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Mirrors > Home > MPE Home > Th. List > i1f0rn | Structured version Visualization version GIF version |
Description: Any simple function takes the value zero on a set of unbounded measure, so in particular this set is not empty. (Contributed by Mario Carneiro, 18-Jun-2014.) |
Ref | Expression |
---|---|
i1f0rn | ⊢ (𝐹 ∈ dom ∫1 → 0 ∈ ran 𝐹) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | pnfnre 11299 | . . 3 ⊢ +∞ ∉ ℝ | |
2 | 1 | neli 3045 | . 2 ⊢ ¬ +∞ ∈ ℝ |
3 | rembl 25588 | . . . . . 6 ⊢ ℝ ∈ dom vol | |
4 | mblvol 25578 | . . . . . 6 ⊢ (ℝ ∈ dom vol → (vol‘ℝ) = (vol*‘ℝ)) | |
5 | 3, 4 | ax-mp 5 | . . . . 5 ⊢ (vol‘ℝ) = (vol*‘ℝ) |
6 | ovolre 25573 | . . . . 5 ⊢ (vol*‘ℝ) = +∞ | |
7 | 5, 6 | eqtri 2762 | . . . 4 ⊢ (vol‘ℝ) = +∞ |
8 | cnvimarndm 6102 | . . . . . . 7 ⊢ (◡𝐹 “ ran 𝐹) = dom 𝐹 | |
9 | i1ff 25724 | . . . . . . . . 9 ⊢ (𝐹 ∈ dom ∫1 → 𝐹:ℝ⟶ℝ) | |
10 | 9 | fdmd 6746 | . . . . . . . 8 ⊢ (𝐹 ∈ dom ∫1 → dom 𝐹 = ℝ) |
11 | 10 | adantr 480 | . . . . . . 7 ⊢ ((𝐹 ∈ dom ∫1 ∧ ¬ 0 ∈ ran 𝐹) → dom 𝐹 = ℝ) |
12 | 8, 11 | eqtrid 2786 | . . . . . 6 ⊢ ((𝐹 ∈ dom ∫1 ∧ ¬ 0 ∈ ran 𝐹) → (◡𝐹 “ ran 𝐹) = ℝ) |
13 | 12 | fveq2d 6910 | . . . . 5 ⊢ ((𝐹 ∈ dom ∫1 ∧ ¬ 0 ∈ ran 𝐹) → (vol‘(◡𝐹 “ ran 𝐹)) = (vol‘ℝ)) |
14 | i1fima2 25727 | . . . . 5 ⊢ ((𝐹 ∈ dom ∫1 ∧ ¬ 0 ∈ ran 𝐹) → (vol‘(◡𝐹 “ ran 𝐹)) ∈ ℝ) | |
15 | 13, 14 | eqeltrrd 2839 | . . . 4 ⊢ ((𝐹 ∈ dom ∫1 ∧ ¬ 0 ∈ ran 𝐹) → (vol‘ℝ) ∈ ℝ) |
16 | 7, 15 | eqeltrrid 2843 | . . 3 ⊢ ((𝐹 ∈ dom ∫1 ∧ ¬ 0 ∈ ran 𝐹) → +∞ ∈ ℝ) |
17 | 16 | ex 412 | . 2 ⊢ (𝐹 ∈ dom ∫1 → (¬ 0 ∈ ran 𝐹 → +∞ ∈ ℝ)) |
18 | 2, 17 | mt3i 149 | 1 ⊢ (𝐹 ∈ dom ∫1 → 0 ∈ ran 𝐹) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ∧ wa 395 = wceq 1536 ∈ wcel 2105 ◡ccnv 5687 dom cdm 5688 ran crn 5689 “ cima 5691 ‘cfv 6562 ℝcr 11151 0cc0 11152 +∞cpnf 11289 vol*covol 25510 volcvol 25511 ∫1citg1 25663 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1791 ax-4 1805 ax-5 1907 ax-6 1964 ax-7 2004 ax-8 2107 ax-9 2115 ax-10 2138 ax-11 2154 ax-12 2174 ax-ext 2705 ax-rep 5284 ax-sep 5301 ax-nul 5311 ax-pow 5370 ax-pr 5437 ax-un 7753 ax-inf2 9678 ax-cnex 11208 ax-resscn 11209 ax-1cn 11210 ax-icn 11211 ax-addcl 11212 ax-addrcl 11213 ax-mulcl 11214 ax-mulrcl 11215 ax-mulcom 11216 ax-addass 11217 ax-mulass 11218 ax-distr 11219 ax-i2m1 11220 ax-1ne0 11221 ax-1rid 11222 ax-rnegex 11223 ax-rrecex 11224 ax-cnre 11225 ax-pre-lttri 11226 ax-pre-lttrn 11227 ax-pre-ltadd 11228 ax-pre-mulgt0 11229 ax-pre-sup 11230 |
This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1539 df-fal 1549 df-ex 1776 df-nf 1780 df-sb 2062 df-mo 2537 df-eu 2566 df-clab 2712 df-cleq 2726 df-clel 2813 df-nfc 2889 df-ne 2938 df-nel 3044 df-ral 3059 df-rex 3068 df-rmo 3377 df-reu 3378 df-rab 3433 df-v 3479 df-sbc 3791 df-csb 3908 df-dif 3965 df-un 3967 df-in 3969 df-ss 3979 df-pss 3982 df-nul 4339 df-if 4531 df-pw 4606 df-sn 4631 df-pr 4633 df-op 4637 df-uni 4912 df-int 4951 df-iun 4997 df-br 5148 df-opab 5210 df-mpt 5231 df-tr 5265 df-id 5582 df-eprel 5588 df-po 5596 df-so 5597 df-fr 5640 df-se 5641 df-we 5642 df-xp 5694 df-rel 5695 df-cnv 5696 df-co 5697 df-dm 5698 df-rn 5699 df-res 5700 df-ima 5701 df-pred 6322 df-ord 6388 df-on 6389 df-lim 6390 df-suc 6391 df-iota 6515 df-fun 6564 df-fn 6565 df-f 6566 df-f1 6567 df-fo 6568 df-f1o 6569 df-fv 6570 df-isom 6571 df-riota 7387 df-ov 7433 df-oprab 7434 df-mpo 7435 df-of 7696 df-om 7887 df-1st 8012 df-2nd 8013 df-frecs 8304 df-wrecs 8335 df-recs 8409 df-rdg 8448 df-1o 8504 df-2o 8505 df-er 8743 df-map 8866 df-pm 8867 df-en 8984 df-dom 8985 df-sdom 8986 df-fin 8987 df-fi 9448 df-sup 9479 df-inf 9480 df-oi 9547 df-dju 9938 df-card 9976 df-pnf 11294 df-mnf 11295 df-xr 11296 df-ltxr 11297 df-le 11298 df-sub 11491 df-neg 11492 df-div 11918 df-nn 12264 df-2 12326 df-3 12327 df-n0 12524 df-z 12611 df-uz 12876 df-q 12988 df-rp 13032 df-xneg 13151 df-xadd 13152 df-xmul 13153 df-ioo 13387 df-ico 13389 df-icc 13390 df-fz 13544 df-fzo 13691 df-fl 13828 df-seq 14039 df-exp 14099 df-hash 14366 df-cj 15134 df-re 15135 df-im 15136 df-sqrt 15270 df-abs 15271 df-clim 15520 df-sum 15719 df-rest 17468 df-topgen 17489 df-psmet 21373 df-xmet 21374 df-met 21375 df-bl 21376 df-mopn 21377 df-top 22915 df-topon 22932 df-bases 22968 df-cmp 23410 df-ovol 25512 df-vol 25513 df-mbf 25667 df-itg1 25668 |
This theorem is referenced by: i1fres 25754 itg1climres 25763 itg2addnclem2 37658 ftc1anclem7 37685 ftc1anc 37687 |
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