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Theorem ovolunlem1a 24099

Description: Lemma for ovolun 24102. (Contributed by Mario Carneiro, 7-May-2015.)

**Hypotheses**
Ref	Expression
ovolun.a	⊢ (𝜑 → (𝐴 ⊆ ℝ ∧ (vol*‘𝐴) ∈ ℝ))
ovolun.b	⊢ (𝜑 → (𝐵 ⊆ ℝ ∧ (vol*‘𝐵) ∈ ℝ))
ovolun.c	⊢ (𝜑 → 𝐶 ∈ ℝ⁺)
ovolun.s	⊢ 𝑆 = seq1( + , ((abs ∘ − ) ∘ 𝐹))
ovolun.t	⊢ 𝑇 = seq1( + , ((abs ∘ − ) ∘ 𝐺))
ovolun.u	⊢ 𝑈 = seq1( + , ((abs ∘ − ) ∘ 𝐻))
ovolun.f1	⊢ (𝜑 → 𝐹 ∈ (( ≤ ∩ (ℝ × ℝ)) ↑_m ℕ))
ovolun.f2	⊢ (𝜑 → 𝐴 ⊆ ∪ ran ((,) ∘ 𝐹))
ovolun.f3	⊢ (𝜑 → sup(ran 𝑆, ℝ^, < ) ≤ ((vol‘𝐴) + (𝐶 / 2)))
ovolun.g1	⊢ (𝜑 → 𝐺 ∈ (( ≤ ∩ (ℝ × ℝ)) ↑_m ℕ))
ovolun.g2	⊢ (𝜑 → 𝐵 ⊆ ∪ ran ((,) ∘ 𝐺))
ovolun.g3	⊢ (𝜑 → sup(ran 𝑇, ℝ^, < ) ≤ ((vol‘𝐵) + (𝐶 / 2)))
ovolun.h	⊢ 𝐻 = (𝑛 ∈ ℕ ↦ if((𝑛 / 2) ∈ ℕ, (𝐺‘(𝑛 / 2)), (𝐹‘((𝑛 + 1) / 2))))

**Assertion**
Ref	Expression
ovolunlem1a	⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (𝑈‘𝑘) ≤ (((vol‘𝐴) + (vol‘𝐵)) + 𝐶))

Distinct variable groups: 𝑘,𝑛,𝐶 𝑘,𝐹,𝑛 𝑘,𝐻 𝐴,𝑘,𝑛 𝐵,𝑘,𝑛 𝑆,𝑘 𝑇,𝑘 𝑘,𝐺,𝑛 𝜑,𝑘,𝑛 𝑈,𝑘 Allowed substitution hints: 𝑆(𝑛) 𝑇(𝑛) 𝑈(𝑛) 𝐻(𝑛)

Proof of Theorem ovolunlem1a Dummy variables 𝑧 𝑗 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		ovolun.g1	. . . . . . . . . 10 ⊢ (𝜑 → 𝐺 ∈ (( ≤ ∩ (ℝ × ℝ)) ↑_m ℕ))
2		elovolmlem 24077	. . . . . . . . . 10 ⊢ (𝐺 ∈ (( ≤ ∩ (ℝ × ℝ)) ↑_m ℕ) ↔ 𝐺:ℕ⟶( ≤ ∩ (ℝ × ℝ)))
3	1, 2	sylib 220	. . . . . . . . 9 ⊢ (𝜑 → 𝐺:ℕ⟶( ≤ ∩ (ℝ × ℝ)))
4	3	adantr 483	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑛 ∈ ℕ) → 𝐺:ℕ⟶( ≤ ∩ (ℝ × ℝ)))
5	4	ffvelrnda 6853	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ (𝑛 / 2) ∈ ℕ) → (𝐺‘(𝑛 / 2)) ∈ ( ≤ ∩ (ℝ × ℝ)))
6		nneo 12069	. . . . . . . . . . 11 ⊢ (𝑛 ∈ ℕ → ((𝑛 / 2) ∈ ℕ ↔ ¬ ((𝑛 + 1) / 2) ∈ ℕ))
7	6	adantl 484	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑛 ∈ ℕ) → ((𝑛 / 2) ∈ ℕ ↔ ¬ ((𝑛 + 1) / 2) ∈ ℕ))
8	7	con2bid 357	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑛 ∈ ℕ) → (((𝑛 + 1) / 2) ∈ ℕ ↔ ¬ (𝑛 / 2) ∈ ℕ))
9	8	biimpar 480	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ ¬ (𝑛 / 2) ∈ ℕ) → ((𝑛 + 1) / 2) ∈ ℕ)
10		ovolun.f1	. . . . . . . . . . 11 ⊢ (𝜑 → 𝐹 ∈ (( ≤ ∩ (ℝ × ℝ)) ↑_m ℕ))
11		elovolmlem 24077	. . . . . . . . . . 11 ⊢ (𝐹 ∈ (( ≤ ∩ (ℝ × ℝ)) ↑_m ℕ) ↔ 𝐹:ℕ⟶( ≤ ∩ (ℝ × ℝ)))
12	10, 11	sylib 220	. . . . . . . . . 10 ⊢ (𝜑 → 𝐹:ℕ⟶( ≤ ∩ (ℝ × ℝ)))
13	12	adantr 483	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑛 ∈ ℕ) → 𝐹:ℕ⟶( ≤ ∩ (ℝ × ℝ)))
14	13	ffvelrnda 6853	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ ((𝑛 + 1) / 2) ∈ ℕ) → (𝐹‘((𝑛 + 1) / 2)) ∈ ( ≤ ∩ (ℝ × ℝ)))
15	9, 14	syldan 593	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ ¬ (𝑛 / 2) ∈ ℕ) → (𝐹‘((𝑛 + 1) / 2)) ∈ ( ≤ ∩ (ℝ × ℝ)))
16	5, 15	ifclda 4503	. . . . . 6 ⊢ ((𝜑 ∧ 𝑛 ∈ ℕ) → if((𝑛 / 2) ∈ ℕ, (𝐺‘(𝑛 / 2)), (𝐹‘((𝑛 + 1) / 2))) ∈ ( ≤ ∩ (ℝ × ℝ)))
17		ovolun.h	. . . . . 6 ⊢ 𝐻 = (𝑛 ∈ ℕ ↦ if((𝑛 / 2) ∈ ℕ, (𝐺‘(𝑛 / 2)), (𝐹‘((𝑛 + 1) / 2))))
18	16, 17	fmptd 6880	. . . . 5 ⊢ (𝜑 → 𝐻:ℕ⟶( ≤ ∩ (ℝ × ℝ)))
19		eqid 2823	. . . . . 6 ⊢ ((abs ∘ − ) ∘ 𝐻) = ((abs ∘ − ) ∘ 𝐻)
20		ovolun.u	. . . . . 6 ⊢ 𝑈 = seq1( + , ((abs ∘ − ) ∘ 𝐻))
21	19, 20	ovolsf 24075	. . . . 5 ⊢ (𝐻:ℕ⟶( ≤ ∩ (ℝ × ℝ)) → 𝑈:ℕ⟶(0[,)+∞))
22	18, 21	syl 17	. . . 4 ⊢ (𝜑 → 𝑈:ℕ⟶(0[,)+∞))
23		rge0ssre 12847	. . . 4 ⊢ (0[,)+∞) ⊆ ℝ
24		fss 6529	. . . 4 ⊢ ((𝑈:ℕ⟶(0[,)+∞) ∧ (0[,)+∞) ⊆ ℝ) → 𝑈:ℕ⟶ℝ)
25	22, 23, 24	sylancl 588	. . 3 ⊢ (𝜑 → 𝑈:ℕ⟶ℝ)
26	25	ffvelrnda 6853	. 2 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (𝑈‘𝑘) ∈ ℝ)
27		2nn 11713	. . . 4 ⊢ 2 ∈ ℕ
28		peano2nn 11652	. . . . . . . . 9 ⊢ (𝑘 ∈ ℕ → (𝑘 + 1) ∈ ℕ)
29	28	adantl 484	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (𝑘 + 1) ∈ ℕ)
30	29	nnred 11655	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (𝑘 + 1) ∈ ℝ)
31	30	rehalfcld 11887	. . . . . 6 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → ((𝑘 + 1) / 2) ∈ ℝ)
32	31	flcld 13171	. . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (⌊‘((𝑘 + 1) / 2)) ∈ ℤ)
33		ax-1cn 10597	. . . . . . . . 9 ⊢ 1 ∈ ℂ
34	33	2timesi 11778	. . . . . . . 8 ⊢ (2 · 1) = (1 + 1)
35		nnge1 11668	. . . . . . . . . 10 ⊢ (𝑘 ∈ ℕ → 1 ≤ 𝑘)
36	35	adantl 484	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → 1 ≤ 𝑘)
37		nnre 11647	. . . . . . . . . . 11 ⊢ (𝑘 ∈ ℕ → 𝑘 ∈ ℝ)
38	37	adantl 484	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → 𝑘 ∈ ℝ)
39		1re 10643	. . . . . . . . . . 11 ⊢ 1 ∈ ℝ
40		leadd1 11110	. . . . . . . . . . 11 ⊢ ((1 ∈ ℝ ∧ 𝑘 ∈ ℝ ∧ 1 ∈ ℝ) → (1 ≤ 𝑘 ↔ (1 + 1) ≤ (𝑘 + 1)))
41	39, 39, 40	mp3an13 1448	. . . . . . . . . 10 ⊢ (𝑘 ∈ ℝ → (1 ≤ 𝑘 ↔ (1 + 1) ≤ (𝑘 + 1)))
42	38, 41	syl 17	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (1 ≤ 𝑘 ↔ (1 + 1) ≤ (𝑘 + 1)))
43	36, 42	mpbid 234	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (1 + 1) ≤ (𝑘 + 1))
44	34, 43	eqbrtrid 5103	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (2 · 1) ≤ (𝑘 + 1))
45		2re 11714	. . . . . . . . . 10 ⊢ 2 ∈ ℝ
46		2pos 11743	. . . . . . . . . 10 ⊢ 0 < 2
47	45, 46	pm3.2i 473	. . . . . . . . 9 ⊢ (2 ∈ ℝ ∧ 0 < 2)
48		lemuldiv2 11523	. . . . . . . . 9 ⊢ ((1 ∈ ℝ ∧ (𝑘 + 1) ∈ ℝ ∧ (2 ∈ ℝ ∧ 0 < 2)) → ((2 · 1) ≤ (𝑘 + 1) ↔ 1 ≤ ((𝑘 + 1) / 2)))
49	39, 47, 48	mp3an13 1448	. . . . . . . 8 ⊢ ((𝑘 + 1) ∈ ℝ → ((2 · 1) ≤ (𝑘 + 1) ↔ 1 ≤ ((𝑘 + 1) / 2)))
50	30, 49	syl 17	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → ((2 · 1) ≤ (𝑘 + 1) ↔ 1 ≤ ((𝑘 + 1) / 2)))
51	44, 50	mpbid 234	. . . . . 6 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → 1 ≤ ((𝑘 + 1) / 2))
52		1z 12015	. . . . . . 7 ⊢ 1 ∈ ℤ
53		flge 13178	. . . . . . 7 ⊢ ((((𝑘 + 1) / 2) ∈ ℝ ∧ 1 ∈ ℤ) → (1 ≤ ((𝑘 + 1) / 2) ↔ 1 ≤ (⌊‘((𝑘 + 1) / 2))))
54	31, 52, 53	sylancl 588	. . . . . 6 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (1 ≤ ((𝑘 + 1) / 2) ↔ 1 ≤ (⌊‘((𝑘 + 1) / 2))))
55	51, 54	mpbid 234	. . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → 1 ≤ (⌊‘((𝑘 + 1) / 2)))
56		elnnz1 12011	. . . . 5 ⊢ ((⌊‘((𝑘 + 1) / 2)) ∈ ℕ ↔ ((⌊‘((𝑘 + 1) / 2)) ∈ ℤ ∧ 1 ≤ (⌊‘((𝑘 + 1) / 2))))
57	32, 55, 56	sylanbrc 585	. . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (⌊‘((𝑘 + 1) / 2)) ∈ ℕ)
58		nnmulcl 11664	. . . 4 ⊢ ((2 ∈ ℕ ∧ (⌊‘((𝑘 + 1) / 2)) ∈ ℕ) → (2 · (⌊‘((𝑘 + 1) / 2))) ∈ ℕ)
59	27, 57, 58	sylancr 589	. . 3 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (2 · (⌊‘((𝑘 + 1) / 2))) ∈ ℕ)
60	25	ffvelrnda 6853	. . 3 ⊢ ((𝜑 ∧ (2 · (⌊‘((𝑘 + 1) / 2))) ∈ ℕ) → (𝑈‘(2 · (⌊‘((𝑘 + 1) / 2)))) ∈ ℝ)
61	59, 60	syldan 593	. 2 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (𝑈‘(2 · (⌊‘((𝑘 + 1) / 2)))) ∈ ℝ)
62		ovolun.a	. . . . . 6 ⊢ (𝜑 → (𝐴 ⊆ ℝ ∧ (vol*‘𝐴) ∈ ℝ))
63	62	simprd 498	. . . . 5 ⊢ (𝜑 → (vol*‘𝐴) ∈ ℝ)
64		ovolun.b	. . . . . 6 ⊢ (𝜑 → (𝐵 ⊆ ℝ ∧ (vol*‘𝐵) ∈ ℝ))
65	64	simprd 498	. . . . 5 ⊢ (𝜑 → (vol*‘𝐵) ∈ ℝ)
66	63, 65	readdcld 10672	. . . 4 ⊢ (𝜑 → ((vol‘𝐴) + (vol‘𝐵)) ∈ ℝ)
67		ovolun.c	. . . . 5 ⊢ (𝜑 → 𝐶 ∈ ℝ⁺)
68	67	rpred 12434	. . . 4 ⊢ (𝜑 → 𝐶 ∈ ℝ)
69	66, 68	readdcld 10672	. . 3 ⊢ (𝜑 → (((vol‘𝐴) + (vol‘𝐵)) + 𝐶) ∈ ℝ)
70	69	adantr 483	. 2 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (((vol‘𝐴) + (vol‘𝐵)) + 𝐶) ∈ ℝ)
71		simpr 487	. . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → 𝑘 ∈ ℕ)
72		nnuz 12284	. . . . 5 ⊢ ℕ = (ℤ_≥‘1)
73	71, 72	eleqtrdi 2925	. . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → 𝑘 ∈ (ℤ_≥‘1))
74		nnz 12007	. . . . . . 7 ⊢ (𝑘 ∈ ℕ → 𝑘 ∈ ℤ)
75	74	adantl 484	. . . . . 6 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → 𝑘 ∈ ℤ)
76		flhalf 13203	. . . . . 6 ⊢ (𝑘 ∈ ℤ → 𝑘 ≤ (2 · (⌊‘((𝑘 + 1) / 2))))
77	75, 76	syl 17	. . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → 𝑘 ≤ (2 · (⌊‘((𝑘 + 1) / 2))))
78		nnz 12007	. . . . . . 7 ⊢ ((2 · (⌊‘((𝑘 + 1) / 2))) ∈ ℕ → (2 · (⌊‘((𝑘 + 1) / 2))) ∈ ℤ)
79		eluz 12260	. . . . . . 7 ⊢ ((𝑘 ∈ ℤ ∧ (2 · (⌊‘((𝑘 + 1) / 2))) ∈ ℤ) → ((2 · (⌊‘((𝑘 + 1) / 2))) ∈ (ℤ_≥‘𝑘) ↔ 𝑘 ≤ (2 · (⌊‘((𝑘 + 1) / 2)))))
80	74, 78, 79	syl2an 597	. . . . . 6 ⊢ ((𝑘 ∈ ℕ ∧ (2 · (⌊‘((𝑘 + 1) / 2))) ∈ ℕ) → ((2 · (⌊‘((𝑘 + 1) / 2))) ∈ (ℤ_≥‘𝑘) ↔ 𝑘 ≤ (2 · (⌊‘((𝑘 + 1) / 2)))))
81	71, 59, 80	syl2anc 586	. . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → ((2 · (⌊‘((𝑘 + 1) / 2))) ∈ (ℤ_≥‘𝑘) ↔ 𝑘 ≤ (2 · (⌊‘((𝑘 + 1) / 2)))))
82	77, 81	mpbird 259	. . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (2 · (⌊‘((𝑘 + 1) / 2))) ∈ (ℤ_≥‘𝑘))
83		elfznn 12939	. . . . 5 ⊢ (𝑗 ∈ (1...(2 · (⌊‘((𝑘 + 1) / 2)))) → 𝑗 ∈ ℕ)
84	19	ovolfsf 24074	. . . . . . . . . 10 ⊢ (𝐻:ℕ⟶( ≤ ∩ (ℝ × ℝ)) → ((abs ∘ − ) ∘ 𝐻):ℕ⟶(0[,)+∞))
85	18, 84	syl 17	. . . . . . . . 9 ⊢ (𝜑 → ((abs ∘ − ) ∘ 𝐻):ℕ⟶(0[,)+∞))
86	85	adantr 483	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → ((abs ∘ − ) ∘ 𝐻):ℕ⟶(0[,)+∞))
87	86	ffvelrnda 6853	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑘 ∈ ℕ) ∧ 𝑗 ∈ ℕ) → (((abs ∘ − ) ∘ 𝐻)‘𝑗) ∈ (0[,)+∞))
88		elrege0 12845	. . . . . . 7 ⊢ ((((abs ∘ − ) ∘ 𝐻)‘𝑗) ∈ (0[,)+∞) ↔ ((((abs ∘ − ) ∘ 𝐻)‘𝑗) ∈ ℝ ∧ 0 ≤ (((abs ∘ − ) ∘ 𝐻)‘𝑗)))
89	87, 88	sylib 220	. . . . . 6 ⊢ (((𝜑 ∧ 𝑘 ∈ ℕ) ∧ 𝑗 ∈ ℕ) → ((((abs ∘ − ) ∘ 𝐻)‘𝑗) ∈ ℝ ∧ 0 ≤ (((abs ∘ − ) ∘ 𝐻)‘𝑗)))
90	89	simpld 497	. . . . 5 ⊢ (((𝜑 ∧ 𝑘 ∈ ℕ) ∧ 𝑗 ∈ ℕ) → (((abs ∘ − ) ∘ 𝐻)‘𝑗) ∈ ℝ)
91	83, 90	sylan2 594	. . . 4 ⊢ (((𝜑 ∧ 𝑘 ∈ ℕ) ∧ 𝑗 ∈ (1...(2 · (⌊‘((𝑘 + 1) / 2))))) → (((abs ∘ − ) ∘ 𝐻)‘𝑗) ∈ ℝ)
92		elfzuz 12907	. . . . . 6 ⊢ (𝑗 ∈ ((𝑘 + 1)...(2 · (⌊‘((𝑘 + 1) / 2)))) → 𝑗 ∈ (ℤ_≥‘(𝑘 + 1)))
93		eluznn 12321	. . . . . 6 ⊢ (((𝑘 + 1) ∈ ℕ ∧ 𝑗 ∈ (ℤ_≥‘(𝑘 + 1))) → 𝑗 ∈ ℕ)
94	29, 92, 93	syl2an 597	. . . . 5 ⊢ (((𝜑 ∧ 𝑘 ∈ ℕ) ∧ 𝑗 ∈ ((𝑘 + 1)...(2 · (⌊‘((𝑘 + 1) / 2))))) → 𝑗 ∈ ℕ)
95	89	simprd 498	. . . . 5 ⊢ (((𝜑 ∧ 𝑘 ∈ ℕ) ∧ 𝑗 ∈ ℕ) → 0 ≤ (((abs ∘ − ) ∘ 𝐻)‘𝑗))
96	94, 95	syldan 593	. . . 4 ⊢ (((𝜑 ∧ 𝑘 ∈ ℕ) ∧ 𝑗 ∈ ((𝑘 + 1)...(2 · (⌊‘((𝑘 + 1) / 2))))) → 0 ≤ (((abs ∘ − ) ∘ 𝐻)‘𝑗))
97	73, 82, 91, 96	sermono 13405	. . 3 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (seq1( + , ((abs ∘ − ) ∘ 𝐻))‘𝑘) ≤ (seq1( + , ((abs ∘ − ) ∘ 𝐻))‘(2 · (⌊‘((𝑘 + 1) / 2)))))
98	20	fveq1i 6673	. . 3 ⊢ (𝑈‘𝑘) = (seq1( + , ((abs ∘ − ) ∘ 𝐻))‘𝑘)
99	20	fveq1i 6673	. . 3 ⊢ (𝑈‘(2 · (⌊‘((𝑘 + 1) / 2)))) = (seq1( + , ((abs ∘ − ) ∘ 𝐻))‘(2 · (⌊‘((𝑘 + 1) / 2))))
100	97, 98, 99	3brtr4g 5102	. 2 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (𝑈‘𝑘) ≤ (𝑈‘(2 · (⌊‘((𝑘 + 1) / 2)))))
101		eqid 2823	. . . . . . . . . 10 ⊢ ((abs ∘ − ) ∘ 𝐹) = ((abs ∘ − ) ∘ 𝐹)
102		ovolun.s	. . . . . . . . . 10 ⊢ 𝑆 = seq1( + , ((abs ∘ − ) ∘ 𝐹))
103	101, 102	ovolsf 24075	. . . . . . . . 9 ⊢ (𝐹:ℕ⟶( ≤ ∩ (ℝ × ℝ)) → 𝑆:ℕ⟶(0[,)+∞))
104	12, 103	syl 17	. . . . . . . 8 ⊢ (𝜑 → 𝑆:ℕ⟶(0[,)+∞))
105	104	frnd 6523	. . . . . . 7 ⊢ (𝜑 → ran 𝑆 ⊆ (0[,)+∞))
106	105, 23	sstrdi 3981	. . . . . 6 ⊢ (𝜑 → ran 𝑆 ⊆ ℝ)
107	106	adantr 483	. . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → ran 𝑆 ⊆ ℝ)
108	104	ffnd 6517	. . . . . 6 ⊢ (𝜑 → 𝑆 Fn ℕ)
109		fnfvelrn 6850	. . . . . 6 ⊢ ((𝑆 Fn ℕ ∧ (⌊‘((𝑘 + 1) / 2)) ∈ ℕ) → (𝑆‘(⌊‘((𝑘 + 1) / 2))) ∈ ran 𝑆)
110	108, 57, 109	syl2an2r 683	. . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (𝑆‘(⌊‘((𝑘 + 1) / 2))) ∈ ran 𝑆)
111	107, 110	sseldd 3970	. . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (𝑆‘(⌊‘((𝑘 + 1) / 2))) ∈ ℝ)
112		eqid 2823	. . . . . . . . . 10 ⊢ ((abs ∘ − ) ∘ 𝐺) = ((abs ∘ − ) ∘ 𝐺)
113		ovolun.t	. . . . . . . . . 10 ⊢ 𝑇 = seq1( + , ((abs ∘ − ) ∘ 𝐺))
114	112, 113	ovolsf 24075	. . . . . . . . 9 ⊢ (𝐺:ℕ⟶( ≤ ∩ (ℝ × ℝ)) → 𝑇:ℕ⟶(0[,)+∞))
115	3, 114	syl 17	. . . . . . . 8 ⊢ (𝜑 → 𝑇:ℕ⟶(0[,)+∞))
116	115	frnd 6523	. . . . . . 7 ⊢ (𝜑 → ran 𝑇 ⊆ (0[,)+∞))
117	116, 23	sstrdi 3981	. . . . . 6 ⊢ (𝜑 → ran 𝑇 ⊆ ℝ)
118	117	adantr 483	. . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → ran 𝑇 ⊆ ℝ)
119	115	ffnd 6517	. . . . . 6 ⊢ (𝜑 → 𝑇 Fn ℕ)
120		fnfvelrn 6850	. . . . . 6 ⊢ ((𝑇 Fn ℕ ∧ (⌊‘((𝑘 + 1) / 2)) ∈ ℕ) → (𝑇‘(⌊‘((𝑘 + 1) / 2))) ∈ ran 𝑇)
121	119, 57, 120	syl2an2r 683	. . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (𝑇‘(⌊‘((𝑘 + 1) / 2))) ∈ ran 𝑇)
122	118, 121	sseldd 3970	. . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (𝑇‘(⌊‘((𝑘 + 1) / 2))) ∈ ℝ)
123	68	rehalfcld 11887	. . . . . 6 ⊢ (𝜑 → (𝐶 / 2) ∈ ℝ)
124	63, 123	readdcld 10672	. . . . 5 ⊢ (𝜑 → ((vol*‘𝐴) + (𝐶 / 2)) ∈ ℝ)
125	124	adantr 483	. . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → ((vol*‘𝐴) + (𝐶 / 2)) ∈ ℝ)
126	65, 123	readdcld 10672	. . . . 5 ⊢ (𝜑 → ((vol*‘𝐵) + (𝐶 / 2)) ∈ ℝ)
127	126	adantr 483	. . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → ((vol*‘𝐵) + (𝐶 / 2)) ∈ ℝ)
128		ressxr 10687	. . . . . . . . 9 ⊢ ℝ ⊆ ℝ^*
129	106, 128	sstrdi 3981	. . . . . . . 8 ⊢ (𝜑 → ran 𝑆 ⊆ ℝ^*)
130		supxrcl 12711	. . . . . . . 8 ⊢ (ran 𝑆 ⊆ ℝ^* → sup(ran 𝑆, ℝ^, < ) ∈ ℝ^)
131	129, 130	syl 17	. . . . . . 7 ⊢ (𝜑 → sup(ran 𝑆, ℝ^, < ) ∈ ℝ^)
132		1nn 11651	. . . . . . . . . . 11 ⊢ 1 ∈ ℕ
133	104	fdmd 6525	. . . . . . . . . . 11 ⊢ (𝜑 → dom 𝑆 = ℕ)
134	132, 133	eleqtrrid 2922	. . . . . . . . . 10 ⊢ (𝜑 → 1 ∈ dom 𝑆)
135	134	ne0d 4303	. . . . . . . . 9 ⊢ (𝜑 → dom 𝑆 ≠ ∅)
136		dm0rn0 5797	. . . . . . . . . 10 ⊢ (dom 𝑆 = ∅ ↔ ran 𝑆 = ∅)
137	136	necon3bii 3070	. . . . . . . . 9 ⊢ (dom 𝑆 ≠ ∅ ↔ ran 𝑆 ≠ ∅)
138	135, 137	sylib 220	. . . . . . . 8 ⊢ (𝜑 → ran 𝑆 ≠ ∅)
139		supxrgtmnf 12725	. . . . . . . 8 ⊢ ((ran 𝑆 ⊆ ℝ ∧ ran 𝑆 ≠ ∅) → -∞ < sup(ran 𝑆, ℝ^*, < ))
140	106, 138, 139	syl2anc 586	. . . . . . 7 ⊢ (𝜑 → -∞ < sup(ran 𝑆, ℝ^*, < ))
141		ovolun.f3	. . . . . . 7 ⊢ (𝜑 → sup(ran 𝑆, ℝ^, < ) ≤ ((vol‘𝐴) + (𝐶 / 2)))
142		xrre 12565	. . . . . . 7 ⊢ (((sup(ran 𝑆, ℝ^, < ) ∈ ℝ^ ∧ ((vol‘𝐴) + (𝐶 / 2)) ∈ ℝ) ∧ (-∞ < sup(ran 𝑆, ℝ^, < ) ∧ sup(ran 𝑆, ℝ^, < ) ≤ ((vol‘𝐴) + (𝐶 / 2)))) → sup(ran 𝑆, ℝ^*, < ) ∈ ℝ)
143	131, 124, 140, 141, 142	syl22anc 836	. . . . . 6 ⊢ (𝜑 → sup(ran 𝑆, ℝ^*, < ) ∈ ℝ)
144	143	adantr 483	. . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → sup(ran 𝑆, ℝ^*, < ) ∈ ℝ)
145		supxrub 12720	. . . . . 6 ⊢ ((ran 𝑆 ⊆ ℝ^* ∧ (𝑆‘(⌊‘((𝑘 + 1) / 2))) ∈ ran 𝑆) → (𝑆‘(⌊‘((𝑘 + 1) / 2))) ≤ sup(ran 𝑆, ℝ^*, < ))
146	129, 110, 145	syl2an2r 683	. . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (𝑆‘(⌊‘((𝑘 + 1) / 2))) ≤ sup(ran 𝑆, ℝ^*, < ))
147	141	adantr 483	. . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → sup(ran 𝑆, ℝ^, < ) ≤ ((vol‘𝐴) + (𝐶 / 2)))
148	111, 144, 125, 146, 147	letrd 10799	. . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (𝑆‘(⌊‘((𝑘 + 1) / 2))) ≤ ((vol*‘𝐴) + (𝐶 / 2)))
149	117, 128	sstrdi 3981	. . . . . . . 8 ⊢ (𝜑 → ran 𝑇 ⊆ ℝ^*)
150		supxrcl 12711	. . . . . . . 8 ⊢ (ran 𝑇 ⊆ ℝ^* → sup(ran 𝑇, ℝ^, < ) ∈ ℝ^)
151	149, 150	syl 17	. . . . . . 7 ⊢ (𝜑 → sup(ran 𝑇, ℝ^, < ) ∈ ℝ^)
152	115	fdmd 6525	. . . . . . . . . . 11 ⊢ (𝜑 → dom 𝑇 = ℕ)
153	132, 152	eleqtrrid 2922	. . . . . . . . . 10 ⊢ (𝜑 → 1 ∈ dom 𝑇)
154	153	ne0d 4303	. . . . . . . . 9 ⊢ (𝜑 → dom 𝑇 ≠ ∅)
155		dm0rn0 5797	. . . . . . . . . 10 ⊢ (dom 𝑇 = ∅ ↔ ran 𝑇 = ∅)
156	155	necon3bii 3070	. . . . . . . . 9 ⊢ (dom 𝑇 ≠ ∅ ↔ ran 𝑇 ≠ ∅)
157	154, 156	sylib 220	. . . . . . . 8 ⊢ (𝜑 → ran 𝑇 ≠ ∅)
158		supxrgtmnf 12725	. . . . . . . 8 ⊢ ((ran 𝑇 ⊆ ℝ ∧ ran 𝑇 ≠ ∅) → -∞ < sup(ran 𝑇, ℝ^*, < ))
159	117, 157, 158	syl2anc 586	. . . . . . 7 ⊢ (𝜑 → -∞ < sup(ran 𝑇, ℝ^*, < ))
160		ovolun.g3	. . . . . . 7 ⊢ (𝜑 → sup(ran 𝑇, ℝ^, < ) ≤ ((vol‘𝐵) + (𝐶 / 2)))
161		xrre 12565	. . . . . . 7 ⊢ (((sup(ran 𝑇, ℝ^, < ) ∈ ℝ^ ∧ ((vol‘𝐵) + (𝐶 / 2)) ∈ ℝ) ∧ (-∞ < sup(ran 𝑇, ℝ^, < ) ∧ sup(ran 𝑇, ℝ^, < ) ≤ ((vol‘𝐵) + (𝐶 / 2)))) → sup(ran 𝑇, ℝ^*, < ) ∈ ℝ)
162	151, 126, 159, 160, 161	syl22anc 836	. . . . . 6 ⊢ (𝜑 → sup(ran 𝑇, ℝ^*, < ) ∈ ℝ)
163	162	adantr 483	. . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → sup(ran 𝑇, ℝ^*, < ) ∈ ℝ)
164		supxrub 12720	. . . . . 6 ⊢ ((ran 𝑇 ⊆ ℝ^* ∧ (𝑇‘(⌊‘((𝑘 + 1) / 2))) ∈ ran 𝑇) → (𝑇‘(⌊‘((𝑘 + 1) / 2))) ≤ sup(ran 𝑇, ℝ^*, < ))
165	149, 121, 164	syl2an2r 683	. . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (𝑇‘(⌊‘((𝑘 + 1) / 2))) ≤ sup(ran 𝑇, ℝ^*, < ))
166	160	adantr 483	. . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → sup(ran 𝑇, ℝ^, < ) ≤ ((vol‘𝐵) + (𝐶 / 2)))
167	122, 163, 127, 165, 166	letrd 10799	. . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (𝑇‘(⌊‘((𝑘 + 1) / 2))) ≤ ((vol*‘𝐵) + (𝐶 / 2)))
168	111, 122, 125, 127, 148, 167	le2addd 11261	. . 3 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → ((𝑆‘(⌊‘((𝑘 + 1) / 2))) + (𝑇‘(⌊‘((𝑘 + 1) / 2)))) ≤ (((vol‘𝐴) + (𝐶 / 2)) + ((vol‘𝐵) + (𝐶 / 2))))
169		oveq2 7166	. . . . . . . . 9 ⊢ (𝑧 = 1 → (2 · 𝑧) = (2 · 1))
170	169	fveq2d 6676	. . . . . . . 8 ⊢ (𝑧 = 1 → (𝑈‘(2 · 𝑧)) = (𝑈‘(2 · 1)))
171		fveq2 6672	. . . . . . . . 9 ⊢ (𝑧 = 1 → (𝑆‘𝑧) = (𝑆‘1))
172		fveq2 6672	. . . . . . . . 9 ⊢ (𝑧 = 1 → (𝑇‘𝑧) = (𝑇‘1))
173	171, 172	oveq12d 7176	. . . . . . . 8 ⊢ (𝑧 = 1 → ((𝑆‘𝑧) + (𝑇‘𝑧)) = ((𝑆‘1) + (𝑇‘1)))
174	170, 173	eqeq12d 2839	. . . . . . 7 ⊢ (𝑧 = 1 → ((𝑈‘(2 · 𝑧)) = ((𝑆‘𝑧) + (𝑇‘𝑧)) ↔ (𝑈‘(2 · 1)) = ((𝑆‘1) + (𝑇‘1))))
175	174	imbi2d 343	. . . . . 6 ⊢ (𝑧 = 1 → ((𝜑 → (𝑈‘(2 · 𝑧)) = ((𝑆‘𝑧) + (𝑇‘𝑧))) ↔ (𝜑 → (𝑈‘(2 · 1)) = ((𝑆‘1) + (𝑇‘1)))))
176		oveq2 7166	. . . . . . . . 9 ⊢ (𝑧 = 𝑘 → (2 · 𝑧) = (2 · 𝑘))
177	176	fveq2d 6676	. . . . . . . 8 ⊢ (𝑧 = 𝑘 → (𝑈‘(2 · 𝑧)) = (𝑈‘(2 · 𝑘)))
178		fveq2 6672	. . . . . . . . 9 ⊢ (𝑧 = 𝑘 → (𝑆‘𝑧) = (𝑆‘𝑘))
179		fveq2 6672	. . . . . . . . 9 ⊢ (𝑧 = 𝑘 → (𝑇‘𝑧) = (𝑇‘𝑘))
180	178, 179	oveq12d 7176	. . . . . . . 8 ⊢ (𝑧 = 𝑘 → ((𝑆‘𝑧) + (𝑇‘𝑧)) = ((𝑆‘𝑘) + (𝑇‘𝑘)))
181	177, 180	eqeq12d 2839	. . . . . . 7 ⊢ (𝑧 = 𝑘 → ((𝑈‘(2 · 𝑧)) = ((𝑆‘𝑧) + (𝑇‘𝑧)) ↔ (𝑈‘(2 · 𝑘)) = ((𝑆‘𝑘) + (𝑇‘𝑘))))
182	181	imbi2d 343	. . . . . 6 ⊢ (𝑧 = 𝑘 → ((𝜑 → (𝑈‘(2 · 𝑧)) = ((𝑆‘𝑧) + (𝑇‘𝑧))) ↔ (𝜑 → (𝑈‘(2 · 𝑘)) = ((𝑆‘𝑘) + (𝑇‘𝑘)))))
183		oveq2 7166	. . . . . . . . 9 ⊢ (𝑧 = (𝑘 + 1) → (2 · 𝑧) = (2 · (𝑘 + 1)))
184	183	fveq2d 6676	. . . . . . . 8 ⊢ (𝑧 = (𝑘 + 1) → (𝑈‘(2 · 𝑧)) = (𝑈‘(2 · (𝑘 + 1))))
185		fveq2 6672	. . . . . . . . 9 ⊢ (𝑧 = (𝑘 + 1) → (𝑆‘𝑧) = (𝑆‘(𝑘 + 1)))
186		fveq2 6672	. . . . . . . . 9 ⊢ (𝑧 = (𝑘 + 1) → (𝑇‘𝑧) = (𝑇‘(𝑘 + 1)))
187	185, 186	oveq12d 7176	. . . . . . . 8 ⊢ (𝑧 = (𝑘 + 1) → ((𝑆‘𝑧) + (𝑇‘𝑧)) = ((𝑆‘(𝑘 + 1)) + (𝑇‘(𝑘 + 1))))
188	184, 187	eqeq12d 2839	. . . . . . 7 ⊢ (𝑧 = (𝑘 + 1) → ((𝑈‘(2 · 𝑧)) = ((𝑆‘𝑧) + (𝑇‘𝑧)) ↔ (𝑈‘(2 · (𝑘 + 1))) = ((𝑆‘(𝑘 + 1)) + (𝑇‘(𝑘 + 1)))))
189	188	imbi2d 343	. . . . . 6 ⊢ (𝑧 = (𝑘 + 1) → ((𝜑 → (𝑈‘(2 · 𝑧)) = ((𝑆‘𝑧) + (𝑇‘𝑧))) ↔ (𝜑 → (𝑈‘(2 · (𝑘 + 1))) = ((𝑆‘(𝑘 + 1)) + (𝑇‘(𝑘 + 1))))))
190		oveq2 7166	. . . . . . . . 9 ⊢ (𝑧 = (⌊‘((𝑘 + 1) / 2)) → (2 · 𝑧) = (2 · (⌊‘((𝑘 + 1) / 2))))
191	190	fveq2d 6676	. . . . . . . 8 ⊢ (𝑧 = (⌊‘((𝑘 + 1) / 2)) → (𝑈‘(2 · 𝑧)) = (𝑈‘(2 · (⌊‘((𝑘 + 1) / 2)))))
192		fveq2 6672	. . . . . . . . 9 ⊢ (𝑧 = (⌊‘((𝑘 + 1) / 2)) → (𝑆‘𝑧) = (𝑆‘(⌊‘((𝑘 + 1) / 2))))
193		fveq2 6672	. . . . . . . . 9 ⊢ (𝑧 = (⌊‘((𝑘 + 1) / 2)) → (𝑇‘𝑧) = (𝑇‘(⌊‘((𝑘 + 1) / 2))))
194	192, 193	oveq12d 7176	. . . . . . . 8 ⊢ (𝑧 = (⌊‘((𝑘 + 1) / 2)) → ((𝑆‘𝑧) + (𝑇‘𝑧)) = ((𝑆‘(⌊‘((𝑘 + 1) / 2))) + (𝑇‘(⌊‘((𝑘 + 1) / 2)))))
195	191, 194	eqeq12d 2839	. . . . . . 7 ⊢ (𝑧 = (⌊‘((𝑘 + 1) / 2)) → ((𝑈‘(2 · 𝑧)) = ((𝑆‘𝑧) + (𝑇‘𝑧)) ↔ (𝑈‘(2 · (⌊‘((𝑘 + 1) / 2)))) = ((𝑆‘(⌊‘((𝑘 + 1) / 2))) + (𝑇‘(⌊‘((𝑘 + 1) / 2))))))
196	195	imbi2d 343	. . . . . 6 ⊢ (𝑧 = (⌊‘((𝑘 + 1) / 2)) → ((𝜑 → (𝑈‘(2 · 𝑧)) = ((𝑆‘𝑧) + (𝑇‘𝑧))) ↔ (𝜑 → (𝑈‘(2 · (⌊‘((𝑘 + 1) / 2)))) = ((𝑆‘(⌊‘((𝑘 + 1) / 2))) + (𝑇‘(⌊‘((𝑘 + 1) / 2)))))))
197	20	fveq1i 6673	. . . . . . . 8 ⊢ (𝑈‘(2 · 1)) = (seq1( + , ((abs ∘ − ) ∘ 𝐻))‘(2 · 1))
198	19	ovolfsval 24073	. . . . . . . . . . . 12 ⊢ ((𝐻:ℕ⟶( ≤ ∩ (ℝ × ℝ)) ∧ 1 ∈ ℕ) → (((abs ∘ − ) ∘ 𝐻)‘1) = ((2^nd ‘(𝐻‘1)) − (1^st ‘(𝐻‘1))))
199	18, 132, 198	sylancl 588	. . . . . . . . . . 11 ⊢ (𝜑 → (((abs ∘ − ) ∘ 𝐻)‘1) = ((2^nd ‘(𝐻‘1)) − (1^st ‘(𝐻‘1))))
200		halfnz 12063	. . . . . . . . . . . . . . . . . 18 ⊢ ¬ (1 / 2) ∈ ℤ
201		nnz 12007	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝑛 / 2) ∈ ℕ → (𝑛 / 2) ∈ ℤ)
202		oveq1 7165	. . . . . . . . . . . . . . . . . . . 20 ⊢ (𝑛 = 1 → (𝑛 / 2) = (1 / 2))
203	202	eleq1d 2899	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝑛 = 1 → ((𝑛 / 2) ∈ ℤ ↔ (1 / 2) ∈ ℤ))
204	201, 203	syl5ib 246	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑛 = 1 → ((𝑛 / 2) ∈ ℕ → (1 / 2) ∈ ℤ))
205	200, 204	mtoi 201	. . . . . . . . . . . . . . . . 17 ⊢ (𝑛 = 1 → ¬ (𝑛 / 2) ∈ ℕ)
206	205	iffalsed 4480	. . . . . . . . . . . . . . . 16 ⊢ (𝑛 = 1 → if((𝑛 / 2) ∈ ℕ, (𝐺‘(𝑛 / 2)), (𝐹‘((𝑛 + 1) / 2))) = (𝐹‘((𝑛 + 1) / 2)))
207		oveq1 7165	. . . . . . . . . . . . . . . . . . . 20 ⊢ (𝑛 = 1 → (𝑛 + 1) = (1 + 1))
208		df-2 11703	. . . . . . . . . . . . . . . . . . . 20 ⊢ 2 = (1 + 1)
209	207, 208	syl6eqr 2876	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝑛 = 1 → (𝑛 + 1) = 2)
210	209	oveq1d 7173	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑛 = 1 → ((𝑛 + 1) / 2) = (2 / 2))
211		2div2e1 11781	. . . . . . . . . . . . . . . . . 18 ⊢ (2 / 2) = 1
212	210, 211	syl6eq 2874	. . . . . . . . . . . . . . . . 17 ⊢ (𝑛 = 1 → ((𝑛 + 1) / 2) = 1)
213	212	fveq2d 6676	. . . . . . . . . . . . . . . 16 ⊢ (𝑛 = 1 → (𝐹‘((𝑛 + 1) / 2)) = (𝐹‘1))
214	206, 213	eqtrd 2858	. . . . . . . . . . . . . . 15 ⊢ (𝑛 = 1 → if((𝑛 / 2) ∈ ℕ, (𝐺‘(𝑛 / 2)), (𝐹‘((𝑛 + 1) / 2))) = (𝐹‘1))
215		fvex 6685	. . . . . . . . . . . . . . 15 ⊢ (𝐹‘1) ∈ V
216	214, 17, 215	fvmpt 6770	. . . . . . . . . . . . . 14 ⊢ (1 ∈ ℕ → (𝐻‘1) = (𝐹‘1))
217	132, 216	ax-mp 5	. . . . . . . . . . . . 13 ⊢ (𝐻‘1) = (𝐹‘1)
218	217	fveq2i 6675	. . . . . . . . . . . 12 ⊢ (2^nd ‘(𝐻‘1)) = (2^nd ‘(𝐹‘1))
219	217	fveq2i 6675	. . . . . . . . . . . 12 ⊢ (1^st ‘(𝐻‘1)) = (1^st ‘(𝐹‘1))
220	218, 219	oveq12i 7170	. . . . . . . . . . 11 ⊢ ((2^nd ‘(𝐻‘1)) − (1^st ‘(𝐻‘1))) = ((2^nd ‘(𝐹‘1)) − (1^st ‘(𝐹‘1)))
221	199, 220	syl6eq 2874	. . . . . . . . . 10 ⊢ (𝜑 → (((abs ∘ − ) ∘ 𝐻)‘1) = ((2^nd ‘(𝐹‘1)) − (1^st ‘(𝐹‘1))))
222	52, 221	seq1i 13386	. . . . . . . . 9 ⊢ (𝜑 → (seq1( + , ((abs ∘ − ) ∘ 𝐻))‘1) = ((2^nd ‘(𝐹‘1)) − (1^st ‘(𝐹‘1))))
223		2t1e2 11803	. . . . . . . . . . 11 ⊢ (2 · 1) = 2
224	223	fveq2i 6675	. . . . . . . . . 10 ⊢ (((abs ∘ − ) ∘ 𝐻)‘(2 · 1)) = (((abs ∘ − ) ∘ 𝐻)‘2)
225	19	ovolfsval 24073	. . . . . . . . . . . 12 ⊢ ((𝐻:ℕ⟶( ≤ ∩ (ℝ × ℝ)) ∧ 2 ∈ ℕ) → (((abs ∘ − ) ∘ 𝐻)‘2) = ((2^nd ‘(𝐻‘2)) − (1^st ‘(𝐻‘2))))
226	18, 27, 225	sylancl 588	. . . . . . . . . . 11 ⊢ (𝜑 → (((abs ∘ − ) ∘ 𝐻)‘2) = ((2^nd ‘(𝐻‘2)) − (1^st ‘(𝐻‘2))))
227		oveq1 7165	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝑛 = 2 → (𝑛 / 2) = (2 / 2))
228	227, 211	syl6eq 2874	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑛 = 2 → (𝑛 / 2) = 1)
229	228, 132	eqeltrdi 2923	. . . . . . . . . . . . . . . . 17 ⊢ (𝑛 = 2 → (𝑛 / 2) ∈ ℕ)
230	229	iftrued 4477	. . . . . . . . . . . . . . . 16 ⊢ (𝑛 = 2 → if((𝑛 / 2) ∈ ℕ, (𝐺‘(𝑛 / 2)), (𝐹‘((𝑛 + 1) / 2))) = (𝐺‘(𝑛 / 2)))
231	228	fveq2d 6676	. . . . . . . . . . . . . . . 16 ⊢ (𝑛 = 2 → (𝐺‘(𝑛 / 2)) = (𝐺‘1))
232	230, 231	eqtrd 2858	. . . . . . . . . . . . . . 15 ⊢ (𝑛 = 2 → if((𝑛 / 2) ∈ ℕ, (𝐺‘(𝑛 / 2)), (𝐹‘((𝑛 + 1) / 2))) = (𝐺‘1))
233		fvex 6685	. . . . . . . . . . . . . . 15 ⊢ (𝐺‘1) ∈ V
234	232, 17, 233	fvmpt 6770	. . . . . . . . . . . . . 14 ⊢ (2 ∈ ℕ → (𝐻‘2) = (𝐺‘1))
235	27, 234	ax-mp 5	. . . . . . . . . . . . 13 ⊢ (𝐻‘2) = (𝐺‘1)
236	235	fveq2i 6675	. . . . . . . . . . . 12 ⊢ (2^nd ‘(𝐻‘2)) = (2^nd ‘(𝐺‘1))
237	235	fveq2i 6675	. . . . . . . . . . . 12 ⊢ (1^st ‘(𝐻‘2)) = (1^st ‘(𝐺‘1))
238	236, 237	oveq12i 7170	. . . . . . . . . . 11 ⊢ ((2^nd ‘(𝐻‘2)) − (1^st ‘(𝐻‘2))) = ((2^nd ‘(𝐺‘1)) − (1^st ‘(𝐺‘1)))
239	226, 238	syl6eq 2874	. . . . . . . . . 10 ⊢ (𝜑 → (((abs ∘ − ) ∘ 𝐻)‘2) = ((2^nd ‘(𝐺‘1)) − (1^st ‘(𝐺‘1))))
240	224, 239	syl5eq 2870	. . . . . . . . 9 ⊢ (𝜑 → (((abs ∘ − ) ∘ 𝐻)‘(2 · 1)) = ((2^nd ‘(𝐺‘1)) − (1^st ‘(𝐺‘1))))
241	72, 132, 34, 222, 240	seqp1i 13389	. . . . . . . 8 ⊢ (𝜑 → (seq1( + , ((abs ∘ − ) ∘ 𝐻))‘(2 · 1)) = (((2^nd ‘(𝐹‘1)) − (1^st ‘(𝐹‘1))) + ((2^nd ‘(𝐺‘1)) − (1^st ‘(𝐺‘1)))))
242	197, 241	syl5eq 2870	. . . . . . 7 ⊢ (𝜑 → (𝑈‘(2 · 1)) = (((2^nd ‘(𝐹‘1)) − (1^st ‘(𝐹‘1))) + ((2^nd ‘(𝐺‘1)) − (1^st ‘(𝐺‘1)))))
243	102	fveq1i 6673	. . . . . . . . 9 ⊢ (𝑆‘1) = (seq1( + , ((abs ∘ − ) ∘ 𝐹))‘1)
244	101	ovolfsval 24073	. . . . . . . . . . 11 ⊢ ((𝐹:ℕ⟶( ≤ ∩ (ℝ × ℝ)) ∧ 1 ∈ ℕ) → (((abs ∘ − ) ∘ 𝐹)‘1) = ((2^nd ‘(𝐹‘1)) − (1^st ‘(𝐹‘1))))
245	12, 132, 244	sylancl 588	. . . . . . . . . 10 ⊢ (𝜑 → (((abs ∘ − ) ∘ 𝐹)‘1) = ((2^nd ‘(𝐹‘1)) − (1^st ‘(𝐹‘1))))
246	52, 245	seq1i 13386	. . . . . . . . 9 ⊢ (𝜑 → (seq1( + , ((abs ∘ − ) ∘ 𝐹))‘1) = ((2^nd ‘(𝐹‘1)) − (1^st ‘(𝐹‘1))))
247	243, 246	syl5eq 2870	. . . . . . . 8 ⊢ (𝜑 → (𝑆‘1) = ((2^nd ‘(𝐹‘1)) − (1^st ‘(𝐹‘1))))
248	113	fveq1i 6673	. . . . . . . . 9 ⊢ (𝑇‘1) = (seq1( + , ((abs ∘ − ) ∘ 𝐺))‘1)
249	112	ovolfsval 24073	. . . . . . . . . . 11 ⊢ ((𝐺:ℕ⟶( ≤ ∩ (ℝ × ℝ)) ∧ 1 ∈ ℕ) → (((abs ∘ − ) ∘ 𝐺)‘1) = ((2^nd ‘(𝐺‘1)) − (1^st ‘(𝐺‘1))))
250	3, 132, 249	sylancl 588	. . . . . . . . . 10 ⊢ (𝜑 → (((abs ∘ − ) ∘ 𝐺)‘1) = ((2^nd ‘(𝐺‘1)) − (1^st ‘(𝐺‘1))))
251	52, 250	seq1i 13386	. . . . . . . . 9 ⊢ (𝜑 → (seq1( + , ((abs ∘ − ) ∘ 𝐺))‘1) = ((2^nd ‘(𝐺‘1)) − (1^st ‘(𝐺‘1))))
252	248, 251	syl5eq 2870	. . . . . . . 8 ⊢ (𝜑 → (𝑇‘1) = ((2^nd ‘(𝐺‘1)) − (1^st ‘(𝐺‘1))))
253	247, 252	oveq12d 7176	. . . . . . 7 ⊢ (𝜑 → ((𝑆‘1) + (𝑇‘1)) = (((2^nd ‘(𝐹‘1)) − (1^st ‘(𝐹‘1))) + ((2^nd ‘(𝐺‘1)) − (1^st ‘(𝐺‘1)))))
254	242, 253	eqtr4d 2861	. . . . . 6 ⊢ (𝜑 → (𝑈‘(2 · 1)) = ((𝑆‘1) + (𝑇‘1)))
255		oveq1 7165	. . . . . . . . 9 ⊢ ((𝑈‘(2 · 𝑘)) = ((𝑆‘𝑘) + (𝑇‘𝑘)) → ((𝑈‘(2 · 𝑘)) + ((((abs ∘ − ) ∘ 𝐹)‘(𝑘 + 1)) + (((abs ∘ − ) ∘ 𝐺)‘(𝑘 + 1)))) = (((𝑆‘𝑘) + (𝑇‘𝑘)) + ((((abs ∘ − ) ∘ 𝐹)‘(𝑘 + 1)) + (((abs ∘ − ) ∘ 𝐺)‘(𝑘 + 1)))))
256	34	oveq2i 7169	. . . . . . . . . . . . 13 ⊢ ((2 · 𝑘) + (2 · 1)) = ((2 · 𝑘) + (1 + 1))
257		2cnd 11718	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → 2 ∈ ℂ)
258	38	recnd 10671	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → 𝑘 ∈ ℂ)
259		1cnd 10638	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → 1 ∈ ℂ)
260	257, 258, 259	adddid 10667	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (2 · (𝑘 + 1)) = ((2 · 𝑘) + (2 · 1)))
261		nnmulcl 11664	. . . . . . . . . . . . . . . . 17 ⊢ ((2 ∈ ℕ ∧ 𝑘 ∈ ℕ) → (2 · 𝑘) ∈ ℕ)
262	27, 261	mpan 688	. . . . . . . . . . . . . . . 16 ⊢ (𝑘 ∈ ℕ → (2 · 𝑘) ∈ ℕ)
263	262	adantl 484	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (2 · 𝑘) ∈ ℕ)
264	263	nncnd 11656	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (2 · 𝑘) ∈ ℂ)
265	264, 259, 259	addassd 10665	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (((2 · 𝑘) + 1) + 1) = ((2 · 𝑘) + (1 + 1)))
266	256, 260, 265	3eqtr4a 2884	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (2 · (𝑘 + 1)) = (((2 · 𝑘) + 1) + 1))
267	266	fveq2d 6676	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (𝑈‘(2 · (𝑘 + 1))) = (𝑈‘(((2 · 𝑘) + 1) + 1)))
268	20	fveq1i 6673	. . . . . . . . . . . 12 ⊢ (𝑈‘(((2 · 𝑘) + 1) + 1)) = (seq1( + , ((abs ∘ − ) ∘ 𝐻))‘(((2 · 𝑘) + 1) + 1))
269	263	peano2nnd 11657	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → ((2 · 𝑘) + 1) ∈ ℕ)
270	269, 72	eleqtrdi 2925	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → ((2 · 𝑘) + 1) ∈ (ℤ_≥‘1))
271		seqp1 13387	. . . . . . . . . . . . . 14 ⊢ (((2 · 𝑘) + 1) ∈ (ℤ_≥‘1) → (seq1( + , ((abs ∘ − ) ∘ 𝐻))‘(((2 · 𝑘) + 1) + 1)) = ((seq1( + , ((abs ∘ − ) ∘ 𝐻))‘((2 · 𝑘) + 1)) + (((abs ∘ − ) ∘ 𝐻)‘(((2 · 𝑘) + 1) + 1))))
272	270, 271	syl 17	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (seq1( + , ((abs ∘ − ) ∘ 𝐻))‘(((2 · 𝑘) + 1) + 1)) = ((seq1( + , ((abs ∘ − ) ∘ 𝐻))‘((2 · 𝑘) + 1)) + (((abs ∘ − ) ∘ 𝐻)‘(((2 · 𝑘) + 1) + 1))))
273	263, 72	eleqtrdi 2925	. . . . . . . . . . . . . . . 16 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (2 · 𝑘) ∈ (ℤ_≥‘1))
274		seqp1 13387	. . . . . . . . . . . . . . . 16 ⊢ ((2 · 𝑘) ∈ (ℤ_≥‘1) → (seq1( + , ((abs ∘ − ) ∘ 𝐻))‘((2 · 𝑘) + 1)) = ((seq1( + , ((abs ∘ − ) ∘ 𝐻))‘(2 · 𝑘)) + (((abs ∘ − ) ∘ 𝐻)‘((2 · 𝑘) + 1))))
275	273, 274	syl 17	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (seq1( + , ((abs ∘ − ) ∘ 𝐻))‘((2 · 𝑘) + 1)) = ((seq1( + , ((abs ∘ − ) ∘ 𝐻))‘(2 · 𝑘)) + (((abs ∘ − ) ∘ 𝐻)‘((2 · 𝑘) + 1))))
276	20	fveq1i 6673	. . . . . . . . . . . . . . . . 17 ⊢ (𝑈‘(2 · 𝑘)) = (seq1( + , ((abs ∘ − ) ∘ 𝐻))‘(2 · 𝑘))
277	276	a1i 11	. . . . . . . . . . . . . . . 16 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (𝑈‘(2 · 𝑘)) = (seq1( + , ((abs ∘ − ) ∘ 𝐻))‘(2 · 𝑘)))
278		oveq1 7165	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ (𝑛 = ((2 · 𝑘) + 1) → (𝑛 / 2) = (((2 · 𝑘) + 1) / 2))
279	278	eleq1d 2899	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ (𝑛 = ((2 · 𝑘) + 1) → ((𝑛 / 2) ∈ ℕ ↔ (((2 · 𝑘) + 1) / 2) ∈ ℕ))
280	278	fveq2d 6676	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ (𝑛 = ((2 · 𝑘) + 1) → (𝐺‘(𝑛 / 2)) = (𝐺‘(((2 · 𝑘) + 1) / 2)))
281		oveq1 7165	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ (𝑛 = ((2 · 𝑘) + 1) → (𝑛 + 1) = (((2 · 𝑘) + 1) + 1))
282	281	fvoveq1d 7180	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ (𝑛 = ((2 · 𝑘) + 1) → (𝐹‘((𝑛 + 1) / 2)) = (𝐹‘((((2 · 𝑘) + 1) + 1) / 2)))
283	279, 280, 282	ifbieq12d 4496	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ (𝑛 = ((2 · 𝑘) + 1) → if((𝑛 / 2) ∈ ℕ, (𝐺‘(𝑛 / 2)), (𝐹‘((𝑛 + 1) / 2))) = if((((2 · 𝑘) + 1) / 2) ∈ ℕ, (𝐺‘(((2 · 𝑘) + 1) / 2)), (𝐹‘((((2 · 𝑘) + 1) + 1) / 2))))
284		fvex 6685	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ (𝐺‘(((2 · 𝑘) + 1) / 2)) ∈ V
285		fvex 6685	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ (𝐹‘((((2 · 𝑘) + 1) + 1) / 2)) ∈ V
286	284, 285	ifex 4517	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ if((((2 · 𝑘) + 1) / 2) ∈ ℕ, (𝐺‘(((2 · 𝑘) + 1) / 2)), (𝐹‘((((2 · 𝑘) + 1) + 1) / 2))) ∈ V
287	283, 17, 286	fvmpt 6770	. . . . . . . . . . . . . . . . . . . . 21 ⊢ (((2 · 𝑘) + 1) ∈ ℕ → (𝐻‘((2 · 𝑘) + 1)) = if((((2 · 𝑘) + 1) / 2) ∈ ℕ, (𝐺‘(((2 · 𝑘) + 1) / 2)), (𝐹‘((((2 · 𝑘) + 1) + 1) / 2))))
288	269, 287	syl 17	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (𝐻‘((2 · 𝑘) + 1)) = if((((2 · 𝑘) + 1) / 2) ∈ ℕ, (𝐺‘(((2 · 𝑘) + 1) / 2)), (𝐹‘((((2 · 𝑘) + 1) + 1) / 2))))
289		2ne0 11744	. . . . . . . . . . . . . . . . . . . . . . . . 25 ⊢ 2 ≠ 0
290	289	a1i 11	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → 2 ≠ 0)
291	258, 257, 290	divcan3d 11423	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → ((2 · 𝑘) / 2) = 𝑘)
292	291, 71	eqeltrd 2915	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → ((2 · 𝑘) / 2) ∈ ℕ)
293		nneo 12069	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ ((2 · 𝑘) ∈ ℕ → (((2 · 𝑘) / 2) ∈ ℕ ↔ ¬ (((2 · 𝑘) + 1) / 2) ∈ ℕ))
294	263, 293	syl 17	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (((2 · 𝑘) / 2) ∈ ℕ ↔ ¬ (((2 · 𝑘) + 1) / 2) ∈ ℕ))
295	292, 294	mpbid 234	. . . . . . . . . . . . . . . . . . . . 21 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → ¬ (((2 · 𝑘) + 1) / 2) ∈ ℕ)
296	295	iffalsed 4480	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → if((((2 · 𝑘) + 1) / 2) ∈ ℕ, (𝐺‘(((2 · 𝑘) + 1) / 2)), (𝐹‘((((2 · 𝑘) + 1) + 1) / 2))) = (𝐹‘((((2 · 𝑘) + 1) + 1) / 2)))
297	266	oveq1d 7173	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → ((2 · (𝑘 + 1)) / 2) = ((((2 · 𝑘) + 1) + 1) / 2))
298	29	nncnd 11656	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (𝑘 + 1) ∈ ℂ)
299		2cn 11715	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ 2 ∈ ℂ
300		divcan3 11326	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ (((𝑘 + 1) ∈ ℂ ∧ 2 ∈ ℂ ∧ 2 ≠ 0) → ((2 · (𝑘 + 1)) / 2) = (𝑘 + 1))
301	299, 289, 300	mp3an23 1449	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ ((𝑘 + 1) ∈ ℂ → ((2 · (𝑘 + 1)) / 2) = (𝑘 + 1))
302	298, 301	syl 17	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → ((2 · (𝑘 + 1)) / 2) = (𝑘 + 1))
303	297, 302	eqtr3d 2860	. . . . . . . . . . . . . . . . . . . . 21 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → ((((2 · 𝑘) + 1) + 1) / 2) = (𝑘 + 1))
304	303	fveq2d 6676	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (𝐹‘((((2 · 𝑘) + 1) + 1) / 2)) = (𝐹‘(𝑘 + 1)))
305	288, 296, 304	3eqtrd 2862	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (𝐻‘((2 · 𝑘) + 1)) = (𝐹‘(𝑘 + 1)))
306	305	fveq2d 6676	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (2^nd ‘(𝐻‘((2 · 𝑘) + 1))) = (2^nd ‘(𝐹‘(𝑘 + 1))))
307	305	fveq2d 6676	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (1^st ‘(𝐻‘((2 · 𝑘) + 1))) = (1^st ‘(𝐹‘(𝑘 + 1))))
308	306, 307	oveq12d 7176	. . . . . . . . . . . . . . . . 17 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → ((2^nd ‘(𝐻‘((2 · 𝑘) + 1))) − (1^st ‘(𝐻‘((2 · 𝑘) + 1)))) = ((2^nd ‘(𝐹‘(𝑘 + 1))) − (1^st ‘(𝐹‘(𝑘 + 1)))))
309	19	ovolfsval 24073	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝐻:ℕ⟶( ≤ ∩ (ℝ × ℝ)) ∧ ((2 · 𝑘) + 1) ∈ ℕ) → (((abs ∘ − ) ∘ 𝐻)‘((2 · 𝑘) + 1)) = ((2^nd ‘(𝐻‘((2 · 𝑘) + 1))) − (1^st ‘(𝐻‘((2 · 𝑘) + 1)))))
310	18, 269, 309	syl2an2r 683	. . . . . . . . . . . . . . . . 17 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (((abs ∘ − ) ∘ 𝐻)‘((2 · 𝑘) + 1)) = ((2^nd ‘(𝐻‘((2 · 𝑘) + 1))) − (1^st ‘(𝐻‘((2 · 𝑘) + 1)))))
311	101	ovolfsval 24073	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝐹:ℕ⟶( ≤ ∩ (ℝ × ℝ)) ∧ (𝑘 + 1) ∈ ℕ) → (((abs ∘ − ) ∘ 𝐹)‘(𝑘 + 1)) = ((2^nd ‘(𝐹‘(𝑘 + 1))) − (1^st ‘(𝐹‘(𝑘 + 1)))))
312	12, 28, 311	syl2an 597	. . . . . . . . . . . . . . . . 17 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (((abs ∘ − ) ∘ 𝐹)‘(𝑘 + 1)) = ((2^nd ‘(𝐹‘(𝑘 + 1))) − (1^st ‘(𝐹‘(𝑘 + 1)))))
313	308, 310, 312	3eqtr4rd 2869	. . . . . . . . . . . . . . . 16 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (((abs ∘ − ) ∘ 𝐹)‘(𝑘 + 1)) = (((abs ∘ − ) ∘ 𝐻)‘((2 · 𝑘) + 1)))
314	277, 313	oveq12d 7176	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → ((𝑈‘(2 · 𝑘)) + (((abs ∘ − ) ∘ 𝐹)‘(𝑘 + 1))) = ((seq1( + , ((abs ∘ − ) ∘ 𝐻))‘(2 · 𝑘)) + (((abs ∘ − ) ∘ 𝐻)‘((2 · 𝑘) + 1))))
315	275, 314	eqtr4d 2861	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (seq1( + , ((abs ∘ − ) ∘ 𝐻))‘((2 · 𝑘) + 1)) = ((𝑈‘(2 · 𝑘)) + (((abs ∘ − ) ∘ 𝐹)‘(𝑘 + 1))))
316	266	fveq2d 6676	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (𝐻‘(2 · (𝑘 + 1))) = (𝐻‘(((2 · 𝑘) + 1) + 1)))
317	269	peano2nnd 11657	. . . . . . . . . . . . . . . . . . . . 21 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (((2 · 𝑘) + 1) + 1) ∈ ℕ)
318	266, 317	eqeltrd 2915	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (2 · (𝑘 + 1)) ∈ ℕ)
319		oveq1 7165	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ (𝑛 = (2 · (𝑘 + 1)) → (𝑛 / 2) = ((2 · (𝑘 + 1)) / 2))
320	319	eleq1d 2899	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ (𝑛 = (2 · (𝑘 + 1)) → ((𝑛 / 2) ∈ ℕ ↔ ((2 · (𝑘 + 1)) / 2) ∈ ℕ))
321	319	fveq2d 6676	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ (𝑛 = (2 · (𝑘 + 1)) → (𝐺‘(𝑛 / 2)) = (𝐺‘((2 · (𝑘 + 1)) / 2)))
322		oveq1 7165	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ (𝑛 = (2 · (𝑘 + 1)) → (𝑛 + 1) = ((2 · (𝑘 + 1)) + 1))
323	322	fvoveq1d 7180	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ (𝑛 = (2 · (𝑘 + 1)) → (𝐹‘((𝑛 + 1) / 2)) = (𝐹‘(((2 · (𝑘 + 1)) + 1) / 2)))
324	320, 321, 323	ifbieq12d 4496	. . . . . . . . . . . . . . . . . . . . 21 ⊢ (𝑛 = (2 · (𝑘 + 1)) → if((𝑛 / 2) ∈ ℕ, (𝐺‘(𝑛 / 2)), (𝐹‘((𝑛 + 1) / 2))) = if(((2 · (𝑘 + 1)) / 2) ∈ ℕ, (𝐺‘((2 · (𝑘 + 1)) / 2)), (𝐹‘(((2 · (𝑘 + 1)) + 1) / 2))))
325		fvex 6685	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ (𝐺‘((2 · (𝑘 + 1)) / 2)) ∈ V
326		fvex 6685	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ (𝐹‘(((2 · (𝑘 + 1)) + 1) / 2)) ∈ V
327	325, 326	ifex 4517	. . . . . . . . . . . . . . . . . . . . 21 ⊢ if(((2 · (𝑘 + 1)) / 2) ∈ ℕ, (𝐺‘((2 · (𝑘 + 1)) / 2)), (𝐹‘(((2 · (𝑘 + 1)) + 1) / 2))) ∈ V
328	324, 17, 327	fvmpt 6770	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((2 · (𝑘 + 1)) ∈ ℕ → (𝐻‘(2 · (𝑘 + 1))) = if(((2 · (𝑘 + 1)) / 2) ∈ ℕ, (𝐺‘((2 · (𝑘 + 1)) / 2)), (𝐹‘(((2 · (𝑘 + 1)) + 1) / 2))))
329	318, 328	syl 17	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (𝐻‘(2 · (𝑘 + 1))) = if(((2 · (𝑘 + 1)) / 2) ∈ ℕ, (𝐺‘((2 · (𝑘 + 1)) / 2)), (𝐹‘(((2 · (𝑘 + 1)) + 1) / 2))))
330	302, 29	eqeltrd 2915	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → ((2 · (𝑘 + 1)) / 2) ∈ ℕ)
331	330	iftrued 4477	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → if(((2 · (𝑘 + 1)) / 2) ∈ ℕ, (𝐺‘((2 · (𝑘 + 1)) / 2)), (𝐹‘(((2 · (𝑘 + 1)) + 1) / 2))) = (𝐺‘((2 · (𝑘 + 1)) / 2)))
332	302	fveq2d 6676	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (𝐺‘((2 · (𝑘 + 1)) / 2)) = (𝐺‘(𝑘 + 1)))
333	329, 331, 332	3eqtrd 2862	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (𝐻‘(2 · (𝑘 + 1))) = (𝐺‘(𝑘 + 1)))
334	316, 333	eqtr3d 2860	. . . . . . . . . . . . . . . . 17 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (𝐻‘(((2 · 𝑘) + 1) + 1)) = (𝐺‘(𝑘 + 1)))
335	334	fveq2d 6676	. . . . . . . . . . . . . . . 16 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (2^nd ‘(𝐻‘(((2 · 𝑘) + 1) + 1))) = (2^nd ‘(𝐺‘(𝑘 + 1))))
336	334	fveq2d 6676	. . . . . . . . . . . . . . . 16 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (1^st ‘(𝐻‘(((2 · 𝑘) + 1) + 1))) = (1^st ‘(𝐺‘(𝑘 + 1))))
337	335, 336	oveq12d 7176	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → ((2^nd ‘(𝐻‘(((2 · 𝑘) + 1) + 1))) − (1^st ‘(𝐻‘(((2 · 𝑘) + 1) + 1)))) = ((2^nd ‘(𝐺‘(𝑘 + 1))) − (1^st ‘(𝐺‘(𝑘 + 1)))))
338	19	ovolfsval 24073	. . . . . . . . . . . . . . . 16 ⊢ ((𝐻:ℕ⟶( ≤ ∩ (ℝ × ℝ)) ∧ (((2 · 𝑘) + 1) + 1) ∈ ℕ) → (((abs ∘ − ) ∘ 𝐻)‘(((2 · 𝑘) + 1) + 1)) = ((2^nd ‘(𝐻‘(((2 · 𝑘) + 1) + 1))) − (1^st ‘(𝐻‘(((2 · 𝑘) + 1) + 1)))))
339	18, 317, 338	syl2an2r 683	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (((abs ∘ − ) ∘ 𝐻)‘(((2 · 𝑘) + 1) + 1)) = ((2^nd ‘(𝐻‘(((2 · 𝑘) + 1) + 1))) − (1^st ‘(𝐻‘(((2 · 𝑘) + 1) + 1)))))
340	112	ovolfsval 24073	. . . . . . . . . . . . . . . 16 ⊢ ((𝐺:ℕ⟶( ≤ ∩ (ℝ × ℝ)) ∧ (𝑘 + 1) ∈ ℕ) → (((abs ∘ − ) ∘ 𝐺)‘(𝑘 + 1)) = ((2^nd ‘(𝐺‘(𝑘 + 1))) − (1^st ‘(𝐺‘(𝑘 + 1)))))
341	3, 28, 340	syl2an 597	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (((abs ∘ − ) ∘ 𝐺)‘(𝑘 + 1)) = ((2^nd ‘(𝐺‘(𝑘 + 1))) − (1^st ‘(𝐺‘(𝑘 + 1)))))
342	337, 339, 341	3eqtr4d 2868	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (((abs ∘ − ) ∘ 𝐻)‘(((2 · 𝑘) + 1) + 1)) = (((abs ∘ − ) ∘ 𝐺)‘(𝑘 + 1)))
343	315, 342	oveq12d 7176	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → ((seq1( + , ((abs ∘ − ) ∘ 𝐻))‘((2 · 𝑘) + 1)) + (((abs ∘ − ) ∘ 𝐻)‘(((2 · 𝑘) + 1) + 1))) = (((𝑈‘(2 · 𝑘)) + (((abs ∘ − ) ∘ 𝐹)‘(𝑘 + 1))) + (((abs ∘ − ) ∘ 𝐺)‘(𝑘 + 1))))
344	272, 343	eqtrd 2858	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (seq1( + , ((abs ∘ − ) ∘ 𝐻))‘(((2 · 𝑘) + 1) + 1)) = (((𝑈‘(2 · 𝑘)) + (((abs ∘ − ) ∘ 𝐹)‘(𝑘 + 1))) + (((abs ∘ − ) ∘ 𝐺)‘(𝑘 + 1))))
345	268, 344	syl5eq 2870	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (𝑈‘(((2 · 𝑘) + 1) + 1)) = (((𝑈‘(2 · 𝑘)) + (((abs ∘ − ) ∘ 𝐹)‘(𝑘 + 1))) + (((abs ∘ − ) ∘ 𝐺)‘(𝑘 + 1))))
346		ffvelrn 6851	. . . . . . . . . . . . . . 15 ⊢ ((𝑈:ℕ⟶(0[,)+∞) ∧ (2 · 𝑘) ∈ ℕ) → (𝑈‘(2 · 𝑘)) ∈ (0[,)+∞))
347	22, 262, 346	syl2an 597	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (𝑈‘(2 · 𝑘)) ∈ (0[,)+∞))
348	23, 347	sseldi 3967	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (𝑈‘(2 · 𝑘)) ∈ ℝ)
349	348	recnd 10671	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (𝑈‘(2 · 𝑘)) ∈ ℂ)
350	101	ovolfsf 24074	. . . . . . . . . . . . . . . 16 ⊢ (𝐹:ℕ⟶( ≤ ∩ (ℝ × ℝ)) → ((abs ∘ − ) ∘ 𝐹):ℕ⟶(0[,)+∞))
351	12, 350	syl 17	. . . . . . . . . . . . . . 15 ⊢ (𝜑 → ((abs ∘ − ) ∘ 𝐹):ℕ⟶(0[,)+∞))
352		ffvelrn 6851	. . . . . . . . . . . . . . 15 ⊢ ((((abs ∘ − ) ∘ 𝐹):ℕ⟶(0[,)+∞) ∧ (𝑘 + 1) ∈ ℕ) → (((abs ∘ − ) ∘ 𝐹)‘(𝑘 + 1)) ∈ (0[,)+∞))
353	351, 28, 352	syl2an 597	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (((abs ∘ − ) ∘ 𝐹)‘(𝑘 + 1)) ∈ (0[,)+∞))
354	23, 353	sseldi 3967	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (((abs ∘ − ) ∘ 𝐹)‘(𝑘 + 1)) ∈ ℝ)
355	354	recnd 10671	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (((abs ∘ − ) ∘ 𝐹)‘(𝑘 + 1)) ∈ ℂ)
356	112	ovolfsf 24074	. . . . . . . . . . . . . . . 16 ⊢ (𝐺:ℕ⟶( ≤ ∩ (ℝ × ℝ)) → ((abs ∘ − ) ∘ 𝐺):ℕ⟶(0[,)+∞))
357	3, 356	syl 17	. . . . . . . . . . . . . . 15 ⊢ (𝜑 → ((abs ∘ − ) ∘ 𝐺):ℕ⟶(0[,)+∞))
358		ffvelrn 6851	. . . . . . . . . . . . . . 15 ⊢ ((((abs ∘ − ) ∘ 𝐺):ℕ⟶(0[,)+∞) ∧ (𝑘 + 1) ∈ ℕ) → (((abs ∘ − ) ∘ 𝐺)‘(𝑘 + 1)) ∈ (0[,)+∞))
359	357, 28, 358	syl2an 597	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (((abs ∘ − ) ∘ 𝐺)‘(𝑘 + 1)) ∈ (0[,)+∞))
360	23, 359	sseldi 3967	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (((abs ∘ − ) ∘ 𝐺)‘(𝑘 + 1)) ∈ ℝ)
361	360	recnd 10671	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (((abs ∘ − ) ∘ 𝐺)‘(𝑘 + 1)) ∈ ℂ)
362	349, 355, 361	addassd 10665	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (((𝑈‘(2 · 𝑘)) + (((abs ∘ − ) ∘ 𝐹)‘(𝑘 + 1))) + (((abs ∘ − ) ∘ 𝐺)‘(𝑘 + 1))) = ((𝑈‘(2 · 𝑘)) + ((((abs ∘ − ) ∘ 𝐹)‘(𝑘 + 1)) + (((abs ∘ − ) ∘ 𝐺)‘(𝑘 + 1)))))
363	267, 345, 362	3eqtrd 2862	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (𝑈‘(2 · (𝑘 + 1))) = ((𝑈‘(2 · 𝑘)) + ((((abs ∘ − ) ∘ 𝐹)‘(𝑘 + 1)) + (((abs ∘ − ) ∘ 𝐺)‘(𝑘 + 1)))))
364		seqp1 13387	. . . . . . . . . . . . . 14 ⊢ (𝑘 ∈ (ℤ_≥‘1) → (seq1( + , ((abs ∘ − ) ∘ 𝐹))‘(𝑘 + 1)) = ((seq1( + , ((abs ∘ − ) ∘ 𝐹))‘𝑘) + (((abs ∘ − ) ∘ 𝐹)‘(𝑘 + 1))))
365	73, 364	syl 17	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (seq1( + , ((abs ∘ − ) ∘ 𝐹))‘(𝑘 + 1)) = ((seq1( + , ((abs ∘ − ) ∘ 𝐹))‘𝑘) + (((abs ∘ − ) ∘ 𝐹)‘(𝑘 + 1))))
366	102	fveq1i 6673	. . . . . . . . . . . . 13 ⊢ (𝑆‘(𝑘 + 1)) = (seq1( + , ((abs ∘ − ) ∘ 𝐹))‘(𝑘 + 1))
367	102	fveq1i 6673	. . . . . . . . . . . . . 14 ⊢ (𝑆‘𝑘) = (seq1( + , ((abs ∘ − ) ∘ 𝐹))‘𝑘)
368	367	oveq1i 7168	. . . . . . . . . . . . 13 ⊢ ((𝑆‘𝑘) + (((abs ∘ − ) ∘ 𝐹)‘(𝑘 + 1))) = ((seq1( + , ((abs ∘ − ) ∘ 𝐹))‘𝑘) + (((abs ∘ − ) ∘ 𝐹)‘(𝑘 + 1)))
369	365, 366, 368	3eqtr4g 2883	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (𝑆‘(𝑘 + 1)) = ((𝑆‘𝑘) + (((abs ∘ − ) ∘ 𝐹)‘(𝑘 + 1))))
370		seqp1 13387	. . . . . . . . . . . . . 14 ⊢ (𝑘 ∈ (ℤ_≥‘1) → (seq1( + , ((abs ∘ − ) ∘ 𝐺))‘(𝑘 + 1)) = ((seq1( + , ((abs ∘ − ) ∘ 𝐺))‘𝑘) + (((abs ∘ − ) ∘ 𝐺)‘(𝑘 + 1))))
371	73, 370	syl 17	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (seq1( + , ((abs ∘ − ) ∘ 𝐺))‘(𝑘 + 1)) = ((seq1( + , ((abs ∘ − ) ∘ 𝐺))‘𝑘) + (((abs ∘ − ) ∘ 𝐺)‘(𝑘 + 1))))
372	113	fveq1i 6673	. . . . . . . . . . . . 13 ⊢ (𝑇‘(𝑘 + 1)) = (seq1( + , ((abs ∘ − ) ∘ 𝐺))‘(𝑘 + 1))
373	113	fveq1i 6673	. . . . . . . . . . . . . 14 ⊢ (𝑇‘𝑘) = (seq1( + , ((abs ∘ − ) ∘ 𝐺))‘𝑘)
374	373	oveq1i 7168	. . . . . . . . . . . . 13 ⊢ ((𝑇‘𝑘) + (((abs ∘ − ) ∘ 𝐺)‘(𝑘 + 1))) = ((seq1( + , ((abs ∘ − ) ∘ 𝐺))‘𝑘) + (((abs ∘ − ) ∘ 𝐺)‘(𝑘 + 1)))
375	371, 372, 374	3eqtr4g 2883	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (𝑇‘(𝑘 + 1)) = ((𝑇‘𝑘) + (((abs ∘ − ) ∘ 𝐺)‘(𝑘 + 1))))
376	369, 375	oveq12d 7176	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → ((𝑆‘(𝑘 + 1)) + (𝑇‘(𝑘 + 1))) = (((𝑆‘𝑘) + (((abs ∘ − ) ∘ 𝐹)‘(𝑘 + 1))) + ((𝑇‘𝑘) + (((abs ∘ − ) ∘ 𝐺)‘(𝑘 + 1)))))
377	104	ffvelrnda 6853	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (𝑆‘𝑘) ∈ (0[,)+∞))
378	23, 377	sseldi 3967	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (𝑆‘𝑘) ∈ ℝ)
379	378	recnd 10671	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (𝑆‘𝑘) ∈ ℂ)
380	115	ffvelrnda 6853	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (𝑇‘𝑘) ∈ (0[,)+∞))
381	23, 380	sseldi 3967	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (𝑇‘𝑘) ∈ ℝ)
382	381	recnd 10671	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (𝑇‘𝑘) ∈ ℂ)
383	379, 355, 382, 361	add4d 10870	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (((𝑆‘𝑘) + (((abs ∘ − ) ∘ 𝐹)‘(𝑘 + 1))) + ((𝑇‘𝑘) + (((abs ∘ − ) ∘ 𝐺)‘(𝑘 + 1)))) = (((𝑆‘𝑘) + (𝑇‘𝑘)) + ((((abs ∘ − ) ∘ 𝐹)‘(𝑘 + 1)) + (((abs ∘ − ) ∘ 𝐺)‘(𝑘 + 1)))))
384	376, 383	eqtrd 2858	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → ((𝑆‘(𝑘 + 1)) + (𝑇‘(𝑘 + 1))) = (((𝑆‘𝑘) + (𝑇‘𝑘)) + ((((abs ∘ − ) ∘ 𝐹)‘(𝑘 + 1)) + (((abs ∘ − ) ∘ 𝐺)‘(𝑘 + 1)))))
385	363, 384	eqeq12d 2839	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → ((𝑈‘(2 · (𝑘 + 1))) = ((𝑆‘(𝑘 + 1)) + (𝑇‘(𝑘 + 1))) ↔ ((𝑈‘(2 · 𝑘)) + ((((abs ∘ − ) ∘ 𝐹)‘(𝑘 + 1)) + (((abs ∘ − ) ∘ 𝐺)‘(𝑘 + 1)))) = (((𝑆‘𝑘) + (𝑇‘𝑘)) + ((((abs ∘ − ) ∘ 𝐹)‘(𝑘 + 1)) + (((abs ∘ − ) ∘ 𝐺)‘(𝑘 + 1))))))
386	255, 385	syl5ibr 248	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → ((𝑈‘(2 · 𝑘)) = ((𝑆‘𝑘) + (𝑇‘𝑘)) → (𝑈‘(2 · (𝑘 + 1))) = ((𝑆‘(𝑘 + 1)) + (𝑇‘(𝑘 + 1)))))
387	386	expcom 416	. . . . . . 7 ⊢ (𝑘 ∈ ℕ → (𝜑 → ((𝑈‘(2 · 𝑘)) = ((𝑆‘𝑘) + (𝑇‘𝑘)) → (𝑈‘(2 · (𝑘 + 1))) = ((𝑆‘(𝑘 + 1)) + (𝑇‘(𝑘 + 1))))))
388	387	a2d 29	. . . . . 6 ⊢ (𝑘 ∈ ℕ → ((𝜑 → (𝑈‘(2 · 𝑘)) = ((𝑆‘𝑘) + (𝑇‘𝑘))) → (𝜑 → (𝑈‘(2 · (𝑘 + 1))) = ((𝑆‘(𝑘 + 1)) + (𝑇‘(𝑘 + 1))))))
389	175, 182, 189, 196, 254, 388	nnind 11658	. . . . 5 ⊢ ((⌊‘((𝑘 + 1) / 2)) ∈ ℕ → (𝜑 → (𝑈‘(2 · (⌊‘((𝑘 + 1) / 2)))) = ((𝑆‘(⌊‘((𝑘 + 1) / 2))) + (𝑇‘(⌊‘((𝑘 + 1) / 2))))))
390	389	impcom 410	. . . 4 ⊢ ((𝜑 ∧ (⌊‘((𝑘 + 1) / 2)) ∈ ℕ) → (𝑈‘(2 · (⌊‘((𝑘 + 1) / 2)))) = ((𝑆‘(⌊‘((𝑘 + 1) / 2))) + (𝑇‘(⌊‘((𝑘 + 1) / 2)))))
391	57, 390	syldan 593	. . 3 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (𝑈‘(2 · (⌊‘((𝑘 + 1) / 2)))) = ((𝑆‘(⌊‘((𝑘 + 1) / 2))) + (𝑇‘(⌊‘((𝑘 + 1) / 2)))))
392	63	adantr 483	. . . . . 6 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (vol*‘𝐴) ∈ ℝ)
393	392	recnd 10671	. . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (vol*‘𝐴) ∈ ℂ)
394	68	adantr 483	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → 𝐶 ∈ ℝ)
395	394	rehalfcld 11887	. . . . . 6 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (𝐶 / 2) ∈ ℝ)
396	395	recnd 10671	. . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (𝐶 / 2) ∈ ℂ)
397	65	adantr 483	. . . . . 6 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (vol*‘𝐵) ∈ ℝ)
398	397	recnd 10671	. . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (vol*‘𝐵) ∈ ℂ)
399	393, 396, 398, 396	add4d 10870	. . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (((vol‘𝐴) + (𝐶 / 2)) + ((vol‘𝐵) + (𝐶 / 2))) = (((vol‘𝐴) + (vol‘𝐵)) + ((𝐶 / 2) + (𝐶 / 2))))
400	394	recnd 10671	. . . . . 6 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → 𝐶 ∈ ℂ)
401	400	2halvesd 11886	. . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → ((𝐶 / 2) + (𝐶 / 2)) = 𝐶)
402	401	oveq2d 7174	. . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (((vol‘𝐴) + (vol‘𝐵)) + ((𝐶 / 2) + (𝐶 / 2))) = (((vol‘𝐴) + (vol‘𝐵)) + 𝐶))
403	399, 402	eqtr2d 2859	. . 3 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (((vol‘𝐴) + (vol‘𝐵)) + 𝐶) = (((vol‘𝐴) + (𝐶 / 2)) + ((vol‘𝐵) + (𝐶 / 2))))
404	168, 391, 403	3brtr4d 5100	. 2 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (𝑈‘(2 · (⌊‘((𝑘 + 1) / 2)))) ≤ (((vol‘𝐴) + (vol‘𝐵)) + 𝐶))
405	26, 61, 70, 100, 404	letrd 10799	1 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (𝑈‘𝑘) ≤ (((vol‘𝐴) + (vol‘𝐵)) + 𝐶))

Colors of variables: wff setvar class

Syntax hints: ¬ wn 3 → wi 4 ↔ wb 208 ∧ wa 398 = wceq 1537 ∈ wcel 2114 ≠ wne 3018 ∩ cin 3937 ⊆ wss 3938 ∅c0 4293 ifcif 4469 ∪ cuni 4840 class class class wbr 5068 ↦ cmpt 5148 × cxp 5555 dom cdm 5557 ran crn 5558 ∘ ccom 5561 Fn wfn 6352 ⟶wf 6353 ‘cfv 6357 (class class class)co 7158 1^st c1st 7689 2^nd c2nd 7690 ↑_m cmap 8408 supcsup 8906 ℂcc 10537 ℝcr 10538 0cc0 10539 1c1 10540 + caddc 10542 · cmul 10544 +∞cpnf 10674 -∞cmnf 10675 ℝ^*cxr 10676 < clt 10677 ≤ cle 10678 − cmin 10872 / cdiv 11299 ℕcn 11640 2c2 11695 ℤcz 11984 ℤ_≥cuz 12246 ℝ⁺crp 12392 (,)cioo 12741 [,)cico 12743 ...cfz 12895 ⌊cfl 13163 seqcseq 13372 abscabs 14595 vol*covol 24065

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2161 ax-12 2177 ax-ext 2795 ax-sep 5205 ax-nul 5212 ax-pow 5268 ax-pr 5332 ax-un 7463 ax-cnex 10595 ax-resscn 10596 ax-1cn 10597 ax-icn 10598 ax-addcl 10599 ax-addrcl 10600 ax-mulcl 10601 ax-mulrcl 10602 ax-mulcom 10603 ax-addass 10604 ax-mulass 10605 ax-distr 10606 ax-i2m1 10607 ax-1ne0 10608 ax-1rid 10609 ax-rnegex 10610 ax-rrecex 10611 ax-cnre 10612 ax-pre-lttri 10613 ax-pre-lttrn 10614 ax-pre-ltadd 10615 ax-pre-mulgt0 10616 ax-pre-sup 10617

This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3or 1084 df-3an 1085 df-tru 1540 df-ex 1781 df-nf 1785 df-sb 2070 df-mo 2622 df-eu 2654 df-clab 2802 df-cleq 2816 df-clel 2895 df-nfc 2965 df-ne 3019 df-nel 3126 df-ral 3145 df-rex 3146 df-reu 3147 df-rmo 3148 df-rab 3149 df-v 3498 df-sbc 3775 df-csb 3886 df-dif 3941 df-un 3943 df-in 3945 df-ss 3954 df-pss 3956 df-nul 4294 df-if 4470 df-pw 4543 df-sn 4570 df-pr 4572 df-tp 4574 df-op 4576 df-uni 4841 df-iun 4923 df-br 5069 df-opab 5131 df-mpt 5149 df-tr 5175 df-id 5462 df-eprel 5467 df-po 5476 df-so 5477 df-fr 5516 df-we 5518 df-xp 5563 df-rel 5564 df-cnv 5565 df-co 5566 df-dm 5567 df-rn 5568 df-res 5569 df-ima 5570 df-pred 6150 df-ord 6196 df-on 6197 df-lim 6198 df-suc 6199 df-iota 6316 df-fun 6359 df-fn 6360 df-f 6361 df-f1 6362 df-fo 6363 df-f1o 6364 df-fv 6365 df-riota 7116 df-ov 7161 df-oprab 7162 df-mpo 7163 df-om 7583 df-1st 7691 df-2nd 7692 df-wrecs 7949 df-recs 8010 df-rdg 8048 df-er 8291 df-map 8410 df-en 8512 df-dom 8513 df-sdom 8514 df-sup 8908 df-inf 8909 df-pnf 10679 df-mnf 10680 df-xr 10681 df-ltxr 10682 df-le 10683 df-sub 10874 df-neg 10875 df-div 11300 df-nn 11641 df-2 11703 df-3 11704 df-n0 11901 df-z 11985 df-uz 12247 df-rp 12393 df-ico 12747 df-fz 12896 df-fl 13165 df-seq 13373 df-exp 13433 df-cj 14460 df-re 14461 df-im 14462 df-sqrt 14596 df-abs 14597

This theorem is referenced by: ovolunlem1 24100

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