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Mirrors > Home > MPE Home > Th. List > ioorcl | Structured version Visualization version GIF version |
Description: The function 𝐹 does not always return real numbers, but it does on intervals of finite volume. (Contributed by Mario Carneiro, 26-Mar-2015.) (Revised by AV, 13-Sep-2020.) |
Ref | Expression |
---|---|
ioorf.1 | ⊢ 𝐹 = (𝑥 ∈ ran (,) ↦ if(𝑥 = ∅, 〈0, 0〉, 〈inf(𝑥, ℝ*, < ), sup(𝑥, ℝ*, < )〉)) |
Ref | Expression |
---|---|
ioorcl | ⊢ ((𝐴 ∈ ran (,) ∧ (vol*‘𝐴) ∈ ℝ) → (𝐹‘𝐴) ∈ ( ≤ ∩ (ℝ × ℝ))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ioorf.1 | . . . . . 6 ⊢ 𝐹 = (𝑥 ∈ ran (,) ↦ if(𝑥 = ∅, 〈0, 0〉, 〈inf(𝑥, ℝ*, < ), sup(𝑥, ℝ*, < )〉)) | |
2 | 1 | ioorf 24642 | . . . . 5 ⊢ 𝐹:ran (,)⟶( ≤ ∩ (ℝ* × ℝ*)) |
3 | 2 | ffvelrni 6942 | . . . 4 ⊢ (𝐴 ∈ ran (,) → (𝐹‘𝐴) ∈ ( ≤ ∩ (ℝ* × ℝ*))) |
4 | 3 | adantr 480 | . . 3 ⊢ ((𝐴 ∈ ran (,) ∧ (vol*‘𝐴) ∈ ℝ) → (𝐹‘𝐴) ∈ ( ≤ ∩ (ℝ* × ℝ*))) |
5 | 4 | elin1d 4128 | . 2 ⊢ ((𝐴 ∈ ran (,) ∧ (vol*‘𝐴) ∈ ℝ) → (𝐹‘𝐴) ∈ ≤ ) |
6 | 1 | ioorval 24643 | . . . . . 6 ⊢ (𝐴 ∈ ran (,) → (𝐹‘𝐴) = if(𝐴 = ∅, 〈0, 0〉, 〈inf(𝐴, ℝ*, < ), sup(𝐴, ℝ*, < )〉)) |
7 | 6 | adantr 480 | . . . . 5 ⊢ ((𝐴 ∈ ran (,) ∧ (vol*‘𝐴) ∈ ℝ) → (𝐹‘𝐴) = if(𝐴 = ∅, 〈0, 0〉, 〈inf(𝐴, ℝ*, < ), sup(𝐴, ℝ*, < )〉)) |
8 | iftrue 4462 | . . . . 5 ⊢ (𝐴 = ∅ → if(𝐴 = ∅, 〈0, 0〉, 〈inf(𝐴, ℝ*, < ), sup(𝐴, ℝ*, < )〉) = 〈0, 0〉) | |
9 | 7, 8 | sylan9eq 2799 | . . . 4 ⊢ (((𝐴 ∈ ran (,) ∧ (vol*‘𝐴) ∈ ℝ) ∧ 𝐴 = ∅) → (𝐹‘𝐴) = 〈0, 0〉) |
10 | 0re 10908 | . . . . 5 ⊢ 0 ∈ ℝ | |
11 | opelxpi 5617 | . . . . 5 ⊢ ((0 ∈ ℝ ∧ 0 ∈ ℝ) → 〈0, 0〉 ∈ (ℝ × ℝ)) | |
12 | 10, 10, 11 | mp2an 688 | . . . 4 ⊢ 〈0, 0〉 ∈ (ℝ × ℝ) |
13 | 9, 12 | eqeltrdi 2847 | . . 3 ⊢ (((𝐴 ∈ ran (,) ∧ (vol*‘𝐴) ∈ ℝ) ∧ 𝐴 = ∅) → (𝐹‘𝐴) ∈ (ℝ × ℝ)) |
14 | ioof 13108 | . . . . . 6 ⊢ (,):(ℝ* × ℝ*)⟶𝒫 ℝ | |
15 | ffn 6584 | . . . . . 6 ⊢ ((,):(ℝ* × ℝ*)⟶𝒫 ℝ → (,) Fn (ℝ* × ℝ*)) | |
16 | ovelrn 7426 | . . . . . 6 ⊢ ((,) Fn (ℝ* × ℝ*) → (𝐴 ∈ ran (,) ↔ ∃𝑎 ∈ ℝ* ∃𝑏 ∈ ℝ* 𝐴 = (𝑎(,)𝑏))) | |
17 | 14, 15, 16 | mp2b 10 | . . . . 5 ⊢ (𝐴 ∈ ran (,) ↔ ∃𝑎 ∈ ℝ* ∃𝑏 ∈ ℝ* 𝐴 = (𝑎(,)𝑏)) |
18 | 1 | ioorinv2 24644 | . . . . . . . . . 10 ⊢ ((𝑎(,)𝑏) ≠ ∅ → (𝐹‘(𝑎(,)𝑏)) = 〈𝑎, 𝑏〉) |
19 | 18 | adantl 481 | . . . . . . . . 9 ⊢ (((vol*‘(𝑎(,)𝑏)) ∈ ℝ ∧ (𝑎(,)𝑏) ≠ ∅) → (𝐹‘(𝑎(,)𝑏)) = 〈𝑎, 𝑏〉) |
20 | ioorcl2 24641 | . . . . . . . . . . 11 ⊢ (((𝑎(,)𝑏) ≠ ∅ ∧ (vol*‘(𝑎(,)𝑏)) ∈ ℝ) → (𝑎 ∈ ℝ ∧ 𝑏 ∈ ℝ)) | |
21 | 20 | ancoms 458 | . . . . . . . . . 10 ⊢ (((vol*‘(𝑎(,)𝑏)) ∈ ℝ ∧ (𝑎(,)𝑏) ≠ ∅) → (𝑎 ∈ ℝ ∧ 𝑏 ∈ ℝ)) |
22 | opelxpi 5617 | . . . . . . . . . 10 ⊢ ((𝑎 ∈ ℝ ∧ 𝑏 ∈ ℝ) → 〈𝑎, 𝑏〉 ∈ (ℝ × ℝ)) | |
23 | 21, 22 | syl 17 | . . . . . . . . 9 ⊢ (((vol*‘(𝑎(,)𝑏)) ∈ ℝ ∧ (𝑎(,)𝑏) ≠ ∅) → 〈𝑎, 𝑏〉 ∈ (ℝ × ℝ)) |
24 | 19, 23 | eqeltrd 2839 | . . . . . . . 8 ⊢ (((vol*‘(𝑎(,)𝑏)) ∈ ℝ ∧ (𝑎(,)𝑏) ≠ ∅) → (𝐹‘(𝑎(,)𝑏)) ∈ (ℝ × ℝ)) |
25 | fveq2 6756 | . . . . . . . . . . 11 ⊢ (𝐴 = (𝑎(,)𝑏) → (vol*‘𝐴) = (vol*‘(𝑎(,)𝑏))) | |
26 | 25 | eleq1d 2823 | . . . . . . . . . 10 ⊢ (𝐴 = (𝑎(,)𝑏) → ((vol*‘𝐴) ∈ ℝ ↔ (vol*‘(𝑎(,)𝑏)) ∈ ℝ)) |
27 | neeq1 3005 | . . . . . . . . . 10 ⊢ (𝐴 = (𝑎(,)𝑏) → (𝐴 ≠ ∅ ↔ (𝑎(,)𝑏) ≠ ∅)) | |
28 | 26, 27 | anbi12d 630 | . . . . . . . . 9 ⊢ (𝐴 = (𝑎(,)𝑏) → (((vol*‘𝐴) ∈ ℝ ∧ 𝐴 ≠ ∅) ↔ ((vol*‘(𝑎(,)𝑏)) ∈ ℝ ∧ (𝑎(,)𝑏) ≠ ∅))) |
29 | fveq2 6756 | . . . . . . . . . 10 ⊢ (𝐴 = (𝑎(,)𝑏) → (𝐹‘𝐴) = (𝐹‘(𝑎(,)𝑏))) | |
30 | 29 | eleq1d 2823 | . . . . . . . . 9 ⊢ (𝐴 = (𝑎(,)𝑏) → ((𝐹‘𝐴) ∈ (ℝ × ℝ) ↔ (𝐹‘(𝑎(,)𝑏)) ∈ (ℝ × ℝ))) |
31 | 28, 30 | imbi12d 344 | . . . . . . . 8 ⊢ (𝐴 = (𝑎(,)𝑏) → ((((vol*‘𝐴) ∈ ℝ ∧ 𝐴 ≠ ∅) → (𝐹‘𝐴) ∈ (ℝ × ℝ)) ↔ (((vol*‘(𝑎(,)𝑏)) ∈ ℝ ∧ (𝑎(,)𝑏) ≠ ∅) → (𝐹‘(𝑎(,)𝑏)) ∈ (ℝ × ℝ)))) |
32 | 24, 31 | mpbiri 257 | . . . . . . 7 ⊢ (𝐴 = (𝑎(,)𝑏) → (((vol*‘𝐴) ∈ ℝ ∧ 𝐴 ≠ ∅) → (𝐹‘𝐴) ∈ (ℝ × ℝ))) |
33 | 32 | a1i 11 | . . . . . 6 ⊢ ((𝑎 ∈ ℝ* ∧ 𝑏 ∈ ℝ*) → (𝐴 = (𝑎(,)𝑏) → (((vol*‘𝐴) ∈ ℝ ∧ 𝐴 ≠ ∅) → (𝐹‘𝐴) ∈ (ℝ × ℝ)))) |
34 | 33 | rexlimivv 3220 | . . . . 5 ⊢ (∃𝑎 ∈ ℝ* ∃𝑏 ∈ ℝ* 𝐴 = (𝑎(,)𝑏) → (((vol*‘𝐴) ∈ ℝ ∧ 𝐴 ≠ ∅) → (𝐹‘𝐴) ∈ (ℝ × ℝ))) |
35 | 17, 34 | sylbi 216 | . . . 4 ⊢ (𝐴 ∈ ran (,) → (((vol*‘𝐴) ∈ ℝ ∧ 𝐴 ≠ ∅) → (𝐹‘𝐴) ∈ (ℝ × ℝ))) |
36 | 35 | impl 455 | . . 3 ⊢ (((𝐴 ∈ ran (,) ∧ (vol*‘𝐴) ∈ ℝ) ∧ 𝐴 ≠ ∅) → (𝐹‘𝐴) ∈ (ℝ × ℝ)) |
37 | 13, 36 | pm2.61dane 3031 | . 2 ⊢ ((𝐴 ∈ ran (,) ∧ (vol*‘𝐴) ∈ ℝ) → (𝐹‘𝐴) ∈ (ℝ × ℝ)) |
38 | 5, 37 | elind 4124 | 1 ⊢ ((𝐴 ∈ ran (,) ∧ (vol*‘𝐴) ∈ ℝ) → (𝐹‘𝐴) ∈ ( ≤ ∩ (ℝ × ℝ))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 205 ∧ wa 395 = wceq 1539 ∈ wcel 2108 ≠ wne 2942 ∃wrex 3064 ∩ cin 3882 ∅c0 4253 ifcif 4456 𝒫 cpw 4530 〈cop 4564 ↦ cmpt 5153 × cxp 5578 ran crn 5581 Fn wfn 6413 ⟶wf 6414 ‘cfv 6418 (class class class)co 7255 supcsup 9129 infcinf 9130 ℝcr 10801 0cc0 10802 ℝ*cxr 10939 < clt 10940 ≤ cle 10941 (,)cioo 13008 vol*covol 24531 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1799 ax-4 1813 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2110 ax-9 2118 ax-10 2139 ax-11 2156 ax-12 2173 ax-ext 2709 ax-rep 5205 ax-sep 5218 ax-nul 5225 ax-pow 5283 ax-pr 5347 ax-un 7566 ax-inf2 9329 ax-cnex 10858 ax-resscn 10859 ax-1cn 10860 ax-icn 10861 ax-addcl 10862 ax-addrcl 10863 ax-mulcl 10864 ax-mulrcl 10865 ax-mulcom 10866 ax-addass 10867 ax-mulass 10868 ax-distr 10869 ax-i2m1 10870 ax-1ne0 10871 ax-1rid 10872 ax-rnegex 10873 ax-rrecex 10874 ax-cnre 10875 ax-pre-lttri 10876 ax-pre-lttrn 10877 ax-pre-ltadd 10878 ax-pre-mulgt0 10879 ax-pre-sup 10880 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3or 1086 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1784 df-nf 1788 df-sb 2069 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2817 df-nfc 2888 df-ne 2943 df-nel 3049 df-ral 3068 df-rex 3069 df-reu 3070 df-rmo 3071 df-rab 3072 df-v 3424 df-sbc 3712 df-csb 3829 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-pss 3902 df-nul 4254 df-if 4457 df-pw 4532 df-sn 4559 df-pr 4561 df-tp 4563 df-op 4565 df-uni 4837 df-int 4877 df-iun 4923 df-br 5071 df-opab 5133 df-mpt 5154 df-tr 5188 df-id 5480 df-eprel 5486 df-po 5494 df-so 5495 df-fr 5535 df-se 5536 df-we 5537 df-xp 5586 df-rel 5587 df-cnv 5588 df-co 5589 df-dm 5590 df-rn 5591 df-res 5592 df-ima 5593 df-pred 6191 df-ord 6254 df-on 6255 df-lim 6256 df-suc 6257 df-iota 6376 df-fun 6420 df-fn 6421 df-f 6422 df-f1 6423 df-fo 6424 df-f1o 6425 df-fv 6426 df-isom 6427 df-riota 7212 df-ov 7258 df-oprab 7259 df-mpo 7260 df-of 7511 df-om 7688 df-1st 7804 df-2nd 7805 df-frecs 8068 df-wrecs 8099 df-recs 8173 df-rdg 8212 df-1o 8267 df-2o 8268 df-er 8456 df-map 8575 df-pm 8576 df-en 8692 df-dom 8693 df-sdom 8694 df-fin 8695 df-fi 9100 df-sup 9131 df-inf 9132 df-oi 9199 df-dju 9590 df-card 9628 df-pnf 10942 df-mnf 10943 df-xr 10944 df-ltxr 10945 df-le 10946 df-sub 11137 df-neg 11138 df-div 11563 df-nn 11904 df-2 11966 df-3 11967 df-n0 12164 df-z 12250 df-uz 12512 df-q 12618 df-rp 12660 df-xneg 12777 df-xadd 12778 df-xmul 12779 df-ioo 13012 df-ico 13014 df-icc 13015 df-fz 13169 df-fzo 13312 df-fl 13440 df-seq 13650 df-exp 13711 df-hash 13973 df-cj 14738 df-re 14739 df-im 14740 df-sqrt 14874 df-abs 14875 df-clim 15125 df-rlim 15126 df-sum 15326 df-rest 17050 df-topgen 17071 df-psmet 20502 df-xmet 20503 df-met 20504 df-bl 20505 df-mopn 20506 df-top 21951 df-topon 21968 df-bases 22004 df-cmp 22446 df-ovol 24533 df-vol 24534 |
This theorem is referenced by: uniioombllem2 24652 |
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