MPE Home Metamath Proof Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  MPE Home  >  Th. List  >  i1fd Structured version   Visualization version   GIF version

Theorem i1fd 23354
Description: A simplified set of assumptions to show that a given function is simple. (Contributed by Mario Carneiro, 26-Jun-2014.)
Hypotheses
Ref Expression
i1fd.1 (𝜑𝐹:ℝ⟶ℝ)
i1fd.2 (𝜑 → ran 𝐹 ∈ Fin)
i1fd.3 ((𝜑𝑥 ∈ (ran 𝐹 ∖ {0})) → (𝐹 “ {𝑥}) ∈ dom vol)
i1fd.4 ((𝜑𝑥 ∈ (ran 𝐹 ∖ {0})) → (vol‘(𝐹 “ {𝑥})) ∈ ℝ)
Assertion
Ref Expression
i1fd (𝜑𝐹 ∈ dom ∫1)
Distinct variable groups:   𝑥,𝐹   𝜑,𝑥

Proof of Theorem i1fd
Dummy variable 𝑦 is distinct from all other variables.
StepHypRef Expression
1 i1fd.1 . . . . . . . . 9 (𝜑𝐹:ℝ⟶ℝ)
21ad2antrr 761 . . . . . . . 8 (((𝜑𝑥 ∈ ran (,)) ∧ 0 ∈ 𝑥) → 𝐹:ℝ⟶ℝ)
3 ffun 6005 . . . . . . . 8 (𝐹:ℝ⟶ℝ → Fun 𝐹)
4 funcnvcnv 5914 . . . . . . . 8 (Fun 𝐹 → Fun 𝐹)
5 imadif 5931 . . . . . . . 8 (Fun 𝐹 → (𝐹 “ (ℝ ∖ (ℝ ∖ 𝑥))) = ((𝐹 “ ℝ) ∖ (𝐹 “ (ℝ ∖ 𝑥))))
62, 3, 4, 54syl 19 . . . . . . 7 (((𝜑𝑥 ∈ ran (,)) ∧ 0 ∈ 𝑥) → (𝐹 “ (ℝ ∖ (ℝ ∖ 𝑥))) = ((𝐹 “ ℝ) ∖ (𝐹 “ (ℝ ∖ 𝑥))))
7 ioof 12213 . . . . . . . . . . . . 13 (,):(ℝ* × ℝ*)⟶𝒫 ℝ
8 frn 6010 . . . . . . . . . . . . 13 ((,):(ℝ* × ℝ*)⟶𝒫 ℝ → ran (,) ⊆ 𝒫 ℝ)
97, 8ax-mp 5 . . . . . . . . . . . 12 ran (,) ⊆ 𝒫 ℝ
109sseli 3579 . . . . . . . . . . 11 (𝑥 ∈ ran (,) → 𝑥 ∈ 𝒫 ℝ)
1110elpwid 4141 . . . . . . . . . 10 (𝑥 ∈ ran (,) → 𝑥 ⊆ ℝ)
1211ad2antlr 762 . . . . . . . . 9 (((𝜑𝑥 ∈ ran (,)) ∧ 0 ∈ 𝑥) → 𝑥 ⊆ ℝ)
13 dfss4 3836 . . . . . . . . 9 (𝑥 ⊆ ℝ ↔ (ℝ ∖ (ℝ ∖ 𝑥)) = 𝑥)
1412, 13sylib 208 . . . . . . . 8 (((𝜑𝑥 ∈ ran (,)) ∧ 0 ∈ 𝑥) → (ℝ ∖ (ℝ ∖ 𝑥)) = 𝑥)
1514imaeq2d 5425 . . . . . . 7 (((𝜑𝑥 ∈ ran (,)) ∧ 0 ∈ 𝑥) → (𝐹 “ (ℝ ∖ (ℝ ∖ 𝑥))) = (𝐹𝑥))
166, 15eqtr3d 2657 . . . . . 6 (((𝜑𝑥 ∈ ran (,)) ∧ 0 ∈ 𝑥) → ((𝐹 “ ℝ) ∖ (𝐹 “ (ℝ ∖ 𝑥))) = (𝐹𝑥))
17 fimacnv 6303 . . . . . . . . 9 (𝐹:ℝ⟶ℝ → (𝐹 “ ℝ) = ℝ)
182, 17syl 17 . . . . . . . 8 (((𝜑𝑥 ∈ ran (,)) ∧ 0 ∈ 𝑥) → (𝐹 “ ℝ) = ℝ)
19 rembl 23215 . . . . . . . 8 ℝ ∈ dom vol
2018, 19syl6eqel 2706 . . . . . . 7 (((𝜑𝑥 ∈ ran (,)) ∧ 0 ∈ 𝑥) → (𝐹 “ ℝ) ∈ dom vol)
211adantr 481 . . . . . . . . . . . . 13 ((𝜑 ∧ ¬ 0 ∈ 𝑦) → 𝐹:ℝ⟶ℝ)
22 inpreima 6298 . . . . . . . . . . . . . 14 (Fun 𝐹 → (𝐹 “ (𝑦 ∩ ran 𝐹)) = ((𝐹𝑦) ∩ (𝐹 “ ran 𝐹)))
23 iunid 4541 . . . . . . . . . . . . . . . 16 𝑥 ∈ (𝑦 ∩ ran 𝐹){𝑥} = (𝑦 ∩ ran 𝐹)
2423imaeq2i 5423 . . . . . . . . . . . . . . 15 (𝐹 𝑥 ∈ (𝑦 ∩ ran 𝐹){𝑥}) = (𝐹 “ (𝑦 ∩ ran 𝐹))
25 imaiun 6457 . . . . . . . . . . . . . . 15 (𝐹 𝑥 ∈ (𝑦 ∩ ran 𝐹){𝑥}) = 𝑥 ∈ (𝑦 ∩ ran 𝐹)(𝐹 “ {𝑥})
2624, 25eqtr3i 2645 . . . . . . . . . . . . . 14 (𝐹 “ (𝑦 ∩ ran 𝐹)) = 𝑥 ∈ (𝑦 ∩ ran 𝐹)(𝐹 “ {𝑥})
27 cnvimass 5444 . . . . . . . . . . . . . . . 16 (𝐹𝑦) ⊆ dom 𝐹
28 cnvimarndm 5445 . . . . . . . . . . . . . . . 16 (𝐹 “ ran 𝐹) = dom 𝐹
2927, 28sseqtr4i 3617 . . . . . . . . . . . . . . 15 (𝐹𝑦) ⊆ (𝐹 “ ran 𝐹)
30 df-ss 3569 . . . . . . . . . . . . . . 15 ((𝐹𝑦) ⊆ (𝐹 “ ran 𝐹) ↔ ((𝐹𝑦) ∩ (𝐹 “ ran 𝐹)) = (𝐹𝑦))
3129, 30mpbi 220 . . . . . . . . . . . . . 14 ((𝐹𝑦) ∩ (𝐹 “ ran 𝐹)) = (𝐹𝑦)
3222, 26, 313eqtr3g 2678 . . . . . . . . . . . . 13 (Fun 𝐹 𝑥 ∈ (𝑦 ∩ ran 𝐹)(𝐹 “ {𝑥}) = (𝐹𝑦))
3321, 3, 323syl 18 . . . . . . . . . . . 12 ((𝜑 ∧ ¬ 0 ∈ 𝑦) → 𝑥 ∈ (𝑦 ∩ ran 𝐹)(𝐹 “ {𝑥}) = (𝐹𝑦))
34 i1fd.2 . . . . . . . . . . . . . . 15 (𝜑 → ran 𝐹 ∈ Fin)
3534adantr 481 . . . . . . . . . . . . . 14 ((𝜑 ∧ ¬ 0 ∈ 𝑦) → ran 𝐹 ∈ Fin)
36 inss2 3812 . . . . . . . . . . . . . 14 (𝑦 ∩ ran 𝐹) ⊆ ran 𝐹
37 ssfi 8124 . . . . . . . . . . . . . 14 ((ran 𝐹 ∈ Fin ∧ (𝑦 ∩ ran 𝐹) ⊆ ran 𝐹) → (𝑦 ∩ ran 𝐹) ∈ Fin)
3835, 36, 37sylancl 693 . . . . . . . . . . . . 13 ((𝜑 ∧ ¬ 0 ∈ 𝑦) → (𝑦 ∩ ran 𝐹) ∈ Fin)
39 simpll 789 . . . . . . . . . . . . . . 15 (((𝜑 ∧ ¬ 0 ∈ 𝑦) ∧ 𝑥 ∈ (𝑦 ∩ ran 𝐹)) → 𝜑)
40 inss1 3811 . . . . . . . . . . . . . . . . . . . . 21 (𝑦 ∩ ran 𝐹) ⊆ 𝑦
4140sseli 3579 . . . . . . . . . . . . . . . . . . . 20 (0 ∈ (𝑦 ∩ ran 𝐹) → 0 ∈ 𝑦)
4241con3i 150 . . . . . . . . . . . . . . . . . . 19 (¬ 0 ∈ 𝑦 → ¬ 0 ∈ (𝑦 ∩ ran 𝐹))
4342adantl 482 . . . . . . . . . . . . . . . . . 18 ((𝜑 ∧ ¬ 0 ∈ 𝑦) → ¬ 0 ∈ (𝑦 ∩ ran 𝐹))
44 disjsn 4216 . . . . . . . . . . . . . . . . . 18 (((𝑦 ∩ ran 𝐹) ∩ {0}) = ∅ ↔ ¬ 0 ∈ (𝑦 ∩ ran 𝐹))
4543, 44sylibr 224 . . . . . . . . . . . . . . . . 17 ((𝜑 ∧ ¬ 0 ∈ 𝑦) → ((𝑦 ∩ ran 𝐹) ∩ {0}) = ∅)
46 reldisj 3992 . . . . . . . . . . . . . . . . . 18 ((𝑦 ∩ ran 𝐹) ⊆ ran 𝐹 → (((𝑦 ∩ ran 𝐹) ∩ {0}) = ∅ ↔ (𝑦 ∩ ran 𝐹) ⊆ (ran 𝐹 ∖ {0})))
4736, 46ax-mp 5 . . . . . . . . . . . . . . . . 17 (((𝑦 ∩ ran 𝐹) ∩ {0}) = ∅ ↔ (𝑦 ∩ ran 𝐹) ⊆ (ran 𝐹 ∖ {0}))
4845, 47sylib 208 . . . . . . . . . . . . . . . 16 ((𝜑 ∧ ¬ 0 ∈ 𝑦) → (𝑦 ∩ ran 𝐹) ⊆ (ran 𝐹 ∖ {0}))
4948sselda 3583 . . . . . . . . . . . . . . 15 (((𝜑 ∧ ¬ 0 ∈ 𝑦) ∧ 𝑥 ∈ (𝑦 ∩ ran 𝐹)) → 𝑥 ∈ (ran 𝐹 ∖ {0}))
50 i1fd.3 . . . . . . . . . . . . . . 15 ((𝜑𝑥 ∈ (ran 𝐹 ∖ {0})) → (𝐹 “ {𝑥}) ∈ dom vol)
5139, 49, 50syl2anc 692 . . . . . . . . . . . . . 14 (((𝜑 ∧ ¬ 0 ∈ 𝑦) ∧ 𝑥 ∈ (𝑦 ∩ ran 𝐹)) → (𝐹 “ {𝑥}) ∈ dom vol)
5251ralrimiva 2960 . . . . . . . . . . . . 13 ((𝜑 ∧ ¬ 0 ∈ 𝑦) → ∀𝑥 ∈ (𝑦 ∩ ran 𝐹)(𝐹 “ {𝑥}) ∈ dom vol)
53 finiunmbl 23219 . . . . . . . . . . . . 13 (((𝑦 ∩ ran 𝐹) ∈ Fin ∧ ∀𝑥 ∈ (𝑦 ∩ ran 𝐹)(𝐹 “ {𝑥}) ∈ dom vol) → 𝑥 ∈ (𝑦 ∩ ran 𝐹)(𝐹 “ {𝑥}) ∈ dom vol)
5438, 52, 53syl2anc 692 . . . . . . . . . . . 12 ((𝜑 ∧ ¬ 0 ∈ 𝑦) → 𝑥 ∈ (𝑦 ∩ ran 𝐹)(𝐹 “ {𝑥}) ∈ dom vol)
5533, 54eqeltrrd 2699 . . . . . . . . . . 11 ((𝜑 ∧ ¬ 0 ∈ 𝑦) → (𝐹𝑦) ∈ dom vol)
5655ex 450 . . . . . . . . . 10 (𝜑 → (¬ 0 ∈ 𝑦 → (𝐹𝑦) ∈ dom vol))
5756alrimiv 1852 . . . . . . . . 9 (𝜑 → ∀𝑦(¬ 0 ∈ 𝑦 → (𝐹𝑦) ∈ dom vol))
5857ad2antrr 761 . . . . . . . 8 (((𝜑𝑥 ∈ ran (,)) ∧ 0 ∈ 𝑥) → ∀𝑦(¬ 0 ∈ 𝑦 → (𝐹𝑦) ∈ dom vol))
59 elndif 3712 . . . . . . . . 9 (0 ∈ 𝑥 → ¬ 0 ∈ (ℝ ∖ 𝑥))
6059adantl 482 . . . . . . . 8 (((𝜑𝑥 ∈ ran (,)) ∧ 0 ∈ 𝑥) → ¬ 0 ∈ (ℝ ∖ 𝑥))
61 reex 9971 . . . . . . . . . 10 ℝ ∈ V
62 difexg 4768 . . . . . . . . . 10 (ℝ ∈ V → (ℝ ∖ 𝑥) ∈ V)
6361, 62ax-mp 5 . . . . . . . . 9 (ℝ ∖ 𝑥) ∈ V
64 eleq2 2687 . . . . . . . . . . 11 (𝑦 = (ℝ ∖ 𝑥) → (0 ∈ 𝑦 ↔ 0 ∈ (ℝ ∖ 𝑥)))
6564notbid 308 . . . . . . . . . 10 (𝑦 = (ℝ ∖ 𝑥) → (¬ 0 ∈ 𝑦 ↔ ¬ 0 ∈ (ℝ ∖ 𝑥)))
66 imaeq2 5421 . . . . . . . . . . 11 (𝑦 = (ℝ ∖ 𝑥) → (𝐹𝑦) = (𝐹 “ (ℝ ∖ 𝑥)))
6766eleq1d 2683 . . . . . . . . . 10 (𝑦 = (ℝ ∖ 𝑥) → ((𝐹𝑦) ∈ dom vol ↔ (𝐹 “ (ℝ ∖ 𝑥)) ∈ dom vol))
6865, 67imbi12d 334 . . . . . . . . 9 (𝑦 = (ℝ ∖ 𝑥) → ((¬ 0 ∈ 𝑦 → (𝐹𝑦) ∈ dom vol) ↔ (¬ 0 ∈ (ℝ ∖ 𝑥) → (𝐹 “ (ℝ ∖ 𝑥)) ∈ dom vol)))
6963, 68spcv 3285 . . . . . . . 8 (∀𝑦(¬ 0 ∈ 𝑦 → (𝐹𝑦) ∈ dom vol) → (¬ 0 ∈ (ℝ ∖ 𝑥) → (𝐹 “ (ℝ ∖ 𝑥)) ∈ dom vol))
7058, 60, 69sylc 65 . . . . . . 7 (((𝜑𝑥 ∈ ran (,)) ∧ 0 ∈ 𝑥) → (𝐹 “ (ℝ ∖ 𝑥)) ∈ dom vol)
71 difmbl 23218 . . . . . . 7 (((𝐹 “ ℝ) ∈ dom vol ∧ (𝐹 “ (ℝ ∖ 𝑥)) ∈ dom vol) → ((𝐹 “ ℝ) ∖ (𝐹 “ (ℝ ∖ 𝑥))) ∈ dom vol)
7220, 70, 71syl2anc 692 . . . . . 6 (((𝜑𝑥 ∈ ran (,)) ∧ 0 ∈ 𝑥) → ((𝐹 “ ℝ) ∖ (𝐹 “ (ℝ ∖ 𝑥))) ∈ dom vol)
7316, 72eqeltrrd 2699 . . . . 5 (((𝜑𝑥 ∈ ran (,)) ∧ 0 ∈ 𝑥) → (𝐹𝑥) ∈ dom vol)
74 eleq2 2687 . . . . . . . . . . 11 (𝑦 = 𝑥 → (0 ∈ 𝑦 ↔ 0 ∈ 𝑥))
7574notbid 308 . . . . . . . . . 10 (𝑦 = 𝑥 → (¬ 0 ∈ 𝑦 ↔ ¬ 0 ∈ 𝑥))
76 imaeq2 5421 . . . . . . . . . . 11 (𝑦 = 𝑥 → (𝐹𝑦) = (𝐹𝑥))
7776eleq1d 2683 . . . . . . . . . 10 (𝑦 = 𝑥 → ((𝐹𝑦) ∈ dom vol ↔ (𝐹𝑥) ∈ dom vol))
7875, 77imbi12d 334 . . . . . . . . 9 (𝑦 = 𝑥 → ((¬ 0 ∈ 𝑦 → (𝐹𝑦) ∈ dom vol) ↔ (¬ 0 ∈ 𝑥 → (𝐹𝑥) ∈ dom vol)))
7978spv 2259 . . . . . . . 8 (∀𝑦(¬ 0 ∈ 𝑦 → (𝐹𝑦) ∈ dom vol) → (¬ 0 ∈ 𝑥 → (𝐹𝑥) ∈ dom vol))
8057, 79syl 17 . . . . . . 7 (𝜑 → (¬ 0 ∈ 𝑥 → (𝐹𝑥) ∈ dom vol))
8180imp 445 . . . . . 6 ((𝜑 ∧ ¬ 0 ∈ 𝑥) → (𝐹𝑥) ∈ dom vol)
8281adantlr 750 . . . . 5 (((𝜑𝑥 ∈ ran (,)) ∧ ¬ 0 ∈ 𝑥) → (𝐹𝑥) ∈ dom vol)
8373, 82pm2.61dan 831 . . . 4 ((𝜑𝑥 ∈ ran (,)) → (𝐹𝑥) ∈ dom vol)
8483ralrimiva 2960 . . 3 (𝜑 → ∀𝑥 ∈ ran (,)(𝐹𝑥) ∈ dom vol)
85 ismbf 23303 . . . 4 (𝐹:ℝ⟶ℝ → (𝐹 ∈ MblFn ↔ ∀𝑥 ∈ ran (,)(𝐹𝑥) ∈ dom vol))
861, 85syl 17 . . 3 (𝜑 → (𝐹 ∈ MblFn ↔ ∀𝑥 ∈ ran (,)(𝐹𝑥) ∈ dom vol))
8784, 86mpbird 247 . 2 (𝜑𝐹 ∈ MblFn)
88 mblvol 23205 . . . . . . . 8 ((𝐹𝑦) ∈ dom vol → (vol‘(𝐹𝑦)) = (vol*‘(𝐹𝑦)))
8955, 88syl 17 . . . . . . 7 ((𝜑 ∧ ¬ 0 ∈ 𝑦) → (vol‘(𝐹𝑦)) = (vol*‘(𝐹𝑦)))
90 mblss 23206 . . . . . . . . 9 ((𝐹𝑦) ∈ dom vol → (𝐹𝑦) ⊆ ℝ)
9155, 90syl 17 . . . . . . . 8 ((𝜑 ∧ ¬ 0 ∈ 𝑦) → (𝐹𝑦) ⊆ ℝ)
92 mblvol 23205 . . . . . . . . . . 11 ((𝐹 “ {𝑥}) ∈ dom vol → (vol‘(𝐹 “ {𝑥})) = (vol*‘(𝐹 “ {𝑥})))
9351, 92syl 17 . . . . . . . . . 10 (((𝜑 ∧ ¬ 0 ∈ 𝑦) ∧ 𝑥 ∈ (𝑦 ∩ ran 𝐹)) → (vol‘(𝐹 “ {𝑥})) = (vol*‘(𝐹 “ {𝑥})))
94 i1fd.4 . . . . . . . . . . 11 ((𝜑𝑥 ∈ (ran 𝐹 ∖ {0})) → (vol‘(𝐹 “ {𝑥})) ∈ ℝ)
9539, 49, 94syl2anc 692 . . . . . . . . . 10 (((𝜑 ∧ ¬ 0 ∈ 𝑦) ∧ 𝑥 ∈ (𝑦 ∩ ran 𝐹)) → (vol‘(𝐹 “ {𝑥})) ∈ ℝ)
9693, 95eqeltrrd 2699 . . . . . . . . 9 (((𝜑 ∧ ¬ 0 ∈ 𝑦) ∧ 𝑥 ∈ (𝑦 ∩ ran 𝐹)) → (vol*‘(𝐹 “ {𝑥})) ∈ ℝ)
9738, 96fsumrecl 14398 . . . . . . . 8 ((𝜑 ∧ ¬ 0 ∈ 𝑦) → Σ𝑥 ∈ (𝑦 ∩ ran 𝐹)(vol*‘(𝐹 “ {𝑥})) ∈ ℝ)
9833fveq2d 6152 . . . . . . . . 9 ((𝜑 ∧ ¬ 0 ∈ 𝑦) → (vol*‘ 𝑥 ∈ (𝑦 ∩ ran 𝐹)(𝐹 “ {𝑥})) = (vol*‘(𝐹𝑦)))
99 mblss 23206 . . . . . . . . . . . . 13 ((𝐹 “ {𝑥}) ∈ dom vol → (𝐹 “ {𝑥}) ⊆ ℝ)
10051, 99syl 17 . . . . . . . . . . . 12 (((𝜑 ∧ ¬ 0 ∈ 𝑦) ∧ 𝑥 ∈ (𝑦 ∩ ran 𝐹)) → (𝐹 “ {𝑥}) ⊆ ℝ)
101100, 96jca 554 . . . . . . . . . . 11 (((𝜑 ∧ ¬ 0 ∈ 𝑦) ∧ 𝑥 ∈ (𝑦 ∩ ran 𝐹)) → ((𝐹 “ {𝑥}) ⊆ ℝ ∧ (vol*‘(𝐹 “ {𝑥})) ∈ ℝ))
102101ralrimiva 2960 . . . . . . . . . 10 ((𝜑 ∧ ¬ 0 ∈ 𝑦) → ∀𝑥 ∈ (𝑦 ∩ ran 𝐹)((𝐹 “ {𝑥}) ⊆ ℝ ∧ (vol*‘(𝐹 “ {𝑥})) ∈ ℝ))
103 ovolfiniun 23176 . . . . . . . . . 10 (((𝑦 ∩ ran 𝐹) ∈ Fin ∧ ∀𝑥 ∈ (𝑦 ∩ ran 𝐹)((𝐹 “ {𝑥}) ⊆ ℝ ∧ (vol*‘(𝐹 “ {𝑥})) ∈ ℝ)) → (vol*‘ 𝑥 ∈ (𝑦 ∩ ran 𝐹)(𝐹 “ {𝑥})) ≤ Σ𝑥 ∈ (𝑦 ∩ ran 𝐹)(vol*‘(𝐹 “ {𝑥})))
10438, 102, 103syl2anc 692 . . . . . . . . 9 ((𝜑 ∧ ¬ 0 ∈ 𝑦) → (vol*‘ 𝑥 ∈ (𝑦 ∩ ran 𝐹)(𝐹 “ {𝑥})) ≤ Σ𝑥 ∈ (𝑦 ∩ ran 𝐹)(vol*‘(𝐹 “ {𝑥})))
10598, 104eqbrtrrd 4637 . . . . . . . 8 ((𝜑 ∧ ¬ 0 ∈ 𝑦) → (vol*‘(𝐹𝑦)) ≤ Σ𝑥 ∈ (𝑦 ∩ ran 𝐹)(vol*‘(𝐹 “ {𝑥})))
106 ovollecl 23158 . . . . . . . 8 (((𝐹𝑦) ⊆ ℝ ∧ Σ𝑥 ∈ (𝑦 ∩ ran 𝐹)(vol*‘(𝐹 “ {𝑥})) ∈ ℝ ∧ (vol*‘(𝐹𝑦)) ≤ Σ𝑥 ∈ (𝑦 ∩ ran 𝐹)(vol*‘(𝐹 “ {𝑥}))) → (vol*‘(𝐹𝑦)) ∈ ℝ)
10791, 97, 105, 106syl3anc 1323 . . . . . . 7 ((𝜑 ∧ ¬ 0 ∈ 𝑦) → (vol*‘(𝐹𝑦)) ∈ ℝ)
10889, 107eqeltrd 2698 . . . . . 6 ((𝜑 ∧ ¬ 0 ∈ 𝑦) → (vol‘(𝐹𝑦)) ∈ ℝ)
109108ex 450 . . . . 5 (𝜑 → (¬ 0 ∈ 𝑦 → (vol‘(𝐹𝑦)) ∈ ℝ))
110109alrimiv 1852 . . . 4 (𝜑 → ∀𝑦(¬ 0 ∈ 𝑦 → (vol‘(𝐹𝑦)) ∈ ℝ))
111 neldifsn 4290 . . . 4 ¬ 0 ∈ (ℝ ∖ {0})
112 difexg 4768 . . . . . 6 (ℝ ∈ V → (ℝ ∖ {0}) ∈ V)
11361, 112ax-mp 5 . . . . 5 (ℝ ∖ {0}) ∈ V
114 eleq2 2687 . . . . . . 7 (𝑦 = (ℝ ∖ {0}) → (0 ∈ 𝑦 ↔ 0 ∈ (ℝ ∖ {0})))
115114notbid 308 . . . . . 6 (𝑦 = (ℝ ∖ {0}) → (¬ 0 ∈ 𝑦 ↔ ¬ 0 ∈ (ℝ ∖ {0})))
116 imaeq2 5421 . . . . . . . 8 (𝑦 = (ℝ ∖ {0}) → (𝐹𝑦) = (𝐹 “ (ℝ ∖ {0})))
117116fveq2d 6152 . . . . . . 7 (𝑦 = (ℝ ∖ {0}) → (vol‘(𝐹𝑦)) = (vol‘(𝐹 “ (ℝ ∖ {0}))))
118117eleq1d 2683 . . . . . 6 (𝑦 = (ℝ ∖ {0}) → ((vol‘(𝐹𝑦)) ∈ ℝ ↔ (vol‘(𝐹 “ (ℝ ∖ {0}))) ∈ ℝ))
119115, 118imbi12d 334 . . . . 5 (𝑦 = (ℝ ∖ {0}) → ((¬ 0 ∈ 𝑦 → (vol‘(𝐹𝑦)) ∈ ℝ) ↔ (¬ 0 ∈ (ℝ ∖ {0}) → (vol‘(𝐹 “ (ℝ ∖ {0}))) ∈ ℝ)))
120113, 119spcv 3285 . . . 4 (∀𝑦(¬ 0 ∈ 𝑦 → (vol‘(𝐹𝑦)) ∈ ℝ) → (¬ 0 ∈ (ℝ ∖ {0}) → (vol‘(𝐹 “ (ℝ ∖ {0}))) ∈ ℝ))
121110, 111, 120mpisyl 21 . . 3 (𝜑 → (vol‘(𝐹 “ (ℝ ∖ {0}))) ∈ ℝ)
1221, 34, 1213jca 1240 . 2 (𝜑 → (𝐹:ℝ⟶ℝ ∧ ran 𝐹 ∈ Fin ∧ (vol‘(𝐹 “ (ℝ ∖ {0}))) ∈ ℝ))
123 isi1f 23347 . 2 (𝐹 ∈ dom ∫1 ↔ (𝐹 ∈ MblFn ∧ (𝐹:ℝ⟶ℝ ∧ ran 𝐹 ∈ Fin ∧ (vol‘(𝐹 “ (ℝ ∖ {0}))) ∈ ℝ)))
12487, 122, 123sylanbrc 697 1 (𝜑𝐹 ∈ dom ∫1)
Colors of variables: wff setvar class
Syntax hints:  ¬ wn 3  wi 4  wb 196  wa 384  w3a 1036  wal 1478   = wceq 1480  wcel 1987  wral 2907  Vcvv 3186  cdif 3552  cin 3554  wss 3555  c0 3891  𝒫 cpw 4130  {csn 4148   ciun 4485   class class class wbr 4613   × cxp 5072  ccnv 5073  dom cdm 5074  ran crn 5075  cima 5077  Fun wfun 5841  wf 5843  cfv 5847  Fincfn 7899  cr 9879  0cc0 9880  *cxr 10017  cle 10019  (,)cioo 12117  Σcsu 14350  vol*covol 23138  volcvol 23139  MblFncmbf 23289  1citg1 23290
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1719  ax-4 1734  ax-5 1836  ax-6 1885  ax-7 1932  ax-8 1989  ax-9 1996  ax-10 2016  ax-11 2031  ax-12 2044  ax-13 2245  ax-ext 2601  ax-rep 4731  ax-sep 4741  ax-nul 4749  ax-pow 4803  ax-pr 4867  ax-un 6902  ax-inf2 8482  ax-cnex 9936  ax-resscn 9937  ax-1cn 9938  ax-icn 9939  ax-addcl 9940  ax-addrcl 9941  ax-mulcl 9942  ax-mulrcl 9943  ax-mulcom 9944  ax-addass 9945  ax-mulass 9946  ax-distr 9947  ax-i2m1 9948  ax-1ne0 9949  ax-1rid 9950  ax-rnegex 9951  ax-rrecex 9952  ax-cnre 9953  ax-pre-lttri 9954  ax-pre-lttrn 9955  ax-pre-ltadd 9956  ax-pre-mulgt0 9957  ax-pre-sup 9958
This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3or 1037  df-3an 1038  df-tru 1483  df-fal 1486  df-ex 1702  df-nf 1707  df-sb 1878  df-eu 2473  df-mo 2474  df-clab 2608  df-cleq 2614  df-clel 2617  df-nfc 2750  df-ne 2791  df-nel 2894  df-ral 2912  df-rex 2913  df-reu 2914  df-rmo 2915  df-rab 2916  df-v 3188  df-sbc 3418  df-csb 3515  df-dif 3558  df-un 3560  df-in 3562  df-ss 3569  df-pss 3571  df-nul 3892  df-if 4059  df-pw 4132  df-sn 4149  df-pr 4151  df-tp 4153  df-op 4155  df-uni 4403  df-int 4441  df-iun 4487  df-br 4614  df-opab 4674  df-mpt 4675  df-tr 4713  df-eprel 4985  df-id 4989  df-po 4995  df-so 4996  df-fr 5033  df-se 5034  df-we 5035  df-xp 5080  df-rel 5081  df-cnv 5082  df-co 5083  df-dm 5084  df-rn 5085  df-res 5086  df-ima 5087  df-pred 5639  df-ord 5685  df-on 5686  df-lim 5687  df-suc 5688  df-iota 5810  df-fun 5849  df-fn 5850  df-f 5851  df-f1 5852  df-fo 5853  df-f1o 5854  df-fv 5855  df-isom 5856  df-riota 6565  df-ov 6607  df-oprab 6608  df-mpt2 6609  df-of 6850  df-om 7013  df-1st 7113  df-2nd 7114  df-wrecs 7352  df-recs 7413  df-rdg 7451  df-1o 7505  df-2o 7506  df-oadd 7509  df-er 7687  df-map 7804  df-pm 7805  df-en 7900  df-dom 7901  df-sdom 7902  df-fin 7903  df-sup 8292  df-inf 8293  df-oi 8359  df-card 8709  df-cda 8934  df-pnf 10020  df-mnf 10021  df-xr 10022  df-ltxr 10023  df-le 10024  df-sub 10212  df-neg 10213  df-div 10629  df-nn 10965  df-2 11023  df-3 11024  df-n0 11237  df-z 11322  df-uz 11632  df-q 11733  df-rp 11777  df-xadd 11891  df-ioo 12121  df-ico 12123  df-icc 12124  df-fz 12269  df-fzo 12407  df-fl 12533  df-seq 12742  df-exp 12801  df-hash 13058  df-cj 13773  df-re 13774  df-im 13775  df-sqrt 13909  df-abs 13910  df-clim 14153  df-sum 14351  df-xmet 19658  df-met 19659  df-ovol 23140  df-vol 23141  df-mbf 23294  df-itg1 23295
This theorem is referenced by:  i1f0  23360  i1f1  23363  i1fadd  23368  i1fmul  23369  i1fmulc  23376  i1fres  23378  mbfi1fseqlem4  23391  itg2addnclem2  33094  ftc1anclem3  33119
  Copyright terms: Public domain W3C validator