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Theorem i1fmul 23754
Description: The pointwise product of two simple functions is a simple function. (Contributed by Mario Carneiro, 5-Sep-2014.)
Hypotheses
Ref Expression
i1fadd.1 (𝜑𝐹 ∈ dom ∫1)
i1fadd.2 (𝜑𝐺 ∈ dom ∫1)
Assertion
Ref Expression
i1fmul (𝜑 → (𝐹𝑓 · 𝐺) ∈ dom ∫1)

Proof of Theorem i1fmul
Dummy variables 𝑦 𝑧 𝑤 𝑣 𝑥 𝑢 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 remulcl 10274 . . . 4 ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) → (𝑥 · 𝑦) ∈ ℝ)
21adantl 473 . . 3 ((𝜑 ∧ (𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ)) → (𝑥 · 𝑦) ∈ ℝ)
3 i1fadd.1 . . . 4 (𝜑𝐹 ∈ dom ∫1)
4 i1ff 23734 . . . 4 (𝐹 ∈ dom ∫1𝐹:ℝ⟶ℝ)
53, 4syl 17 . . 3 (𝜑𝐹:ℝ⟶ℝ)
6 i1fadd.2 . . . 4 (𝜑𝐺 ∈ dom ∫1)
7 i1ff 23734 . . . 4 (𝐺 ∈ dom ∫1𝐺:ℝ⟶ℝ)
86, 7syl 17 . . 3 (𝜑𝐺:ℝ⟶ℝ)
9 reex 10280 . . . 4 ℝ ∈ V
109a1i 11 . . 3 (𝜑 → ℝ ∈ V)
11 inidm 3982 . . 3 (ℝ ∩ ℝ) = ℝ
122, 5, 8, 10, 10, 11off 7110 . 2 (𝜑 → (𝐹𝑓 · 𝐺):ℝ⟶ℝ)
13 i1frn 23735 . . . . . 6 (𝐹 ∈ dom ∫1 → ran 𝐹 ∈ Fin)
143, 13syl 17 . . . . 5 (𝜑 → ran 𝐹 ∈ Fin)
15 i1frn 23735 . . . . . 6 (𝐺 ∈ dom ∫1 → ran 𝐺 ∈ Fin)
166, 15syl 17 . . . . 5 (𝜑 → ran 𝐺 ∈ Fin)
17 xpfi 8438 . . . . 5 ((ran 𝐹 ∈ Fin ∧ ran 𝐺 ∈ Fin) → (ran 𝐹 × ran 𝐺) ∈ Fin)
1814, 16, 17syl2anc 579 . . . 4 (𝜑 → (ran 𝐹 × ran 𝐺) ∈ Fin)
19 eqid 2765 . . . . . 6 (𝑢 ∈ ran 𝐹, 𝑣 ∈ ran 𝐺 ↦ (𝑢 · 𝑣)) = (𝑢 ∈ ran 𝐹, 𝑣 ∈ ran 𝐺 ↦ (𝑢 · 𝑣))
20 ovex 6874 . . . . . 6 (𝑢 · 𝑣) ∈ V
2119, 20fnmpt2i 7440 . . . . 5 (𝑢 ∈ ran 𝐹, 𝑣 ∈ ran 𝐺 ↦ (𝑢 · 𝑣)) Fn (ran 𝐹 × ran 𝐺)
22 dffn4 6304 . . . . 5 ((𝑢 ∈ ran 𝐹, 𝑣 ∈ ran 𝐺 ↦ (𝑢 · 𝑣)) Fn (ran 𝐹 × ran 𝐺) ↔ (𝑢 ∈ ran 𝐹, 𝑣 ∈ ran 𝐺 ↦ (𝑢 · 𝑣)):(ran 𝐹 × ran 𝐺)–onto→ran (𝑢 ∈ ran 𝐹, 𝑣 ∈ ran 𝐺 ↦ (𝑢 · 𝑣)))
2321, 22mpbi 221 . . . 4 (𝑢 ∈ ran 𝐹, 𝑣 ∈ ran 𝐺 ↦ (𝑢 · 𝑣)):(ran 𝐹 × ran 𝐺)–onto→ran (𝑢 ∈ ran 𝐹, 𝑣 ∈ ran 𝐺 ↦ (𝑢 · 𝑣))
24 fofi 8459 . . . 4 (((ran 𝐹 × ran 𝐺) ∈ Fin ∧ (𝑢 ∈ ran 𝐹, 𝑣 ∈ ran 𝐺 ↦ (𝑢 · 𝑣)):(ran 𝐹 × ran 𝐺)–onto→ran (𝑢 ∈ ran 𝐹, 𝑣 ∈ ran 𝐺 ↦ (𝑢 · 𝑣))) → ran (𝑢 ∈ ran 𝐹, 𝑣 ∈ ran 𝐺 ↦ (𝑢 · 𝑣)) ∈ Fin)
2518, 23, 24sylancl 580 . . 3 (𝜑 → ran (𝑢 ∈ ran 𝐹, 𝑣 ∈ ran 𝐺 ↦ (𝑢 · 𝑣)) ∈ Fin)
26 eqid 2765 . . . . . . . . 9 (𝑥 · 𝑦) = (𝑥 · 𝑦)
27 rspceov 6888 . . . . . . . . 9 ((𝑥 ∈ ran 𝐹𝑦 ∈ ran 𝐺 ∧ (𝑥 · 𝑦) = (𝑥 · 𝑦)) → ∃𝑢 ∈ ran 𝐹𝑣 ∈ ran 𝐺(𝑥 · 𝑦) = (𝑢 · 𝑣))
2826, 27mp3an3 1574 . . . . . . . 8 ((𝑥 ∈ ran 𝐹𝑦 ∈ ran 𝐺) → ∃𝑢 ∈ ran 𝐹𝑣 ∈ ran 𝐺(𝑥 · 𝑦) = (𝑢 · 𝑣))
29 ovex 6874 . . . . . . . . 9 (𝑥 · 𝑦) ∈ V
30 eqeq1 2769 . . . . . . . . . 10 (𝑤 = (𝑥 · 𝑦) → (𝑤 = (𝑢 · 𝑣) ↔ (𝑥 · 𝑦) = (𝑢 · 𝑣)))
31302rexbidv 3204 . . . . . . . . 9 (𝑤 = (𝑥 · 𝑦) → (∃𝑢 ∈ ran 𝐹𝑣 ∈ ran 𝐺 𝑤 = (𝑢 · 𝑣) ↔ ∃𝑢 ∈ ran 𝐹𝑣 ∈ ran 𝐺(𝑥 · 𝑦) = (𝑢 · 𝑣)))
3229, 31elab 3504 . . . . . . . 8 ((𝑥 · 𝑦) ∈ {𝑤 ∣ ∃𝑢 ∈ ran 𝐹𝑣 ∈ ran 𝐺 𝑤 = (𝑢 · 𝑣)} ↔ ∃𝑢 ∈ ran 𝐹𝑣 ∈ ran 𝐺(𝑥 · 𝑦) = (𝑢 · 𝑣))
3328, 32sylibr 225 . . . . . . 7 ((𝑥 ∈ ran 𝐹𝑦 ∈ ran 𝐺) → (𝑥 · 𝑦) ∈ {𝑤 ∣ ∃𝑢 ∈ ran 𝐹𝑣 ∈ ran 𝐺 𝑤 = (𝑢 · 𝑣)})
3433adantl 473 . . . . . 6 ((𝜑 ∧ (𝑥 ∈ ran 𝐹𝑦 ∈ ran 𝐺)) → (𝑥 · 𝑦) ∈ {𝑤 ∣ ∃𝑢 ∈ ran 𝐹𝑣 ∈ ran 𝐺 𝑤 = (𝑢 · 𝑣)})
355ffnd 6224 . . . . . . 7 (𝜑𝐹 Fn ℝ)
36 dffn3 6234 . . . . . . 7 (𝐹 Fn ℝ ↔ 𝐹:ℝ⟶ran 𝐹)
3735, 36sylib 209 . . . . . 6 (𝜑𝐹:ℝ⟶ran 𝐹)
388ffnd 6224 . . . . . . 7 (𝜑𝐺 Fn ℝ)
39 dffn3 6234 . . . . . . 7 (𝐺 Fn ℝ ↔ 𝐺:ℝ⟶ran 𝐺)
4038, 39sylib 209 . . . . . 6 (𝜑𝐺:ℝ⟶ran 𝐺)
4134, 37, 40, 10, 10, 11off 7110 . . . . 5 (𝜑 → (𝐹𝑓 · 𝐺):ℝ⟶{𝑤 ∣ ∃𝑢 ∈ ran 𝐹𝑣 ∈ ran 𝐺 𝑤 = (𝑢 · 𝑣)})
4241frnd 6230 . . . 4 (𝜑 → ran (𝐹𝑓 · 𝐺) ⊆ {𝑤 ∣ ∃𝑢 ∈ ran 𝐹𝑣 ∈ ran 𝐺 𝑤 = (𝑢 · 𝑣)})
4319rnmpt2 6968 . . . 4 ran (𝑢 ∈ ran 𝐹, 𝑣 ∈ ran 𝐺 ↦ (𝑢 · 𝑣)) = {𝑤 ∣ ∃𝑢 ∈ ran 𝐹𝑣 ∈ ran 𝐺 𝑤 = (𝑢 · 𝑣)}
4442, 43syl6sseqr 3812 . . 3 (𝜑 → ran (𝐹𝑓 · 𝐺) ⊆ ran (𝑢 ∈ ran 𝐹, 𝑣 ∈ ran 𝐺 ↦ (𝑢 · 𝑣)))
45 ssfi 8387 . . 3 ((ran (𝑢 ∈ ran 𝐹, 𝑣 ∈ ran 𝐺 ↦ (𝑢 · 𝑣)) ∈ Fin ∧ ran (𝐹𝑓 · 𝐺) ⊆ ran (𝑢 ∈ ran 𝐹, 𝑣 ∈ ran 𝐺 ↦ (𝑢 · 𝑣))) → ran (𝐹𝑓 · 𝐺) ∈ Fin)
4625, 44, 45syl2anc 579 . 2 (𝜑 → ran (𝐹𝑓 · 𝐺) ∈ Fin)
4712frnd 6230 . . . . . . 7 (𝜑 → ran (𝐹𝑓 · 𝐺) ⊆ ℝ)
48 ax-resscn 10246 . . . . . . 7 ℝ ⊆ ℂ
4947, 48syl6ss 3773 . . . . . 6 (𝜑 → ran (𝐹𝑓 · 𝐺) ⊆ ℂ)
5049ssdifd 3908 . . . . 5 (𝜑 → (ran (𝐹𝑓 · 𝐺) ∖ {0}) ⊆ (ℂ ∖ {0}))
5150sselda 3761 . . . 4 ((𝜑𝑦 ∈ (ran (𝐹𝑓 · 𝐺) ∖ {0})) → 𝑦 ∈ (ℂ ∖ {0}))
523, 6i1fmullem 23752 . . . 4 ((𝜑𝑦 ∈ (ℂ ∖ {0})) → ((𝐹𝑓 · 𝐺) “ {𝑦}) = 𝑧 ∈ (ran 𝐺 ∖ {0})((𝐹 “ {(𝑦 / 𝑧)}) ∩ (𝐺 “ {𝑧})))
5351, 52syldan 585 . . 3 ((𝜑𝑦 ∈ (ran (𝐹𝑓 · 𝐺) ∖ {0})) → ((𝐹𝑓 · 𝐺) “ {𝑦}) = 𝑧 ∈ (ran 𝐺 ∖ {0})((𝐹 “ {(𝑦 / 𝑧)}) ∩ (𝐺 “ {𝑧})))
54 difss 3899 . . . . . 6 (ran 𝐺 ∖ {0}) ⊆ ran 𝐺
55 ssfi 8387 . . . . . 6 ((ran 𝐺 ∈ Fin ∧ (ran 𝐺 ∖ {0}) ⊆ ran 𝐺) → (ran 𝐺 ∖ {0}) ∈ Fin)
5616, 54, 55sylancl 580 . . . . 5 (𝜑 → (ran 𝐺 ∖ {0}) ∈ Fin)
57 i1fima 23736 . . . . . . . 8 (𝐹 ∈ dom ∫1 → (𝐹 “ {(𝑦 / 𝑧)}) ∈ dom vol)
583, 57syl 17 . . . . . . 7 (𝜑 → (𝐹 “ {(𝑦 / 𝑧)}) ∈ dom vol)
59 i1fima 23736 . . . . . . . 8 (𝐺 ∈ dom ∫1 → (𝐺 “ {𝑧}) ∈ dom vol)
606, 59syl 17 . . . . . . 7 (𝜑 → (𝐺 “ {𝑧}) ∈ dom vol)
61 inmbl 23600 . . . . . . 7 (((𝐹 “ {(𝑦 / 𝑧)}) ∈ dom vol ∧ (𝐺 “ {𝑧}) ∈ dom vol) → ((𝐹 “ {(𝑦 / 𝑧)}) ∩ (𝐺 “ {𝑧})) ∈ dom vol)
6258, 60, 61syl2anc 579 . . . . . 6 (𝜑 → ((𝐹 “ {(𝑦 / 𝑧)}) ∩ (𝐺 “ {𝑧})) ∈ dom vol)
6362ralrimivw 3114 . . . . 5 (𝜑 → ∀𝑧 ∈ (ran 𝐺 ∖ {0})((𝐹 “ {(𝑦 / 𝑧)}) ∩ (𝐺 “ {𝑧})) ∈ dom vol)
64 finiunmbl 23602 . . . . 5 (((ran 𝐺 ∖ {0}) ∈ Fin ∧ ∀𝑧 ∈ (ran 𝐺 ∖ {0})((𝐹 “ {(𝑦 / 𝑧)}) ∩ (𝐺 “ {𝑧})) ∈ dom vol) → 𝑧 ∈ (ran 𝐺 ∖ {0})((𝐹 “ {(𝑦 / 𝑧)}) ∩ (𝐺 “ {𝑧})) ∈ dom vol)
6556, 63, 64syl2anc 579 . . . 4 (𝜑 𝑧 ∈ (ran 𝐺 ∖ {0})((𝐹 “ {(𝑦 / 𝑧)}) ∩ (𝐺 “ {𝑧})) ∈ dom vol)
6665adantr 472 . . 3 ((𝜑𝑦 ∈ (ran (𝐹𝑓 · 𝐺) ∖ {0})) → 𝑧 ∈ (ran 𝐺 ∖ {0})((𝐹 “ {(𝑦 / 𝑧)}) ∩ (𝐺 “ {𝑧})) ∈ dom vol)
6753, 66eqeltrd 2844 . 2 ((𝜑𝑦 ∈ (ran (𝐹𝑓 · 𝐺) ∖ {0})) → ((𝐹𝑓 · 𝐺) “ {𝑦}) ∈ dom vol)
68 mblvol 23588 . . . 4 (((𝐹𝑓 · 𝐺) “ {𝑦}) ∈ dom vol → (vol‘((𝐹𝑓 · 𝐺) “ {𝑦})) = (vol*‘((𝐹𝑓 · 𝐺) “ {𝑦})))
6967, 68syl 17 . . 3 ((𝜑𝑦 ∈ (ran (𝐹𝑓 · 𝐺) ∖ {0})) → (vol‘((𝐹𝑓 · 𝐺) “ {𝑦})) = (vol*‘((𝐹𝑓 · 𝐺) “ {𝑦})))
70 mblss 23589 . . . . 5 (((𝐹𝑓 · 𝐺) “ {𝑦}) ∈ dom vol → ((𝐹𝑓 · 𝐺) “ {𝑦}) ⊆ ℝ)
7167, 70syl 17 . . . 4 ((𝜑𝑦 ∈ (ran (𝐹𝑓 · 𝐺) ∖ {0})) → ((𝐹𝑓 · 𝐺) “ {𝑦}) ⊆ ℝ)
7256adantr 472 . . . . 5 ((𝜑𝑦 ∈ (ran (𝐹𝑓 · 𝐺) ∖ {0})) → (ran 𝐺 ∖ {0}) ∈ Fin)
73 inss2 3993 . . . . . . 7 ((𝐹 “ {(𝑦 / 𝑧)}) ∩ (𝐺 “ {𝑧})) ⊆ (𝐺 “ {𝑧})
7473a1i 11 . . . . . 6 (((𝜑𝑦 ∈ (ran (𝐹𝑓 · 𝐺) ∖ {0})) ∧ 𝑧 ∈ (ran 𝐺 ∖ {0})) → ((𝐹 “ {(𝑦 / 𝑧)}) ∩ (𝐺 “ {𝑧})) ⊆ (𝐺 “ {𝑧}))
7560ad2antrr 717 . . . . . . 7 (((𝜑𝑦 ∈ (ran (𝐹𝑓 · 𝐺) ∖ {0})) ∧ 𝑧 ∈ (ran 𝐺 ∖ {0})) → (𝐺 “ {𝑧}) ∈ dom vol)
76 mblss 23589 . . . . . . 7 ((𝐺 “ {𝑧}) ∈ dom vol → (𝐺 “ {𝑧}) ⊆ ℝ)
7775, 76syl 17 . . . . . 6 (((𝜑𝑦 ∈ (ran (𝐹𝑓 · 𝐺) ∖ {0})) ∧ 𝑧 ∈ (ran 𝐺 ∖ {0})) → (𝐺 “ {𝑧}) ⊆ ℝ)
78 mblvol 23588 . . . . . . . 8 ((𝐺 “ {𝑧}) ∈ dom vol → (vol‘(𝐺 “ {𝑧})) = (vol*‘(𝐺 “ {𝑧})))
7975, 78syl 17 . . . . . . 7 (((𝜑𝑦 ∈ (ran (𝐹𝑓 · 𝐺) ∖ {0})) ∧ 𝑧 ∈ (ran 𝐺 ∖ {0})) → (vol‘(𝐺 “ {𝑧})) = (vol*‘(𝐺 “ {𝑧})))
806adantr 472 . . . . . . . 8 ((𝜑𝑦 ∈ (ran (𝐹𝑓 · 𝐺) ∖ {0})) → 𝐺 ∈ dom ∫1)
81 i1fima2sn 23738 . . . . . . . 8 ((𝐺 ∈ dom ∫1𝑧 ∈ (ran 𝐺 ∖ {0})) → (vol‘(𝐺 “ {𝑧})) ∈ ℝ)
8280, 81sylan 575 . . . . . . 7 (((𝜑𝑦 ∈ (ran (𝐹𝑓 · 𝐺) ∖ {0})) ∧ 𝑧 ∈ (ran 𝐺 ∖ {0})) → (vol‘(𝐺 “ {𝑧})) ∈ ℝ)
8379, 82eqeltrrd 2845 . . . . . 6 (((𝜑𝑦 ∈ (ran (𝐹𝑓 · 𝐺) ∖ {0})) ∧ 𝑧 ∈ (ran 𝐺 ∖ {0})) → (vol*‘(𝐺 “ {𝑧})) ∈ ℝ)
84 ovolsscl 23544 . . . . . 6 ((((𝐹 “ {(𝑦 / 𝑧)}) ∩ (𝐺 “ {𝑧})) ⊆ (𝐺 “ {𝑧}) ∧ (𝐺 “ {𝑧}) ⊆ ℝ ∧ (vol*‘(𝐺 “ {𝑧})) ∈ ℝ) → (vol*‘((𝐹 “ {(𝑦 / 𝑧)}) ∩ (𝐺 “ {𝑧}))) ∈ ℝ)
8574, 77, 83, 84syl3anc 1490 . . . . 5 (((𝜑𝑦 ∈ (ran (𝐹𝑓 · 𝐺) ∖ {0})) ∧ 𝑧 ∈ (ran 𝐺 ∖ {0})) → (vol*‘((𝐹 “ {(𝑦 / 𝑧)}) ∩ (𝐺 “ {𝑧}))) ∈ ℝ)
8672, 85fsumrecl 14752 . . . 4 ((𝜑𝑦 ∈ (ran (𝐹𝑓 · 𝐺) ∖ {0})) → Σ𝑧 ∈ (ran 𝐺 ∖ {0})(vol*‘((𝐹 “ {(𝑦 / 𝑧)}) ∩ (𝐺 “ {𝑧}))) ∈ ℝ)
8753fveq2d 6379 . . . . 5 ((𝜑𝑦 ∈ (ran (𝐹𝑓 · 𝐺) ∖ {0})) → (vol*‘((𝐹𝑓 · 𝐺) “ {𝑦})) = (vol*‘ 𝑧 ∈ (ran 𝐺 ∖ {0})((𝐹 “ {(𝑦 / 𝑧)}) ∩ (𝐺 “ {𝑧}))))
88 mblss 23589 . . . . . . . . . 10 (((𝐹 “ {(𝑦 / 𝑧)}) ∩ (𝐺 “ {𝑧})) ∈ dom vol → ((𝐹 “ {(𝑦 / 𝑧)}) ∩ (𝐺 “ {𝑧})) ⊆ ℝ)
8962, 88syl 17 . . . . . . . . 9 (𝜑 → ((𝐹 “ {(𝑦 / 𝑧)}) ∩ (𝐺 “ {𝑧})) ⊆ ℝ)
9089ad2antrr 717 . . . . . . . 8 (((𝜑𝑦 ∈ (ran (𝐹𝑓 · 𝐺) ∖ {0})) ∧ 𝑧 ∈ (ran 𝐺 ∖ {0})) → ((𝐹 “ {(𝑦 / 𝑧)}) ∩ (𝐺 “ {𝑧})) ⊆ ℝ)
9190, 85jca 507 . . . . . . 7 (((𝜑𝑦 ∈ (ran (𝐹𝑓 · 𝐺) ∖ {0})) ∧ 𝑧 ∈ (ran 𝐺 ∖ {0})) → (((𝐹 “ {(𝑦 / 𝑧)}) ∩ (𝐺 “ {𝑧})) ⊆ ℝ ∧ (vol*‘((𝐹 “ {(𝑦 / 𝑧)}) ∩ (𝐺 “ {𝑧}))) ∈ ℝ))
9291ralrimiva 3113 . . . . . 6 ((𝜑𝑦 ∈ (ran (𝐹𝑓 · 𝐺) ∖ {0})) → ∀𝑧 ∈ (ran 𝐺 ∖ {0})(((𝐹 “ {(𝑦 / 𝑧)}) ∩ (𝐺 “ {𝑧})) ⊆ ℝ ∧ (vol*‘((𝐹 “ {(𝑦 / 𝑧)}) ∩ (𝐺 “ {𝑧}))) ∈ ℝ))
93 ovolfiniun 23559 . . . . . 6 (((ran 𝐺 ∖ {0}) ∈ Fin ∧ ∀𝑧 ∈ (ran 𝐺 ∖ {0})(((𝐹 “ {(𝑦 / 𝑧)}) ∩ (𝐺 “ {𝑧})) ⊆ ℝ ∧ (vol*‘((𝐹 “ {(𝑦 / 𝑧)}) ∩ (𝐺 “ {𝑧}))) ∈ ℝ)) → (vol*‘ 𝑧 ∈ (ran 𝐺 ∖ {0})((𝐹 “ {(𝑦 / 𝑧)}) ∩ (𝐺 “ {𝑧}))) ≤ Σ𝑧 ∈ (ran 𝐺 ∖ {0})(vol*‘((𝐹 “ {(𝑦 / 𝑧)}) ∩ (𝐺 “ {𝑧}))))
9472, 92, 93syl2anc 579 . . . . 5 ((𝜑𝑦 ∈ (ran (𝐹𝑓 · 𝐺) ∖ {0})) → (vol*‘ 𝑧 ∈ (ran 𝐺 ∖ {0})((𝐹 “ {(𝑦 / 𝑧)}) ∩ (𝐺 “ {𝑧}))) ≤ Σ𝑧 ∈ (ran 𝐺 ∖ {0})(vol*‘((𝐹 “ {(𝑦 / 𝑧)}) ∩ (𝐺 “ {𝑧}))))
9587, 94eqbrtrd 4831 . . . 4 ((𝜑𝑦 ∈ (ran (𝐹𝑓 · 𝐺) ∖ {0})) → (vol*‘((𝐹𝑓 · 𝐺) “ {𝑦})) ≤ Σ𝑧 ∈ (ran 𝐺 ∖ {0})(vol*‘((𝐹 “ {(𝑦 / 𝑧)}) ∩ (𝐺 “ {𝑧}))))
96 ovollecl 23541 . . . 4 ((((𝐹𝑓 · 𝐺) “ {𝑦}) ⊆ ℝ ∧ Σ𝑧 ∈ (ran 𝐺 ∖ {0})(vol*‘((𝐹 “ {(𝑦 / 𝑧)}) ∩ (𝐺 “ {𝑧}))) ∈ ℝ ∧ (vol*‘((𝐹𝑓 · 𝐺) “ {𝑦})) ≤ Σ𝑧 ∈ (ran 𝐺 ∖ {0})(vol*‘((𝐹 “ {(𝑦 / 𝑧)}) ∩ (𝐺 “ {𝑧})))) → (vol*‘((𝐹𝑓 · 𝐺) “ {𝑦})) ∈ ℝ)
9771, 86, 95, 96syl3anc 1490 . . 3 ((𝜑𝑦 ∈ (ran (𝐹𝑓 · 𝐺) ∖ {0})) → (vol*‘((𝐹𝑓 · 𝐺) “ {𝑦})) ∈ ℝ)
9869, 97eqeltrd 2844 . 2 ((𝜑𝑦 ∈ (ran (𝐹𝑓 · 𝐺) ∖ {0})) → (vol‘((𝐹𝑓 · 𝐺) “ {𝑦})) ∈ ℝ)
9912, 46, 67, 98i1fd 23739 1 (𝜑 → (𝐹𝑓 · 𝐺) ∈ dom ∫1)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 384   = wceq 1652  wcel 2155  {cab 2751  wral 3055  wrex 3056  Vcvv 3350  cdif 3729  cin 3731  wss 3732  {csn 4334   ciun 4676   class class class wbr 4809   × cxp 5275  ccnv 5276  dom cdm 5277  ran crn 5278  cima 5280   Fn wfn 6063  wf 6064  ontowfo 6066  cfv 6068  (class class class)co 6842  cmpt2 6844  𝑓 cof 7093  Fincfn 8160  cc 10187  cr 10188  0cc0 10189   · cmul 10194  cle 10329   / cdiv 10938  Σcsu 14703  vol*covol 23520  volcvol 23521  1citg1 23673
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1890  ax-4 1904  ax-5 2005  ax-6 2070  ax-7 2105  ax-8 2157  ax-9 2164  ax-10 2183  ax-11 2198  ax-12 2211  ax-13 2352  ax-ext 2743  ax-rep 4930  ax-sep 4941  ax-nul 4949  ax-pow 5001  ax-pr 5062  ax-un 7147  ax-inf2 8753  ax-cnex 10245  ax-resscn 10246  ax-1cn 10247  ax-icn 10248  ax-addcl 10249  ax-addrcl 10250  ax-mulcl 10251  ax-mulrcl 10252  ax-mulcom 10253  ax-addass 10254  ax-mulass 10255  ax-distr 10256  ax-i2m1 10257  ax-1ne0 10258  ax-1rid 10259  ax-rnegex 10260  ax-rrecex 10261  ax-cnre 10262  ax-pre-lttri 10263  ax-pre-lttrn 10264  ax-pre-ltadd 10265  ax-pre-mulgt0 10266  ax-pre-sup 10267
This theorem depends on definitions:  df-bi 198  df-an 385  df-or 874  df-3or 1108  df-3an 1109  df-tru 1656  df-fal 1666  df-ex 1875  df-nf 1879  df-sb 2063  df-mo 2565  df-eu 2582  df-clab 2752  df-cleq 2758  df-clel 2761  df-nfc 2896  df-ne 2938  df-nel 3041  df-ral 3060  df-rex 3061  df-reu 3062  df-rmo 3063  df-rab 3064  df-v 3352  df-sbc 3597  df-csb 3692  df-dif 3735  df-un 3737  df-in 3739  df-ss 3746  df-pss 3748  df-nul 4080  df-if 4244  df-pw 4317  df-sn 4335  df-pr 4337  df-tp 4339  df-op 4341  df-uni 4595  df-int 4634  df-iun 4678  df-br 4810  df-opab 4872  df-mpt 4889  df-tr 4912  df-id 5185  df-eprel 5190  df-po 5198  df-so 5199  df-fr 5236  df-se 5237  df-we 5238  df-xp 5283  df-rel 5284  df-cnv 5285  df-co 5286  df-dm 5287  df-rn 5288  df-res 5289  df-ima 5290  df-pred 5865  df-ord 5911  df-on 5912  df-lim 5913  df-suc 5914  df-iota 6031  df-fun 6070  df-fn 6071  df-f 6072  df-f1 6073  df-fo 6074  df-f1o 6075  df-fv 6076  df-isom 6077  df-riota 6803  df-ov 6845  df-oprab 6846  df-mpt2 6847  df-of 7095  df-om 7264  df-1st 7366  df-2nd 7367  df-wrecs 7610  df-recs 7672  df-rdg 7710  df-1o 7764  df-2o 7765  df-oadd 7768  df-er 7947  df-map 8062  df-pm 8063  df-en 8161  df-dom 8162  df-sdom 8163  df-fin 8164  df-sup 8555  df-inf 8556  df-oi 8622  df-card 9016  df-cda 9243  df-pnf 10330  df-mnf 10331  df-xr 10332  df-ltxr 10333  df-le 10334  df-sub 10522  df-neg 10523  df-div 10939  df-nn 11275  df-2 11335  df-3 11336  df-n0 11539  df-z 11625  df-uz 11887  df-q 11990  df-rp 12029  df-xadd 12147  df-ioo 12381  df-ico 12383  df-icc 12384  df-fz 12534  df-fzo 12674  df-fl 12801  df-seq 13009  df-exp 13068  df-hash 13322  df-cj 14126  df-re 14127  df-im 14128  df-sqrt 14262  df-abs 14263  df-clim 14506  df-sum 14704  df-xmet 20012  df-met 20013  df-ovol 23522  df-vol 23523  df-mbf 23677  df-itg1 23678
This theorem is referenced by:  mbfmullem2  23782  ftc1anclem3  33842
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