iccpartiun - Mathbox for Alexander van der Vekens

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Theorem iccpartiun 46400

Description: A half-open interval of extended reals is the union of the parts of its partition. (Contributed by AV, 18-Jul-2020.)

**Hypotheses**
Ref	Expression
iccpartiun.m	⊢ (𝜑 → 𝑀 ∈ ℕ)
iccpartiun.p	⊢ (𝜑 → 𝑃 ∈ (RePart‘𝑀))

**Assertion**
Ref	Expression
iccpartiun	⊢ (𝜑 → ((𝑃‘0)[,)(𝑃‘𝑀)) = ∪ 𝑖 ∈ (0..^𝑀)((𝑃‘𝑖)[,)(𝑃‘(𝑖 + 1))))

Distinct variable groups: 𝑖,𝑀 𝑃,𝑖 𝜑,𝑖

Proof of Theorem iccpartiun Dummy variables 𝑗 𝑘 𝑝 𝑥 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		iccpartiun.p	. . . . 5 ⊢ (𝜑 → 𝑃 ∈ (RePart‘𝑀))
2		iccpartiun.m	. . . . . 6 ⊢ (𝜑 → 𝑀 ∈ ℕ)
3		iccelpart 46399	. . . . . 6 ⊢ (𝑀 ∈ ℕ → ∀𝑝 ∈ (RePart‘𝑀)(𝑥 ∈ ((𝑝‘0)[,)(𝑝‘𝑀)) → ∃𝑖 ∈ (0..^𝑀)𝑥 ∈ ((𝑝‘𝑖)[,)(𝑝‘(𝑖 + 1)))))
4		fveq1 6889	. . . . . . . . . . 11 ⊢ (𝑝 = 𝑃 → (𝑝‘0) = (𝑃‘0))
5		fveq1 6889	. . . . . . . . . . 11 ⊢ (𝑝 = 𝑃 → (𝑝‘𝑀) = (𝑃‘𝑀))
6	4, 5	oveq12d 7429	. . . . . . . . . 10 ⊢ (𝑝 = 𝑃 → ((𝑝‘0)[,)(𝑝‘𝑀)) = ((𝑃‘0)[,)(𝑃‘𝑀)))
7	6	eleq2d 2817	. . . . . . . . 9 ⊢ (𝑝 = 𝑃 → (𝑥 ∈ ((𝑝‘0)[,)(𝑝‘𝑀)) ↔ 𝑥 ∈ ((𝑃‘0)[,)(𝑃‘𝑀))))
8		fveq1 6889	. . . . . . . . . . . 12 ⊢ (𝑝 = 𝑃 → (𝑝‘𝑖) = (𝑃‘𝑖))
9		fveq1 6889	. . . . . . . . . . . 12 ⊢ (𝑝 = 𝑃 → (𝑝‘(𝑖 + 1)) = (𝑃‘(𝑖 + 1)))
10	8, 9	oveq12d 7429	. . . . . . . . . . 11 ⊢ (𝑝 = 𝑃 → ((𝑝‘𝑖)[,)(𝑝‘(𝑖 + 1))) = ((𝑃‘𝑖)[,)(𝑃‘(𝑖 + 1))))
11	10	eleq2d 2817	. . . . . . . . . 10 ⊢ (𝑝 = 𝑃 → (𝑥 ∈ ((𝑝‘𝑖)[,)(𝑝‘(𝑖 + 1))) ↔ 𝑥 ∈ ((𝑃‘𝑖)[,)(𝑃‘(𝑖 + 1)))))
12	11	rexbidv 3176	. . . . . . . . 9 ⊢ (𝑝 = 𝑃 → (∃𝑖 ∈ (0..^𝑀)𝑥 ∈ ((𝑝‘𝑖)[,)(𝑝‘(𝑖 + 1))) ↔ ∃𝑖 ∈ (0..^𝑀)𝑥 ∈ ((𝑃‘𝑖)[,)(𝑃‘(𝑖 + 1)))))
13	7, 12	imbi12d 343	. . . . . . . 8 ⊢ (𝑝 = 𝑃 → ((𝑥 ∈ ((𝑝‘0)[,)(𝑝‘𝑀)) → ∃𝑖 ∈ (0..^𝑀)𝑥 ∈ ((𝑝‘𝑖)[,)(𝑝‘(𝑖 + 1)))) ↔ (𝑥 ∈ ((𝑃‘0)[,)(𝑃‘𝑀)) → ∃𝑖 ∈ (0..^𝑀)𝑥 ∈ ((𝑃‘𝑖)[,)(𝑃‘(𝑖 + 1))))))
14	13	rspcva 3609	. . . . . . 7 ⊢ ((𝑃 ∈ (RePart‘𝑀) ∧ ∀𝑝 ∈ (RePart‘𝑀)(𝑥 ∈ ((𝑝‘0)[,)(𝑝‘𝑀)) → ∃𝑖 ∈ (0..^𝑀)𝑥 ∈ ((𝑝‘𝑖)[,)(𝑝‘(𝑖 + 1))))) → (𝑥 ∈ ((𝑃‘0)[,)(𝑃‘𝑀)) → ∃𝑖 ∈ (0..^𝑀)𝑥 ∈ ((𝑃‘𝑖)[,)(𝑃‘(𝑖 + 1)))))
15	14	expcom 412	. . . . . 6 ⊢ (∀𝑝 ∈ (RePart‘𝑀)(𝑥 ∈ ((𝑝‘0)[,)(𝑝‘𝑀)) → ∃𝑖 ∈ (0..^𝑀)𝑥 ∈ ((𝑝‘𝑖)[,)(𝑝‘(𝑖 + 1)))) → (𝑃 ∈ (RePart‘𝑀) → (𝑥 ∈ ((𝑃‘0)[,)(𝑃‘𝑀)) → ∃𝑖 ∈ (0..^𝑀)𝑥 ∈ ((𝑃‘𝑖)[,)(𝑃‘(𝑖 + 1))))))
16	2, 3, 15	3syl 18	. . . . 5 ⊢ (𝜑 → (𝑃 ∈ (RePart‘𝑀) → (𝑥 ∈ ((𝑃‘0)[,)(𝑃‘𝑀)) → ∃𝑖 ∈ (0..^𝑀)𝑥 ∈ ((𝑃‘𝑖)[,)(𝑃‘(𝑖 + 1))))))
17	1, 16	mpd 15	. . . 4 ⊢ (𝜑 → (𝑥 ∈ ((𝑃‘0)[,)(𝑃‘𝑀)) → ∃𝑖 ∈ (0..^𝑀)𝑥 ∈ ((𝑃‘𝑖)[,)(𝑃‘(𝑖 + 1)))))
18		nnnn0 12483	. . . . . . . . . . 11 ⊢ (𝑀 ∈ ℕ → 𝑀 ∈ ℕ₀)
19		0elfz 13602	. . . . . . . . . . 11 ⊢ (𝑀 ∈ ℕ₀ → 0 ∈ (0...𝑀))
20	2, 18, 19	3syl 18	. . . . . . . . . 10 ⊢ (𝜑 → 0 ∈ (0...𝑀))
21	2, 1, 20	iccpartxr 46385	. . . . . . . . 9 ⊢ (𝜑 → (𝑃‘0) ∈ ℝ^*)
22		nn0fz0 13603	. . . . . . . . . . . 12 ⊢ (𝑀 ∈ ℕ₀ ↔ 𝑀 ∈ (0...𝑀))
23	22	biimpi 215	. . . . . . . . . . 11 ⊢ (𝑀 ∈ ℕ₀ → 𝑀 ∈ (0...𝑀))
24	2, 18, 23	3syl 18	. . . . . . . . . 10 ⊢ (𝜑 → 𝑀 ∈ (0...𝑀))
25	2, 1, 24	iccpartxr 46385	. . . . . . . . 9 ⊢ (𝜑 → (𝑃‘𝑀) ∈ ℝ^*)
26	21, 25	jca 510	. . . . . . . 8 ⊢ (𝜑 → ((𝑃‘0) ∈ ℝ^* ∧ (𝑃‘𝑀) ∈ ℝ^*))
27	26	adantr 479	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑖 ∈ (0..^𝑀)) → ((𝑃‘0) ∈ ℝ^* ∧ (𝑃‘𝑀) ∈ ℝ^*))
28		elfzofz 13652	. . . . . . . 8 ⊢ (𝑖 ∈ (0..^𝑀) → 𝑖 ∈ (0...𝑀))
29	2, 1	iccpartgel 46395	. . . . . . . 8 ⊢ (𝜑 → ∀𝑗 ∈ (0...𝑀)(𝑃‘0) ≤ (𝑃‘𝑗))
30		fveq2 6890	. . . . . . . . . 10 ⊢ (𝑗 = 𝑖 → (𝑃‘𝑗) = (𝑃‘𝑖))
31	30	breq2d 5159	. . . . . . . . 9 ⊢ (𝑗 = 𝑖 → ((𝑃‘0) ≤ (𝑃‘𝑗) ↔ (𝑃‘0) ≤ (𝑃‘𝑖)))
32	31	rspcva 3609	. . . . . . . 8 ⊢ ((𝑖 ∈ (0...𝑀) ∧ ∀𝑗 ∈ (0...𝑀)(𝑃‘0) ≤ (𝑃‘𝑗)) → (𝑃‘0) ≤ (𝑃‘𝑖))
33	28, 29, 32	syl2anr 595	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑖 ∈ (0..^𝑀)) → (𝑃‘0) ≤ (𝑃‘𝑖))
34		fzofzp1 13733	. . . . . . . 8 ⊢ (𝑖 ∈ (0..^𝑀) → (𝑖 + 1) ∈ (0...𝑀))
35	2, 1	iccpartleu 46394	. . . . . . . 8 ⊢ (𝜑 → ∀𝑘 ∈ (0...𝑀)(𝑃‘𝑘) ≤ (𝑃‘𝑀))
36		fveq2 6890	. . . . . . . . . 10 ⊢ (𝑘 = (𝑖 + 1) → (𝑃‘𝑘) = (𝑃‘(𝑖 + 1)))
37	36	breq1d 5157	. . . . . . . . 9 ⊢ (𝑘 = (𝑖 + 1) → ((𝑃‘𝑘) ≤ (𝑃‘𝑀) ↔ (𝑃‘(𝑖 + 1)) ≤ (𝑃‘𝑀)))
38	37	rspcva 3609	. . . . . . . 8 ⊢ (((𝑖 + 1) ∈ (0...𝑀) ∧ ∀𝑘 ∈ (0...𝑀)(𝑃‘𝑘) ≤ (𝑃‘𝑀)) → (𝑃‘(𝑖 + 1)) ≤ (𝑃‘𝑀))
39	34, 35, 38	syl2anr 595	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑖 ∈ (0..^𝑀)) → (𝑃‘(𝑖 + 1)) ≤ (𝑃‘𝑀))
40		icossico 13398	. . . . . . 7 ⊢ ((((𝑃‘0) ∈ ℝ^* ∧ (𝑃‘𝑀) ∈ ℝ^*) ∧ ((𝑃‘0) ≤ (𝑃‘𝑖) ∧ (𝑃‘(𝑖 + 1)) ≤ (𝑃‘𝑀))) → ((𝑃‘𝑖)[,)(𝑃‘(𝑖 + 1))) ⊆ ((𝑃‘0)[,)(𝑃‘𝑀)))
41	27, 33, 39, 40	syl12anc 833	. . . . . 6 ⊢ ((𝜑 ∧ 𝑖 ∈ (0..^𝑀)) → ((𝑃‘𝑖)[,)(𝑃‘(𝑖 + 1))) ⊆ ((𝑃‘0)[,)(𝑃‘𝑀)))
42	41	sseld 3980	. . . . 5 ⊢ ((𝜑 ∧ 𝑖 ∈ (0..^𝑀)) → (𝑥 ∈ ((𝑃‘𝑖)[,)(𝑃‘(𝑖 + 1))) → 𝑥 ∈ ((𝑃‘0)[,)(𝑃‘𝑀))))
43	42	rexlimdva 3153	. . . 4 ⊢ (𝜑 → (∃𝑖 ∈ (0..^𝑀)𝑥 ∈ ((𝑃‘𝑖)[,)(𝑃‘(𝑖 + 1))) → 𝑥 ∈ ((𝑃‘0)[,)(𝑃‘𝑀))))
44	17, 43	impbid 211	. . 3 ⊢ (𝜑 → (𝑥 ∈ ((𝑃‘0)[,)(𝑃‘𝑀)) ↔ ∃𝑖 ∈ (0..^𝑀)𝑥 ∈ ((𝑃‘𝑖)[,)(𝑃‘(𝑖 + 1)))))
45		eliun 5000	. . 3 ⊢ (𝑥 ∈ ∪ 𝑖 ∈ (0..^𝑀)((𝑃‘𝑖)[,)(𝑃‘(𝑖 + 1))) ↔ ∃𝑖 ∈ (0..^𝑀)𝑥 ∈ ((𝑃‘𝑖)[,)(𝑃‘(𝑖 + 1))))
46	44, 45	bitr4di 288	. 2 ⊢ (𝜑 → (𝑥 ∈ ((𝑃‘0)[,)(𝑃‘𝑀)) ↔ 𝑥 ∈ ∪ 𝑖 ∈ (0..^𝑀)((𝑃‘𝑖)[,)(𝑃‘(𝑖 + 1)))))
47	46	eqrdv 2728	1 ⊢ (𝜑 → ((𝑃‘0)[,)(𝑃‘𝑀)) = ∪ 𝑖 ∈ (0..^𝑀)((𝑃‘𝑖)[,)(𝑃‘(𝑖 + 1))))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ∧ wa 394 = wceq 1539 ∈ wcel 2104 ∀wral 3059 ∃wrex 3068 ⊆ wss 3947 ∪ ciun 4996 class class class wbr 5147 ‘cfv 6542 (class class class)co 7411 0cc0 11112 1c1 11113 + caddc 11115 ℝ^*cxr 11251 ≤ cle 11253 ℕcn 12216 ℕ₀cn0 12476 [,)cico 13330 ...cfz 13488 ..^cfzo 13631 RePartciccp 46379

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-sep 5298 ax-nul 5305 ax-pow 5362 ax-pr 5426 ax-un 7727 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

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-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-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-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-riota 7367 df-ov 7414 df-oprab 7415 df-mpo 7416 df-om 7858 df-1st 7977 df-2nd 7978 df-frecs 8268 df-wrecs 8299 df-recs 8373 df-rdg 8412 df-er 8705 df-map 8824 df-en 8942 df-dom 8943 df-sdom 8944 df-pnf 11254 df-mnf 11255 df-xr 11256 df-ltxr 11257 df-le 11258 df-sub 11450 df-neg 11451 df-nn 12217 df-2 12279 df-n0 12477 df-z 12563 df-uz 12827 df-ico 13334 df-fz 13489 df-fzo 13632 df-iccp 46380

This theorem is referenced by: (None)

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