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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 | inss1 3833 | . . 3 ⊢ ( ≤ ∩ (ℝ* × ℝ*)) ⊆ ≤ | |
2 | ioorf.1 | . . . . . 6 ⊢ 𝐹 = (𝑥 ∈ ran (,) ↦ if(𝑥 = ∅, 〈0, 0〉, 〈inf(𝑥, ℝ*, < ), sup(𝑥, ℝ*, < )〉)) | |
3 | 2 | ioorf 23341 | . . . . 5 ⊢ 𝐹:ran (,)⟶( ≤ ∩ (ℝ* × ℝ*)) |
4 | 3 | ffvelrni 6358 | . . . 4 ⊢ (𝐴 ∈ ran (,) → (𝐹‘𝐴) ∈ ( ≤ ∩ (ℝ* × ℝ*))) |
5 | 4 | adantr 481 | . . 3 ⊢ ((𝐴 ∈ ran (,) ∧ (vol*‘𝐴) ∈ ℝ) → (𝐹‘𝐴) ∈ ( ≤ ∩ (ℝ* × ℝ*))) |
6 | 1, 5 | sseldi 3601 | . 2 ⊢ ((𝐴 ∈ ran (,) ∧ (vol*‘𝐴) ∈ ℝ) → (𝐹‘𝐴) ∈ ≤ ) |
7 | 2 | ioorval 23342 | . . . . . 6 ⊢ (𝐴 ∈ ran (,) → (𝐹‘𝐴) = if(𝐴 = ∅, 〈0, 0〉, 〈inf(𝐴, ℝ*, < ), sup(𝐴, ℝ*, < )〉)) |
8 | 7 | adantr 481 | . . . . 5 ⊢ ((𝐴 ∈ ran (,) ∧ (vol*‘𝐴) ∈ ℝ) → (𝐹‘𝐴) = if(𝐴 = ∅, 〈0, 0〉, 〈inf(𝐴, ℝ*, < ), sup(𝐴, ℝ*, < )〉)) |
9 | iftrue 4092 | . . . . 5 ⊢ (𝐴 = ∅ → if(𝐴 = ∅, 〈0, 0〉, 〈inf(𝐴, ℝ*, < ), sup(𝐴, ℝ*, < )〉) = 〈0, 0〉) | |
10 | 8, 9 | sylan9eq 2676 | . . . 4 ⊢ (((𝐴 ∈ ran (,) ∧ (vol*‘𝐴) ∈ ℝ) ∧ 𝐴 = ∅) → (𝐹‘𝐴) = 〈0, 0〉) |
11 | 0re 10040 | . . . . 5 ⊢ 0 ∈ ℝ | |
12 | opelxpi 5148 | . . . . 5 ⊢ ((0 ∈ ℝ ∧ 0 ∈ ℝ) → 〈0, 0〉 ∈ (ℝ × ℝ)) | |
13 | 11, 11, 12 | mp2an 708 | . . . 4 ⊢ 〈0, 0〉 ∈ (ℝ × ℝ) |
14 | 10, 13 | syl6eqel 2709 | . . 3 ⊢ (((𝐴 ∈ ran (,) ∧ (vol*‘𝐴) ∈ ℝ) ∧ 𝐴 = ∅) → (𝐹‘𝐴) ∈ (ℝ × ℝ)) |
15 | ioof 12271 | . . . . . 6 ⊢ (,):(ℝ* × ℝ*)⟶𝒫 ℝ | |
16 | ffn 6045 | . . . . . 6 ⊢ ((,):(ℝ* × ℝ*)⟶𝒫 ℝ → (,) Fn (ℝ* × ℝ*)) | |
17 | ovelrn 6810 | . . . . . 6 ⊢ ((,) Fn (ℝ* × ℝ*) → (𝐴 ∈ ran (,) ↔ ∃𝑎 ∈ ℝ* ∃𝑏 ∈ ℝ* 𝐴 = (𝑎(,)𝑏))) | |
18 | 15, 16, 17 | mp2b 10 | . . . . 5 ⊢ (𝐴 ∈ ran (,) ↔ ∃𝑎 ∈ ℝ* ∃𝑏 ∈ ℝ* 𝐴 = (𝑎(,)𝑏)) |
19 | 2 | ioorinv2 23343 | . . . . . . . . . 10 ⊢ ((𝑎(,)𝑏) ≠ ∅ → (𝐹‘(𝑎(,)𝑏)) = 〈𝑎, 𝑏〉) |
20 | 19 | adantl 482 | . . . . . . . . 9 ⊢ (((vol*‘(𝑎(,)𝑏)) ∈ ℝ ∧ (𝑎(,)𝑏) ≠ ∅) → (𝐹‘(𝑎(,)𝑏)) = 〈𝑎, 𝑏〉) |
21 | ioorcl2 23340 | . . . . . . . . . . 11 ⊢ (((𝑎(,)𝑏) ≠ ∅ ∧ (vol*‘(𝑎(,)𝑏)) ∈ ℝ) → (𝑎 ∈ ℝ ∧ 𝑏 ∈ ℝ)) | |
22 | 21 | ancoms 469 | . . . . . . . . . 10 ⊢ (((vol*‘(𝑎(,)𝑏)) ∈ ℝ ∧ (𝑎(,)𝑏) ≠ ∅) → (𝑎 ∈ ℝ ∧ 𝑏 ∈ ℝ)) |
23 | opelxpi 5148 | . . . . . . . . . 10 ⊢ ((𝑎 ∈ ℝ ∧ 𝑏 ∈ ℝ) → 〈𝑎, 𝑏〉 ∈ (ℝ × ℝ)) | |
24 | 22, 23 | syl 17 | . . . . . . . . 9 ⊢ (((vol*‘(𝑎(,)𝑏)) ∈ ℝ ∧ (𝑎(,)𝑏) ≠ ∅) → 〈𝑎, 𝑏〉 ∈ (ℝ × ℝ)) |
25 | 20, 24 | eqeltrd 2701 | . . . . . . . 8 ⊢ (((vol*‘(𝑎(,)𝑏)) ∈ ℝ ∧ (𝑎(,)𝑏) ≠ ∅) → (𝐹‘(𝑎(,)𝑏)) ∈ (ℝ × ℝ)) |
26 | fveq2 6191 | . . . . . . . . . . 11 ⊢ (𝐴 = (𝑎(,)𝑏) → (vol*‘𝐴) = (vol*‘(𝑎(,)𝑏))) | |
27 | 26 | eleq1d 2686 | . . . . . . . . . 10 ⊢ (𝐴 = (𝑎(,)𝑏) → ((vol*‘𝐴) ∈ ℝ ↔ (vol*‘(𝑎(,)𝑏)) ∈ ℝ)) |
28 | neeq1 2856 | . . . . . . . . . 10 ⊢ (𝐴 = (𝑎(,)𝑏) → (𝐴 ≠ ∅ ↔ (𝑎(,)𝑏) ≠ ∅)) | |
29 | 27, 28 | anbi12d 747 | . . . . . . . . 9 ⊢ (𝐴 = (𝑎(,)𝑏) → (((vol*‘𝐴) ∈ ℝ ∧ 𝐴 ≠ ∅) ↔ ((vol*‘(𝑎(,)𝑏)) ∈ ℝ ∧ (𝑎(,)𝑏) ≠ ∅))) |
30 | fveq2 6191 | . . . . . . . . . 10 ⊢ (𝐴 = (𝑎(,)𝑏) → (𝐹‘𝐴) = (𝐹‘(𝑎(,)𝑏))) | |
31 | 30 | eleq1d 2686 | . . . . . . . . 9 ⊢ (𝐴 = (𝑎(,)𝑏) → ((𝐹‘𝐴) ∈ (ℝ × ℝ) ↔ (𝐹‘(𝑎(,)𝑏)) ∈ (ℝ × ℝ))) |
32 | 29, 31 | imbi12d 334 | . . . . . . . 8 ⊢ (𝐴 = (𝑎(,)𝑏) → ((((vol*‘𝐴) ∈ ℝ ∧ 𝐴 ≠ ∅) → (𝐹‘𝐴) ∈ (ℝ × ℝ)) ↔ (((vol*‘(𝑎(,)𝑏)) ∈ ℝ ∧ (𝑎(,)𝑏) ≠ ∅) → (𝐹‘(𝑎(,)𝑏)) ∈ (ℝ × ℝ)))) |
33 | 25, 32 | mpbiri 248 | . . . . . . 7 ⊢ (𝐴 = (𝑎(,)𝑏) → (((vol*‘𝐴) ∈ ℝ ∧ 𝐴 ≠ ∅) → (𝐹‘𝐴) ∈ (ℝ × ℝ))) |
34 | 33 | a1i 11 | . . . . . 6 ⊢ ((𝑎 ∈ ℝ* ∧ 𝑏 ∈ ℝ*) → (𝐴 = (𝑎(,)𝑏) → (((vol*‘𝐴) ∈ ℝ ∧ 𝐴 ≠ ∅) → (𝐹‘𝐴) ∈ (ℝ × ℝ)))) |
35 | 34 | rexlimivv 3036 | . . . . 5 ⊢ (∃𝑎 ∈ ℝ* ∃𝑏 ∈ ℝ* 𝐴 = (𝑎(,)𝑏) → (((vol*‘𝐴) ∈ ℝ ∧ 𝐴 ≠ ∅) → (𝐹‘𝐴) ∈ (ℝ × ℝ))) |
36 | 18, 35 | sylbi 207 | . . . 4 ⊢ (𝐴 ∈ ran (,) → (((vol*‘𝐴) ∈ ℝ ∧ 𝐴 ≠ ∅) → (𝐹‘𝐴) ∈ (ℝ × ℝ))) |
37 | 36 | impl 650 | . . 3 ⊢ (((𝐴 ∈ ran (,) ∧ (vol*‘𝐴) ∈ ℝ) ∧ 𝐴 ≠ ∅) → (𝐹‘𝐴) ∈ (ℝ × ℝ)) |
38 | 14, 37 | pm2.61dane 2881 | . 2 ⊢ ((𝐴 ∈ ran (,) ∧ (vol*‘𝐴) ∈ ℝ) → (𝐹‘𝐴) ∈ (ℝ × ℝ)) |
39 | 6, 38 | elind 3798 | 1 ⊢ ((𝐴 ∈ ran (,) ∧ (vol*‘𝐴) ∈ ℝ) → (𝐹‘𝐴) ∈ ( ≤ ∩ (ℝ × ℝ))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 196 ∧ wa 384 = wceq 1483 ∈ wcel 1990 ≠ wne 2794 ∃wrex 2913 ∩ cin 3573 ∅c0 3915 ifcif 4086 𝒫 cpw 4158 〈cop 4183 ↦ cmpt 4729 × cxp 5112 ran crn 5115 Fn wfn 5883 ⟶wf 5884 ‘cfv 5888 (class class class)co 6650 supcsup 8346 infcinf 8347 ℝcr 9935 0cc0 9936 ℝ*cxr 10073 < clt 10074 ≤ cle 10075 (,)cioo 12175 vol*covol 23231 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1722 ax-4 1737 ax-5 1839 ax-6 1888 ax-7 1935 ax-8 1992 ax-9 1999 ax-10 2019 ax-11 2034 ax-12 2047 ax-13 2246 ax-ext 2602 ax-rep 4771 ax-sep 4781 ax-nul 4789 ax-pow 4843 ax-pr 4906 ax-un 6949 ax-inf2 8538 ax-cnex 9992 ax-resscn 9993 ax-1cn 9994 ax-icn 9995 ax-addcl 9996 ax-addrcl 9997 ax-mulcl 9998 ax-mulrcl 9999 ax-mulcom 10000 ax-addass 10001 ax-mulass 10002 ax-distr 10003 ax-i2m1 10004 ax-1ne0 10005 ax-1rid 10006 ax-rnegex 10007 ax-rrecex 10008 ax-cnre 10009 ax-pre-lttri 10010 ax-pre-lttrn 10011 ax-pre-ltadd 10012 ax-pre-mulgt0 10013 ax-pre-sup 10014 |
This theorem depends on definitions: df-bi 197 df-or 385 df-an 386 df-3or 1038 df-3an 1039 df-tru 1486 df-fal 1489 df-ex 1705 df-nf 1710 df-sb 1881 df-eu 2474 df-mo 2475 df-clab 2609 df-cleq 2615 df-clel 2618 df-nfc 2753 df-ne 2795 df-nel 2898 df-ral 2917 df-rex 2918 df-reu 2919 df-rmo 2920 df-rab 2921 df-v 3202 df-sbc 3436 df-csb 3534 df-dif 3577 df-un 3579 df-in 3581 df-ss 3588 df-pss 3590 df-nul 3916 df-if 4087 df-pw 4160 df-sn 4178 df-pr 4180 df-tp 4182 df-op 4184 df-uni 4437 df-int 4476 df-iun 4522 df-br 4654 df-opab 4713 df-mpt 4730 df-tr 4753 df-id 5024 df-eprel 5029 df-po 5035 df-so 5036 df-fr 5073 df-se 5074 df-we 5075 df-xp 5120 df-rel 5121 df-cnv 5122 df-co 5123 df-dm 5124 df-rn 5125 df-res 5126 df-ima 5127 df-pred 5680 df-ord 5726 df-on 5727 df-lim 5728 df-suc 5729 df-iota 5851 df-fun 5890 df-fn 5891 df-f 5892 df-f1 5893 df-fo 5894 df-f1o 5895 df-fv 5896 df-isom 5897 df-riota 6611 df-ov 6653 df-oprab 6654 df-mpt2 6655 df-of 6897 df-om 7066 df-1st 7168 df-2nd 7169 df-wrecs 7407 df-recs 7468 df-rdg 7506 df-1o 7560 df-2o 7561 df-oadd 7564 df-er 7742 df-map 7859 df-pm 7860 df-en 7956 df-dom 7957 df-sdom 7958 df-fin 7959 df-fi 8317 df-sup 8348 df-inf 8349 df-oi 8415 df-card 8765 df-cda 8990 df-pnf 10076 df-mnf 10077 df-xr 10078 df-ltxr 10079 df-le 10080 df-sub 10268 df-neg 10269 df-div 10685 df-nn 11021 df-2 11079 df-3 11080 df-n0 11293 df-z 11378 df-uz 11688 df-q 11789 df-rp 11833 df-xneg 11946 df-xadd 11947 df-xmul 11948 df-ioo 12179 df-ico 12181 df-icc 12182 df-fz 12327 df-fzo 12466 df-fl 12593 df-seq 12802 df-exp 12861 df-hash 13118 df-cj 13839 df-re 13840 df-im 13841 df-sqrt 13975 df-abs 13976 df-clim 14219 df-rlim 14220 df-sum 14417 df-rest 16083 df-topgen 16104 df-psmet 19738 df-xmet 19739 df-met 19740 df-bl 19741 df-mopn 19742 df-top 20699 df-topon 20716 df-bases 20750 df-cmp 21190 df-ovol 23233 df-vol 23234 |
This theorem is referenced by: uniioombllem2 23351 |
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