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Theorem hoidmv1le 46579
Description: The dimensional volume of a 1-dimensional half-open interval is less than or equal to the generalized sum of the dimensional volumes of countable half-open intervals that cover it. This is one of the two base cases of the induction of Lemma 115B of [Fremlin1] p. 29 (the other base case is the 0-dimensional case). This proof of the 1-dimensional case is given in Lemma 114B of [Fremlin1] p. 23. (Contributed by Glauco Siliprandi, 21-Nov-2020.)
Hypotheses
Ref Expression
hoidmv1le.l 𝐿 = (𝑥 ∈ Fin ↦ (𝑎 ∈ (ℝ ↑m 𝑥), 𝑏 ∈ (ℝ ↑m 𝑥) ↦ if(𝑥 = ∅, 0, ∏𝑘 ∈ 𝑥 (vol‘((𝑎‘𝑘)[,)(𝑏‘𝑘))))))
hoidmv1le.z (𝜑 → 𝑍 ∈ 𝑉)
hoidmv1le.x 𝑋 = {𝑍}
hoidmv1le.a (𝜑 → 𝐴:𝑋⟶ℝ)
hoidmv1le.b (𝜑 → 𝐵:𝑋⟶ℝ)
hoidmv1le.c (𝜑 → 𝐶:ℕ⟶(ℝ ↑m 𝑋))
hoidmv1le.d (𝜑 → 𝐷:ℕ⟶(ℝ ↑m 𝑋))
hoidmv1le.s (𝜑 → X𝑘 ∈ 𝑋 ((𝐴‘𝑘)[,)(𝐵‘𝑘)) ⊆ ∪ 𝑗 ∈ ℕ X𝑘 ∈ 𝑋 (((𝐶‘𝑗)‘𝑘)[,)((𝐷‘𝑗)‘𝑘)))
Assertion
Ref Expression
hoidmv1le (𝜑 → (𝐴(𝐿‘𝑋)𝐵) ≤ (Σ^‘(𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)(𝐿‘𝑋)(𝐷‘𝑗)))))
Distinct variable groups:   𝐴,𝑎,𝑏,𝑗,𝑘,𝑥   𝐵,𝑎,𝑏,𝑗,𝑘,𝑥   𝐶,𝑎,𝑏,𝑗,𝑘,𝑥   𝐷,𝑎,𝑏,𝑗,𝑘,𝑥   𝑘,𝑉   𝑋,𝑎,𝑏,𝑘,𝑥   𝑗,𝑍,𝑘,𝑥   𝜑,𝑎,𝑏,𝑗,𝑥
Allowed substitution hints:   𝜑(𝑘)   𝐿(𝑥,𝑗,𝑘,𝑎,𝑏)   𝑉(𝑥,𝑗,𝑎,𝑏)   𝑋(𝑗)   𝑍(𝑎,𝑏)
Proof of Theorem hoidmv1le
Dummy variables 𝑖 𝑤 𝑧 𝑦 𝑙 ℎ are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 hoidmv1le.b . . . . . . . . . 10 (𝜑 → 𝐵:𝑋⟶ℝ)
2 hoidmv1le.z . . . . . . . . . . . 12 (𝜑 → 𝑍 ∈ 𝑉)
3 snidg 4614 . . . . . . . . . . . 12 (𝑍 ∈ 𝑉 → 𝑍 ∈ {𝑍})
42, 3syl 17 . . . . . . . . . . 11 (𝜑 → 𝑍 ∈ {𝑍})
5 hoidmv1le.x . . . . . . . . . . 11 𝑋 = {𝑍}
64, 5eleqtrrdi 2839 . . . . . . . . . 10 (𝜑 → 𝑍 ∈ 𝑋)
71, 6ffvelcdmd 7023 . . . . . . . . 9 (𝜑 → (𝐵‘𝑍) ∈ ℝ)
8 hoidmv1le.a . . . . . . . . . 10 (𝜑 → 𝐴:𝑋⟶ℝ)
98, 6ffvelcdmd 7023 . . . . . . . . 9 (𝜑 → (𝐴‘𝑍) ∈ ℝ)
107, 9resubcld 11566 . . . . . . . 8 (𝜑 → ((𝐵‘𝑍) − (𝐴‘𝑍)) ∈ ℝ)
1110rexrd 11184 . . . . . . 7 (𝜑 → ((𝐵‘𝑍) − (𝐴‘𝑍)) ∈ ℝ*)
12 pnfxr 11188 . . . . . . . 8 +∞ ∈ ℝ*
1312a1i 11 . . . . . . 7 (𝜑 → +∞ ∈ ℝ*)
1410ltpnfd 13041 . . . . . . 7 (𝜑 → ((𝐵‘𝑍) − (𝐴‘𝑍)) < +∞)
1511, 13, 14xrltled 13070 . . . . . 6 (𝜑 → ((𝐵‘𝑍) − (𝐴‘𝑍)) ≤ +∞)
1615ad2antrr 726 . . . . 5 (((𝜑 ∧ (𝐴‘𝑍) < (𝐵‘𝑍)) ∧ (Σ^‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))) = +∞) → ((𝐵‘𝑍) − (𝐴‘𝑍)) ≤ +∞)
17 id 22 . . . . . . 7 ((Σ^‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))) = +∞ → (Σ^‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))) = +∞)
1817eqcomd 2735 . . . . . 6 ((Σ^‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))) = +∞ → +∞ = (Σ^‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))))
1918adantl 481 . . . . 5 (((𝜑 ∧ (𝐴‘𝑍) < (𝐵‘𝑍)) ∧ (Σ^‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))) = +∞) → +∞ = (Σ^‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))))
2016, 19breqtrd 5121 . . . 4 (((𝜑 ∧ (𝐴‘𝑍) < (𝐵‘𝑍)) ∧ (Σ^‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))) = +∞) → ((𝐵‘𝑍) − (𝐴‘𝑍)) ≤ (Σ^‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))))
21 simpl 482 . . . . 5 (((𝜑 ∧ (𝐴‘𝑍) < (𝐵‘𝑍)) ∧ ¬ (Σ^‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))) = +∞) → (𝜑 ∧ (𝐴‘𝑍) < (𝐵‘𝑍)))
22 simpr 484 . . . . . 6 (((𝜑 ∧ (𝐴‘𝑍) < (𝐵‘𝑍)) ∧ ¬ (Σ^‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))) = +∞) → ¬ (Σ^‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))) = +∞)
23 nnex 12152 . . . . . . . 8 ℕ ∈ V
2423a1i 11 . . . . . . 7 (((𝜑 ∧ (𝐴‘𝑍) < (𝐵‘𝑍)) ∧ ¬ (Σ^‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))) = +∞) → ℕ ∈ V)
25 hoidmv1le.l . . . . . . . . . . . 12 𝐿 = (𝑥 ∈ Fin ↦ (𝑎 ∈ (ℝ ↑m 𝑥), 𝑏 ∈ (ℝ ↑m 𝑥) ↦ if(𝑥 = ∅, 0, ∏𝑘 ∈ 𝑥 (vol‘((𝑎‘𝑘)[,)(𝑏‘𝑘))))))
265a1i 11 . . . . . . . . . . . . . 14 (𝜑 → 𝑋 = {𝑍})
27 snfi 8975 . . . . . . . . . . . . . . 15 {𝑍} ∈ Fin
2827a1i 11 . . . . . . . . . . . . . 14 (𝜑 → {𝑍} ∈ Fin)
2926, 28eqeltrd 2828 . . . . . . . . . . . . 13 (𝜑 → 𝑋 ∈ Fin)
3029adantr 480 . . . . . . . . . . . 12 ((𝜑 ∧ 𝑗 ∈ ℕ) → 𝑋 ∈ Fin)
316ne0d 4295 . . . . . . . . . . . . 13 (𝜑 → 𝑋 ≠ ∅)
3231adantr 480 . . . . . . . . . . . 12 ((𝜑 ∧ 𝑗 ∈ ℕ) → 𝑋 ≠ ∅)
33 hoidmv1le.c . . . . . . . . . . . . . 14 (𝜑 → 𝐶:ℕ⟶(ℝ ↑m 𝑋))
3433ffvelcdmda 7022 . . . . . . . . . . . . 13 ((𝜑 ∧ 𝑗 ∈ ℕ) → (𝐶‘𝑗) ∈ (ℝ ↑m 𝑋))
35 elmapi 8783 . . . . . . . . . . . . 13 ((𝐶‘𝑗) ∈ (ℝ ↑m 𝑋) → (𝐶‘𝑗):𝑋⟶ℝ)
3634, 35syl 17 . . . . . . . . . . . 12 ((𝜑 ∧ 𝑗 ∈ ℕ) → (𝐶‘𝑗):𝑋⟶ℝ)
37 hoidmv1le.d . . . . . . . . . . . . . 14 (𝜑 → 𝐷:ℕ⟶(ℝ ↑m 𝑋))
3837ffvelcdmda 7022 . . . . . . . . . . . . 13 ((𝜑 ∧ 𝑗 ∈ ℕ) → (𝐷‘𝑗) ∈ (ℝ ↑m 𝑋))
39 elmapi 8783 . . . . . . . . . . . . 13 ((𝐷‘𝑗) ∈ (ℝ ↑m 𝑋) → (𝐷‘𝑗):𝑋⟶ℝ)
4038, 39syl 17 . . . . . . . . . . . 12 ((𝜑 ∧ 𝑗 ∈ ℕ) → (𝐷‘𝑗):𝑋⟶ℝ)
4125, 30, 32, 36, 40hoidmvn0val 46569 . . . . . . . . . . 11 ((𝜑 ∧ 𝑗 ∈ ℕ) → ((𝐶‘𝑗)(𝐿‘𝑋)(𝐷‘𝑗)) = ∏𝑘 ∈ 𝑋 (vol‘(((𝐶‘𝑗)‘𝑘)[,)((𝐷‘𝑗)‘𝑘))))
425prodeq1i 15841 . . . . . . . . . . . 12 ∏𝑘 ∈ 𝑋 (vol‘(((𝐶‘𝑗)‘𝑘)[,)((𝐷‘𝑗)‘𝑘))) = ∏𝑘 ∈ {𝑍} (vol‘(((𝐶‘𝑗)‘𝑘)[,)((𝐷‘𝑗)‘𝑘)))
4342a1i 11 . . . . . . . . . . 11 ((𝜑 ∧ 𝑗 ∈ ℕ) → ∏𝑘 ∈ 𝑋 (vol‘(((𝐶‘𝑗)‘𝑘)[,)((𝐷‘𝑗)‘𝑘))) = ∏𝑘 ∈ {𝑍} (vol‘(((𝐶‘𝑗)‘𝑘)[,)((𝐷‘𝑗)‘𝑘))))
442adantr 480 . . . . . . . . . . . 12 ((𝜑 ∧ 𝑗 ∈ ℕ) → 𝑍 ∈ 𝑉)
456adantr 480 . . . . . . . . . . . . . . 15 ((𝜑 ∧ 𝑗 ∈ ℕ) → 𝑍 ∈ 𝑋)
4636, 45ffvelcdmd 7023 . . . . . . . . . . . . . 14 ((𝜑 ∧ 𝑗 ∈ ℕ) → ((𝐶‘𝑗)‘𝑍) ∈ ℝ)
4740, 45ffvelcdmd 7023 . . . . . . . . . . . . . 14 ((𝜑 ∧ 𝑗 ∈ ℕ) → ((𝐷‘𝑗)‘𝑍) ∈ ℝ)
48 volicore 46566 . . . . . . . . . . . . . 14 ((((𝐶‘𝑗)‘𝑍) ∈ ℝ ∧ ((𝐷‘𝑗)‘𝑍) ∈ ℝ) → (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))) ∈ ℝ)
4946, 47, 48syl2anc 584 . . . . . . . . . . . . 13 ((𝜑 ∧ 𝑗 ∈ ℕ) → (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))) ∈ ℝ)
5049recnd 11162 . . . . . . . . . . . 12 ((𝜑 ∧ 𝑗 ∈ ℕ) → (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))) ∈ ℂ)
51 fveq2 6826 . . . . . . . . . . . . . . 15 (𝑘 = 𝑍 → ((𝐶‘𝑗)‘𝑘) = ((𝐶‘𝑗)‘𝑍))
52 fveq2 6826 . . . . . . . . . . . . . . 15 (𝑘 = 𝑍 → ((𝐷‘𝑗)‘𝑘) = ((𝐷‘𝑗)‘𝑍))
5351, 52oveq12d 7371 . . . . . . . . . . . . . 14 (𝑘 = 𝑍 → (((𝐶‘𝑗)‘𝑘)[,)((𝐷‘𝑗)‘𝑘)) = (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)))
5453fveq2d 6830 . . . . . . . . . . . . 13 (𝑘 = 𝑍 → (vol‘(((𝐶‘𝑗)‘𝑘)[,)((𝐷‘𝑗)‘𝑘))) = (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))
5554prodsn 15887 . . . . . . . . . . . 12 ((𝑍 ∈ 𝑉 ∧ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))) ∈ ℂ) → ∏𝑘 ∈ {𝑍} (vol‘(((𝐶‘𝑗)‘𝑘)[,)((𝐷‘𝑗)‘𝑘))) = (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))
5644, 50, 55syl2anc 584 . . . . . . . . . . 11 ((𝜑 ∧ 𝑗 ∈ ℕ) → ∏𝑘 ∈ {𝑍} (vol‘(((𝐶‘𝑗)‘𝑘)[,)((𝐷‘𝑗)‘𝑘))) = (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))
5741, 43, 563eqtrd 2768 . . . . . . . . . 10 ((𝜑 ∧ 𝑗 ∈ ℕ) → ((𝐶‘𝑗)(𝐿‘𝑋)(𝐷‘𝑗)) = (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))
5857mpteq2dva 5188 . . . . . . . . 9 (𝜑 → (𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)(𝐿‘𝑋)(𝐷‘𝑗))) = (𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)))))
59 fveq2 6826 . . . . . . . . . . . . . . . . . . . 20 (𝑘 = 𝑙 → (𝑎‘𝑘) = (𝑎‘𝑙))
60 fveq2 6826 . . . . . . . . . . . . . . . . . . . 20 (𝑘 = 𝑙 → (𝑏‘𝑘) = (𝑏‘𝑙))
6159, 60oveq12d 7371 . . . . . . . . . . . . . . . . . . 19 (𝑘 = 𝑙 → ((𝑎‘𝑘)[,)(𝑏‘𝑘)) = ((𝑎‘𝑙)[,)(𝑏‘𝑙)))
6261fveq2d 6830 . . . . . . . . . . . . . . . . . 18 (𝑘 = 𝑙 → (vol‘((𝑎‘𝑘)[,)(𝑏‘𝑘))) = (vol‘((𝑎‘𝑙)[,)(𝑏‘𝑙))))
6362cbvprodv 15839 . . . . . . . . . . . . . . . . 17 ∏𝑘 ∈ 𝑥 (vol‘((𝑎‘𝑘)[,)(𝑏‘𝑘))) = ∏𝑙 ∈ 𝑥 (vol‘((𝑎‘𝑙)[,)(𝑏‘𝑙)))
64 ifeq2 4483 . . . . . . . . . . . . . . . . 17 (∏𝑘 ∈ 𝑥 (vol‘((𝑎‘𝑘)[,)(𝑏‘𝑘))) = ∏𝑙 ∈ 𝑥 (vol‘((𝑎‘𝑙)[,)(𝑏‘𝑙))) → if(𝑥 = ∅, 0, ∏𝑘 ∈ 𝑥 (vol‘((𝑎‘𝑘)[,)(𝑏‘𝑘)))) = if(𝑥 = ∅, 0, ∏𝑙 ∈ 𝑥 (vol‘((𝑎‘𝑙)[,)(𝑏‘𝑙)))))
6563, 64ax-mp 5 . . . . . . . . . . . . . . . 16 if(𝑥 = ∅, 0, ∏𝑘 ∈ 𝑥 (vol‘((𝑎‘𝑘)[,)(𝑏‘𝑘)))) = if(𝑥 = ∅, 0, ∏𝑙 ∈ 𝑥 (vol‘((𝑎‘𝑙)[,)(𝑏‘𝑙))))
6665a1i 11 . . . . . . . . . . . . . . 15 ((𝑎 ∈ (ℝ ↑m 𝑥) ∧ 𝑏 ∈ (ℝ ↑m 𝑥)) → if(𝑥 = ∅, 0, ∏𝑘 ∈ 𝑥 (vol‘((𝑎‘𝑘)[,)(𝑏‘𝑘)))) = if(𝑥 = ∅, 0, ∏𝑙 ∈ 𝑥 (vol‘((𝑎‘𝑙)[,)(𝑏‘𝑙)))))
6766mpoeq3ia 7431 . . . . . . . . . . . . . 14 (𝑎 ∈ (ℝ ↑m 𝑥), 𝑏 ∈ (ℝ ↑m 𝑥) ↦ if(𝑥 = ∅, 0, ∏𝑘 ∈ 𝑥 (vol‘((𝑎‘𝑘)[,)(𝑏‘𝑘))))) = (𝑎 ∈ (ℝ ↑m 𝑥), 𝑏 ∈ (ℝ ↑m 𝑥) ↦ if(𝑥 = ∅, 0, ∏𝑙 ∈ 𝑥 (vol‘((𝑎‘𝑙)[,)(𝑏‘𝑙)))))
6867mpteq2i 5191 . . . . . . . . . . . . 13 (𝑥 ∈ Fin ↦ (𝑎 ∈ (ℝ ↑m 𝑥), 𝑏 ∈ (ℝ ↑m 𝑥) ↦ if(𝑥 = ∅, 0, ∏𝑘 ∈ 𝑥 (vol‘((𝑎‘𝑘)[,)(𝑏‘𝑘)))))) = (𝑥 ∈ Fin ↦ (𝑎 ∈ (ℝ ↑m 𝑥), 𝑏 ∈ (ℝ ↑m 𝑥) ↦ if(𝑥 = ∅, 0, ∏𝑙 ∈ 𝑥 (vol‘((𝑎‘𝑙)[,)(𝑏‘𝑙))))))
6925, 68eqtri 2752 . . . . . . . . . . . 12 𝐿 = (𝑥 ∈ Fin ↦ (𝑎 ∈ (ℝ ↑m 𝑥), 𝑏 ∈ (ℝ ↑m 𝑥) ↦ if(𝑥 = ∅, 0, ∏𝑙 ∈ 𝑥 (vol‘((𝑎‘𝑙)[,)(𝑏‘𝑙))))))
7069, 30, 36, 40hoidmvcl 46567 . . . . . . . . . . 11 ((𝜑 ∧ 𝑗 ∈ ℕ) → ((𝐶‘𝑗)(𝐿‘𝑋)(𝐷‘𝑗)) ∈ (0[,)+∞))
71 eqid 2729 . . . . . . . . . . 11 (𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)(𝐿‘𝑋)(𝐷‘𝑗))) = (𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)(𝐿‘𝑋)(𝐷‘𝑗)))
7270, 71fmptd 7052 . . . . . . . . . 10 (𝜑 → (𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)(𝐿‘𝑋)(𝐷‘𝑗))):ℕ⟶(0[,)+∞))
73 icossicc 13357 . . . . . . . . . . 11 (0[,)+∞) ⊆ (0[,]+∞)
7473a1i 11 . . . . . . . . . 10 (𝜑 → (0[,)+∞) ⊆ (0[,]+∞))
7572, 74fssd 6673 . . . . . . . . 9 (𝜑 → (𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)(𝐿‘𝑋)(𝐷‘𝑗))):ℕ⟶(0[,]+∞))
7658, 75feq1dd 6639 . . . . . . . 8 (𝜑 → (𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)))):ℕ⟶(0[,]+∞))
7776ad2antrr 726 . . . . . . 7 (((𝜑 ∧ (𝐴‘𝑍) < (𝐵‘𝑍)) ∧ ¬ (Σ^‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))) = +∞) → (𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)))):ℕ⟶(0[,]+∞))
7824, 77sge0repnf 46371 . . . . . 6 (((𝜑 ∧ (𝐴‘𝑍) < (𝐵‘𝑍)) ∧ ¬ (Σ^‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))) = +∞) → ((Σ^‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))) ∈ ℝ ↔ ¬ (Σ^‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))) = +∞))
7922, 78mpbird 257 . . . . 5 (((𝜑 ∧ (𝐴‘𝑍) < (𝐵‘𝑍)) ∧ ¬ (Σ^‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))) = +∞) → (Σ^‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))) ∈ ℝ)
809ad2antrr 726 . . . . . . 7 (((𝜑 ∧ (𝐴‘𝑍) < (𝐵‘𝑍)) ∧ (Σ^‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))) ∈ ℝ) → (𝐴‘𝑍) ∈ ℝ)
817ad2antrr 726 . . . . . . 7 (((𝜑 ∧ (𝐴‘𝑍) < (𝐵‘𝑍)) ∧ (Σ^‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))) ∈ ℝ) → (𝐵‘𝑍) ∈ ℝ)
82 simplr 768 . . . . . . 7 (((𝜑 ∧ (𝐴‘𝑍) < (𝐵‘𝑍)) ∧ (Σ^‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))) ∈ ℝ) → (𝐴‘𝑍) < (𝐵‘𝑍))
83 eqid 2729 . . . . . . . . 9 (𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)‘𝑍)) = (𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)‘𝑍))
8446, 83fmptd 7052 . . . . . . . 8 (𝜑 → (𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)‘𝑍)):ℕ⟶ℝ)
8584ad2antrr 726 . . . . . . 7 (((𝜑 ∧ (𝐴‘𝑍) < (𝐵‘𝑍)) ∧ (Σ^‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))) ∈ ℝ) → (𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)‘𝑍)):ℕ⟶ℝ)
86 eqid 2729 . . . . . . . . 9 (𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍)) = (𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))
8747, 86fmptd 7052 . . . . . . . 8 (𝜑 → (𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍)):ℕ⟶ℝ)
8887ad2antrr 726 . . . . . . 7 (((𝜑 ∧ (𝐴‘𝑍) < (𝐵‘𝑍)) ∧ (Σ^‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))) ∈ ℝ) → (𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍)):ℕ⟶ℝ)
89 hoidmv1le.s . . . . . . . . . . . . . . . . 17 (𝜑 → X𝑘 ∈ 𝑋 ((𝐴‘𝑘)[,)(𝐵‘𝑘)) ⊆ ∪ 𝑗 ∈ ℕ X𝑘 ∈ 𝑋 (((𝐶‘𝑗)‘𝑘)[,)((𝐷‘𝑗)‘𝑘)))
905eleq2i 2820 . . . . . . . . . . . . . . . . . . . . . . . . 25 (𝑘 ∈ 𝑋 ↔ 𝑘 ∈ {𝑍})
9190biimpi 216 . . . . . . . . . . . . . . . . . . . . . . . 24 (𝑘 ∈ 𝑋 → 𝑘 ∈ {𝑍})
92 elsni 4596 . . . . . . . . . . . . . . . . . . . . . . . 24 (𝑘 ∈ {𝑍} → 𝑘 = 𝑍)
9391, 92syl 17 . . . . . . . . . . . . . . . . . . . . . . 23 (𝑘 ∈ 𝑋 → 𝑘 = 𝑍)
9493, 53syl 17 . . . . . . . . . . . . . . . . . . . . . 22 (𝑘 ∈ 𝑋 → (((𝐶‘𝑗)‘𝑘)[,)((𝐷‘𝑗)‘𝑘)) = (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)))
9594rgen 3046 . . . . . . . . . . . . . . . . . . . . 21 ∀𝑘 ∈ 𝑋 (((𝐶‘𝑗)‘𝑘)[,)((𝐷‘𝑗)‘𝑘)) = (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))
96 ixpeq2 8845 . . . . . . . . . . . . . . . . . . . . 21 (∀𝑘 ∈ 𝑋 (((𝐶‘𝑗)‘𝑘)[,)((𝐷‘𝑗)‘𝑘)) = (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)) → X𝑘 ∈ 𝑋 (((𝐶‘𝑗)‘𝑘)[,)((𝐷‘𝑗)‘𝑘)) = X𝑘 ∈ 𝑋 (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)))
9795, 96ax-mp 5 . . . . . . . . . . . . . . . . . . . 20 X𝑘 ∈ 𝑋 (((𝐶‘𝑗)‘𝑘)[,)((𝐷‘𝑗)‘𝑘)) = X𝑘 ∈ 𝑋 (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))
9897a1i 11 . . . . . . . . . . . . . . . . . . 19 (𝑗 ∈ ℕ → X𝑘 ∈ 𝑋 (((𝐶‘𝑗)‘𝑘)[,)((𝐷‘𝑗)‘𝑘)) = X𝑘 ∈ 𝑋 (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)))
9998iuneq2i 4966 . . . . . . . . . . . . . . . . . 18 ∪ 𝑗 ∈ ℕ X𝑘 ∈ 𝑋 (((𝐶‘𝑗)‘𝑘)[,)((𝐷‘𝑗)‘𝑘)) = ∪ 𝑗 ∈ ℕ X𝑘 ∈ 𝑋 (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))
10099a1i 11 . . . . . . . . . . . . . . . . 17 (𝜑 → ∪ 𝑗 ∈ ℕ X𝑘 ∈ 𝑋 (((𝐶‘𝑗)‘𝑘)[,)((𝐷‘𝑗)‘𝑘)) = ∪ 𝑗 ∈ ℕ X𝑘 ∈ 𝑋 (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)))
10189, 100sseqtrd 3974 . . . . . . . . . . . . . . . 16 (𝜑 → X𝑘 ∈ 𝑋 ((𝐴‘𝑘)[,)(𝐵‘𝑘)) ⊆ ∪ 𝑗 ∈ ℕ X𝑘 ∈ 𝑋 (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)))
102101adantr 480 . . . . . . . . . . . . . . 15 ((𝜑 ∧ 𝑥 ∈ ((𝐴‘𝑍)[,)(𝐵‘𝑍))) → X𝑘 ∈ 𝑋 ((𝐴‘𝑘)[,)(𝐵‘𝑘)) ⊆ ∪ 𝑗 ∈ ℕ X𝑘 ∈ 𝑋 (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)))
103 id 22 . . . . . . . . . . . . . . . . . . 19 (𝑥 ∈ ((𝐴‘𝑍)[,)(𝐵‘𝑍)) → 𝑥 ∈ ((𝐴‘𝑍)[,)(𝐵‘𝑍)))
104 eqidd 2730 . . . . . . . . . . . . . . . . . . 19 (𝑥 ∈ ((𝐴‘𝑍)[,)(𝐵‘𝑍)) → {⟨𝑍, 𝑥⟩} = {⟨𝑍, 𝑥⟩})
105 opeq2 4828 . . . . . . . . . . . . . . . . . . . . 21 (𝑦 = 𝑥 → ⟨𝑍, 𝑦⟩ = ⟨𝑍, 𝑥⟩)
106105sneqd 4591 . . . . . . . . . . . . . . . . . . . 20 (𝑦 = 𝑥 → {⟨𝑍, 𝑦⟩} = {⟨𝑍, 𝑥⟩})
107106rspceeqv 3602 . . . . . . . . . . . . . . . . . . 19 ((𝑥 ∈ ((𝐴‘𝑍)[,)(𝐵‘𝑍)) ∧ {⟨𝑍, 𝑥⟩} = {⟨𝑍, 𝑥⟩}) → ∃𝑦 ∈ ((𝐴‘𝑍)[,)(𝐵‘𝑍)){⟨𝑍, 𝑥⟩} = {⟨𝑍, 𝑦⟩})
108103, 104, 107syl2anc 584 . . . . . . . . . . . . . . . . . 18 (𝑥 ∈ ((𝐴‘𝑍)[,)(𝐵‘𝑍)) → ∃𝑦 ∈ ((𝐴‘𝑍)[,)(𝐵‘𝑍)){⟨𝑍, 𝑥⟩} = {⟨𝑍, 𝑦⟩})
109108adantl 481 . . . . . . . . . . . . . . . . 17 ((𝜑 ∧ 𝑥 ∈ ((𝐴‘𝑍)[,)(𝐵‘𝑍))) → ∃𝑦 ∈ ((𝐴‘𝑍)[,)(𝐵‘𝑍)){⟨𝑍, 𝑥⟩} = {⟨𝑍, 𝑦⟩})
110 elixpsn 8871 . . . . . . . . . . . . . . . . . . 19 (𝑍 ∈ 𝑉 → ({⟨𝑍, 𝑥⟩} ∈ X𝑘 ∈ {𝑍} ((𝐴‘𝑍)[,)(𝐵‘𝑍)) ↔ ∃𝑦 ∈ ((𝐴‘𝑍)[,)(𝐵‘𝑍)){⟨𝑍, 𝑥⟩} = {⟨𝑍, 𝑦⟩}))
1112, 110syl 17 . . . . . . . . . . . . . . . . . 18 (𝜑 → ({⟨𝑍, 𝑥⟩} ∈ X𝑘 ∈ {𝑍} ((𝐴‘𝑍)[,)(𝐵‘𝑍)) ↔ ∃𝑦 ∈ ((𝐴‘𝑍)[,)(𝐵‘𝑍)){⟨𝑍, 𝑥⟩} = {⟨𝑍, 𝑦⟩}))
112111adantr 480 . . . . . . . . . . . . . . . . 17 ((𝜑 ∧ 𝑥 ∈ ((𝐴‘𝑍)[,)(𝐵‘𝑍))) → ({⟨𝑍, 𝑥⟩} ∈ X𝑘 ∈ {𝑍} ((𝐴‘𝑍)[,)(𝐵‘𝑍)) ↔ ∃𝑦 ∈ ((𝐴‘𝑍)[,)(𝐵‘𝑍)){⟨𝑍, 𝑥⟩} = {⟨𝑍, 𝑦⟩}))
113109, 112mpbird 257 . . . . . . . . . . . . . . . 16 ((𝜑 ∧ 𝑥 ∈ ((𝐴‘𝑍)[,)(𝐵‘𝑍))) → {⟨𝑍, 𝑥⟩} ∈ X𝑘 ∈ {𝑍} ((𝐴‘𝑍)[,)(𝐵‘𝑍)))
1145eqcomi 2738 . . . . . . . . . . . . . . . . . . . 20 {𝑍} = 𝑋
115 ixpeq1 8842 . . . . . . . . . . . . . . . . . . . 20 ({𝑍} = 𝑋 → X𝑘 ∈ {𝑍} ((𝐴‘𝑍)[,)(𝐵‘𝑍)) = X𝑘 ∈ 𝑋 ((𝐴‘𝑍)[,)(𝐵‘𝑍)))
116114, 115ax-mp 5 . . . . . . . . . . . . . . . . . . 19 X𝑘 ∈ {𝑍} ((𝐴‘𝑍)[,)(𝐵‘𝑍)) = X𝑘 ∈ 𝑋 ((𝐴‘𝑍)[,)(𝐵‘𝑍))
117 fveq2 6826 . . . . . . . . . . . . . . . . . . . . . . . 24 (𝑘 = 𝑍 → (𝐴‘𝑘) = (𝐴‘𝑍))
11893, 117syl 17 . . . . . . . . . . . . . . . . . . . . . . 23 (𝑘 ∈ 𝑋 → (𝐴‘𝑘) = (𝐴‘𝑍))
119 fveq2 6826 . . . . . . . . . . . . . . . . . . . . . . . 24 (𝑘 = 𝑍 → (𝐵‘𝑘) = (𝐵‘𝑍))
12093, 119syl 17 . . . . . . . . . . . . . . . . . . . . . . 23 (𝑘 ∈ 𝑋 → (𝐵‘𝑘) = (𝐵‘𝑍))
121118, 120oveq12d 7371 . . . . . . . . . . . . . . . . . . . . . 22 (𝑘 ∈ 𝑋 → ((𝐴‘𝑘)[,)(𝐵‘𝑘)) = ((𝐴‘𝑍)[,)(𝐵‘𝑍)))
122121eqcomd 2735 . . . . . . . . . . . . . . . . . . . . 21 (𝑘 ∈ 𝑋 → ((𝐴‘𝑍)[,)(𝐵‘𝑍)) = ((𝐴‘𝑘)[,)(𝐵‘𝑘)))
123122rgen 3046 . . . . . . . . . . . . . . . . . . . 20 ∀𝑘 ∈ 𝑋 ((𝐴‘𝑍)[,)(𝐵‘𝑍)) = ((𝐴‘𝑘)[,)(𝐵‘𝑘))
124 ixpeq2 8845 . . . . . . . . . . . . . . . . . . . 20 (∀𝑘 ∈ 𝑋 ((𝐴‘𝑍)[,)(𝐵‘𝑍)) = ((𝐴‘𝑘)[,)(𝐵‘𝑘)) → X𝑘 ∈ 𝑋 ((𝐴‘𝑍)[,)(𝐵‘𝑍)) = X𝑘 ∈ 𝑋 ((𝐴‘𝑘)[,)(𝐵‘𝑘)))
125123, 124ax-mp 5 . . . . . . . . . . . . . . . . . . 19 X𝑘 ∈ 𝑋 ((𝐴‘𝑍)[,)(𝐵‘𝑍)) = X𝑘 ∈ 𝑋 ((𝐴‘𝑘)[,)(𝐵‘𝑘))
126116, 125eqtri 2752 . . . . . . . . . . . . . . . . . 18 X𝑘 ∈ {𝑍} ((𝐴‘𝑍)[,)(𝐵‘𝑍)) = X𝑘 ∈ 𝑋 ((𝐴‘𝑘)[,)(𝐵‘𝑘))
127126a1i 11 . . . . . . . . . . . . . . . . 17 (𝜑 → X𝑘 ∈ {𝑍} ((𝐴‘𝑍)[,)(𝐵‘𝑍)) = X𝑘 ∈ 𝑋 ((𝐴‘𝑘)[,)(𝐵‘𝑘)))
128127adantr 480 . . . . . . . . . . . . . . . 16 ((𝜑 ∧ 𝑥 ∈ ((𝐴‘𝑍)[,)(𝐵‘𝑍))) → X𝑘 ∈ {𝑍} ((𝐴‘𝑍)[,)(𝐵‘𝑍)) = X𝑘 ∈ 𝑋 ((𝐴‘𝑘)[,)(𝐵‘𝑘)))
129113, 128eleqtrd 2830 . . . . . . . . . . . . . . 15 ((𝜑 ∧ 𝑥 ∈ ((𝐴‘𝑍)[,)(𝐵‘𝑍))) → {⟨𝑍, 𝑥⟩} ∈ X𝑘 ∈ 𝑋 ((𝐴‘𝑘)[,)(𝐵‘𝑘)))
130102, 129sseldd 3938 . . . . . . . . . . . . . 14 ((𝜑 ∧ 𝑥 ∈ ((𝐴‘𝑍)[,)(𝐵‘𝑍))) → {⟨𝑍, 𝑥⟩} ∈ ∪ 𝑗 ∈ ℕ X𝑘 ∈ 𝑋 (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)))
131 eliun 4948 . . . . . . . . . . . . . 14 ({⟨𝑍, 𝑥⟩} ∈ ∪ 𝑗 ∈ ℕ X𝑘 ∈ 𝑋 (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)) ↔ ∃𝑗 ∈ ℕ {⟨𝑍, 𝑥⟩} ∈ X𝑘 ∈ 𝑋 (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)))
132130, 131sylib 218 . . . . . . . . . . . . 13 ((𝜑 ∧ 𝑥 ∈ ((𝐴‘𝑍)[,)(𝐵‘𝑍))) → ∃𝑗 ∈ ℕ {⟨𝑍, 𝑥⟩} ∈ X𝑘 ∈ 𝑋 (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)))
133 ixpeq1 8842 . . . . . . . . . . . . . . . . . . . . . 22 (𝑋 = {𝑍} → X𝑘 ∈ 𝑋 (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)) = X𝑘 ∈ {𝑍} (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)))
1345, 133ax-mp 5 . . . . . . . . . . . . . . . . . . . . 21 X𝑘 ∈ 𝑋 (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)) = X𝑘 ∈ {𝑍} (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))
135134eleq2i 2820 . . . . . . . . . . . . . . . . . . . 20 ({⟨𝑍, 𝑥⟩} ∈ X𝑘 ∈ 𝑋 (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)) ↔ {⟨𝑍, 𝑥⟩} ∈ X𝑘 ∈ {𝑍} (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)))
136135biimpi 216 . . . . . . . . . . . . . . . . . . 19 ({⟨𝑍, 𝑥⟩} ∈ X𝑘 ∈ 𝑋 (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)) → {⟨𝑍, 𝑥⟩} ∈ X𝑘 ∈ {𝑍} (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)))
137136adantl 481 . . . . . . . . . . . . . . . . . 18 ((𝜑 ∧ {⟨𝑍, 𝑥⟩} ∈ X𝑘 ∈ 𝑋 (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))) → {⟨𝑍, 𝑥⟩} ∈ X𝑘 ∈ {𝑍} (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)))
138 elixpsn 8871 . . . . . . . . . . . . . . . . . . . 20 (𝑍 ∈ 𝑉 → ({⟨𝑍, 𝑥⟩} ∈ X𝑘 ∈ {𝑍} (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)) ↔ ∃𝑦 ∈ (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)){⟨𝑍, 𝑥⟩} = {⟨𝑍, 𝑦⟩}))
1392, 138syl 17 . . . . . . . . . . . . . . . . . . 19 (𝜑 → ({⟨𝑍, 𝑥⟩} ∈ X𝑘 ∈ {𝑍} (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)) ↔ ∃𝑦 ∈ (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)){⟨𝑍, 𝑥⟩} = {⟨𝑍, 𝑦⟩}))
140139adantr 480 . . . . . . . . . . . . . . . . . 18 ((𝜑 ∧ {⟨𝑍, 𝑥⟩} ∈ X𝑘 ∈ 𝑋 (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))) → ({⟨𝑍, 𝑥⟩} ∈ X𝑘 ∈ {𝑍} (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)) ↔ ∃𝑦 ∈ (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)){⟨𝑍, 𝑥⟩} = {⟨𝑍, 𝑦⟩}))
141137, 140mpbid 232 . . . . . . . . . . . . . . . . 17 ((𝜑 ∧ {⟨𝑍, 𝑥⟩} ∈ X𝑘 ∈ 𝑋 (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))) → ∃𝑦 ∈ (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)){⟨𝑍, 𝑥⟩} = {⟨𝑍, 𝑦⟩})
142 opex 5411 . . . . . . . . . . . . . . . . . . . . . . . . . 26 ⟨𝑍, 𝑥⟩ ∈ V
143142sneqr 4794 . . . . . . . . . . . . . . . . . . . . . . . . 25 ({⟨𝑍, 𝑥⟩} = {⟨𝑍, 𝑦⟩} → ⟨𝑍, 𝑥⟩ = ⟨𝑍, 𝑦⟩)
144143adantl 481 . . . . . . . . . . . . . . . . . . . . . . . 24 ((𝜑 ∧ {⟨𝑍, 𝑥⟩} = {⟨𝑍, 𝑦⟩}) → ⟨𝑍, 𝑥⟩ = ⟨𝑍, 𝑦⟩)
145 vex 3442 . . . . . . . . . . . . . . . . . . . . . . . . . . 27 𝑥 ∈ V
146145a1i 11 . . . . . . . . . . . . . . . . . . . . . . . . . 26 (𝜑 → 𝑥 ∈ V)
147 opthg 5424 . . . . . . . . . . . . . . . . . . . . . . . . . 26 ((𝑍 ∈ 𝑉 ∧ 𝑥 ∈ V) → (⟨𝑍, 𝑥⟩ = ⟨𝑍, 𝑦⟩ ↔ (𝑍 = 𝑍 ∧ 𝑥 = 𝑦)))
1482, 146, 147syl2anc 584 . . . . . . . . . . . . . . . . . . . . . . . . 25 (𝜑 → (⟨𝑍, 𝑥⟩ = ⟨𝑍, 𝑦⟩ ↔ (𝑍 = 𝑍 ∧ 𝑥 = 𝑦)))
149148adantr 480 . . . . . . . . . . . . . . . . . . . . . . . 24 ((𝜑 ∧ {⟨𝑍, 𝑥⟩} = {⟨𝑍, 𝑦⟩}) → (⟨𝑍, 𝑥⟩ = ⟨𝑍, 𝑦⟩ ↔ (𝑍 = 𝑍 ∧ 𝑥 = 𝑦)))
150144, 149mpbid 232 . . . . . . . . . . . . . . . . . . . . . . 23 ((𝜑 ∧ {⟨𝑍, 𝑥⟩} = {⟨𝑍, 𝑦⟩}) → (𝑍 = 𝑍 ∧ 𝑥 = 𝑦))
151150simprd 495 . . . . . . . . . . . . . . . . . . . . . 22 ((𝜑 ∧ {⟨𝑍, 𝑥⟩} = {⟨𝑍, 𝑦⟩}) → 𝑥 = 𝑦)
1521513adant2 1131 . . . . . . . . . . . . . . . . . . . . 21 ((𝜑 ∧ 𝑦 ∈ (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)) ∧ {⟨𝑍, 𝑥⟩} = {⟨𝑍, 𝑦⟩}) → 𝑥 = 𝑦)
153 simp2 1137 . . . . . . . . . . . . . . . . . . . . 21 ((𝜑 ∧ 𝑦 ∈ (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)) ∧ {⟨𝑍, 𝑥⟩} = {⟨𝑍, 𝑦⟩}) → 𝑦 ∈ (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)))
154152, 153eqeltrd 2828 . . . . . . . . . . . . . . . . . . . 20 ((𝜑 ∧ 𝑦 ∈ (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)) ∧ {⟨𝑍, 𝑥⟩} = {⟨𝑍, 𝑦⟩}) → 𝑥 ∈ (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)))
1551543exp 1119 . . . . . . . . . . . . . . . . . . 19 (𝜑 → (𝑦 ∈ (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)) → ({⟨𝑍, 𝑥⟩} = {⟨𝑍, 𝑦⟩} → 𝑥 ∈ (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)))))
156155adantr 480 . . . . . . . . . . . . . . . . . 18 ((𝜑 ∧ {⟨𝑍, 𝑥⟩} ∈ X𝑘 ∈ 𝑋 (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))) → (𝑦 ∈ (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)) → ({⟨𝑍, 𝑥⟩} = {⟨𝑍, 𝑦⟩} → 𝑥 ∈ (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)))))
157156rexlimdv 3128 . . . . . . . . . . . . . . . . 17 ((𝜑 ∧ {⟨𝑍, 𝑥⟩} ∈ X𝑘 ∈ 𝑋 (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))) → (∃𝑦 ∈ (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)){⟨𝑍, 𝑥⟩} = {⟨𝑍, 𝑦⟩} → 𝑥 ∈ (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))
158141, 157mpd 15 . . . . . . . . . . . . . . . 16 ((𝜑 ∧ {⟨𝑍, 𝑥⟩} ∈ X𝑘 ∈ 𝑋 (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))) → 𝑥 ∈ (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)))
159158ex 412 . . . . . . . . . . . . . . 15 (𝜑 → ({⟨𝑍, 𝑥⟩} ∈ X𝑘 ∈ 𝑋 (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)) → 𝑥 ∈ (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))
160159ad2antrr 726 . . . . . . . . . . . . . 14 (((𝜑 ∧ 𝑥 ∈ ((𝐴‘𝑍)[,)(𝐵‘𝑍))) ∧ 𝑗 ∈ ℕ) → ({⟨𝑍, 𝑥⟩} ∈ X𝑘 ∈ 𝑋 (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)) → 𝑥 ∈ (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))
161160reximdva 3142 . . . . . . . . . . . . 13 ((𝜑 ∧ 𝑥 ∈ ((𝐴‘𝑍)[,)(𝐵‘𝑍))) → (∃𝑗 ∈ ℕ {⟨𝑍, 𝑥⟩} ∈ X𝑘 ∈ 𝑋 (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)) → ∃𝑗 ∈ ℕ 𝑥 ∈ (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))
162132, 161mpd 15 . . . . . . . . . . . 12 ((𝜑 ∧ 𝑥 ∈ ((𝐴‘𝑍)[,)(𝐵‘𝑍))) → ∃𝑗 ∈ ℕ 𝑥 ∈ (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)))
163 eliun 4948 . . . . . . . . . . . 12 (𝑥 ∈ ∪ 𝑗 ∈ ℕ (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)) ↔ ∃𝑗 ∈ ℕ 𝑥 ∈ (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)))
164162, 163sylibr 234 . . . . . . . . . . 11 ((𝜑 ∧ 𝑥 ∈ ((𝐴‘𝑍)[,)(𝐵‘𝑍))) → 𝑥 ∈ ∪ 𝑗 ∈ ℕ (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)))
165164ralrimiva 3121 . . . . . . . . . 10 (𝜑 → ∀𝑥 ∈ ((𝐴‘𝑍)[,)(𝐵‘𝑍))𝑥 ∈ ∪ 𝑗 ∈ ℕ (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)))
166 dfss3 3926 . . . . . . . . . 10 (((𝐴‘𝑍)[,)(𝐵‘𝑍)) ⊆ ∪ 𝑗 ∈ ℕ (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)) ↔ ∀𝑥 ∈ ((𝐴‘𝑍)[,)(𝐵‘𝑍))𝑥 ∈ ∪ 𝑗 ∈ ℕ (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)))
167165, 166sylibr 234 . . . . . . . . 9 (𝜑 → ((𝐴‘𝑍)[,)(𝐵‘𝑍)) ⊆ ∪ 𝑗 ∈ ℕ (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)))
168 eqidd 2730 . . . . . . . . . . . . 13 ((𝜑 ∧ 𝑖 ∈ ℕ) → (𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)‘𝑍)) = (𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)‘𝑍)))
169 fveq2 6826 . . . . . . . . . . . . . . 15 (𝑗 = 𝑖 → (𝐶‘𝑗) = (𝐶‘𝑖))
170169fveq1d 6828 . . . . . . . . . . . . . 14 (𝑗 = 𝑖 → ((𝐶‘𝑗)‘𝑍) = ((𝐶‘𝑖)‘𝑍))
171170adantl 481 . . . . . . . . . . . . 13 (((𝜑 ∧ 𝑖 ∈ ℕ) ∧ 𝑗 = 𝑖) → ((𝐶‘𝑗)‘𝑍) = ((𝐶‘𝑖)‘𝑍))
172 simpr 484 . . . . . . . . . . . . 13 ((𝜑 ∧ 𝑖 ∈ ℕ) → 𝑖 ∈ ℕ)
173 fvexd 6841 . . . . . . . . . . . . 13 ((𝜑 ∧ 𝑖 ∈ ℕ) → ((𝐶‘𝑖)‘𝑍) ∈ V)
174168, 171, 172, 173fvmptd 6941 . . . . . . . . . . . 12 ((𝜑 ∧ 𝑖 ∈ ℕ) → ((𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)‘𝑍))‘𝑖) = ((𝐶‘𝑖)‘𝑍))
175 eqidd 2730 . . . . . . . . . . . . 13 ((𝜑 ∧ 𝑖 ∈ ℕ) → (𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍)) = (𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍)))
176 fveq2 6826 . . . . . . . . . . . . . . 15 (𝑗 = 𝑖 → (𝐷‘𝑗) = (𝐷‘𝑖))
177176fveq1d 6828 . . . . . . . . . . . . . 14 (𝑗 = 𝑖 → ((𝐷‘𝑗)‘𝑍) = ((𝐷‘𝑖)‘𝑍))
178177adantl 481 . . . . . . . . . . . . 13 (((𝜑 ∧ 𝑖 ∈ ℕ) ∧ 𝑗 = 𝑖) → ((𝐷‘𝑗)‘𝑍) = ((𝐷‘𝑖)‘𝑍))
179 fvexd 6841 . . . . . . . . . . . . 13 ((𝜑 ∧ 𝑖 ∈ ℕ) → ((𝐷‘𝑖)‘𝑍) ∈ V)
180175, 178, 172, 179fvmptd 6941 . . . . . . . . . . . 12 ((𝜑 ∧ 𝑖 ∈ ℕ) → ((𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))‘𝑖) = ((𝐷‘𝑖)‘𝑍))
181174, 180oveq12d 7371 . . . . . . . . . . 11 ((𝜑 ∧ 𝑖 ∈ ℕ) → (((𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)‘𝑍))‘𝑖)[,)((𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))‘𝑖)) = (((𝐶‘𝑖)‘𝑍)[,)((𝐷‘𝑖)‘𝑍)))
182181iuneq2dv 4969 . . . . . . . . . 10 (𝜑 → ∪ 𝑖 ∈ ℕ (((𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)‘𝑍))‘𝑖)[,)((𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))‘𝑖)) = ∪ 𝑖 ∈ ℕ (((𝐶‘𝑖)‘𝑍)[,)((𝐷‘𝑖)‘𝑍)))
183170, 177oveq12d 7371 . . . . . . . . . . . . 13 (𝑗 = 𝑖 → (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)) = (((𝐶‘𝑖)‘𝑍)[,)((𝐷‘𝑖)‘𝑍)))
184183cbviunv 4992 . . . . . . . . . . . 12 ∪ 𝑗 ∈ ℕ (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)) = ∪ 𝑖 ∈ ℕ (((𝐶‘𝑖)‘𝑍)[,)((𝐷‘𝑖)‘𝑍))
185184eqcomi 2738 . . . . . . . . . . 11 ∪ 𝑖 ∈ ℕ (((𝐶‘𝑖)‘𝑍)[,)((𝐷‘𝑖)‘𝑍)) = ∪ 𝑗 ∈ ℕ (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))
186185a1i 11 . . . . . . . . . 10 (𝜑 → ∪ 𝑖 ∈ ℕ (((𝐶‘𝑖)‘𝑍)[,)((𝐷‘𝑖)‘𝑍)) = ∪ 𝑗 ∈ ℕ (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)))
187182, 186eqtr2d 2765 . . . . . . . . 9 (𝜑 → ∪ 𝑗 ∈ ℕ (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)) = ∪ 𝑖 ∈ ℕ (((𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)‘𝑍))‘𝑖)[,)((𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))‘𝑖)))
188167, 187sseqtrd 3974 . . . . . . . 8 (𝜑 → ((𝐴‘𝑍)[,)(𝐵‘𝑍)) ⊆ ∪ 𝑖 ∈ ℕ (((𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)‘𝑍))‘𝑖)[,)((𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))‘𝑖)))
189188ad2antrr 726 . . . . . . 7 (((𝜑 ∧ (𝐴‘𝑍) < (𝐵‘𝑍)) ∧ (Σ^‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))) ∈ ℝ) → ((𝐴‘𝑍)[,)(𝐵‘𝑍)) ⊆ ∪ 𝑖 ∈ ℕ (((𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)‘𝑍))‘𝑖)[,)((𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))‘𝑖)))
190 fvex 6839 . . . . . . . . . . . . . . 15 ((𝐶‘𝑖)‘𝑍) ∈ V
191170, 83, 190fvmpt 6934 . . . . . . . . . . . . . 14 (𝑖 ∈ ℕ → ((𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)‘𝑍))‘𝑖) = ((𝐶‘𝑖)‘𝑍))
192 fvex 6839 . . . . . . . . . . . . . . 15 ((𝐷‘𝑖)‘𝑍) ∈ V
193177, 86, 192fvmpt 6934 . . . . . . . . . . . . . 14 (𝑖 ∈ ℕ → ((𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))‘𝑖) = ((𝐷‘𝑖)‘𝑍))
194191, 193oveq12d 7371 . . . . . . . . . . . . 13 (𝑖 ∈ ℕ → (((𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)‘𝑍))‘𝑖)[,)((𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))‘𝑖)) = (((𝐶‘𝑖)‘𝑍)[,)((𝐷‘𝑖)‘𝑍)))
195194fveq2d 6830 . . . . . . . . . . . 12 (𝑖 ∈ ℕ → (vol‘(((𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)‘𝑍))‘𝑖)[,)((𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))‘𝑖))) = (vol‘(((𝐶‘𝑖)‘𝑍)[,)((𝐷‘𝑖)‘𝑍))))
196195mpteq2ia 5190 . . . . . . . . . . 11 (𝑖 ∈ ℕ ↦ (vol‘(((𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)‘𝑍))‘𝑖)[,)((𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))‘𝑖)))) = (𝑖 ∈ ℕ ↦ (vol‘(((𝐶‘𝑖)‘𝑍)[,)((𝐷‘𝑖)‘𝑍))))
197 eqcom 2736 . . . . . . . . . . . . . . . 16 (𝑗 = 𝑖 ↔ 𝑖 = 𝑗)
198197imbi1i 349 . . . . . . . . . . . . . . 15 ((𝑗 = 𝑖 → (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)) = (((𝐶‘𝑖)‘𝑍)[,)((𝐷‘𝑖)‘𝑍))) ↔ (𝑖 = 𝑗 → (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)) = (((𝐶‘𝑖)‘𝑍)[,)((𝐷‘𝑖)‘𝑍))))
199 eqcom 2736 . . . . . . . . . . . . . . . 16 ((((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)) = (((𝐶‘𝑖)‘𝑍)[,)((𝐷‘𝑖)‘𝑍)) ↔ (((𝐶‘𝑖)‘𝑍)[,)((𝐷‘𝑖)‘𝑍)) = (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)))
200199imbi2i 336 . . . . . . . . . . . . . . 15 ((𝑖 = 𝑗 → (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)) = (((𝐶‘𝑖)‘𝑍)[,)((𝐷‘𝑖)‘𝑍))) ↔ (𝑖 = 𝑗 → (((𝐶‘𝑖)‘𝑍)[,)((𝐷‘𝑖)‘𝑍)) = (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))
201198, 200bitri 275 . . . . . . . . . . . . . 14 ((𝑗 = 𝑖 → (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)) = (((𝐶‘𝑖)‘𝑍)[,)((𝐷‘𝑖)‘𝑍))) ↔ (𝑖 = 𝑗 → (((𝐶‘𝑖)‘𝑍)[,)((𝐷‘𝑖)‘𝑍)) = (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))
202183, 201mpbi 230 . . . . . . . . . . . . 13 (𝑖 = 𝑗 → (((𝐶‘𝑖)‘𝑍)[,)((𝐷‘𝑖)‘𝑍)) = (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)))
203202fveq2d 6830 . . . . . . . . . . . 12 (𝑖 = 𝑗 → (vol‘(((𝐶‘𝑖)‘𝑍)[,)((𝐷‘𝑖)‘𝑍))) = (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))
204203cbvmptv 5199 . . . . . . . . . . 11 (𝑖 ∈ ℕ ↦ (vol‘(((𝐶‘𝑖)‘𝑍)[,)((𝐷‘𝑖)‘𝑍)))) = (𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))
205196, 204eqtri 2752 . . . . . . . . . 10 (𝑖 ∈ ℕ ↦ (vol‘(((𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)‘𝑍))‘𝑖)[,)((𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))‘𝑖)))) = (𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))
206205fveq2i 6829 . . . . . . . . 9 (Σ^‘(𝑖 ∈ ℕ ↦ (vol‘(((𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)‘𝑍))‘𝑖)[,)((𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))‘𝑖))))) = (Σ^‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)))))
207206a1i 11 . . . . . . . 8 (((𝜑 ∧ (𝐴‘𝑍) < (𝐵‘𝑍)) ∧ (Σ^‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))) ∈ ℝ) → (Σ^‘(𝑖 ∈ ℕ ↦ (vol‘(((𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)‘𝑍))‘𝑖)[,)((𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))‘𝑖))))) = (Σ^‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))))
208 simpr 484 . . . . . . . 8 (((𝜑 ∧ (𝐴‘𝑍) < (𝐵‘𝑍)) ∧ (Σ^‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))) ∈ ℝ) → (Σ^‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))) ∈ ℝ)
209207, 208eqeltrd 2828 . . . . . . 7 (((𝜑 ∧ (𝐴‘𝑍) < (𝐵‘𝑍)) ∧ (Σ^‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))) ∈ ℝ) → (Σ^‘(𝑖 ∈ ℕ ↦ (vol‘(((𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)‘𝑍))‘𝑖)[,)((𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))‘𝑖))))) ∈ ℝ)
210 oveq1 7360 . . . . . . . . 9 (𝑤 = 𝑧 → (𝑤 − (𝐴‘𝑍)) = (𝑧 − (𝐴‘𝑍)))
211193breq1d 5105 . . . . . . . . . . . . . . . . 17 (𝑖 ∈ ℕ → (((𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))‘𝑖) ≤ 𝑧 ↔ ((𝐷‘𝑖)‘𝑍) ≤ 𝑧))
212211, 193ifbieq1d 4503 . . . . . . . . . . . . . . . 16 (𝑖 ∈ ℕ → if(((𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))‘𝑖) ≤ 𝑧, ((𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))‘𝑖), 𝑧) = if(((𝐷‘𝑖)‘𝑍) ≤ 𝑧, ((𝐷‘𝑖)‘𝑍), 𝑧))
213191, 212oveq12d 7371 . . . . . . . . . . . . . . 15 (𝑖 ∈ ℕ → (((𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)‘𝑍))‘𝑖)[,)if(((𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))‘𝑖) ≤ 𝑧, ((𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))‘𝑖), 𝑧)) = (((𝐶‘𝑖)‘𝑍)[,)if(((𝐷‘𝑖)‘𝑍) ≤ 𝑧, ((𝐷‘𝑖)‘𝑍), 𝑧)))
214213fveq2d 6830 . . . . . . . . . . . . . 14 (𝑖 ∈ ℕ → (vol‘(((𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)‘𝑍))‘𝑖)[,)if(((𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))‘𝑖) ≤ 𝑧, ((𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))‘𝑖), 𝑧))) = (vol‘(((𝐶‘𝑖)‘𝑍)[,)if(((𝐷‘𝑖)‘𝑍) ≤ 𝑧, ((𝐷‘𝑖)‘𝑍), 𝑧))))
215214mpteq2ia 5190 . . . . . . . . . . . . 13 (𝑖 ∈ ℕ ↦ (vol‘(((𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)‘𝑍))‘𝑖)[,)if(((𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))‘𝑖) ≤ 𝑧, ((𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))‘𝑖), 𝑧)))) = (𝑖 ∈ ℕ ↦ (vol‘(((𝐶‘𝑖)‘𝑍)[,)if(((𝐷‘𝑖)‘𝑍) ≤ 𝑧, ((𝐷‘𝑖)‘𝑍), 𝑧))))
216 fveq2 6826 . . . . . . . . . . . . . . . . 17 (𝑖 = ℎ → (𝐶‘𝑖) = (𝐶‘ℎ))
217216fveq1d 6828 . . . . . . . . . . . . . . . 16 (𝑖 = ℎ → ((𝐶‘𝑖)‘𝑍) = ((𝐶‘ℎ)‘𝑍))
218 fveq2 6826 . . . . . . . . . . . . . . . . . . 19 (𝑖 = ℎ → (𝐷‘𝑖) = (𝐷‘ℎ))
219218fveq1d 6828 . . . . . . . . . . . . . . . . . 18 (𝑖 = ℎ → ((𝐷‘𝑖)‘𝑍) = ((𝐷‘ℎ)‘𝑍))
220219breq1d 5105 . . . . . . . . . . . . . . . . 17 (𝑖 = ℎ → (((𝐷‘𝑖)‘𝑍) ≤ 𝑧 ↔ ((𝐷‘ℎ)‘𝑍) ≤ 𝑧))
221220, 219ifbieq1d 4503 . . . . . . . . . . . . . . . 16 (𝑖 = ℎ → if(((𝐷‘𝑖)‘𝑍) ≤ 𝑧, ((𝐷‘𝑖)‘𝑍), 𝑧) = if(((𝐷‘ℎ)‘𝑍) ≤ 𝑧, ((𝐷‘ℎ)‘𝑍), 𝑧))
222217, 221oveq12d 7371 . . . . . . . . . . . . . . 15 (𝑖 = ℎ → (((𝐶‘𝑖)‘𝑍)[,)if(((𝐷‘𝑖)‘𝑍) ≤ 𝑧, ((𝐷‘𝑖)‘𝑍), 𝑧)) = (((𝐶‘ℎ)‘𝑍)[,)if(((𝐷‘ℎ)‘𝑍) ≤ 𝑧, ((𝐷‘ℎ)‘𝑍), 𝑧)))
223222fveq2d 6830 . . . . . . . . . . . . . 14 (𝑖 = ℎ → (vol‘(((𝐶‘𝑖)‘𝑍)[,)if(((𝐷‘𝑖)‘𝑍) ≤ 𝑧, ((𝐷‘𝑖)‘𝑍), 𝑧))) = (vol‘(((𝐶‘ℎ)‘𝑍)[,)if(((𝐷‘ℎ)‘𝑍) ≤ 𝑧, ((𝐷‘ℎ)‘𝑍), 𝑧))))
224223cbvmptv 5199 . . . . . . . . . . . . 13 (𝑖 ∈ ℕ ↦ (vol‘(((𝐶‘𝑖)‘𝑍)[,)if(((𝐷‘𝑖)‘𝑍) ≤ 𝑧, ((𝐷‘𝑖)‘𝑍), 𝑧)))) = (ℎ ∈ ℕ ↦ (vol‘(((𝐶‘ℎ)‘𝑍)[,)if(((𝐷‘ℎ)‘𝑍) ≤ 𝑧, ((𝐷‘ℎ)‘𝑍), 𝑧))))
225215, 224eqtri 2752 . . . . . . . . . . . 12 (𝑖 ∈ ℕ ↦ (vol‘(((𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)‘𝑍))‘𝑖)[,)if(((𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))‘𝑖) ≤ 𝑧, ((𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))‘𝑖), 𝑧)))) = (ℎ ∈ ℕ ↦ (vol‘(((𝐶‘ℎ)‘𝑍)[,)if(((𝐷‘ℎ)‘𝑍) ≤ 𝑧, ((𝐷‘ℎ)‘𝑍), 𝑧))))
226225a1i 11 . . . . . . . . . . 11 (𝑤 = 𝑧 → (𝑖 ∈ ℕ ↦ (vol‘(((𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)‘𝑍))‘𝑖)[,)if(((𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))‘𝑖) ≤ 𝑧, ((𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))‘𝑖), 𝑧)))) = (ℎ ∈ ℕ ↦ (vol‘(((𝐶‘ℎ)‘𝑍)[,)if(((𝐷‘ℎ)‘𝑍) ≤ 𝑧, ((𝐷‘ℎ)‘𝑍), 𝑧)))))
227 breq2 5099 . . . . . . . . . . . . . . . 16 (𝑤 = 𝑧 → (((𝐷‘ℎ)‘𝑍) ≤ 𝑤 ↔ ((𝐷‘ℎ)‘𝑍) ≤ 𝑧))
228 id 22 . . . . . . . . . . . . . . . 16 (𝑤 = 𝑧 → 𝑤 = 𝑧)
229227, 228ifbieq2d 4505 . . . . . . . . . . . . . . 15 (𝑤 = 𝑧 → if(((𝐷‘ℎ)‘𝑍) ≤ 𝑤, ((𝐷‘ℎ)‘𝑍), 𝑤) = if(((𝐷‘ℎ)‘𝑍) ≤ 𝑧, ((𝐷‘ℎ)‘𝑍), 𝑧))
230229eqcomd 2735 . . . . . . . . . . . . . 14 (𝑤 = 𝑧 → if(((𝐷‘ℎ)‘𝑍) ≤ 𝑧, ((𝐷‘ℎ)‘𝑍), 𝑧) = if(((𝐷‘ℎ)‘𝑍) ≤ 𝑤, ((𝐷‘ℎ)‘𝑍), 𝑤))
231230oveq2d 7369 . . . . . . . . . . . . 13 (𝑤 = 𝑧 → (((𝐶‘ℎ)‘𝑍)[,)if(((𝐷‘ℎ)‘𝑍) ≤ 𝑧, ((𝐷‘ℎ)‘𝑍), 𝑧)) = (((𝐶‘ℎ)‘𝑍)[,)if(((𝐷‘ℎ)‘𝑍) ≤ 𝑤, ((𝐷‘ℎ)‘𝑍), 𝑤)))
232231fveq2d 6830 . . . . . . . . . . . 12 (𝑤 = 𝑧 → (vol‘(((𝐶‘ℎ)‘𝑍)[,)if(((𝐷‘ℎ)‘𝑍) ≤ 𝑧, ((𝐷‘ℎ)‘𝑍), 𝑧))) = (vol‘(((𝐶‘ℎ)‘𝑍)[,)if(((𝐷‘ℎ)‘𝑍) ≤ 𝑤, ((𝐷‘ℎ)‘𝑍), 𝑤))))
233232mpteq2dv 5189 . . . . . . . . . . 11 (𝑤 = 𝑧 → (ℎ ∈ ℕ ↦ (vol‘(((𝐶‘ℎ)‘𝑍)[,)if(((𝐷‘ℎ)‘𝑍) ≤ 𝑧, ((𝐷‘ℎ)‘𝑍), 𝑧)))) = (ℎ ∈ ℕ ↦ (vol‘(((𝐶‘ℎ)‘𝑍)[,)if(((𝐷‘ℎ)‘𝑍) ≤ 𝑤, ((𝐷‘ℎ)‘𝑍), 𝑤)))))
234226, 233eqtr2d 2765 . . . . . . . . . 10 (𝑤 = 𝑧 → (ℎ ∈ ℕ ↦ (vol‘(((𝐶‘ℎ)‘𝑍)[,)if(((𝐷‘ℎ)‘𝑍) ≤ 𝑤, ((𝐷‘ℎ)‘𝑍), 𝑤)))) = (𝑖 ∈ ℕ ↦ (vol‘(((𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)‘𝑍))‘𝑖)[,)if(((𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))‘𝑖) ≤ 𝑧, ((𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))‘𝑖), 𝑧)))))
235234fveq2d 6830 . . . . . . . . 9 (𝑤 = 𝑧 → (Σ^‘(ℎ ∈ ℕ ↦ (vol‘(((𝐶‘ℎ)‘𝑍)[,)if(((𝐷‘ℎ)‘𝑍) ≤ 𝑤, ((𝐷‘ℎ)‘𝑍), 𝑤))))) = (Σ^‘(𝑖 ∈ ℕ ↦ (vol‘(((𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)‘𝑍))‘𝑖)[,)if(((𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))‘𝑖) ≤ 𝑧, ((𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))‘𝑖), 𝑧))))))
236210, 235breq12d 5108 . . . . . . . 8 (𝑤 = 𝑧 → ((𝑤 − (𝐴‘𝑍)) ≤ (Σ^‘(ℎ ∈ ℕ ↦ (vol‘(((𝐶‘ℎ)‘𝑍)[,)if(((𝐷‘ℎ)‘𝑍) ≤ 𝑤, ((𝐷‘ℎ)‘𝑍), 𝑤))))) ↔ (𝑧 − (𝐴‘𝑍)) ≤ (Σ^‘(𝑖 ∈ ℕ ↦ (vol‘(((𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)‘𝑍))‘𝑖)[,)if(((𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))‘𝑖) ≤ 𝑧, ((𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))‘𝑖), 𝑧)))))))
237236cbvrabv 3407 . . . . . . 7 {𝑤 ∈ ((𝐴‘𝑍)[,](𝐵‘𝑍)) ∣ (𝑤 − (𝐴‘𝑍)) ≤ (Σ^‘(ℎ ∈ ℕ ↦ (vol‘(((𝐶‘ℎ)‘𝑍)[,)if(((𝐷‘ℎ)‘𝑍) ≤ 𝑤, ((𝐷‘ℎ)‘𝑍), 𝑤)))))} = {𝑧 ∈ ((𝐴‘𝑍)[,](𝐵‘𝑍)) ∣ (𝑧 − (𝐴‘𝑍)) ≤ (Σ^‘(𝑖 ∈ ℕ ↦ (vol‘(((𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)‘𝑍))‘𝑖)[,)if(((𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))‘𝑖) ≤ 𝑧, ((𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))‘𝑖), 𝑧)))))}
238 eqid 2729 . . . . . . 7 sup({𝑤 ∈ ((𝐴‘𝑍)[,](𝐵‘𝑍)) ∣ (𝑤 − (𝐴‘𝑍)) ≤ (Σ^‘(ℎ ∈ ℕ ↦ (vol‘(((𝐶‘ℎ)‘𝑍)[,)if(((𝐷‘ℎ)‘𝑍) ≤ 𝑤, ((𝐷‘ℎ)‘𝑍), 𝑤)))))}, ℝ, < ) = sup({𝑤 ∈ ((𝐴‘𝑍)[,](𝐵‘𝑍)) ∣ (𝑤 − (𝐴‘𝑍)) ≤ (Σ^‘(ℎ ∈ ℕ ↦ (vol‘(((𝐶‘ℎ)‘𝑍)[,)if(((𝐷‘ℎ)‘𝑍) ≤ 𝑤, ((𝐷‘ℎ)‘𝑍), 𝑤)))))}, ℝ, < )
23980, 81, 82, 85, 88, 189, 209, 237, 238hoidmv1lelem3 46578 . . . . . 6 (((𝜑 ∧ (𝐴‘𝑍) < (𝐵‘𝑍)) ∧ (Σ^‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))) ∈ ℝ) → ((𝐵‘𝑍) − (𝐴‘𝑍)) ≤ (Σ^‘(𝑖 ∈ ℕ ↦ (vol‘(((𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)‘𝑍))‘𝑖)[,)((𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))‘𝑖))))))
240239, 207breqtrd 5121 . . . . 5 (((𝜑 ∧ (𝐴‘𝑍) < (𝐵‘𝑍)) ∧ (Σ^‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))) ∈ ℝ) → ((𝐵‘𝑍) − (𝐴‘𝑍)) ≤ (Σ^‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))))
24121, 79, 240syl2anc 584 . . . 4 (((𝜑 ∧ (𝐴‘𝑍) < (𝐵‘𝑍)) ∧ ¬ (Σ^‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))) = +∞) → ((𝐵‘𝑍) − (𝐴‘𝑍)) ≤ (Σ^‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))))
24220, 241pm2.61dan 812 . . 3 ((𝜑 ∧ (𝐴‘𝑍) < (𝐵‘𝑍)) → ((𝐵‘𝑍) − (𝐴‘𝑍)) ≤ (Σ^‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))))
24325, 29, 31, 8, 1hoidmvn0val 46569 . . . . . . 7 (𝜑 → (𝐴(𝐿‘𝑋)𝐵) = ∏𝑘 ∈ 𝑋 (vol‘((𝐴‘𝑘)[,)(𝐵‘𝑘))))
24426prodeq1d 15845 . . . . . . 7 (𝜑 → ∏𝑘 ∈ 𝑋 (vol‘((𝐴‘𝑘)[,)(𝐵‘𝑘))) = ∏𝑘 ∈ {𝑍} (vol‘((𝐴‘𝑘)[,)(𝐵‘𝑘))))
245 volicore 46566 . . . . . . . . . 10 (((𝐴‘𝑍) ∈ ℝ ∧ (𝐵‘𝑍) ∈ ℝ) → (vol‘((𝐴‘𝑍)[,)(𝐵‘𝑍))) ∈ ℝ)
2469, 7, 245syl2anc 584 . . . . . . . . 9 (𝜑 → (vol‘((𝐴‘𝑍)[,)(𝐵‘𝑍))) ∈ ℝ)
247246recnd 11162 . . . . . . . 8 (𝜑 → (vol‘((𝐴‘𝑍)[,)(𝐵‘𝑍))) ∈ ℂ)
248117, 119oveq12d 7371 . . . . . . . . . 10 (𝑘 = 𝑍 → ((𝐴‘𝑘)[,)(𝐵‘𝑘)) = ((𝐴‘𝑍)[,)(𝐵‘𝑍)))
249248fveq2d 6830 . . . . . . . . 9 (𝑘 = 𝑍 → (vol‘((𝐴‘𝑘)[,)(𝐵‘𝑘))) = (vol‘((𝐴‘𝑍)[,)(𝐵‘𝑍))))
250249prodsn 15887 . . . . . . . 8 ((𝑍 ∈ 𝑉 ∧ (vol‘((𝐴‘𝑍)[,)(𝐵‘𝑍))) ∈ ℂ) → ∏𝑘 ∈ {𝑍} (vol‘((𝐴‘𝑘)[,)(𝐵‘𝑘))) = (vol‘((𝐴‘𝑍)[,)(𝐵‘𝑍))))
2512, 247, 250syl2anc 584 . . . . . . 7 (𝜑 → ∏𝑘 ∈ {𝑍} (vol‘((𝐴‘𝑘)[,)(𝐵‘𝑘))) = (vol‘((𝐴‘𝑍)[,)(𝐵‘𝑍))))
252243, 244, 2513eqtrd 2768 . . . . . 6 (𝜑 → (𝐴(𝐿‘𝑋)𝐵) = (vol‘((𝐴‘𝑍)[,)(𝐵‘𝑍))))
253252adantr 480 . . . . 5 ((𝜑 ∧ (𝐴‘𝑍) < (𝐵‘𝑍)) → (𝐴(𝐿‘𝑋)𝐵) = (vol‘((𝐴‘𝑍)[,)(𝐵‘𝑍))))
254 volico 45968 . . . . . . 7 (((𝐴‘𝑍) ∈ ℝ ∧ (𝐵‘𝑍) ∈ ℝ) → (vol‘((𝐴‘𝑍)[,)(𝐵‘𝑍))) = if((𝐴‘𝑍) < (𝐵‘𝑍), ((𝐵‘𝑍) − (𝐴‘𝑍)), 0))
2559, 7, 254syl2anc 584 . . . . . 6 (𝜑 → (vol‘((𝐴‘𝑍)[,)(𝐵‘𝑍))) = if((𝐴‘𝑍) < (𝐵‘𝑍), ((𝐵‘𝑍) − (𝐴‘𝑍)), 0))
256255adantr 480 . . . . 5 ((𝜑 ∧ (𝐴‘𝑍) < (𝐵‘𝑍)) → (vol‘((𝐴‘𝑍)[,)(𝐵‘𝑍))) = if((𝐴‘𝑍) < (𝐵‘𝑍), ((𝐵‘𝑍) − (𝐴‘𝑍)), 0))
257 iftrue 4484 . . . . . 6 ((𝐴‘𝑍) < (𝐵‘𝑍) → if((𝐴‘𝑍) < (𝐵‘𝑍), ((𝐵‘𝑍) − (𝐴‘𝑍)), 0) = ((𝐵‘𝑍) − (𝐴‘𝑍)))
258257adantl 481 . . . . 5 ((𝜑 ∧ (𝐴‘𝑍) < (𝐵‘𝑍)) → if((𝐴‘𝑍) < (𝐵‘𝑍), ((𝐵‘𝑍) − (𝐴‘𝑍)), 0) = ((𝐵‘𝑍) − (𝐴‘𝑍)))
259253, 256, 2583eqtrd 2768 . . . 4 ((𝜑 ∧ (𝐴‘𝑍) < (𝐵‘𝑍)) → (𝐴(𝐿‘𝑋)𝐵) = ((𝐵‘𝑍) − (𝐴‘𝑍)))
26058fveq2d 6830 . . . . 5 (𝜑 → (Σ^‘(𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)(𝐿‘𝑋)(𝐷‘𝑗)))) = (Σ^‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))))
261260adantr 480 . . . 4 ((𝜑 ∧ (𝐴‘𝑍) < (𝐵‘𝑍)) → (Σ^‘(𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)(𝐿‘𝑋)(𝐷‘𝑗)))) = (Σ^‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))))
262259, 261breq12d 5108 . . 3 ((𝜑 ∧ (𝐴‘𝑍) < (𝐵‘𝑍)) → ((𝐴(𝐿‘𝑋)𝐵) ≤ (Σ^‘(𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)(𝐿‘𝑋)(𝐷‘𝑗)))) ↔ ((𝐵‘𝑍) − (𝐴‘𝑍)) ≤ (Σ^‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)))))))
263242, 262mpbird 257 . 2 ((𝜑 ∧ (𝐴‘𝑍) < (𝐵‘𝑍)) → (𝐴(𝐿‘𝑋)𝐵) ≤ (Σ^‘(𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)(𝐿‘𝑋)(𝐷‘𝑗)))))
264243adantr 480 . . . 4 ((𝜑 ∧ ¬ (𝐴‘𝑍) < (𝐵‘𝑍)) → (𝐴(𝐿‘𝑋)𝐵) = ∏𝑘 ∈ 𝑋 (vol‘((𝐴‘𝑘)[,)(𝐵‘𝑘))))
265244adantr 480 . . . 4 ((𝜑 ∧ ¬ (𝐴‘𝑍) < (𝐵‘𝑍)) → ∏𝑘 ∈ 𝑋 (vol‘((𝐴‘𝑘)[,)(𝐵‘𝑘))) = ∏𝑘 ∈ {𝑍} (vol‘((𝐴‘𝑘)[,)(𝐵‘𝑘))))
266251adantr 480 . . . . 5 ((𝜑 ∧ ¬ (𝐴‘𝑍) < (𝐵‘𝑍)) → ∏𝑘 ∈ {𝑍} (vol‘((𝐴‘𝑘)[,)(𝐵‘𝑘))) = (vol‘((𝐴‘𝑍)[,)(𝐵‘𝑍))))
267255adantr 480 . . . . 5 ((𝜑 ∧ ¬ (𝐴‘𝑍) < (𝐵‘𝑍)) → (vol‘((𝐴‘𝑍)[,)(𝐵‘𝑍))) = if((𝐴‘𝑍) < (𝐵‘𝑍), ((𝐵‘𝑍) − (𝐴‘𝑍)), 0))
268 iffalse 4487 . . . . . 6 (¬ (𝐴‘𝑍) < (𝐵‘𝑍) → if((𝐴‘𝑍) < (𝐵‘𝑍), ((𝐵‘𝑍) − (𝐴‘𝑍)), 0) = 0)
269268adantl 481 . . . . 5 ((𝜑 ∧ ¬ (𝐴‘𝑍) < (𝐵‘𝑍)) → if((𝐴‘𝑍) < (𝐵‘𝑍), ((𝐵‘𝑍) − (𝐴‘𝑍)), 0) = 0)
270266, 267, 2693eqtrd 2768 . . . 4 ((𝜑 ∧ ¬ (𝐴‘𝑍) < (𝐵‘𝑍)) → ∏𝑘 ∈ {𝑍} (vol‘((𝐴‘𝑘)[,)(𝐵‘𝑘))) = 0)
271264, 265, 2703eqtrd 2768 . . 3 ((𝜑 ∧ ¬ (𝐴‘𝑍) < (𝐵‘𝑍)) → (𝐴(𝐿‘𝑋)𝐵) = 0)
27223a1i 11 . . . . 5 (𝜑 → ℕ ∈ V)
273272, 75sge0ge0 46369 . . . 4 (𝜑 → 0 ≤ (Σ^‘(𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)(𝐿‘𝑋)(𝐷‘𝑗)))))
274273adantr 480 . . 3 ((𝜑 ∧ ¬ (𝐴‘𝑍) < (𝐵‘𝑍)) → 0 ≤ (Σ^‘(𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)(𝐿‘𝑋)(𝐷‘𝑗)))))
275271, 274eqbrtrd 5117 . 2 ((𝜑 ∧ ¬ (𝐴‘𝑍) < (𝐵‘𝑍)) → (𝐴(𝐿‘𝑋)𝐵) ≤ (Σ^‘(𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)(𝐿‘𝑋)(𝐷‘𝑗)))))
276263, 275pm2.61dan 812 1 (𝜑 → (𝐴(𝐿‘𝑋)𝐵) ≤ (Σ^‘(𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)(𝐿‘𝑋)(𝐷‘𝑗)))))
Colors of variables: wff setvar class
Syntax hints:  ¬ wn 3   → wi 4   ↔ wb 206   ∧ wa 395   ∧ w3a 1086   = wceq 1540   ∈ wcel 2109   ≠ wne 2925  ∀wral 3044  ∃wrex 3053  {crab 3396  Vcvv 3438   ⊆ wss 3905  ∅c0 4286  ifcif 4478  {csn 4579  ⟨cop 4585  ∪ ciun 4944   class class class wbr 5095   ↦ cmpt 5176  ⟶wf 6482  ‘cfv 6486  (class class class)co 7353   ∈ cmpo 7355   ↑m cmap 8760  Xcixp 8831  Fincfn 8879  supcsup 9349  ℂcc 11026  ℝcr 11027  0cc0 11028  +∞cpnf 11165  ℝ*cxr 11167   < clt 11168   ≤ cle 11169   − cmin 11365  ℕcn 12146  [,)cico 13268  [,]cicc 13269  ∏cprod 15828  volcvol 25380  Σ^csumge0 46347
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 1910  ax-6 1967  ax-7 2008  ax-8 2111  ax-9 2119  ax-10 2142  ax-11 2158  ax-12 2178  ax-ext 2701  ax-rep 5221  ax-sep 5238  ax-nul 5248  ax-pow 5307  ax-pr 5374  ax-un 7675  ax-inf2 9556  ax-cnex 11084  ax-resscn 11085  ax-1cn 11086  ax-icn 11087  ax-addcl 11088  ax-addrcl 11089  ax-mulcl 11090  ax-mulrcl 11091  ax-mulcom 11092  ax-addass 11093  ax-mulass 11094  ax-distr 11095  ax-i2m1 11096  ax-1ne0 11097  ax-1rid 11098  ax-rnegex 11099  ax-rrecex 11100  ax-cnre 11101  ax-pre-lttri 11102  ax-pre-lttrn 11103  ax-pre-ltadd 11104  ax-pre-mulgt0 11105  ax-pre-sup 11106
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3or 1087  df-3an 1088  df-tru 1543  df-fal 1553  df-ex 1780  df-nf 1784  df-sb 2066  df-mo 2533  df-eu 2562  df-clab 2708  df-cleq 2721  df-clel 2803  df-nfc 2878  df-ne 2926  df-nel 3030  df-ral 3045  df-rex 3054  df-rmo 3345  df-reu 3346  df-rab 3397  df-v 3440  df-sbc 3745  df-csb 3854  df-dif 3908  df-un 3910  df-in 3912  df-ss 3922  df-pss 3925  df-nul 4287  df-if 4479  df-pw 4555  df-sn 4580  df-pr 4582  df-op 4586  df-uni 4862  df-int 4900  df-iun 4946  df-br 5096  df-opab 5158  df-mpt 5177  df-tr 5203  df-id 5518  df-eprel 5523  df-po 5531  df-so 5532  df-fr 5576  df-se 5577  df-we 5578  df-xp 5629  df-rel 5630  df-cnv 5631  df-co 5632  df-dm 5633  df-rn 5634  df-res 5635  df-ima 5636  df-pred 6253  df-ord 6314  df-on 6315  df-lim 6316  df-suc 6317  df-iota 6442  df-fun 6488  df-fn 6489  df-f 6490  df-f1 6491  df-fo 6492  df-f1o 6493  df-fv 6494  df-isom 6495  df-riota 7310  df-ov 7356  df-oprab 7357  df-mpo 7358  df-of 7617  df-om 7807  df-1st 7931  df-2nd 7932  df-frecs 8221  df-wrecs 8252  df-recs 8301  df-rdg 8339  df-1o 8395  df-2o 8396  df-er 8632  df-map 8762  df-pm 8763  df-ixp 8832  df-en 8880  df-dom 8881  df-sdom 8882  df-fin 8883  df-fi 9320  df-sup 9351  df-inf 9352  df-oi 9421  df-dju 9816  df-card 9854  df-pnf 11170  df-mnf 11171  df-xr 11172  df-ltxr 11173  df-le 11174  df-sub 11367  df-neg 11368  df-div 11796  df-nn 12147  df-2 12209  df-3 12210  df-n0 12403  df-z 12490  df-uz 12754  df-q 12868  df-rp 12912  df-xneg 13032  df-xadd 13033  df-xmul 13034  df-ioo 13270  df-ico 13272  df-icc 13273  df-fz 13429  df-fzo 13576  df-fl 13714  df-seq 13927  df-exp 13987  df-hash 14256  df-cj 15024  df-re 15025  df-im 15026  df-sqrt 15160  df-abs 15161  df-clim 15413  df-rlim 15414  df-sum 15612  df-prod 15829  df-rest 17344  df-topgen 17365  df-psmet 21271  df-xmet 21272  df-met 21273  df-bl 21274  df-mopn 21275  df-top 22797  df-topon 22814  df-bases 22849  df-cmp 23290  df-ovol 25381  df-vol 25382  df-sumge0 46348
This theorem is referenced by:  hoidmvle  46585
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