ioossioobi - Mathbox for Glauco Siliprandi

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Theorem ioossioobi 45435

Description: Biconditional form of ioossioo 13501. (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 484	. . . . 5 ⊢ ((𝜑 ∧ (𝐶(,)𝐷) ⊆ (𝐴(,)𝐵)) → (𝐶(,)𝐷) ⊆ (𝐴(,)𝐵))
2		df-ioo 13411	. . . . . 6 ⊢ (,) = (𝑥 ∈ ℝ^, 𝑦 ∈ ℝ^ ↦ {𝑧 ∈ ℝ^* ∣ (𝑥 < 𝑧 ∧ 𝑧 < 𝑦)})
3	2	ixxssxr 13419	. . . . 5 ⊢ (𝐴(,)𝐵) ⊆ ℝ^*
4		infxrss 13401	. . . . 5 ⊢ (((𝐶(,)𝐷) ⊆ (𝐴(,)𝐵) ∧ (𝐴(,)𝐵) ⊆ ℝ^) → inf((𝐴(,)𝐵), ℝ^, < ) ≤ inf((𝐶(,)𝐷), ℝ^*, < ))
5	1, 3, 4	sylancl 585	. . . 4 ⊢ ((𝜑 ∧ (𝐶(,)𝐷) ⊆ (𝐴(,)𝐵)) → inf((𝐴(,)𝐵), ℝ^, < ) ≤ inf((𝐶(,)𝐷), ℝ^, < ))
6		ioossioobi.a	. . . . . 6 ⊢ (𝜑 → 𝐴 ∈ ℝ^*)
7	6	adantr 480	. . . . 5 ⊢ ((𝜑 ∧ (𝐶(,)𝐷) ⊆ (𝐴(,)𝐵)) → 𝐴 ∈ ℝ^*)
8		ioossioobi.b	. . . . . 6 ⊢ (𝜑 → 𝐵 ∈ ℝ^*)
9	8	adantr 480	. . . . 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 13433	. . . . . . . . 9 ⊢ ((𝐶 ∈ ℝ^* ∧ 𝐷 ∈ ℝ^*) → ((𝐶(,)𝐷) ≠ ∅ ↔ 𝐶 < 𝐷))
14	11, 12, 13	syl2anc 583	. . . . . . . 8 ⊢ (𝜑 → ((𝐶(,)𝐷) ≠ ∅ ↔ 𝐶 < 𝐷))
15	10, 14	mpbird 257	. . . . . . 7 ⊢ (𝜑 → (𝐶(,)𝐷) ≠ ∅)
16	15	adantr 480	. . . . . 6 ⊢ ((𝜑 ∧ (𝐶(,)𝐷) ⊆ (𝐴(,)𝐵)) → (𝐶(,)𝐷) ≠ ∅)
17		ssn0 4427	. . . . . 6 ⊢ (((𝐶(,)𝐷) ⊆ (𝐴(,)𝐵) ∧ (𝐶(,)𝐷) ≠ ∅) → (𝐴(,)𝐵) ≠ ∅)
18	1, 16, 17	syl2anc 583	. . . . 5 ⊢ ((𝜑 ∧ (𝐶(,)𝐷) ⊆ (𝐴(,)𝐵)) → (𝐴(,)𝐵) ≠ ∅)
19		idd 24	. . . . . 6 ⊢ ((𝑤 ∈ ℝ^* ∧ 𝐵 ∈ ℝ^*) → (𝑤 < 𝐵 → 𝑤 < 𝐵))
20		xrltle 13211	. . . . . 6 ⊢ ((𝑤 ∈ ℝ^* ∧ 𝐵 ∈ ℝ^*) → (𝑤 < 𝐵 → 𝑤 ≤ 𝐵))
21		idd 24	. . . . . 6 ⊢ ((𝐴 ∈ ℝ^* ∧ 𝑤 ∈ ℝ^*) → (𝐴 < 𝑤 → 𝐴 < 𝑤))
22		xrltle 13211	. . . . . 6 ⊢ ((𝐴 ∈ ℝ^* ∧ 𝑤 ∈ ℝ^*) → (𝐴 < 𝑤 → 𝐴 ≤ 𝑤))
23	2, 19, 20, 21, 22	ixxlb 13429	. . . . 5 ⊢ ((𝐴 ∈ ℝ^* ∧ 𝐵 ∈ ℝ^* ∧ (𝐴(,)𝐵) ≠ ∅) → inf((𝐴(,)𝐵), ℝ^*, < ) = 𝐴)
24	7, 9, 18, 23	syl3anc 1371	. . . 4 ⊢ ((𝜑 ∧ (𝐶(,)𝐷) ⊆ (𝐴(,)𝐵)) → inf((𝐴(,)𝐵), ℝ^*, < ) = 𝐴)
25	11	adantr 480	. . . . 5 ⊢ ((𝜑 ∧ (𝐶(,)𝐷) ⊆ (𝐴(,)𝐵)) → 𝐶 ∈ ℝ^*)
26	12	adantr 480	. . . . 5 ⊢ ((𝜑 ∧ (𝐶(,)𝐷) ⊆ (𝐴(,)𝐵)) → 𝐷 ∈ ℝ^*)
27		idd 24	. . . . . 6 ⊢ ((𝑤 ∈ ℝ^* ∧ 𝐷 ∈ ℝ^*) → (𝑤 < 𝐷 → 𝑤 < 𝐷))
28		xrltle 13211	. . . . . 6 ⊢ ((𝑤 ∈ ℝ^* ∧ 𝐷 ∈ ℝ^*) → (𝑤 < 𝐷 → 𝑤 ≤ 𝐷))
29		idd 24	. . . . . 6 ⊢ ((𝐶 ∈ ℝ^* ∧ 𝑤 ∈ ℝ^*) → (𝐶 < 𝑤 → 𝐶 < 𝑤))
30		xrltle 13211	. . . . . 6 ⊢ ((𝐶 ∈ ℝ^* ∧ 𝑤 ∈ ℝ^*) → (𝐶 < 𝑤 → 𝐶 ≤ 𝑤))
31	2, 27, 28, 29, 30	ixxlb 13429	. . . . 5 ⊢ ((𝐶 ∈ ℝ^* ∧ 𝐷 ∈ ℝ^* ∧ (𝐶(,)𝐷) ≠ ∅) → inf((𝐶(,)𝐷), ℝ^*, < ) = 𝐶)
32	25, 26, 16, 31	syl3anc 1371	. . . 4 ⊢ ((𝜑 ∧ (𝐶(,)𝐷) ⊆ (𝐴(,)𝐵)) → inf((𝐶(,)𝐷), ℝ^*, < ) = 𝐶)
33	5, 24, 32	3brtr3d 5197	. . 3 ⊢ ((𝜑 ∧ (𝐶(,)𝐷) ⊆ (𝐴(,)𝐵)) → 𝐴 ≤ 𝐶)
34		supxrss 13394	. . . . 5 ⊢ (((𝐶(,)𝐷) ⊆ (𝐴(,)𝐵) ∧ (𝐴(,)𝐵) ⊆ ℝ^) → sup((𝐶(,)𝐷), ℝ^, < ) ≤ sup((𝐴(,)𝐵), ℝ^*, < ))
35	1, 3, 34	sylancl 585	. . . 4 ⊢ ((𝜑 ∧ (𝐶(,)𝐷) ⊆ (𝐴(,)𝐵)) → sup((𝐶(,)𝐷), ℝ^, < ) ≤ sup((𝐴(,)𝐵), ℝ^, < ))
36	2, 27, 28, 29, 30	ixxub 13428	. . . . 5 ⊢ ((𝐶 ∈ ℝ^* ∧ 𝐷 ∈ ℝ^* ∧ (𝐶(,)𝐷) ≠ ∅) → sup((𝐶(,)𝐷), ℝ^*, < ) = 𝐷)
37	25, 26, 16, 36	syl3anc 1371	. . . 4 ⊢ ((𝜑 ∧ (𝐶(,)𝐷) ⊆ (𝐴(,)𝐵)) → sup((𝐶(,)𝐷), ℝ^*, < ) = 𝐷)
38	2, 19, 20, 21, 22	ixxub 13428	. . . . 5 ⊢ ((𝐴 ∈ ℝ^* ∧ 𝐵 ∈ ℝ^* ∧ (𝐴(,)𝐵) ≠ ∅) → sup((𝐴(,)𝐵), ℝ^*, < ) = 𝐵)
39	7, 9, 18, 38	syl3anc 1371	. . . 4 ⊢ ((𝜑 ∧ (𝐶(,)𝐷) ⊆ (𝐴(,)𝐵)) → sup((𝐴(,)𝐵), ℝ^*, < ) = 𝐵)
40	35, 37, 39	3brtr3d 5197	. . 3 ⊢ ((𝜑 ∧ (𝐶(,)𝐷) ⊆ (𝐴(,)𝐵)) → 𝐷 ≤ 𝐵)
41	33, 40	jca 511	. 2 ⊢ ((𝜑 ∧ (𝐶(,)𝐷) ⊆ (𝐴(,)𝐵)) → (𝐴 ≤ 𝐶 ∧ 𝐷 ≤ 𝐵))
42	6	adantr 480	. . 3 ⊢ ((𝜑 ∧ (𝐴 ≤ 𝐶 ∧ 𝐷 ≤ 𝐵)) → 𝐴 ∈ ℝ^*)
43	8	adantr 480	. . 3 ⊢ ((𝜑 ∧ (𝐴 ≤ 𝐶 ∧ 𝐷 ≤ 𝐵)) → 𝐵 ∈ ℝ^*)
44		simprl 770	. . 3 ⊢ ((𝜑 ∧ (𝐴 ≤ 𝐶 ∧ 𝐷 ≤ 𝐵)) → 𝐴 ≤ 𝐶)
45		simprr 772	. . 3 ⊢ ((𝜑 ∧ (𝐴 ≤ 𝐶 ∧ 𝐷 ≤ 𝐵)) → 𝐷 ≤ 𝐵)
46		ioossioo 13501	. . 3 ⊢ (((𝐴 ∈ ℝ^* ∧ 𝐵 ∈ ℝ^*) ∧ (𝐴 ≤ 𝐶 ∧ 𝐷 ≤ 𝐵)) → (𝐶(,)𝐷) ⊆ (𝐴(,)𝐵))
47	42, 43, 44, 45, 46	syl22anc 838	. 2 ⊢ ((𝜑 ∧ (𝐴 ≤ 𝐶 ∧ 𝐷 ≤ 𝐵)) → (𝐶(,)𝐷) ⊆ (𝐴(,)𝐵))
48	41, 47	impbida 800	1 ⊢ (𝜑 → ((𝐶(,)𝐷) ⊆ (𝐴(,)𝐵) ↔ (𝐴 ≤ 𝐶 ∧ 𝐷 ≤ 𝐵)))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 206 ∧ wa 395 = wceq 1537 ∈ wcel 2108 ≠ wne 2946 ⊆ wss 3976 ∅c0 4352 class class class wbr 5166 (class class class)co 7448 supcsup 9509 infcinf 9510 ℝ^*cxr 11323 < clt 11324 ≤ cle 11325 (,)cioo 13407

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1793 ax-4 1807 ax-5 1909 ax-6 1967 ax-7 2007 ax-8 2110 ax-9 2118 ax-10 2141 ax-11 2158 ax-12 2178 ax-ext 2711 ax-sep 5317 ax-nul 5324 ax-pow 5383 ax-pr 5447 ax-un 7770 ax-cnex 11240 ax-resscn 11241 ax-1cn 11242 ax-icn 11243 ax-addcl 11244 ax-addrcl 11245 ax-mulcl 11246 ax-mulrcl 11247 ax-mulcom 11248 ax-addass 11249 ax-mulass 11250 ax-distr 11251 ax-i2m1 11252 ax-1ne0 11253 ax-1rid 11254 ax-rnegex 11255 ax-rrecex 11256 ax-cnre 11257 ax-pre-lttri 11258 ax-pre-lttrn 11259 ax-pre-ltadd 11260 ax-pre-mulgt0 11261 ax-pre-sup 11262

This theorem depends on definitions: df-bi 207 df-an 396 df-or 847 df-3or 1088 df-3an 1089 df-tru 1540 df-fal 1550 df-ex 1778 df-nf 1782 df-sb 2065 df-mo 2543 df-eu 2572 df-clab 2718 df-cleq 2732 df-clel 2819 df-nfc 2895 df-ne 2947 df-nel 3053 df-ral 3068 df-rex 3077 df-rmo 3388 df-reu 3389 df-rab 3444 df-v 3490 df-sbc 3805 df-csb 3922 df-dif 3979 df-un 3981 df-in 3983 df-ss 3993 df-pss 3996 df-nul 4353 df-if 4549 df-pw 4624 df-sn 4649 df-pr 4651 df-op 4655 df-uni 4932 df-iun 5017 df-br 5167 df-opab 5229 df-mpt 5250 df-tr 5284 df-id 5593 df-eprel 5599 df-po 5607 df-so 5608 df-fr 5652 df-we 5654 df-xp 5706 df-rel 5707 df-cnv 5708 df-co 5709 df-dm 5710 df-rn 5711 df-res 5712 df-ima 5713 df-pred 6332 df-ord 6398 df-on 6399 df-lim 6400 df-suc 6401 df-iota 6525 df-fun 6575 df-fn 6576 df-f 6577 df-f1 6578 df-fo 6579 df-f1o 6580 df-fv 6581 df-riota 7404 df-ov 7451 df-oprab 7452 df-mpo 7453 df-om 7904 df-1st 8030 df-2nd 8031 df-frecs 8322 df-wrecs 8353 df-recs 8427 df-rdg 8466 df-er 8763 df-en 9004 df-dom 9005 df-sdom 9006 df-sup 9511 df-inf 9512 df-pnf 11326 df-mnf 11327 df-xr 11328 df-ltxr 11329 df-le 11330 df-sub 11522 df-neg 11523 df-div 11948 df-nn 12294 df-n0 12554 df-z 12640 df-uz 12904 df-q 13014 df-ioo 13411

This theorem is referenced by: fourierdlem50 46077

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