ioossioobi - Mathbox for Glauco Siliprandi

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Theorem ioossioobi 39743

Description: Biconditional form of ioossioo 12265. (Contributed by Glauco Siliprandi, 11-Dec-2019.)

**Hypotheses**
Ref	Expression
ioossioobi.a	⊢ (𝜑 → 𝐴 ∈ ℝ^*)
ioossioobi.b	⊢ (𝜑 → 𝐵 ∈ ℝ^*)
ioossioobi.c	⊢ (𝜑 → 𝐶 ∈ ℝ^*)
ioossioobi.d	⊢ (𝜑 → 𝐷 ∈ ℝ^*)
ioossioobi.cltd	⊢ (𝜑 → 𝐶 < 𝐷)

**Assertion**
Ref	Expression
ioossioobi	⊢ (𝜑 → ((𝐶(,)𝐷) ⊆ (𝐴(,)𝐵) ↔ (𝐴 ≤ 𝐶 ∧ 𝐷 ≤ 𝐵)))

Proof of Theorem ioossioobi Dummy variables 𝑤 𝑥 𝑦 𝑧 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		simpr 477	. . . . 5 ⊢ ((𝜑 ∧ (𝐶(,)𝐷) ⊆ (𝐴(,)𝐵)) → (𝐶(,)𝐷) ⊆ (𝐴(,)𝐵))
2		df-ioo 12179	. . . . . 6 ⊢ (,) = (𝑥 ∈ ℝ^, 𝑦 ∈ ℝ^ ↦ {𝑧 ∈ ℝ^* ∣ (𝑥 < 𝑧 ∧ 𝑧 < 𝑦)})
3	2	ixxssxr 12187	. . . . 5 ⊢ (𝐴(,)𝐵) ⊆ ℝ^*
4		infxrss 12169	. . . . 5 ⊢ (((𝐶(,)𝐷) ⊆ (𝐴(,)𝐵) ∧ (𝐴(,)𝐵) ⊆ ℝ^) → inf((𝐴(,)𝐵), ℝ^, < ) ≤ inf((𝐶(,)𝐷), ℝ^*, < ))
5	1, 3, 4	sylancl 694	. . . 4 ⊢ ((𝜑 ∧ (𝐶(,)𝐷) ⊆ (𝐴(,)𝐵)) → inf((𝐴(,)𝐵), ℝ^, < ) ≤ inf((𝐶(,)𝐷), ℝ^, < ))
6		ioossioobi.a	. . . . . 6 ⊢ (𝜑 → 𝐴 ∈ ℝ^*)
7	6	adantr 481	. . . . 5 ⊢ ((𝜑 ∧ (𝐶(,)𝐷) ⊆ (𝐴(,)𝐵)) → 𝐴 ∈ ℝ^*)
8		ioossioobi.b	. . . . . 6 ⊢ (𝜑 → 𝐵 ∈ ℝ^*)
9	8	adantr 481	. . . . 5 ⊢ ((𝜑 ∧ (𝐶(,)𝐷) ⊆ (𝐴(,)𝐵)) → 𝐵 ∈ ℝ^*)
10		ioossioobi.cltd	. . . . . . . 8 ⊢ (𝜑 → 𝐶 < 𝐷)
11		ioossioobi.c	. . . . . . . . 9 ⊢ (𝜑 → 𝐶 ∈ ℝ^*)
12		ioossioobi.d	. . . . . . . . 9 ⊢ (𝜑 → 𝐷 ∈ ℝ^*)
13		ioon0 12201	. . . . . . . . 9 ⊢ ((𝐶 ∈ ℝ^* ∧ 𝐷 ∈ ℝ^*) → ((𝐶(,)𝐷) ≠ ∅ ↔ 𝐶 < 𝐷))
14	11, 12, 13	syl2anc 693	. . . . . . . 8 ⊢ (𝜑 → ((𝐶(,)𝐷) ≠ ∅ ↔ 𝐶 < 𝐷))
15	10, 14	mpbird 247	. . . . . . 7 ⊢ (𝜑 → (𝐶(,)𝐷) ≠ ∅)
16	15	adantr 481	. . . . . 6 ⊢ ((𝜑 ∧ (𝐶(,)𝐷) ⊆ (𝐴(,)𝐵)) → (𝐶(,)𝐷) ≠ ∅)
17		ssn0 3976	. . . . . 6 ⊢ (((𝐶(,)𝐷) ⊆ (𝐴(,)𝐵) ∧ (𝐶(,)𝐷) ≠ ∅) → (𝐴(,)𝐵) ≠ ∅)
18	1, 16, 17	syl2anc 693	. . . . 5 ⊢ ((𝜑 ∧ (𝐶(,)𝐷) ⊆ (𝐴(,)𝐵)) → (𝐴(,)𝐵) ≠ ∅)
19		idd 24	. . . . . 6 ⊢ ((𝑤 ∈ ℝ^* ∧ 𝐵 ∈ ℝ^*) → (𝑤 < 𝐵 → 𝑤 < 𝐵))
20		xrltle 11982	. . . . . 6 ⊢ ((𝑤 ∈ ℝ^* ∧ 𝐵 ∈ ℝ^*) → (𝑤 < 𝐵 → 𝑤 ≤ 𝐵))
21		idd 24	. . . . . 6 ⊢ ((𝐴 ∈ ℝ^* ∧ 𝑤 ∈ ℝ^*) → (𝐴 < 𝑤 → 𝐴 < 𝑤))
22		xrltle 11982	. . . . . 6 ⊢ ((𝐴 ∈ ℝ^* ∧ 𝑤 ∈ ℝ^*) → (𝐴 < 𝑤 → 𝐴 ≤ 𝑤))
23	2, 19, 20, 21, 22	ixxlb 12197	. . . . 5 ⊢ ((𝐴 ∈ ℝ^* ∧ 𝐵 ∈ ℝ^* ∧ (𝐴(,)𝐵) ≠ ∅) → inf((𝐴(,)𝐵), ℝ^*, < ) = 𝐴)
24	7, 9, 18, 23	syl3anc 1326	. . . 4 ⊢ ((𝜑 ∧ (𝐶(,)𝐷) ⊆ (𝐴(,)𝐵)) → inf((𝐴(,)𝐵), ℝ^*, < ) = 𝐴)
25	11	adantr 481	. . . . 5 ⊢ ((𝜑 ∧ (𝐶(,)𝐷) ⊆ (𝐴(,)𝐵)) → 𝐶 ∈ ℝ^*)
26	12	adantr 481	. . . . 5 ⊢ ((𝜑 ∧ (𝐶(,)𝐷) ⊆ (𝐴(,)𝐵)) → 𝐷 ∈ ℝ^*)
27		idd 24	. . . . . 6 ⊢ ((𝑤 ∈ ℝ^* ∧ 𝐷 ∈ ℝ^*) → (𝑤 < 𝐷 → 𝑤 < 𝐷))
28		xrltle 11982	. . . . . 6 ⊢ ((𝑤 ∈ ℝ^* ∧ 𝐷 ∈ ℝ^*) → (𝑤 < 𝐷 → 𝑤 ≤ 𝐷))
29		idd 24	. . . . . 6 ⊢ ((𝐶 ∈ ℝ^* ∧ 𝑤 ∈ ℝ^*) → (𝐶 < 𝑤 → 𝐶 < 𝑤))
30		xrltle 11982	. . . . . 6 ⊢ ((𝐶 ∈ ℝ^* ∧ 𝑤 ∈ ℝ^*) → (𝐶 < 𝑤 → 𝐶 ≤ 𝑤))
31	2, 27, 28, 29, 30	ixxlb 12197	. . . . 5 ⊢ ((𝐶 ∈ ℝ^* ∧ 𝐷 ∈ ℝ^* ∧ (𝐶(,)𝐷) ≠ ∅) → inf((𝐶(,)𝐷), ℝ^*, < ) = 𝐶)
32	25, 26, 16, 31	syl3anc 1326	. . . 4 ⊢ ((𝜑 ∧ (𝐶(,)𝐷) ⊆ (𝐴(,)𝐵)) → inf((𝐶(,)𝐷), ℝ^*, < ) = 𝐶)
33	5, 24, 32	3brtr3d 4684	. . 3 ⊢ ((𝜑 ∧ (𝐶(,)𝐷) ⊆ (𝐴(,)𝐵)) → 𝐴 ≤ 𝐶)
34		supxrss 12162	. . . . 5 ⊢ (((𝐶(,)𝐷) ⊆ (𝐴(,)𝐵) ∧ (𝐴(,)𝐵) ⊆ ℝ^) → sup((𝐶(,)𝐷), ℝ^, < ) ≤ sup((𝐴(,)𝐵), ℝ^*, < ))
35	1, 3, 34	sylancl 694	. . . 4 ⊢ ((𝜑 ∧ (𝐶(,)𝐷) ⊆ (𝐴(,)𝐵)) → sup((𝐶(,)𝐷), ℝ^, < ) ≤ sup((𝐴(,)𝐵), ℝ^, < ))
36	2, 27, 28, 29, 30	ixxub 12196	. . . . 5 ⊢ ((𝐶 ∈ ℝ^* ∧ 𝐷 ∈ ℝ^* ∧ (𝐶(,)𝐷) ≠ ∅) → sup((𝐶(,)𝐷), ℝ^*, < ) = 𝐷)
37	25, 26, 16, 36	syl3anc 1326	. . . 4 ⊢ ((𝜑 ∧ (𝐶(,)𝐷) ⊆ (𝐴(,)𝐵)) → sup((𝐶(,)𝐷), ℝ^*, < ) = 𝐷)
38	2, 19, 20, 21, 22	ixxub 12196	. . . . 5 ⊢ ((𝐴 ∈ ℝ^* ∧ 𝐵 ∈ ℝ^* ∧ (𝐴(,)𝐵) ≠ ∅) → sup((𝐴(,)𝐵), ℝ^*, < ) = 𝐵)
39	7, 9, 18, 38	syl3anc 1326	. . . 4 ⊢ ((𝜑 ∧ (𝐶(,)𝐷) ⊆ (𝐴(,)𝐵)) → sup((𝐴(,)𝐵), ℝ^*, < ) = 𝐵)
40	35, 37, 39	3brtr3d 4684	. . 3 ⊢ ((𝜑 ∧ (𝐶(,)𝐷) ⊆ (𝐴(,)𝐵)) → 𝐷 ≤ 𝐵)
41	33, 40	jca 554	. 2 ⊢ ((𝜑 ∧ (𝐶(,)𝐷) ⊆ (𝐴(,)𝐵)) → (𝐴 ≤ 𝐶 ∧ 𝐷 ≤ 𝐵))
42	6	adantr 481	. . 3 ⊢ ((𝜑 ∧ (𝐴 ≤ 𝐶 ∧ 𝐷 ≤ 𝐵)) → 𝐴 ∈ ℝ^*)
43	8	adantr 481	. . 3 ⊢ ((𝜑 ∧ (𝐴 ≤ 𝐶 ∧ 𝐷 ≤ 𝐵)) → 𝐵 ∈ ℝ^*)
44		simprl 794	. . 3 ⊢ ((𝜑 ∧ (𝐴 ≤ 𝐶 ∧ 𝐷 ≤ 𝐵)) → 𝐴 ≤ 𝐶)
45		simprr 796	. . 3 ⊢ ((𝜑 ∧ (𝐴 ≤ 𝐶 ∧ 𝐷 ≤ 𝐵)) → 𝐷 ≤ 𝐵)
46		ioossioo 12265	. . 3 ⊢ (((𝐴 ∈ ℝ^* ∧ 𝐵 ∈ ℝ^*) ∧ (𝐴 ≤ 𝐶 ∧ 𝐷 ≤ 𝐵)) → (𝐶(,)𝐷) ⊆ (𝐴(,)𝐵))
47	42, 43, 44, 45, 46	syl22anc 1327	. 2 ⊢ ((𝜑 ∧ (𝐴 ≤ 𝐶 ∧ 𝐷 ≤ 𝐵)) → (𝐶(,)𝐷) ⊆ (𝐴(,)𝐵))
48	41, 47	impbida 877	1 ⊢ (𝜑 → ((𝐶(,)𝐷) ⊆ (𝐴(,)𝐵) ↔ (𝐴 ≤ 𝐶 ∧ 𝐷 ≤ 𝐵)))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 196 ∧ wa 384 = wceq 1483 ∈ wcel 1990 ≠ wne 2794 ⊆ wss 3574 ∅c0 3915 class class class wbr 4653 (class class class)co 6650 supcsup 8346 infcinf 8347 ℝ^*cxr 10073 < clt 10074 ≤ cle 10075 (,)cioo 12175

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1722 ax-4 1737 ax-5 1839 ax-6 1888 ax-7 1935 ax-8 1992 ax-9 1999 ax-10 2019 ax-11 2034 ax-12 2047 ax-13 2246 ax-ext 2602 ax-sep 4781 ax-nul 4789 ax-pow 4843 ax-pr 4906 ax-un 6949 ax-cnex 9992 ax-resscn 9993 ax-1cn 9994 ax-icn 9995 ax-addcl 9996 ax-addrcl 9997 ax-mulcl 9998 ax-mulrcl 9999 ax-mulcom 10000 ax-addass 10001 ax-mulass 10002 ax-distr 10003 ax-i2m1 10004 ax-1ne0 10005 ax-1rid 10006 ax-rnegex 10007 ax-rrecex 10008 ax-cnre 10009 ax-pre-lttri 10010 ax-pre-lttrn 10011 ax-pre-ltadd 10012 ax-pre-mulgt0 10013 ax-pre-sup 10014

This theorem depends on definitions: df-bi 197 df-or 385 df-an 386 df-3or 1038 df-3an 1039 df-tru 1486 df-ex 1705 df-nf 1710 df-sb 1881 df-eu 2474 df-mo 2475 df-clab 2609 df-cleq 2615 df-clel 2618 df-nfc 2753 df-ne 2795 df-nel 2898 df-ral 2917 df-rex 2918 df-reu 2919 df-rmo 2920 df-rab 2921 df-v 3202 df-sbc 3436 df-csb 3534 df-dif 3577 df-un 3579 df-in 3581 df-ss 3588 df-pss 3590 df-nul 3916 df-if 4087 df-pw 4160 df-sn 4178 df-pr 4180 df-tp 4182 df-op 4184 df-uni 4437 df-iun 4522 df-br 4654 df-opab 4713 df-mpt 4730 df-tr 4753 df-id 5024 df-eprel 5029 df-po 5035 df-so 5036 df-fr 5073 df-we 5075 df-xp 5120 df-rel 5121 df-cnv 5122 df-co 5123 df-dm 5124 df-rn 5125 df-res 5126 df-ima 5127 df-pred 5680 df-ord 5726 df-on 5727 df-lim 5728 df-suc 5729 df-iota 5851 df-fun 5890 df-fn 5891 df-f 5892 df-f1 5893 df-fo 5894 df-f1o 5895 df-fv 5896 df-riota 6611 df-ov 6653 df-oprab 6654 df-mpt2 6655 df-om 7066 df-1st 7168 df-2nd 7169 df-wrecs 7407 df-recs 7468 df-rdg 7506 df-er 7742 df-en 7956 df-dom 7957 df-sdom 7958 df-sup 8348 df-inf 8349 df-pnf 10076 df-mnf 10077 df-xr 10078 df-ltxr 10079 df-le 10080 df-sub 10268 df-neg 10269 df-div 10685 df-nn 11021 df-n0 11293 df-z 11378 df-uz 11688 df-q 11789 df-ioo 12179

This theorem is referenced by: fourierdlem50 40373

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