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Mirrors > Home > MPE Home > Th. List > itg1sub | Structured version Visualization version GIF version |
Description: The integral of a difference of two simple functions. (Contributed by Mario Carneiro, 6-Aug-2014.) |
Ref | Expression |
---|---|
itg1sub | ⊢ ((𝐹 ∈ dom ∫1 ∧ 𝐺 ∈ dom ∫1) → (∫1‘(𝐹 ∘𝑓 − 𝐺)) = ((∫1‘𝐹) − (∫1‘𝐺))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | simpl 472 | . . . 4 ⊢ ((𝐹 ∈ dom ∫1 ∧ 𝐺 ∈ dom ∫1) → 𝐹 ∈ dom ∫1) | |
2 | simpr 476 | . . . . 5 ⊢ ((𝐹 ∈ dom ∫1 ∧ 𝐺 ∈ dom ∫1) → 𝐺 ∈ dom ∫1) | |
3 | neg1rr 11002 | . . . . . 6 ⊢ -1 ∈ ℝ | |
4 | 3 | a1i 11 | . . . . 5 ⊢ ((𝐹 ∈ dom ∫1 ∧ 𝐺 ∈ dom ∫1) → -1 ∈ ℝ) |
5 | 2, 4 | i1fmulc 23276 | . . . 4 ⊢ ((𝐹 ∈ dom ∫1 ∧ 𝐺 ∈ dom ∫1) → ((ℝ × {-1}) ∘𝑓 · 𝐺) ∈ dom ∫1) |
6 | 1, 5 | itg1add 23274 | . . 3 ⊢ ((𝐹 ∈ dom ∫1 ∧ 𝐺 ∈ dom ∫1) → (∫1‘(𝐹 ∘𝑓 + ((ℝ × {-1}) ∘𝑓 · 𝐺))) = ((∫1‘𝐹) + (∫1‘((ℝ × {-1}) ∘𝑓 · 𝐺)))) |
7 | 2, 4 | itg1mulc 23277 | . . . . 5 ⊢ ((𝐹 ∈ dom ∫1 ∧ 𝐺 ∈ dom ∫1) → (∫1‘((ℝ × {-1}) ∘𝑓 · 𝐺)) = (-1 · (∫1‘𝐺))) |
8 | itg1cl 23258 | . . . . . . . 8 ⊢ (𝐺 ∈ dom ∫1 → (∫1‘𝐺) ∈ ℝ) | |
9 | 8 | recnd 9947 | . . . . . . 7 ⊢ (𝐺 ∈ dom ∫1 → (∫1‘𝐺) ∈ ℂ) |
10 | 2, 9 | syl 17 | . . . . . 6 ⊢ ((𝐹 ∈ dom ∫1 ∧ 𝐺 ∈ dom ∫1) → (∫1‘𝐺) ∈ ℂ) |
11 | 10 | mulm1d 10361 | . . . . 5 ⊢ ((𝐹 ∈ dom ∫1 ∧ 𝐺 ∈ dom ∫1) → (-1 · (∫1‘𝐺)) = -(∫1‘𝐺)) |
12 | 7, 11 | eqtrd 2644 | . . . 4 ⊢ ((𝐹 ∈ dom ∫1 ∧ 𝐺 ∈ dom ∫1) → (∫1‘((ℝ × {-1}) ∘𝑓 · 𝐺)) = -(∫1‘𝐺)) |
13 | 12 | oveq2d 6565 | . . 3 ⊢ ((𝐹 ∈ dom ∫1 ∧ 𝐺 ∈ dom ∫1) → ((∫1‘𝐹) + (∫1‘((ℝ × {-1}) ∘𝑓 · 𝐺))) = ((∫1‘𝐹) + -(∫1‘𝐺))) |
14 | 6, 13 | eqtrd 2644 | . 2 ⊢ ((𝐹 ∈ dom ∫1 ∧ 𝐺 ∈ dom ∫1) → (∫1‘(𝐹 ∘𝑓 + ((ℝ × {-1}) ∘𝑓 · 𝐺))) = ((∫1‘𝐹) + -(∫1‘𝐺))) |
15 | i1ff 23249 | . . . . 5 ⊢ (𝐹 ∈ dom ∫1 → 𝐹:ℝ⟶ℝ) | |
16 | ax-resscn 9872 | . . . . 5 ⊢ ℝ ⊆ ℂ | |
17 | fss 5969 | . . . . 5 ⊢ ((𝐹:ℝ⟶ℝ ∧ ℝ ⊆ ℂ) → 𝐹:ℝ⟶ℂ) | |
18 | 15, 16, 17 | sylancl 693 | . . . 4 ⊢ (𝐹 ∈ dom ∫1 → 𝐹:ℝ⟶ℂ) |
19 | i1ff 23249 | . . . . 5 ⊢ (𝐺 ∈ dom ∫1 → 𝐺:ℝ⟶ℝ) | |
20 | fss 5969 | . . . . 5 ⊢ ((𝐺:ℝ⟶ℝ ∧ ℝ ⊆ ℂ) → 𝐺:ℝ⟶ℂ) | |
21 | 19, 16, 20 | sylancl 693 | . . . 4 ⊢ (𝐺 ∈ dom ∫1 → 𝐺:ℝ⟶ℂ) |
22 | reex 9906 | . . . . 5 ⊢ ℝ ∈ V | |
23 | ofnegsub 10895 | . . . . 5 ⊢ ((ℝ ∈ V ∧ 𝐹:ℝ⟶ℂ ∧ 𝐺:ℝ⟶ℂ) → (𝐹 ∘𝑓 + ((ℝ × {-1}) ∘𝑓 · 𝐺)) = (𝐹 ∘𝑓 − 𝐺)) | |
24 | 22, 23 | mp3an1 1403 | . . . 4 ⊢ ((𝐹:ℝ⟶ℂ ∧ 𝐺:ℝ⟶ℂ) → (𝐹 ∘𝑓 + ((ℝ × {-1}) ∘𝑓 · 𝐺)) = (𝐹 ∘𝑓 − 𝐺)) |
25 | 18, 21, 24 | syl2an 493 | . . 3 ⊢ ((𝐹 ∈ dom ∫1 ∧ 𝐺 ∈ dom ∫1) → (𝐹 ∘𝑓 + ((ℝ × {-1}) ∘𝑓 · 𝐺)) = (𝐹 ∘𝑓 − 𝐺)) |
26 | 25 | fveq2d 6107 | . 2 ⊢ ((𝐹 ∈ dom ∫1 ∧ 𝐺 ∈ dom ∫1) → (∫1‘(𝐹 ∘𝑓 + ((ℝ × {-1}) ∘𝑓 · 𝐺))) = (∫1‘(𝐹 ∘𝑓 − 𝐺))) |
27 | itg1cl 23258 | . . . 4 ⊢ (𝐹 ∈ dom ∫1 → (∫1‘𝐹) ∈ ℝ) | |
28 | 27 | recnd 9947 | . . 3 ⊢ (𝐹 ∈ dom ∫1 → (∫1‘𝐹) ∈ ℂ) |
29 | negsub 10208 | . . 3 ⊢ (((∫1‘𝐹) ∈ ℂ ∧ (∫1‘𝐺) ∈ ℂ) → ((∫1‘𝐹) + -(∫1‘𝐺)) = ((∫1‘𝐹) − (∫1‘𝐺))) | |
30 | 28, 9, 29 | syl2an 493 | . 2 ⊢ ((𝐹 ∈ dom ∫1 ∧ 𝐺 ∈ dom ∫1) → ((∫1‘𝐹) + -(∫1‘𝐺)) = ((∫1‘𝐹) − (∫1‘𝐺))) |
31 | 14, 26, 30 | 3eqtr3d 2652 | 1 ⊢ ((𝐹 ∈ dom ∫1 ∧ 𝐺 ∈ dom ∫1) → (∫1‘(𝐹 ∘𝑓 − 𝐺)) = ((∫1‘𝐹) − (∫1‘𝐺))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 383 = wceq 1475 ∈ wcel 1977 Vcvv 3173 ⊆ wss 3540 {csn 4125 × cxp 5036 dom cdm 5038 ⟶wf 5800 ‘cfv 5804 (class class class)co 6549 ∘𝑓 cof 6793 ℂcc 9813 ℝcr 9814 1c1 9816 + caddc 9818 · cmul 9820 − cmin 10145 -cneg 10146 ∫1citg1 23190 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1713 ax-4 1728 ax-5 1827 ax-6 1875 ax-7 1922 ax-8 1979 ax-9 1986 ax-10 2006 ax-11 2021 ax-12 2034 ax-13 2234 ax-ext 2590 ax-rep 4699 ax-sep 4709 ax-nul 4717 ax-pow 4769 ax-pr 4833 ax-un 6847 ax-inf2 8421 ax-cnex 9871 ax-resscn 9872 ax-1cn 9873 ax-icn 9874 ax-addcl 9875 ax-addrcl 9876 ax-mulcl 9877 ax-mulrcl 9878 ax-mulcom 9879 ax-addass 9880 ax-mulass 9881 ax-distr 9882 ax-i2m1 9883 ax-1ne0 9884 ax-1rid 9885 ax-rnegex 9886 ax-rrecex 9887 ax-cnre 9888 ax-pre-lttri 9889 ax-pre-lttrn 9890 ax-pre-ltadd 9891 ax-pre-mulgt0 9892 ax-pre-sup 9893 ax-addf 9894 |
This theorem depends on definitions: df-bi 196 df-or 384 df-an 385 df-3or 1032 df-3an 1033 df-tru 1478 df-fal 1481 df-ex 1696 df-nf 1701 df-sb 1868 df-eu 2462 df-mo 2463 df-clab 2597 df-cleq 2603 df-clel 2606 df-nfc 2740 df-ne 2782 df-nel 2783 df-ral 2901 df-rex 2902 df-reu 2903 df-rmo 2904 df-rab 2905 df-v 3175 df-sbc 3403 df-csb 3500 df-dif 3543 df-un 3545 df-in 3547 df-ss 3554 df-pss 3556 df-nul 3875 df-if 4037 df-pw 4110 df-sn 4126 df-pr 4128 df-tp 4130 df-op 4132 df-uni 4373 df-int 4411 df-iun 4457 df-disj 4554 df-br 4584 df-opab 4644 df-mpt 4645 df-tr 4681 df-eprel 4949 df-id 4953 df-po 4959 df-so 4960 df-fr 4997 df-se 4998 df-we 4999 df-xp 5044 df-rel 5045 df-cnv 5046 df-co 5047 df-dm 5048 df-rn 5049 df-res 5050 df-ima 5051 df-pred 5597 df-ord 5643 df-on 5644 df-lim 5645 df-suc 5646 df-iota 5768 df-fun 5806 df-fn 5807 df-f 5808 df-f1 5809 df-fo 5810 df-f1o 5811 df-fv 5812 df-isom 5813 df-riota 6511 df-ov 6552 df-oprab 6553 df-mpt2 6554 df-of 6795 df-om 6958 df-1st 7059 df-2nd 7060 df-wrecs 7294 df-recs 7355 df-rdg 7393 df-1o 7447 df-2o 7448 df-oadd 7451 df-er 7629 df-map 7746 df-pm 7747 df-en 7842 df-dom 7843 df-sdom 7844 df-fin 7845 df-sup 8231 df-inf 8232 df-oi 8298 df-card 8648 df-cda 8873 df-pnf 9955 df-mnf 9956 df-xr 9957 df-ltxr 9958 df-le 9959 df-sub 10147 df-neg 10148 df-div 10564 df-nn 10898 df-2 10956 df-3 10957 df-n0 11170 df-z 11255 df-uz 11564 df-q 11665 df-rp 11709 df-xadd 11823 df-ioo 12050 df-ico 12052 df-icc 12053 df-fz 12198 df-fzo 12335 df-fl 12455 df-seq 12664 df-exp 12723 df-hash 12980 df-cj 13687 df-re 13688 df-im 13689 df-sqrt 13823 df-abs 13824 df-clim 14067 df-sum 14265 df-xmet 19560 df-met 19561 df-ovol 23040 df-vol 23041 df-mbf 23194 df-itg1 23195 |
This theorem is referenced by: itg1lea 23285 itgitg1 23381 itg2addnclem 32631 |
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