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Mirrors > Home > MPE Home > Th. List > i1fsub | Structured version Visualization version GIF version |
Description: The difference of two simple functions is a simple function. (Contributed by Mario Carneiro, 6-Aug-2014.) |
Ref | Expression |
---|---|
i1fsub | ⊢ ((𝐹 ∈ dom ∫1 ∧ 𝐺 ∈ dom ∫1) → (𝐹 ∘f − 𝐺) ∈ dom ∫1) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | reex 10820 | . . 3 ⊢ ℝ ∈ V | |
2 | i1ff 24573 | . . . 4 ⊢ (𝐹 ∈ dom ∫1 → 𝐹:ℝ⟶ℝ) | |
3 | ax-resscn 10786 | . . . 4 ⊢ ℝ ⊆ ℂ | |
4 | fss 6562 | . . . 4 ⊢ ((𝐹:ℝ⟶ℝ ∧ ℝ ⊆ ℂ) → 𝐹:ℝ⟶ℂ) | |
5 | 2, 3, 4 | sylancl 589 | . . 3 ⊢ (𝐹 ∈ dom ∫1 → 𝐹:ℝ⟶ℂ) |
6 | i1ff 24573 | . . . 4 ⊢ (𝐺 ∈ dom ∫1 → 𝐺:ℝ⟶ℝ) | |
7 | fss 6562 | . . . 4 ⊢ ((𝐺:ℝ⟶ℝ ∧ ℝ ⊆ ℂ) → 𝐺:ℝ⟶ℂ) | |
8 | 6, 3, 7 | sylancl 589 | . . 3 ⊢ (𝐺 ∈ dom ∫1 → 𝐺:ℝ⟶ℂ) |
9 | ofnegsub 11828 | . . 3 ⊢ ((ℝ ∈ V ∧ 𝐹:ℝ⟶ℂ ∧ 𝐺:ℝ⟶ℂ) → (𝐹 ∘f + ((ℝ × {-1}) ∘f · 𝐺)) = (𝐹 ∘f − 𝐺)) | |
10 | 1, 5, 8, 9 | mp3an3an 1469 | . 2 ⊢ ((𝐹 ∈ dom ∫1 ∧ 𝐺 ∈ dom ∫1) → (𝐹 ∘f + ((ℝ × {-1}) ∘f · 𝐺)) = (𝐹 ∘f − 𝐺)) |
11 | simpl 486 | . . 3 ⊢ ((𝐹 ∈ dom ∫1 ∧ 𝐺 ∈ dom ∫1) → 𝐹 ∈ dom ∫1) | |
12 | simpr 488 | . . . 4 ⊢ ((𝐹 ∈ dom ∫1 ∧ 𝐺 ∈ dom ∫1) → 𝐺 ∈ dom ∫1) | |
13 | neg1rr 11945 | . . . . 5 ⊢ -1 ∈ ℝ | |
14 | 13 | a1i 11 | . . . 4 ⊢ ((𝐹 ∈ dom ∫1 ∧ 𝐺 ∈ dom ∫1) → -1 ∈ ℝ) |
15 | 12, 14 | i1fmulc 24601 | . . 3 ⊢ ((𝐹 ∈ dom ∫1 ∧ 𝐺 ∈ dom ∫1) → ((ℝ × {-1}) ∘f · 𝐺) ∈ dom ∫1) |
16 | 11, 15 | i1fadd 24592 | . 2 ⊢ ((𝐹 ∈ dom ∫1 ∧ 𝐺 ∈ dom ∫1) → (𝐹 ∘f + ((ℝ × {-1}) ∘f · 𝐺)) ∈ dom ∫1) |
17 | 10, 16 | eqeltrrd 2839 | 1 ⊢ ((𝐹 ∈ dom ∫1 ∧ 𝐺 ∈ dom ∫1) → (𝐹 ∘f − 𝐺) ∈ dom ∫1) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 399 = wceq 1543 ∈ wcel 2110 Vcvv 3408 ⊆ wss 3866 {csn 4541 × cxp 5549 dom cdm 5551 ⟶wf 6376 (class class class)co 7213 ∘f cof 7467 ℂcc 10727 ℝcr 10728 1c1 10730 + caddc 10732 · cmul 10734 − cmin 11062 -cneg 11063 ∫1citg1 24512 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1803 ax-4 1817 ax-5 1918 ax-6 1976 ax-7 2016 ax-8 2112 ax-9 2120 ax-10 2141 ax-11 2158 ax-12 2175 ax-ext 2708 ax-rep 5179 ax-sep 5192 ax-nul 5199 ax-pow 5258 ax-pr 5322 ax-un 7523 ax-inf2 9256 ax-cnex 10785 ax-resscn 10786 ax-1cn 10787 ax-icn 10788 ax-addcl 10789 ax-addrcl 10790 ax-mulcl 10791 ax-mulrcl 10792 ax-mulcom 10793 ax-addass 10794 ax-mulass 10795 ax-distr 10796 ax-i2m1 10797 ax-1ne0 10798 ax-1rid 10799 ax-rnegex 10800 ax-rrecex 10801 ax-cnre 10802 ax-pre-lttri 10803 ax-pre-lttrn 10804 ax-pre-ltadd 10805 ax-pre-mulgt0 10806 ax-pre-sup 10807 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 848 df-3or 1090 df-3an 1091 df-tru 1546 df-fal 1556 df-ex 1788 df-nf 1792 df-sb 2071 df-mo 2539 df-eu 2568 df-clab 2715 df-cleq 2729 df-clel 2816 df-nfc 2886 df-ne 2941 df-nel 3047 df-ral 3066 df-rex 3067 df-reu 3068 df-rmo 3069 df-rab 3070 df-v 3410 df-sbc 3695 df-csb 3812 df-dif 3869 df-un 3871 df-in 3873 df-ss 3883 df-pss 3885 df-nul 4238 df-if 4440 df-pw 4515 df-sn 4542 df-pr 4544 df-tp 4546 df-op 4548 df-uni 4820 df-int 4860 df-iun 4906 df-br 5054 df-opab 5116 df-mpt 5136 df-tr 5162 df-id 5455 df-eprel 5460 df-po 5468 df-so 5469 df-fr 5509 df-se 5510 df-we 5511 df-xp 5557 df-rel 5558 df-cnv 5559 df-co 5560 df-dm 5561 df-rn 5562 df-res 5563 df-ima 5564 df-pred 6160 df-ord 6216 df-on 6217 df-lim 6218 df-suc 6219 df-iota 6338 df-fun 6382 df-fn 6383 df-f 6384 df-f1 6385 df-fo 6386 df-f1o 6387 df-fv 6388 df-isom 6389 df-riota 7170 df-ov 7216 df-oprab 7217 df-mpo 7218 df-of 7469 df-om 7645 df-1st 7761 df-2nd 7762 df-wrecs 8047 df-recs 8108 df-rdg 8146 df-1o 8202 df-2o 8203 df-er 8391 df-map 8510 df-pm 8511 df-en 8627 df-dom 8628 df-sdom 8629 df-fin 8630 df-sup 9058 df-inf 9059 df-oi 9126 df-dju 9517 df-card 9555 df-pnf 10869 df-mnf 10870 df-xr 10871 df-ltxr 10872 df-le 10873 df-sub 11064 df-neg 11065 df-div 11490 df-nn 11831 df-2 11893 df-3 11894 df-n0 12091 df-z 12177 df-uz 12439 df-q 12545 df-rp 12587 df-xadd 12705 df-ioo 12939 df-ico 12941 df-icc 12942 df-fz 13096 df-fzo 13239 df-fl 13367 df-seq 13575 df-exp 13636 df-hash 13897 df-cj 14662 df-re 14663 df-im 14664 df-sqrt 14798 df-abs 14799 df-clim 15049 df-sum 15250 df-xmet 20356 df-met 20357 df-ovol 24361 df-vol 24362 df-mbf 24516 df-itg1 24517 |
This theorem is referenced by: itg1lea 24610 mbfi1flimlem 24620 itg2addnclem 35565 itg2addnclem3 35567 |
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