hoidifhspdmvle - Mathbox for Glauco Siliprandi

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Theorem hoidifhspdmvle 45634

Description: The dimensional volume of the difference of a half-open interval and a half-space is less than or equal to the dimensional volume of the whole half-open interval. Used in Lemma 115F of [Fremlin1] p. 31 . (Contributed by Glauco Siliprandi, 24-Dec-2020.)

**Hypotheses**
Ref	Expression
hoidifhspdmvle.l	⊢ 𝐿 = (𝑥 ∈ Fin ↦ (𝑎 ∈ (ℝ ↑_m 𝑥), 𝑏 ∈ (ℝ ↑_m 𝑥) ↦ if(𝑥 = ∅, 0, ∏𝑘 ∈ 𝑥 (vol‘((𝑎‘𝑘)[,)(𝑏‘𝑘))))))
hoidifhspdmvle.x	⊢ (𝜑 → 𝑋 ∈ Fin)
hoidifhspdmvle.a	⊢ (𝜑 → 𝐴:𝑋⟶ℝ)
hoidifhspdmvle.b	⊢ (𝜑 → 𝐵:𝑋⟶ℝ)
hoidifhspdmvle.k	⊢ (𝜑 → 𝐾 ∈ 𝑋)
hoidifhspdmvle.d	⊢ 𝐷 = (𝑥 ∈ ℝ ↦ (𝑐 ∈ (ℝ ↑_m 𝑋) ↦ (ℎ ∈ 𝑋 ↦ if(ℎ = 𝐾, if(𝑥 ≤ (𝑐‘ℎ), (𝑐‘ℎ), 𝑥), (𝑐‘ℎ)))))
hoidifhspdmvle.y	⊢ (𝜑 → 𝑌 ∈ ℝ)

**Assertion**
Ref	Expression
hoidifhspdmvle	⊢ (𝜑 → (((𝐷‘𝑌)‘𝐴)(𝐿‘𝑋)𝐵) ≤ (𝐴(𝐿‘𝑋)𝐵))

Distinct variable groups: 𝐴,𝑎,𝑏,𝑘 𝐴,𝑐,ℎ,𝑘 𝐵,𝑎,𝑏,𝑘 𝐷,𝑎,𝑏,𝑘 𝐾,𝑐,ℎ,𝑥 𝑋,𝑎,𝑏,𝑘,𝑥 𝑋,𝑐,ℎ 𝑌,𝑎,𝑏,𝑘,𝑥 𝑌,𝑐,ℎ 𝜑,𝑎,𝑏,𝑘,𝑥 𝜑,𝑐,ℎ Allowed substitution hints: 𝐴(𝑥) 𝐵(𝑥,ℎ,𝑐) 𝐷(𝑥,ℎ,𝑐) 𝐾(𝑘,𝑎,𝑏) 𝐿(𝑥,ℎ,𝑘,𝑎,𝑏,𝑐)

**Proof of Theorem hoidifhspdmvle**
Step	Hyp	Ref	Expression
1		nfv 1915	. . 3 ⊢ Ⅎ𝑘𝜑
2		hoidifhspdmvle.x	. . 3 ⊢ (𝜑 → 𝑋 ∈ Fin)
3		hoidifhspdmvle.d	. . . . . 6 ⊢ 𝐷 = (𝑥 ∈ ℝ ↦ (𝑐 ∈ (ℝ ↑_m 𝑋) ↦ (ℎ ∈ 𝑋 ↦ if(ℎ = 𝐾, if(𝑥 ≤ (𝑐‘ℎ), (𝑐‘ℎ), 𝑥), (𝑐‘ℎ)))))
4		hoidifhspdmvle.y	. . . . . 6 ⊢ (𝜑 → 𝑌 ∈ ℝ)
5		hoidifhspdmvle.a	. . . . . 6 ⊢ (𝜑 → 𝐴:𝑋⟶ℝ)
6	3, 4, 2, 5	hoidifhspf 45632	. . . . 5 ⊢ (𝜑 → ((𝐷‘𝑌)‘𝐴):𝑋⟶ℝ)
7	6	ffvelcdmda 7085	. . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑋) → (((𝐷‘𝑌)‘𝐴)‘𝑘) ∈ ℝ)
8		hoidifhspdmvle.b	. . . . 5 ⊢ (𝜑 → 𝐵:𝑋⟶ℝ)
9	8	ffvelcdmda 7085	. . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑋) → (𝐵‘𝑘) ∈ ℝ)
10		volicore 45595	. . . 4 ⊢ (((((𝐷‘𝑌)‘𝐴)‘𝑘) ∈ ℝ ∧ (𝐵‘𝑘) ∈ ℝ) → (vol‘((((𝐷‘𝑌)‘𝐴)‘𝑘)[,)(𝐵‘𝑘))) ∈ ℝ)
11	7, 9, 10	syl2anc 582	. . 3 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑋) → (vol‘((((𝐷‘𝑌)‘𝐴)‘𝑘)[,)(𝐵‘𝑘))) ∈ ℝ)
12	9	rexrd 11268	. . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑋) → (𝐵‘𝑘) ∈ ℝ^*)
13		icombl 25313	. . . . 5 ⊢ (((((𝐷‘𝑌)‘𝐴)‘𝑘) ∈ ℝ ∧ (𝐵‘𝑘) ∈ ℝ^*) → ((((𝐷‘𝑌)‘𝐴)‘𝑘)[,)(𝐵‘𝑘)) ∈ dom vol)
14	7, 12, 13	syl2anc 582	. . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑋) → ((((𝐷‘𝑌)‘𝐴)‘𝑘)[,)(𝐵‘𝑘)) ∈ dom vol)
15		volge0 44975	. . . 4 ⊢ (((((𝐷‘𝑌)‘𝐴)‘𝑘)[,)(𝐵‘𝑘)) ∈ dom vol → 0 ≤ (vol‘((((𝐷‘𝑌)‘𝐴)‘𝑘)[,)(𝐵‘𝑘))))
16	14, 15	syl 17	. . 3 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑋) → 0 ≤ (vol‘((((𝐷‘𝑌)‘𝐴)‘𝑘)[,)(𝐵‘𝑘))))
17	5	ffvelcdmda 7085	. . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑋) → (𝐴‘𝑘) ∈ ℝ)
18		volicore 45595	. . . 4 ⊢ (((𝐴‘𝑘) ∈ ℝ ∧ (𝐵‘𝑘) ∈ ℝ) → (vol‘((𝐴‘𝑘)[,)(𝐵‘𝑘))) ∈ ℝ)
19	17, 9, 18	syl2anc 582	. . 3 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑋) → (vol‘((𝐴‘𝑘)[,)(𝐵‘𝑘))) ∈ ℝ)
20		icombl 25313	. . . . 5 ⊢ (((𝐴‘𝑘) ∈ ℝ ∧ (𝐵‘𝑘) ∈ ℝ^*) → ((𝐴‘𝑘)[,)(𝐵‘𝑘)) ∈ dom vol)
21	17, 12, 20	syl2anc 582	. . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑋) → ((𝐴‘𝑘)[,)(𝐵‘𝑘)) ∈ dom vol)
22	17	rexrd 11268	. . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑋) → (𝐴‘𝑘) ∈ ℝ^*)
23	4	adantr 479	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑋) → 𝑌 ∈ ℝ)
24	23	adantr 479	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑘 ∈ 𝑋) ∧ 𝑘 = 𝐾) → 𝑌 ∈ ℝ)
25	17	adantr 479	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑘 ∈ 𝑋) ∧ 𝑘 = 𝐾) → (𝐴‘𝑘) ∈ ℝ)
26		max2 13170	. . . . . . . 8 ⊢ ((𝑌 ∈ ℝ ∧ (𝐴‘𝑘) ∈ ℝ) → (𝐴‘𝑘) ≤ if(𝑌 ≤ (𝐴‘𝑘), (𝐴‘𝑘), 𝑌))
27	24, 25, 26	syl2anc 582	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑘 ∈ 𝑋) ∧ 𝑘 = 𝐾) → (𝐴‘𝑘) ≤ if(𝑌 ≤ (𝐴‘𝑘), (𝐴‘𝑘), 𝑌))
28	2	adantr 479	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑋) → 𝑋 ∈ Fin)
29	5	adantr 479	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑋) → 𝐴:𝑋⟶ℝ)
30		simpr 483	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑋) → 𝑘 ∈ 𝑋)
31	3, 23, 28, 29, 30	hoidifhspval3 45633	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑋) → (((𝐷‘𝑌)‘𝐴)‘𝑘) = if(𝑘 = 𝐾, if(𝑌 ≤ (𝐴‘𝑘), (𝐴‘𝑘), 𝑌), (𝐴‘𝑘)))
32	31	adantr 479	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑘 ∈ 𝑋) ∧ 𝑘 = 𝐾) → (((𝐷‘𝑌)‘𝐴)‘𝑘) = if(𝑘 = 𝐾, if(𝑌 ≤ (𝐴‘𝑘), (𝐴‘𝑘), 𝑌), (𝐴‘𝑘)))
33		iftrue 4533	. . . . . . . . 9 ⊢ (𝑘 = 𝐾 → if(𝑘 = 𝐾, if(𝑌 ≤ (𝐴‘𝑘), (𝐴‘𝑘), 𝑌), (𝐴‘𝑘)) = if(𝑌 ≤ (𝐴‘𝑘), (𝐴‘𝑘), 𝑌))
34	33	adantl 480	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑘 ∈ 𝑋) ∧ 𝑘 = 𝐾) → if(𝑘 = 𝐾, if(𝑌 ≤ (𝐴‘𝑘), (𝐴‘𝑘), 𝑌), (𝐴‘𝑘)) = if(𝑌 ≤ (𝐴‘𝑘), (𝐴‘𝑘), 𝑌))
35	32, 34	eqtr2d 2771	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑘 ∈ 𝑋) ∧ 𝑘 = 𝐾) → if(𝑌 ≤ (𝐴‘𝑘), (𝐴‘𝑘), 𝑌) = (((𝐷‘𝑌)‘𝐴)‘𝑘))
36	27, 35	breqtrd 5173	. . . . . 6 ⊢ (((𝜑 ∧ 𝑘 ∈ 𝑋) ∧ 𝑘 = 𝐾) → (𝐴‘𝑘) ≤ (((𝐷‘𝑌)‘𝐴)‘𝑘))
37	17	leidd 11784	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑋) → (𝐴‘𝑘) ≤ (𝐴‘𝑘))
38	37	adantr 479	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑘 ∈ 𝑋) ∧ ¬ 𝑘 = 𝐾) → (𝐴‘𝑘) ≤ (𝐴‘𝑘))
39	31	adantr 479	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑘 ∈ 𝑋) ∧ ¬ 𝑘 = 𝐾) → (((𝐷‘𝑌)‘𝐴)‘𝑘) = if(𝑘 = 𝐾, if(𝑌 ≤ (𝐴‘𝑘), (𝐴‘𝑘), 𝑌), (𝐴‘𝑘)))
40		iffalse 4536	. . . . . . . . 9 ⊢ (¬ 𝑘 = 𝐾 → if(𝑘 = 𝐾, if(𝑌 ≤ (𝐴‘𝑘), (𝐴‘𝑘), 𝑌), (𝐴‘𝑘)) = (𝐴‘𝑘))
41	40	adantl 480	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑘 ∈ 𝑋) ∧ ¬ 𝑘 = 𝐾) → if(𝑘 = 𝐾, if(𝑌 ≤ (𝐴‘𝑘), (𝐴‘𝑘), 𝑌), (𝐴‘𝑘)) = (𝐴‘𝑘))
42	39, 41	eqtr2d 2771	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑘 ∈ 𝑋) ∧ ¬ 𝑘 = 𝐾) → (𝐴‘𝑘) = (((𝐷‘𝑌)‘𝐴)‘𝑘))
43	38, 42	breqtrd 5173	. . . . . 6 ⊢ (((𝜑 ∧ 𝑘 ∈ 𝑋) ∧ ¬ 𝑘 = 𝐾) → (𝐴‘𝑘) ≤ (((𝐷‘𝑌)‘𝐴)‘𝑘))
44	36, 43	pm2.61dan 809	. . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑋) → (𝐴‘𝑘) ≤ (((𝐷‘𝑌)‘𝐴)‘𝑘))
45	9	leidd 11784	. . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑋) → (𝐵‘𝑘) ≤ (𝐵‘𝑘))
46		icossico 13398	. . . . 5 ⊢ ((((𝐴‘𝑘) ∈ ℝ^* ∧ (𝐵‘𝑘) ∈ ℝ^*) ∧ ((𝐴‘𝑘) ≤ (((𝐷‘𝑌)‘𝐴)‘𝑘) ∧ (𝐵‘𝑘) ≤ (𝐵‘𝑘))) → ((((𝐷‘𝑌)‘𝐴)‘𝑘)[,)(𝐵‘𝑘)) ⊆ ((𝐴‘𝑘)[,)(𝐵‘𝑘)))
47	22, 12, 44, 45, 46	syl22anc 835	. . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑋) → ((((𝐷‘𝑌)‘𝐴)‘𝑘)[,)(𝐵‘𝑘)) ⊆ ((𝐴‘𝑘)[,)(𝐵‘𝑘)))
48		volss 25282	. . . 4 ⊢ ((((((𝐷‘𝑌)‘𝐴)‘𝑘)[,)(𝐵‘𝑘)) ∈ dom vol ∧ ((𝐴‘𝑘)[,)(𝐵‘𝑘)) ∈ dom vol ∧ ((((𝐷‘𝑌)‘𝐴)‘𝑘)[,)(𝐵‘𝑘)) ⊆ ((𝐴‘𝑘)[,)(𝐵‘𝑘))) → (vol‘((((𝐷‘𝑌)‘𝐴)‘𝑘)[,)(𝐵‘𝑘))) ≤ (vol‘((𝐴‘𝑘)[,)(𝐵‘𝑘))))
49	14, 21, 47, 48	syl3anc 1369	. . 3 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑋) → (vol‘((((𝐷‘𝑌)‘𝐴)‘𝑘)[,)(𝐵‘𝑘))) ≤ (vol‘((𝐴‘𝑘)[,)(𝐵‘𝑘))))
50	1, 2, 11, 16, 19, 49	fprodle 15944	. 2 ⊢ (𝜑 → ∏𝑘 ∈ 𝑋 (vol‘((((𝐷‘𝑌)‘𝐴)‘𝑘)[,)(𝐵‘𝑘))) ≤ ∏𝑘 ∈ 𝑋 (vol‘((𝐴‘𝑘)[,)(𝐵‘𝑘))))
51		hoidifhspdmvle.l	. . . 4 ⊢ 𝐿 = (𝑥 ∈ Fin ↦ (𝑎 ∈ (ℝ ↑_m 𝑥), 𝑏 ∈ (ℝ ↑_m 𝑥) ↦ if(𝑥 = ∅, 0, ∏𝑘 ∈ 𝑥 (vol‘((𝑎‘𝑘)[,)(𝑏‘𝑘))))))
52		hoidifhspdmvle.k	. . . . 5 ⊢ (𝜑 → 𝐾 ∈ 𝑋)
53	52	ne0d 4334	. . . 4 ⊢ (𝜑 → 𝑋 ≠ ∅)
54	51, 2, 53, 6, 8	hoidmvn0val 45598	. . 3 ⊢ (𝜑 → (((𝐷‘𝑌)‘𝐴)(𝐿‘𝑋)𝐵) = ∏𝑘 ∈ 𝑋 (vol‘((((𝐷‘𝑌)‘𝐴)‘𝑘)[,)(𝐵‘𝑘))))
55	51, 2, 53, 5, 8	hoidmvn0val 45598	. . 3 ⊢ (𝜑 → (𝐴(𝐿‘𝑋)𝐵) = ∏𝑘 ∈ 𝑋 (vol‘((𝐴‘𝑘)[,)(𝐵‘𝑘))))
56	54, 55	breq12d 5160	. 2 ⊢ (𝜑 → ((((𝐷‘𝑌)‘𝐴)(𝐿‘𝑋)𝐵) ≤ (𝐴(𝐿‘𝑋)𝐵) ↔ ∏𝑘 ∈ 𝑋 (vol‘((((𝐷‘𝑌)‘𝐴)‘𝑘)[,)(𝐵‘𝑘))) ≤ ∏𝑘 ∈ 𝑋 (vol‘((𝐴‘𝑘)[,)(𝐵‘𝑘)))))
57	50, 56	mpbird 256	1 ⊢ (𝜑 → (((𝐷‘𝑌)‘𝐴)(𝐿‘𝑋)𝐵) ≤ (𝐴(𝐿‘𝑋)𝐵))

Colors of variables: wff setvar class

Syntax hints: ¬ wn 3 → wi 4 ∧ wa 394 = wceq 1539 ∈ wcel 2104 ⊆ wss 3947 ∅c0 4321 ifcif 4527 class class class wbr 5147 ↦ cmpt 5230 dom cdm 5675 ⟶wf 6538 ‘cfv 6542 (class class class)co 7411 ∈ cmpo 7413 ↑_m cmap 8822 Fincfn 8941 ℝcr 11111 0cc0 11112 ℝ^*cxr 11251 ≤ cle 11253 [,)cico 13330 ∏cprod 15853 volcvol 25212

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1911 ax-6 1969 ax-7 2009 ax-8 2106 ax-9 2114 ax-10 2135 ax-11 2152 ax-12 2169 ax-ext 2701 ax-rep 5284 ax-sep 5298 ax-nul 5305 ax-pow 5362 ax-pr 5426 ax-un 7727 ax-inf2 9638 ax-cnex 11168 ax-resscn 11169 ax-1cn 11170 ax-icn 11171 ax-addcl 11172 ax-addrcl 11173 ax-mulcl 11174 ax-mulrcl 11175 ax-mulcom 11176 ax-addass 11177 ax-mulass 11178 ax-distr 11179 ax-i2m1 11180 ax-1ne0 11181 ax-1rid 11182 ax-rnegex 11183 ax-rrecex 11184 ax-cnre 11185 ax-pre-lttri 11186 ax-pre-lttrn 11187 ax-pre-ltadd 11188 ax-pre-mulgt0 11189 ax-pre-sup 11190

This theorem depends on definitions: df-bi 206 df-an 395 df-or 844 df-3or 1086 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2532 df-eu 2561 df-clab 2708 df-cleq 2722 df-clel 2808 df-nfc 2883 df-ne 2939 df-nel 3045 df-ral 3060 df-rex 3069 df-rmo 3374 df-reu 3375 df-rab 3431 df-v 3474 df-sbc 3777 df-csb 3893 df-dif 3950 df-un 3952 df-in 3954 df-ss 3964 df-pss 3966 df-nul 4322 df-if 4528 df-pw 4603 df-sn 4628 df-pr 4630 df-op 4634 df-uni 4908 df-int 4950 df-iun 4998 df-br 5148 df-opab 5210 df-mpt 5231 df-tr 5265 df-id 5573 df-eprel 5579 df-po 5587 df-so 5588 df-fr 5630 df-se 5631 df-we 5632 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-pred 6299 df-ord 6366 df-on 6367 df-lim 6368 df-suc 6369 df-iota 6494 df-fun 6544 df-fn 6545 df-f 6546 df-f1 6547 df-fo 6548 df-f1o 6549 df-fv 6550 df-isom 6551 df-riota 7367 df-ov 7414 df-oprab 7415 df-mpo 7416 df-of 7672 df-om 7858 df-1st 7977 df-2nd 7978 df-frecs 8268 df-wrecs 8299 df-recs 8373 df-rdg 8412 df-1o 8468 df-2o 8469 df-er 8705 df-map 8824 df-pm 8825 df-en 8942 df-dom 8943 df-sdom 8944 df-fin 8945 df-fi 9408 df-sup 9439 df-inf 9440 df-oi 9507 df-dju 9898 df-card 9936 df-pnf 11254 df-mnf 11255 df-xr 11256 df-ltxr 11257 df-le 11258 df-sub 11450 df-neg 11451 df-div 11876 df-nn 12217 df-2 12279 df-3 12280 df-n0 12477 df-z 12563 df-uz 12827 df-q 12937 df-rp 12979 df-xneg 13096 df-xadd 13097 df-xmul 13098 df-ioo 13332 df-ico 13334 df-icc 13335 df-fz 13489 df-fzo 13632 df-fl 13761 df-seq 13971 df-exp 14032 df-hash 14295 df-cj 15050 df-re 15051 df-im 15052 df-sqrt 15186 df-abs 15187 df-clim 15436 df-rlim 15437 df-sum 15637 df-prod 15854 df-rest 17372 df-topgen 17393 df-psmet 21136 df-xmet 21137 df-met 21138 df-bl 21139 df-mopn 21140 df-top 22616 df-topon 22633 df-bases 22669 df-cmp 23111 df-ovol 25213 df-vol 25214

This theorem is referenced by: hspmbllem2 45641

W3C validator