtrd 5080	. . . . 5 ⊢ (((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐴 ≤ 𝐵) ∧ 𝐶 = 𝐵) → 𝐶 ≤ 𝐵)
40		simpl1 1187	. . . . . 6 ⊢ (((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐴 ≤ 𝐵) ∧ 𝐶 = 𝐵) → 𝐴 ∈ ℝ*)
41	40, 34, 4	syl2anc 586	. . . . 5 ⊢ (((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐴 ≤ 𝐵) ∧ 𝐶 = 𝐵) → (𝐶 ∈ (𝐴[,]𝐵) ↔ (𝐶 ∈ ℝ* ∧ 𝐴 ≤ 𝐶 ∧ 𝐶 ≤ 𝐵)))
42	35, 37, 39, 41	mpbir3and 1338	. . . 4 ⊢ (((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐴 ≤ 𝐵) ∧ 𝐶 = 𝐵) → 𝐶 ∈ (𝐴[,]𝐵))
43	32, 42	jaodan 954	. . 3 ⊢ (((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐴 ≤ 𝐵) ∧ (𝐶 ∈ (𝐴[,)𝐵) ∨ 𝐶 = 𝐵)) → 𝐶 ∈ (𝐴[,]𝐵))
44	43	ex 415	. 2 ⊢ ((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐴 ≤ 𝐵) → ((𝐶 ∈ (𝐴[,)𝐵) ∨ 𝐶 = 𝐵) → 𝐶 ∈ (𝐴[,]𝐵)))
45	29, 44	impbid 214	1 ⊢ ((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐴 ≤ 𝐵) → (𝐶 ∈ (𝐴[,]𝐵) ↔ (𝐶 ∈ (𝐴[,)𝐵) ∨ 𝐶 = 𝐵)))

Syntax hints:  ¬ wn 3   → wi 4   ↔ wb 208   ∧ wa 398   ∨ wo 843   ∧ w3a 1083   = wceq 1533   ∈ wcel 2110   class class class wbr 5058  (class class class)co 7150  ℝ^*cxr 10668   < clt 10669   ≤ cle 10670  [,)cico 12734  [,]cicc 12735

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1792  ax-4 1806  ax-5 1907  ax-6 1966  ax-7 2011  ax-8 2112  ax-9 2120  ax-10 2141  ax-11 2157  ax-12 2173  ax-ext 2793  ax-sep 5195  ax-nul 5202  ax-pow 5258  ax-pr 5321  ax-un 7455  ax-cnex 10587  ax-resscn 10588  ax-pre-lttri 10605  ax-pre-lttrn 10606

This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3or 1084  df-3an 1085  df-tru 1536  df-ex 1777  df-nf 1781  df-sb 2066  df-mo 2618  df-eu 2650  df-clab 2800  df-cleq 2814  df-clel 2893  df-nfc 2963  df-ne 3017  df-nel 3124  df-ral 3143  df-rex 3144  df-rab 3147  df-v 3496  df-sbc 3772  df-csb 3883  df-dif 3938  df-un 3940  df-in 3942  df-ss 3951  df-nul 4291  df-if 4467  df-pw 4540  df-sn 4561  df-pr 4563  df-op 4567  df-uni 4832  df-br 5059  df-opab 5121  df-mpt 5139  df-id 5454  df-po 5468  df-so 5469  df-xp 5555  df-rel 5556  df-cnv 5557  df-co 5558  df-dm 5559  df-rn 5560  df-res 5561  df-ima 5562  df-iota 6308  df-fun 6351  df-fn 6352  df-f 6353  df-f1 6354  df-fo 6355  df-f1o 6356  df-fv 6357  df-ov 7153  df-oprab 7154  df-mpo 7155  df-er 8283  df-en 8504  df-dom 8505  df-sdom 8506  df-pnf 10671  df-mnf 10672  df-xr 10673  df-ltxr 10674  df-le 10675  df-ico 12738  df-icc 12739

This theorem is referenced by:  xrge0adddir  30674  esumcvg  31340