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Theorem hoidmv1lelem3 42860
Description: The dimensional volume of a 1-dimensional half-open interval is less than or equal the generalized sum of the dimensional volumes of countable half-open intervals that cover it. This is the nonempty, finite generalized sum, sub case in Lemma 114B of [Fremlin1] p. 23. (Contributed by Glauco Siliprandi, 21-Nov-2020.)
Hypotheses
Ref Expression
hoidmv1lelem3.a (𝜑𝐴 ∈ ℝ)
hoidmv1lelem3.b (𝜑𝐵 ∈ ℝ)
hoidmv1lelem3.l (𝜑𝐴 < 𝐵)
hoidmv1lelem3.c (𝜑𝐶:ℕ⟶ℝ)
hoidmv1lelem3.d (𝜑𝐷:ℕ⟶ℝ)
hoidmv1lelem3.x (𝜑 → (𝐴[,)𝐵) ⊆ 𝑗 ∈ ℕ ((𝐶𝑗)[,)(𝐷𝑗)))
hoidmv1lelem3.r (𝜑 → (Σ^‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶𝑗)[,)(𝐷𝑗))))) ∈ ℝ)
hoidmv1lelem3.u 𝑈 = {𝑧 ∈ (𝐴[,]𝐵) ∣ (𝑧𝐴) ≤ (Σ^‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶𝑗)[,)if((𝐷𝑗) ≤ 𝑧, (𝐷𝑗), 𝑧)))))}
hoidmv1lelem3.s 𝑆 = sup(𝑈, ℝ, < )
Assertion
Ref Expression
hoidmv1lelem3 (𝜑 → (𝐵𝐴) ≤ (Σ^‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶𝑗)[,)(𝐷𝑗))))))
Distinct variable groups:   𝐴,𝑗,𝑧   𝐵,𝑗,𝑧   𝐶,𝑗,𝑧   𝐷,𝑗,𝑧   𝑆,𝑗,𝑧   𝑈,𝑗,𝑧   𝜑,𝑗,𝑧

Proof of Theorem hoidmv1lelem3
Dummy variables 𝑦 𝑖 𝑢 𝑥 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 hoidmv1lelem3.b . . 3 (𝜑𝐵 ∈ ℝ)
2 hoidmv1lelem3.a . . 3 (𝜑𝐴 ∈ ℝ)
31, 2resubcld 11060 . 2 (𝜑 → (𝐵𝐴) ∈ ℝ)
4 nnex 11636 . . . . . . 7 ℕ ∈ V
54a1i 11 . . . . . 6 (𝜑 → ℕ ∈ V)
6 icossicc 12816 . . . . . . . 8 (0[,)+∞) ⊆ (0[,]+∞)
7 0xr 10680 . . . . . . . . . 10 0 ∈ ℝ*
87a1i 11 . . . . . . . . 9 ((𝜑𝑗 ∈ ℕ) → 0 ∈ ℝ*)
9 pnfxr 10687 . . . . . . . . . 10 +∞ ∈ ℝ*
109a1i 11 . . . . . . . . 9 ((𝜑𝑗 ∈ ℕ) → +∞ ∈ ℝ*)
11 hoidmv1lelem3.c . . . . . . . . . . . 12 (𝜑𝐶:ℕ⟶ℝ)
1211ffvelrnda 6844 . . . . . . . . . . 11 ((𝜑𝑗 ∈ ℕ) → (𝐶𝑗) ∈ ℝ)
13 hoidmv1lelem3.d . . . . . . . . . . . . 13 (𝜑𝐷:ℕ⟶ℝ)
1413ffvelrnda 6844 . . . . . . . . . . . 12 ((𝜑𝑗 ∈ ℕ) → (𝐷𝑗) ∈ ℝ)
151adantr 483 . . . . . . . . . . . 12 ((𝜑𝑗 ∈ ℕ) → 𝐵 ∈ ℝ)
1614, 15ifcld 4510 . . . . . . . . . . 11 ((𝜑𝑗 ∈ ℕ) → if((𝐷𝑗) ≤ 𝐵, (𝐷𝑗), 𝐵) ∈ ℝ)
17 volicore 42848 . . . . . . . . . . 11 (((𝐶𝑗) ∈ ℝ ∧ if((𝐷𝑗) ≤ 𝐵, (𝐷𝑗), 𝐵) ∈ ℝ) → (vol‘((𝐶𝑗)[,)if((𝐷𝑗) ≤ 𝐵, (𝐷𝑗), 𝐵))) ∈ ℝ)
1812, 16, 17syl2anc 586 . . . . . . . . . 10 ((𝜑𝑗 ∈ ℕ) → (vol‘((𝐶𝑗)[,)if((𝐷𝑗) ≤ 𝐵, (𝐷𝑗), 𝐵))) ∈ ℝ)
1918rexrd 10683 . . . . . . . . 9 ((𝜑𝑗 ∈ ℕ) → (vol‘((𝐶𝑗)[,)if((𝐷𝑗) ≤ 𝐵, (𝐷𝑗), 𝐵))) ∈ ℝ*)
2016rexrd 10683 . . . . . . . . . . 11 ((𝜑𝑗 ∈ ℕ) → if((𝐷𝑗) ≤ 𝐵, (𝐷𝑗), 𝐵) ∈ ℝ*)
21 icombl 24157 . . . . . . . . . . 11 (((𝐶𝑗) ∈ ℝ ∧ if((𝐷𝑗) ≤ 𝐵, (𝐷𝑗), 𝐵) ∈ ℝ*) → ((𝐶𝑗)[,)if((𝐷𝑗) ≤ 𝐵, (𝐷𝑗), 𝐵)) ∈ dom vol)
2212, 20, 21syl2anc 586 . . . . . . . . . 10 ((𝜑𝑗 ∈ ℕ) → ((𝐶𝑗)[,)if((𝐷𝑗) ≤ 𝐵, (𝐷𝑗), 𝐵)) ∈ dom vol)
23 volge0 42230 . . . . . . . . . 10 (((𝐶𝑗)[,)if((𝐷𝑗) ≤ 𝐵, (𝐷𝑗), 𝐵)) ∈ dom vol → 0 ≤ (vol‘((𝐶𝑗)[,)if((𝐷𝑗) ≤ 𝐵, (𝐷𝑗), 𝐵))))
2422, 23syl 17 . . . . . . . . 9 ((𝜑𝑗 ∈ ℕ) → 0 ≤ (vol‘((𝐶𝑗)[,)if((𝐷𝑗) ≤ 𝐵, (𝐷𝑗), 𝐵))))
2518ltpnfd 12508 . . . . . . . . 9 ((𝜑𝑗 ∈ ℕ) → (vol‘((𝐶𝑗)[,)if((𝐷𝑗) ≤ 𝐵, (𝐷𝑗), 𝐵))) < +∞)
268, 10, 19, 24, 25elicod 12779 . . . . . . . 8 ((𝜑𝑗 ∈ ℕ) → (vol‘((𝐶𝑗)[,)if((𝐷𝑗) ≤ 𝐵, (𝐷𝑗), 𝐵))) ∈ (0[,)+∞))
276, 26sseldi 3963 . . . . . . 7 ((𝜑𝑗 ∈ ℕ) → (vol‘((𝐶𝑗)[,)if((𝐷𝑗) ≤ 𝐵, (𝐷𝑗), 𝐵))) ∈ (0[,]+∞))
28 eqid 2819 . . . . . . 7 (𝑗 ∈ ℕ ↦ (vol‘((𝐶𝑗)[,)if((𝐷𝑗) ≤ 𝐵, (𝐷𝑗), 𝐵)))) = (𝑗 ∈ ℕ ↦ (vol‘((𝐶𝑗)[,)if((𝐷𝑗) ≤ 𝐵, (𝐷𝑗), 𝐵))))
2927, 28fmptd 6871 . . . . . 6 (𝜑 → (𝑗 ∈ ℕ ↦ (vol‘((𝐶𝑗)[,)if((𝐷𝑗) ≤ 𝐵, (𝐷𝑗), 𝐵)))):ℕ⟶(0[,]+∞))
305, 29sge0xrcl 42652 . . . . 5 (𝜑 → (Σ^‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶𝑗)[,)if((𝐷𝑗) ≤ 𝐵, (𝐷𝑗), 𝐵))))) ∈ ℝ*)
319a1i 11 . . . . 5 (𝜑 → +∞ ∈ ℝ*)
32 hoidmv1lelem3.r . . . . . . 7 (𝜑 → (Σ^‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶𝑗)[,)(𝐷𝑗))))) ∈ ℝ)
3332rexrd 10683 . . . . . 6 (𝜑 → (Σ^‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶𝑗)[,)(𝐷𝑗))))) ∈ ℝ*)
34 nfv 1908 . . . . . . 7 𝑗𝜑
35 volf 24122 . . . . . . . . 9 vol:dom vol⟶(0[,]+∞)
3635a1i 11 . . . . . . . 8 ((𝜑𝑗 ∈ ℕ) → vol:dom vol⟶(0[,]+∞))
3714rexrd 10683 . . . . . . . . 9 ((𝜑𝑗 ∈ ℕ) → (𝐷𝑗) ∈ ℝ*)
38 icombl 24157 . . . . . . . . 9 (((𝐶𝑗) ∈ ℝ ∧ (𝐷𝑗) ∈ ℝ*) → ((𝐶𝑗)[,)(𝐷𝑗)) ∈ dom vol)
3912, 37, 38syl2anc 586 . . . . . . . 8 ((𝜑𝑗 ∈ ℕ) → ((𝐶𝑗)[,)(𝐷𝑗)) ∈ dom vol)
4036, 39ffvelrnd 6845 . . . . . . 7 ((𝜑𝑗 ∈ ℕ) → (vol‘((𝐶𝑗)[,)(𝐷𝑗))) ∈ (0[,]+∞))
4112rexrd 10683 . . . . . . . . 9 ((𝜑𝑗 ∈ ℕ) → (𝐶𝑗) ∈ ℝ*)
4212leidd 11198 . . . . . . . . 9 ((𝜑𝑗 ∈ ℕ) → (𝐶𝑗) ≤ (𝐶𝑗))
43 min1 12574 . . . . . . . . . 10 (((𝐷𝑗) ∈ ℝ ∧ 𝐵 ∈ ℝ) → if((𝐷𝑗) ≤ 𝐵, (𝐷𝑗), 𝐵) ≤ (𝐷𝑗))
4414, 15, 43syl2anc 586 . . . . . . . . 9 ((𝜑𝑗 ∈ ℕ) → if((𝐷𝑗) ≤ 𝐵, (𝐷𝑗), 𝐵) ≤ (𝐷𝑗))
45 icossico 12798 . . . . . . . . 9 ((((𝐶𝑗) ∈ ℝ* ∧ (𝐷𝑗) ∈ ℝ*) ∧ ((𝐶𝑗) ≤ (𝐶𝑗) ∧ if((𝐷𝑗) ≤ 𝐵, (𝐷𝑗), 𝐵) ≤ (𝐷𝑗))) → ((𝐶𝑗)[,)if((𝐷𝑗) ≤ 𝐵, (𝐷𝑗), 𝐵)) ⊆ ((𝐶𝑗)[,)(𝐷𝑗)))
4641, 37, 42, 44, 45syl22anc 836 . . . . . . . 8 ((𝜑𝑗 ∈ ℕ) → ((𝐶𝑗)[,)if((𝐷𝑗) ≤ 𝐵, (𝐷𝑗), 𝐵)) ⊆ ((𝐶𝑗)[,)(𝐷𝑗)))
47 volss 24126 . . . . . . . 8 ((((𝐶𝑗)[,)if((𝐷𝑗) ≤ 𝐵, (𝐷𝑗), 𝐵)) ∈ dom vol ∧ ((𝐶𝑗)[,)(𝐷𝑗)) ∈ dom vol ∧ ((𝐶𝑗)[,)if((𝐷𝑗) ≤ 𝐵, (𝐷𝑗), 𝐵)) ⊆ ((𝐶𝑗)[,)(𝐷𝑗))) → (vol‘((𝐶𝑗)[,)if((𝐷𝑗) ≤ 𝐵, (𝐷𝑗), 𝐵))) ≤ (vol‘((𝐶𝑗)[,)(𝐷𝑗))))
4822, 39, 46, 47syl3anc 1365 . . . . . . 7 ((𝜑𝑗 ∈ ℕ) → (vol‘((𝐶𝑗)[,)if((𝐷𝑗) ≤ 𝐵, (𝐷𝑗), 𝐵))) ≤ (vol‘((𝐶𝑗)[,)(𝐷𝑗))))
4934, 5, 27, 40, 48sge0lempt 42677 . . . . . 6 (𝜑 → (Σ^‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶𝑗)[,)if((𝐷𝑗) ≤ 𝐵, (𝐷𝑗), 𝐵))))) ≤ (Σ^‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶𝑗)[,)(𝐷𝑗))))))
5032ltpnfd 12508 . . . . . 6 (𝜑 → (Σ^‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶𝑗)[,)(𝐷𝑗))))) < +∞)
5130, 33, 31, 49, 50xrlelttrd 12545 . . . . 5 (𝜑 → (Σ^‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶𝑗)[,)if((𝐷𝑗) ≤ 𝐵, (𝐷𝑗), 𝐵))))) < +∞)
5230, 31, 51xrltned 41609 . . . 4 (𝜑 → (Σ^‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶𝑗)[,)if((𝐷𝑗) ≤ 𝐵, (𝐷𝑗), 𝐵))))) ≠ +∞)
5352neneqd 3019 . . 3 (𝜑 → ¬ (Σ^‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶𝑗)[,)if((𝐷𝑗) ≤ 𝐵, (𝐷𝑗), 𝐵))))) = +∞)
545, 29sge0repnf 42653 . . 3 (𝜑 → ((Σ^‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶𝑗)[,)if((𝐷𝑗) ≤ 𝐵, (𝐷𝑗), 𝐵))))) ∈ ℝ ↔ ¬ (Σ^‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶𝑗)[,)if((𝐷𝑗) ≤ 𝐵, (𝐷𝑗), 𝐵))))) = +∞))
5553, 54mpbird 259 . 2 (𝜑 → (Σ^‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶𝑗)[,)if((𝐷𝑗) ≤ 𝐵, (𝐷𝑗), 𝐵))))) ∈ ℝ)
561rexrd 10683 . . . . . . 7 (𝜑𝐵 ∈ ℝ*)
572, 1iccssred 41764 . . . . . . . . 9 (𝜑 → (𝐴[,]𝐵) ⊆ ℝ)
58 hoidmv1lelem3.u . . . . . . . . . . 11 𝑈 = {𝑧 ∈ (𝐴[,]𝐵) ∣ (𝑧𝐴) ≤ (Σ^‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶𝑗)[,)if((𝐷𝑗) ≤ 𝑧, (𝐷𝑗), 𝑧)))))}
59 ssrab2 4054 . . . . . . . . . . 11 {𝑧 ∈ (𝐴[,]𝐵) ∣ (𝑧𝐴) ≤ (Σ^‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶𝑗)[,)if((𝐷𝑗) ≤ 𝑧, (𝐷𝑗), 𝑧)))))} ⊆ (𝐴[,]𝐵)
6058, 59eqsstri 3999 . . . . . . . . . 10 𝑈 ⊆ (𝐴[,]𝐵)
61 hoidmv1lelem3.l . . . . . . . . . . . 12 (𝜑𝐴 < 𝐵)
62 hoidmv1lelem3.s . . . . . . . . . . . 12 𝑆 = sup(𝑈, ℝ, < )
632, 1, 61, 11, 13, 32, 58, 62hoidmv1lelem1 42858 . . . . . . . . . . 11 (𝜑 → (𝑆𝑈𝐴𝑈 ∧ ∃𝑥 ∈ ℝ ∀𝑦𝑈 𝑦𝑥))
6463simp1d 1136 . . . . . . . . . 10 (𝜑𝑆𝑈)
6560, 64sseldi 3963 . . . . . . . . 9 (𝜑𝑆 ∈ (𝐴[,]𝐵))
6657, 65sseldd 3966 . . . . . . . 8 (𝜑𝑆 ∈ ℝ)
6766rexrd 10683 . . . . . . 7 (𝜑𝑆 ∈ ℝ*)
68 simpl 485 . . . . . . . . 9 ((𝜑 ∧ ¬ 𝐵𝑆) → 𝜑)
69 simpr 487 . . . . . . . . . 10 ((𝜑 ∧ ¬ 𝐵𝑆) → ¬ 𝐵𝑆)
7068, 66syl 17 . . . . . . . . . . 11 ((𝜑 ∧ ¬ 𝐵𝑆) → 𝑆 ∈ ℝ)
7168, 1syl 17 . . . . . . . . . . 11 ((𝜑 ∧ ¬ 𝐵𝑆) → 𝐵 ∈ ℝ)
7270, 71ltnled 10779 . . . . . . . . . 10 ((𝜑 ∧ ¬ 𝐵𝑆) → (𝑆 < 𝐵 ↔ ¬ 𝐵𝑆))
7369, 72mpbird 259 . . . . . . . . 9 ((𝜑 ∧ ¬ 𝐵𝑆) → 𝑆 < 𝐵)
74 hoidmv1lelem3.x . . . . . . . . . . . . 13 (𝜑 → (𝐴[,)𝐵) ⊆ 𝑗 ∈ ℕ ((𝐶𝑗)[,)(𝐷𝑗)))
7574adantr 483 . . . . . . . . . . . 12 ((𝜑𝑆 < 𝐵) → (𝐴[,)𝐵) ⊆ 𝑗 ∈ ℕ ((𝐶𝑗)[,)(𝐷𝑗)))
762rexrd 10683 . . . . . . . . . . . . . 14 (𝜑𝐴 ∈ ℝ*)
7776adantr 483 . . . . . . . . . . . . 13 ((𝜑𝑆 < 𝐵) → 𝐴 ∈ ℝ*)
7856adantr 483 . . . . . . . . . . . . 13 ((𝜑𝑆 < 𝐵) → 𝐵 ∈ ℝ*)
7967adantr 483 . . . . . . . . . . . . 13 ((𝜑𝑆 < 𝐵) → 𝑆 ∈ ℝ*)
8060, 57sstrid 3976 . . . . . . . . . . . . . . . 16 (𝜑𝑈 ⊆ ℝ)
8164ne0d 4299 . . . . . . . . . . . . . . . 16 (𝜑𝑈 ≠ ∅)
8263simp3d 1138 . . . . . . . . . . . . . . . 16 (𝜑 → ∃𝑥 ∈ ℝ ∀𝑦𝑈 𝑦𝑥)
8363simp2d 1137 . . . . . . . . . . . . . . . 16 (𝜑𝐴𝑈)
84 suprub 11594 . . . . . . . . . . . . . . . 16 (((𝑈 ⊆ ℝ ∧ 𝑈 ≠ ∅ ∧ ∃𝑥 ∈ ℝ ∀𝑦𝑈 𝑦𝑥) ∧ 𝐴𝑈) → 𝐴 ≤ sup(𝑈, ℝ, < ))
8580, 81, 82, 83, 84syl31anc 1367 . . . . . . . . . . . . . . 15 (𝜑𝐴 ≤ sup(𝑈, ℝ, < ))
8685, 62breqtrrdi 5099 . . . . . . . . . . . . . 14 (𝜑𝐴𝑆)
8786adantr 483 . . . . . . . . . . . . 13 ((𝜑𝑆 < 𝐵) → 𝐴𝑆)
88 simpr 487 . . . . . . . . . . . . 13 ((𝜑𝑆 < 𝐵) → 𝑆 < 𝐵)
8977, 78, 79, 87, 88elicod 12779 . . . . . . . . . . . 12 ((𝜑𝑆 < 𝐵) → 𝑆 ∈ (𝐴[,)𝐵))
9075, 89sseldd 3966 . . . . . . . . . . 11 ((𝜑𝑆 < 𝐵) → 𝑆 𝑗 ∈ ℕ ((𝐶𝑗)[,)(𝐷𝑗)))
91 eliun 4914 . . . . . . . . . . 11 (𝑆 𝑗 ∈ ℕ ((𝐶𝑗)[,)(𝐷𝑗)) ↔ ∃𝑗 ∈ ℕ 𝑆 ∈ ((𝐶𝑗)[,)(𝐷𝑗)))
9290, 91sylib 220 . . . . . . . . . 10 ((𝜑𝑆 < 𝐵) → ∃𝑗 ∈ ℕ 𝑆 ∈ ((𝐶𝑗)[,)(𝐷𝑗)))
932adantr 483 . . . . . . . . . . . . . 14 ((𝜑𝑆 < 𝐵) → 𝐴 ∈ ℝ)
94933ad2ant1 1127 . . . . . . . . . . . . 13 (((𝜑𝑆 < 𝐵) ∧ 𝑗 ∈ ℕ ∧ 𝑆 ∈ ((𝐶𝑗)[,)(𝐷𝑗))) → 𝐴 ∈ ℝ)
951adantr 483 . . . . . . . . . . . . . 14 ((𝜑𝑆 < 𝐵) → 𝐵 ∈ ℝ)
96953ad2ant1 1127 . . . . . . . . . . . . 13 (((𝜑𝑆 < 𝐵) ∧ 𝑗 ∈ ℕ ∧ 𝑆 ∈ ((𝐶𝑗)[,)(𝐷𝑗))) → 𝐵 ∈ ℝ)
9711adantr 483 . . . . . . . . . . . . . 14 ((𝜑𝑆 < 𝐵) → 𝐶:ℕ⟶ℝ)
98973ad2ant1 1127 . . . . . . . . . . . . 13 (((𝜑𝑆 < 𝐵) ∧ 𝑗 ∈ ℕ ∧ 𝑆 ∈ ((𝐶𝑗)[,)(𝐷𝑗))) → 𝐶:ℕ⟶ℝ)
9913adantr 483 . . . . . . . . . . . . . 14 ((𝜑𝑆 < 𝐵) → 𝐷:ℕ⟶ℝ)
100993ad2ant1 1127 . . . . . . . . . . . . 13 (((𝜑𝑆 < 𝐵) ∧ 𝑗 ∈ ℕ ∧ 𝑆 ∈ ((𝐶𝑗)[,)(𝐷𝑗))) → 𝐷:ℕ⟶ℝ)
101 fveq2 6663 . . . . . . . . . . . . . . . . . . . 20 (𝑖 = 𝑗 → (𝐶𝑖) = (𝐶𝑗))
102 fveq2 6663 . . . . . . . . . . . . . . . . . . . 20 (𝑖 = 𝑗 → (𝐷𝑖) = (𝐷𝑗))
103101, 102oveq12d 7166 . . . . . . . . . . . . . . . . . . 19 (𝑖 = 𝑗 → ((𝐶𝑖)[,)(𝐷𝑖)) = ((𝐶𝑗)[,)(𝐷𝑗)))
104103fveq2d 6667 . . . . . . . . . . . . . . . . . 18 (𝑖 = 𝑗 → (vol‘((𝐶𝑖)[,)(𝐷𝑖))) = (vol‘((𝐶𝑗)[,)(𝐷𝑗))))
105104cbvmptv 5160 . . . . . . . . . . . . . . . . 17 (𝑖 ∈ ℕ ↦ (vol‘((𝐶𝑖)[,)(𝐷𝑖)))) = (𝑗 ∈ ℕ ↦ (vol‘((𝐶𝑗)[,)(𝐷𝑗))))
106105fveq2i 6666 . . . . . . . . . . . . . . . 16 ^‘(𝑖 ∈ ℕ ↦ (vol‘((𝐶𝑖)[,)(𝐷𝑖))))) = (Σ^‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶𝑗)[,)(𝐷𝑗)))))
107106, 32eqeltrid 2915 . . . . . . . . . . . . . . 15 (𝜑 → (Σ^‘(𝑖 ∈ ℕ ↦ (vol‘((𝐶𝑖)[,)(𝐷𝑖))))) ∈ ℝ)
108107adantr 483 . . . . . . . . . . . . . 14 ((𝜑𝑆 < 𝐵) → (Σ^‘(𝑖 ∈ ℕ ↦ (vol‘((𝐶𝑖)[,)(𝐷𝑖))))) ∈ ℝ)
1091083ad2ant1 1127 . . . . . . . . . . . . 13 (((𝜑𝑆 < 𝐵) ∧ 𝑗 ∈ ℕ ∧ 𝑆 ∈ ((𝐶𝑗)[,)(𝐷𝑗))) → (Σ^‘(𝑖 ∈ ℕ ↦ (vol‘((𝐶𝑖)[,)(𝐷𝑖))))) ∈ ℝ)
110102breq1d 5067 . . . . . . . . . . . . . . . . . . . . . 22 (𝑖 = 𝑗 → ((𝐷𝑖) ≤ 𝑧 ↔ (𝐷𝑗) ≤ 𝑧))
111110, 102ifbieq1d 4488 . . . . . . . . . . . . . . . . . . . . 21 (𝑖 = 𝑗 → if((𝐷𝑖) ≤ 𝑧, (𝐷𝑖), 𝑧) = if((𝐷𝑗) ≤ 𝑧, (𝐷𝑗), 𝑧))
112101, 111oveq12d 7166 . . . . . . . . . . . . . . . . . . . 20 (𝑖 = 𝑗 → ((𝐶𝑖)[,)if((𝐷𝑖) ≤ 𝑧, (𝐷𝑖), 𝑧)) = ((𝐶𝑗)[,)if((𝐷𝑗) ≤ 𝑧, (𝐷𝑗), 𝑧)))
113112fveq2d 6667 . . . . . . . . . . . . . . . . . . 19 (𝑖 = 𝑗 → (vol‘((𝐶𝑖)[,)if((𝐷𝑖) ≤ 𝑧, (𝐷𝑖), 𝑧))) = (vol‘((𝐶𝑗)[,)if((𝐷𝑗) ≤ 𝑧, (𝐷𝑗), 𝑧))))
114113cbvmptv 5160 . . . . . . . . . . . . . . . . . 18 (𝑖 ∈ ℕ ↦ (vol‘((𝐶𝑖)[,)if((𝐷𝑖) ≤ 𝑧, (𝐷𝑖), 𝑧)))) = (𝑗 ∈ ℕ ↦ (vol‘((𝐶𝑗)[,)if((𝐷𝑗) ≤ 𝑧, (𝐷𝑗), 𝑧))))
115114eqcomi 2828 . . . . . . . . . . . . . . . . 17 (𝑗 ∈ ℕ ↦ (vol‘((𝐶𝑗)[,)if((𝐷𝑗) ≤ 𝑧, (𝐷𝑗), 𝑧)))) = (𝑖 ∈ ℕ ↦ (vol‘((𝐶𝑖)[,)if((𝐷𝑖) ≤ 𝑧, (𝐷𝑖), 𝑧))))
116115fveq2i 6666 . . . . . . . . . . . . . . . 16 ^‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶𝑗)[,)if((𝐷𝑗) ≤ 𝑧, (𝐷𝑗), 𝑧))))) = (Σ^‘(𝑖 ∈ ℕ ↦ (vol‘((𝐶𝑖)[,)if((𝐷𝑖) ≤ 𝑧, (𝐷𝑖), 𝑧)))))
117116breq2i 5065 . . . . . . . . . . . . . . 15 ((𝑧𝐴) ≤ (Σ^‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶𝑗)[,)if((𝐷𝑗) ≤ 𝑧, (𝐷𝑗), 𝑧))))) ↔ (𝑧𝐴) ≤ (Σ^‘(𝑖 ∈ ℕ ↦ (vol‘((𝐶𝑖)[,)if((𝐷𝑖) ≤ 𝑧, (𝐷𝑖), 𝑧))))))
118117rabbii 3472 . . . . . . . . . . . . . 14 {𝑧 ∈ (𝐴[,]𝐵) ∣ (𝑧𝐴) ≤ (Σ^‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶𝑗)[,)if((𝐷𝑗) ≤ 𝑧, (𝐷𝑗), 𝑧)))))} = {𝑧 ∈ (𝐴[,]𝐵) ∣ (𝑧𝐴) ≤ (Σ^‘(𝑖 ∈ ℕ ↦ (vol‘((𝐶𝑖)[,)if((𝐷𝑖) ≤ 𝑧, (𝐷𝑖), 𝑧)))))}
11958, 118eqtri 2842 . . . . . . . . . . . . 13 𝑈 = {𝑧 ∈ (𝐴[,]𝐵) ∣ (𝑧𝐴) ≤ (Σ^‘(𝑖 ∈ ℕ ↦ (vol‘((𝐶𝑖)[,)if((𝐷𝑖) ≤ 𝑧, (𝐷𝑖), 𝑧)))))}
12064adantr 483 . . . . . . . . . . . . . 14 ((𝜑𝑆 < 𝐵) → 𝑆𝑈)
1211203ad2ant1 1127 . . . . . . . . . . . . 13 (((𝜑𝑆 < 𝐵) ∧ 𝑗 ∈ ℕ ∧ 𝑆 ∈ ((𝐶𝑗)[,)(𝐷𝑗))) → 𝑆𝑈)
122873ad2ant1 1127 . . . . . . . . . . . . 13 (((𝜑𝑆 < 𝐵) ∧ 𝑗 ∈ ℕ ∧ 𝑆 ∈ ((𝐶𝑗)[,)(𝐷𝑗))) → 𝐴𝑆)
123883ad2ant1 1127 . . . . . . . . . . . . 13 (((𝜑𝑆 < 𝐵) ∧ 𝑗 ∈ ℕ ∧ 𝑆 ∈ ((𝐶𝑗)[,)(𝐷𝑗))) → 𝑆 < 𝐵)
124 simp2 1131 . . . . . . . . . . . . 13 (((𝜑𝑆 < 𝐵) ∧ 𝑗 ∈ ℕ ∧ 𝑆 ∈ ((𝐶𝑗)[,)(𝐷𝑗))) → 𝑗 ∈ ℕ)
125 simp3 1132 . . . . . . . . . . . . 13 (((𝜑𝑆 < 𝐵) ∧ 𝑗 ∈ ℕ ∧ 𝑆 ∈ ((𝐶𝑗)[,)(𝐷𝑗))) → 𝑆 ∈ ((𝐶𝑗)[,)(𝐷𝑗)))
126 eqid 2819 . . . . . . . . . . . . 13 if((𝐷𝑗) ≤ 𝐵, (𝐷𝑗), 𝐵) = if((𝐷𝑗) ≤ 𝐵, (𝐷𝑗), 𝐵)
12794, 96, 98, 100, 109, 119, 121, 122, 123, 124, 125, 126hoidmv1lelem2 42859 . . . . . . . . . . . 12 (((𝜑𝑆 < 𝐵) ∧ 𝑗 ∈ ℕ ∧ 𝑆 ∈ ((𝐶𝑗)[,)(𝐷𝑗))) → ∃𝑢𝑈 𝑆 < 𝑢)
1281273exp 1113 . . . . . . . . . . 11 ((𝜑𝑆 < 𝐵) → (𝑗 ∈ ℕ → (𝑆 ∈ ((𝐶𝑗)[,)(𝐷𝑗)) → ∃𝑢𝑈 𝑆 < 𝑢)))
129128rexlimdv 3281 . . . . . . . . . 10 ((𝜑𝑆 < 𝐵) → (∃𝑗 ∈ ℕ 𝑆 ∈ ((𝐶𝑗)[,)(𝐷𝑗)) → ∃𝑢𝑈 𝑆 < 𝑢))
13092, 129mpd 15 . . . . . . . . 9 ((𝜑𝑆 < 𝐵) → ∃𝑢𝑈 𝑆 < 𝑢)
13168, 73, 130syl2anc 586 . . . . . . . 8 ((𝜑 ∧ ¬ 𝐵𝑆) → ∃𝑢𝑈 𝑆 < 𝑢)
13257adantr 483 . . . . . . . . . . . . . . 15 ((𝜑𝑢𝑈) → (𝐴[,]𝐵) ⊆ ℝ)
13360, 132sstrid 3976 . . . . . . . . . . . . . 14 ((𝜑𝑢𝑈) → 𝑈 ⊆ ℝ)
13481adantr 483 . . . . . . . . . . . . . 14 ((𝜑𝑢𝑈) → 𝑈 ≠ ∅)
1352, 1jca 514 . . . . . . . . . . . . . . . . 17 (𝜑 → (𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ))
136135adantr 483 . . . . . . . . . . . . . . . 16 ((𝜑𝑢𝑈) → (𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ))
13760a1i 11 . . . . . . . . . . . . . . . 16 ((𝜑𝑢𝑈) → 𝑈 ⊆ (𝐴[,]𝐵))
13864adantr 483 . . . . . . . . . . . . . . . 16 ((𝜑𝑢𝑈) → 𝑆𝑈)
139 iccsupr 12822 . . . . . . . . . . . . . . . 16 (((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) ∧ 𝑈 ⊆ (𝐴[,]𝐵) ∧ 𝑆𝑈) → (𝑈 ⊆ ℝ ∧ 𝑈 ≠ ∅ ∧ ∃𝑥 ∈ ℝ ∀𝑦𝑈 𝑦𝑥))
140136, 137, 138, 139syl3anc 1365 . . . . . . . . . . . . . . 15 ((𝜑𝑢𝑈) → (𝑈 ⊆ ℝ ∧ 𝑈 ≠ ∅ ∧ ∃𝑥 ∈ ℝ ∀𝑦𝑈 𝑦𝑥))
141140simp3d 1138 . . . . . . . . . . . . . 14 ((𝜑𝑢𝑈) → ∃𝑥 ∈ ℝ ∀𝑦𝑈 𝑦𝑥)
142 simpr 487 . . . . . . . . . . . . . 14 ((𝜑𝑢𝑈) → 𝑢𝑈)
143 suprub 11594 . . . . . . . . . . . . . 14 (((𝑈 ⊆ ℝ ∧ 𝑈 ≠ ∅ ∧ ∃𝑥 ∈ ℝ ∀𝑦𝑈 𝑦𝑥) ∧ 𝑢𝑈) → 𝑢 ≤ sup(𝑈, ℝ, < ))
144133, 134, 141, 142, 143syl31anc 1367 . . . . . . . . . . . . 13 ((𝜑𝑢𝑈) → 𝑢 ≤ sup(𝑈, ℝ, < ))
145144, 62breqtrrdi 5099 . . . . . . . . . . . 12 ((𝜑𝑢𝑈) → 𝑢𝑆)
146145ralrimiva 3180 . . . . . . . . . . 11 (𝜑 → ∀𝑢𝑈 𝑢𝑆)
14760sseli 3961 . . . . . . . . . . . . . . 15 (𝑢𝑈𝑢 ∈ (𝐴[,]𝐵))
148147adantl 484 . . . . . . . . . . . . . 14 ((𝜑𝑢𝑈) → 𝑢 ∈ (𝐴[,]𝐵))
149132, 148sseldd 3966 . . . . . . . . . . . . 13 ((𝜑𝑢𝑈) → 𝑢 ∈ ℝ)
15066adantr 483 . . . . . . . . . . . . 13 ((𝜑𝑢𝑈) → 𝑆 ∈ ℝ)
151149, 150lenltd 10778 . . . . . . . . . . . 12 ((𝜑𝑢𝑈) → (𝑢𝑆 ↔ ¬ 𝑆 < 𝑢))
152151ralbidva 3194 . . . . . . . . . . 11 (𝜑 → (∀𝑢𝑈 𝑢𝑆 ↔ ∀𝑢𝑈 ¬ 𝑆 < 𝑢))
153146, 152mpbid 234 . . . . . . . . . 10 (𝜑 → ∀𝑢𝑈 ¬ 𝑆 < 𝑢)
154 ralnex 3234 . . . . . . . . . 10 (∀𝑢𝑈 ¬ 𝑆 < 𝑢 ↔ ¬ ∃𝑢𝑈 𝑆 < 𝑢)
155153, 154sylib 220 . . . . . . . . 9 (𝜑 → ¬ ∃𝑢𝑈 𝑆 < 𝑢)
156155adantr 483 . . . . . . . 8 ((𝜑 ∧ ¬ 𝐵𝑆) → ¬ ∃𝑢𝑈 𝑆 < 𝑢)
157131, 156condan 816 . . . . . . 7 (𝜑𝐵𝑆)
158 iccleub 12784 . . . . . . . 8 ((𝐴 ∈ ℝ*𝐵 ∈ ℝ*𝑆 ∈ (𝐴[,]𝐵)) → 𝑆𝐵)
15976, 56, 65, 158syl3anc 1365 . . . . . . 7 (𝜑𝑆𝐵)
16056, 67, 157, 159xrletrid 12540 . . . . . 6 (𝜑𝐵 = 𝑆)
161160, 64eqeltrd 2911 . . . . 5 (𝜑𝐵𝑈)
162161, 58eleqtrdi 2921 . . . 4 (𝜑𝐵 ∈ {𝑧 ∈ (𝐴[,]𝐵) ∣ (𝑧𝐴) ≤ (Σ^‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶𝑗)[,)if((𝐷𝑗) ≤ 𝑧, (𝐷𝑗), 𝑧)))))})
163 oveq1 7155 . . . . . 6 (𝑧 = 𝐵 → (𝑧𝐴) = (𝐵𝐴))
164 breq2 5061 . . . . . . . . . . 11 (𝑧 = 𝐵 → ((𝐷𝑗) ≤ 𝑧 ↔ (𝐷𝑗) ≤ 𝐵))
165 id 22 . . . . . . . . . . 11 (𝑧 = 𝐵𝑧 = 𝐵)
166164, 165ifbieq2d 4490 . . . . . . . . . 10 (𝑧 = 𝐵 → if((𝐷𝑗) ≤ 𝑧, (𝐷𝑗), 𝑧) = if((𝐷𝑗) ≤ 𝐵, (𝐷𝑗), 𝐵))
167166oveq2d 7164 . . . . . . . . 9 (𝑧 = 𝐵 → ((𝐶𝑗)[,)if((𝐷𝑗) ≤ 𝑧, (𝐷𝑗), 𝑧)) = ((𝐶𝑗)[,)if((𝐷𝑗) ≤ 𝐵, (𝐷𝑗), 𝐵)))
168167fveq2d 6667 . . . . . . . 8 (𝑧 = 𝐵 → (vol‘((𝐶𝑗)[,)if((𝐷𝑗) ≤ 𝑧, (𝐷𝑗), 𝑧))) = (vol‘((𝐶𝑗)[,)if((𝐷𝑗) ≤ 𝐵, (𝐷𝑗), 𝐵))))
169168mpteq2dv 5153 . . . . . . 7 (𝑧 = 𝐵 → (𝑗 ∈ ℕ ↦ (vol‘((𝐶𝑗)[,)if((𝐷𝑗) ≤ 𝑧, (𝐷𝑗), 𝑧)))) = (𝑗 ∈ ℕ ↦ (vol‘((𝐶𝑗)[,)if((𝐷𝑗) ≤ 𝐵, (𝐷𝑗), 𝐵)))))
170169fveq2d 6667 . . . . . 6 (𝑧 = 𝐵 → (Σ^‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶𝑗)[,)if((𝐷𝑗) ≤ 𝑧, (𝐷𝑗), 𝑧))))) = (Σ^‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶𝑗)[,)if((𝐷𝑗) ≤ 𝐵, (𝐷𝑗), 𝐵))))))
171163, 170breq12d 5070 . . . . 5 (𝑧 = 𝐵 → ((𝑧𝐴) ≤ (Σ^‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶𝑗)[,)if((𝐷𝑗) ≤ 𝑧, (𝐷𝑗), 𝑧))))) ↔ (𝐵𝐴) ≤ (Σ^‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶𝑗)[,)if((𝐷𝑗) ≤ 𝐵, (𝐷𝑗), 𝐵)))))))
172171elrab 3678 . . . 4 (𝐵 ∈ {𝑧 ∈ (𝐴[,]𝐵) ∣ (𝑧𝐴) ≤ (Σ^‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶𝑗)[,)if((𝐷𝑗) ≤ 𝑧, (𝐷𝑗), 𝑧)))))} ↔ (𝐵 ∈ (𝐴[,]𝐵) ∧ (𝐵𝐴) ≤ (Σ^‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶𝑗)[,)if((𝐷𝑗) ≤ 𝐵, (𝐷𝑗), 𝐵)))))))
173162, 172sylib 220 . . 3 (𝜑 → (𝐵 ∈ (𝐴[,]𝐵) ∧ (𝐵𝐴) ≤ (Σ^‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶𝑗)[,)if((𝐷𝑗) ≤ 𝐵, (𝐷𝑗), 𝐵)))))))
174173simprd 498 . 2 (𝜑 → (𝐵𝐴) ≤ (Σ^‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶𝑗)[,)if((𝐷𝑗) ≤ 𝐵, (𝐷𝑗), 𝐵))))))
1753, 55, 32, 174, 49letrd 10789 1 (𝜑 → (𝐵𝐴) ≤ (Σ^‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶𝑗)[,)(𝐷𝑗))))))
Colors of variables: wff setvar class
Syntax hints:  ¬ wn 3  wi 4  wa 398  w3a 1081   = wceq 1530  wcel 2107  wne 3014  wral 3136  wrex 3137  {crab 3140  Vcvv 3493  wss 3934  c0 4289  ifcif 4465   ciun 4910   class class class wbr 5057  cmpt 5137  dom cdm 5548  wf 6344  cfv 6348  (class class class)co 7148  supcsup 8896  cr 10528  0cc0 10529  +∞cpnf 10664  *cxr 10666   < clt 10667  cle 10668  cmin 10862  cn 11630  [,)cico 12732  [,]cicc 12733  volcvol 24056  Σ^csumge0 42629
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1789  ax-4 1803  ax-5 1904  ax-6 1963  ax-7 2008  ax-8 2109  ax-9 2117  ax-10 2138  ax-11 2153  ax-12 2169  ax-ext 2791  ax-rep 5181  ax-sep 5194  ax-nul 5201  ax-pow 5257  ax-pr 5320  ax-un 7453  ax-inf2 9096  ax-cnex 10585  ax-resscn 10586  ax-1cn 10587  ax-icn 10588  ax-addcl 10589  ax-addrcl 10590  ax-mulcl 10591  ax-mulrcl 10592  ax-mulcom 10593  ax-addass 10594  ax-mulass 10595  ax-distr 10596  ax-i2m1 10597  ax-1ne0 10598  ax-1rid 10599  ax-rnegex 10600  ax-rrecex 10601  ax-cnre 10602  ax-pre-lttri 10603  ax-pre-lttrn 10604  ax-pre-ltadd 10605  ax-pre-mulgt0 10606  ax-pre-sup 10607
This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3or 1082  df-3an 1083  df-tru 1533  df-fal 1543  df-ex 1774  df-nf 1778  df-sb 2063  df-mo 2616  df-eu 2648  df-clab 2798  df-cleq 2812  df-clel 2891  df-nfc 2961  df-ne 3015  df-nel 3122  df-ral 3141  df-rex 3142  df-reu 3143  df-rmo 3144  df-rab 3145  df-v 3495  df-sbc 3771  df-csb 3882  df-dif 3937  df-un 3939  df-in 3941  df-ss 3950  df-pss 3952  df-nul 4290  df-if 4466  df-pw 4539  df-sn 4560  df-pr 4562  df-tp 4564  df-op 4566  df-uni 4831  df-int 4868  df-iun 4912  df-br 5058  df-opab 5120  df-mpt 5138  df-tr 5164  df-id 5453  df-eprel 5458  df-po 5467  df-so 5468  df-fr 5507  df-se 5508  df-we 5509  df-xp 5554  df-rel 5555  df-cnv 5556  df-co 5557  df-dm 5558  df-rn 5559  df-res 5560  df-ima 5561  df-pred 6141  df-ord 6187  df-on 6188  df-lim 6189  df-suc 6190  df-iota 6307  df-fun 6350  df-fn 6351  df-f 6352  df-f1 6353  df-fo 6354  df-f1o 6355  df-fv 6356  df-isom 6357  df-riota 7106  df-ov 7151  df-oprab 7152  df-mpo 7153  df-of 7401  df-om 7573  df-1st 7681  df-2nd 7682  df-wrecs 7939  df-recs 8000  df-rdg 8038  df-1o 8094  df-2o 8095  df-oadd 8098  df-er 8281  df-map 8400  df-pm 8401  df-en 8502  df-dom 8503  df-sdom 8504  df-fin 8505  df-fi 8867  df-sup 8898  df-inf 8899  df-oi 8966  df-dju 9322  df-card 9360  df-pnf 10669  df-mnf 10670  df-xr 10671  df-ltxr 10672  df-le 10673  df-sub 10864  df-neg 10865  df-div 11290  df-nn 11631  df-2 11692  df-3 11693  df-n0 11890  df-z 11974  df-uz 12236  df-q 12341  df-rp 12382  df-xneg 12499  df-xadd 12500  df-xmul 12501  df-ioo 12734  df-ico 12736  df-icc 12737  df-fz 12885  df-fzo 13026  df-fl 13154  df-seq 13362  df-exp 13422  df-hash 13683  df-cj 14450  df-re 14451  df-im 14452  df-sqrt 14586  df-abs 14587  df-clim 14837  df-rlim 14838  df-sum 15035  df-rest 16688  df-topgen 16709  df-psmet 20529  df-xmet 20530  df-met 20531  df-bl 20532  df-mopn 20533  df-top 21494  df-topon 21511  df-bases 21546  df-cmp 21987  df-ovol 24057  df-vol 24058  df-sumge0 42630
This theorem is referenced by:  hoidmv1le  42861
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