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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 25874 | . . . . 5 ⊢ 𝐹:ran (,)⟶( ≤ ∩ (ℝ* × ℝ*)) |
| 3 | 2 | ffvelcdmi 7075 | . . . 4 ⊢ (𝐴 ∈ ran (,) → (𝐹‘𝐴) ∈ ( ≤ ∩ (ℝ* × ℝ*))) |
| 4 | 3 | adantr 486 | . . 3 ⊢ ((𝐴 ∈ ran (,) ∧ (vol*‘𝐴) ∈ ℝ) → (𝐹‘𝐴) ∈ ( ≤ ∩ (ℝ* × ℝ*))) |
| 5 | 4 | elin1d 4150 | . 2 ⊢ ((𝐴 ∈ ran (,) ∧ (vol*‘𝐴) ∈ ℝ) → (𝐹‘𝐴) ∈ ≤ ) |
| 6 | 1 | ioorval 25875 | . . . . . 6 ⊢ (𝐴 ∈ ran (,) → (𝐹‘𝐴) = if(𝐴 = ∅, 〈0, 0〉, 〈inf(𝐴, ℝ*, < ), sup(𝐴, ℝ*, < )〉)) |
| 7 | 6 | adantr 486 | . . . . 5 ⊢ ((𝐴 ∈ ran (,) ∧ (vol*‘𝐴) ∈ ℝ) → (𝐹‘𝐴) = if(𝐴 = ∅, 〈0, 0〉, 〈inf(𝐴, ℝ*, < ), sup(𝐴, ℝ*, < )〉)) |
| 8 | iftrue 4488 | . . . . 5 ⊢ (𝐴 = ∅ → if(𝐴 = ∅, 〈0, 0〉, 〈inf(𝐴, ℝ*, < ), sup(𝐴, ℝ*, < )〉) = 〈0, 0〉) | |
| 9 | 7, 8 | sylan9eq 2816 | . . . 4 ⊢ (((𝐴 ∈ ran (,) ∧ (vol*‘𝐴) ∈ ℝ) ∧ 𝐴 = ∅) → (𝐹‘𝐴) = 〈0, 0〉) |
| 10 | 0re 11291 | . . . . 5 ⊢ 0 ∈ ℝ | |
| 11 | opelxpi 5688 | . . . . 5 ⊢ ((0 ∈ ℝ ∧ 0 ∈ ℝ) → 〈0, 0〉 ∈ (ℝ × ℝ)) | |
| 12 | 10, 10, 11 | mp2an 705 | . . . 4 ⊢ 〈0, 0〉 ∈ (ℝ × ℝ) |
| 13 | 9, 12 | eqeltrdi 2869 | . . 3 ⊢ (((𝐴 ∈ ran (,) ∧ (vol*‘𝐴) ∈ ℝ) ∧ 𝐴 = ∅) → (𝐹‘𝐴) ∈ (ℝ × ℝ)) |
| 14 | ioof 13559 | . . . . . 6 ⊢ (,):(ℝ* × ℝ*)⟶𝒫 ℝ | |
| 15 | ffn 6701 | . . . . . 6 ⊢ ((,):(ℝ* × ℝ*)⟶𝒫 ℝ → (,) Fn (ℝ* × ℝ*)) | |
| 16 | ovelrn 7589 | . . . . . 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 25876 | . . . . . . . . . 10 ⊢ ((𝑎(,)𝑏) ≠ ∅ → (𝐹‘(𝑎(,)𝑏)) = 〈𝑎, 𝑏〉) |
| 19 | 18 | adantl 487 | . . . . . . . . 9 ⊢ (((vol*‘(𝑎(,)𝑏)) ∈ ℝ ∧ (𝑎(,)𝑏) ≠ ∅) → (𝐹‘(𝑎(,)𝑏)) = 〈𝑎, 𝑏〉) |
| 20 | ioorcl2 25873 | . . . . . . . . . . 11 ⊢ (((𝑎(,)𝑏) ≠ ∅ ∧ (vol*‘(𝑎(,)𝑏)) ∈ ℝ) → (𝑎 ∈ ℝ ∧ 𝑏 ∈ ℝ)) | |
| 21 | 20 | ancoms 464 | . . . . . . . . . 10 ⊢ (((vol*‘(𝑎(,)𝑏)) ∈ ℝ ∧ (𝑎(,)𝑏) ≠ ∅) → (𝑎 ∈ ℝ ∧ 𝑏 ∈ ℝ)) |
| 22 | opelxpi 5688 | . . . . . . . . . 10 ⊢ ((𝑎 ∈ ℝ ∧ 𝑏 ∈ ℝ) → 〈𝑎, 𝑏〉 ∈ (ℝ × ℝ)) | |
| 23 | 21, 22 | syl 18 | . . . . . . . . 9 ⊢ (((vol*‘(𝑎(,)𝑏)) ∈ ℝ ∧ (𝑎(,)𝑏) ≠ ∅) → 〈𝑎, 𝑏〉 ∈ (ℝ × ℝ)) |
| 24 | 19, 23 | eqeltrd 2861 | . . . . . . . 8 ⊢ (((vol*‘(𝑎(,)𝑏)) ∈ ℝ ∧ (𝑎(,)𝑏) ≠ ∅) → (𝐹‘(𝑎(,)𝑏)) ∈ (ℝ × ℝ)) |
| 25 | fveq2 6877 | . . . . . . . . . . 11 ⊢ (𝐴 = (𝑎(,)𝑏) → (vol*‘𝐴) = (vol*‘(𝑎(,)𝑏))) | |
| 26 | 25 | eleq1d 2846 | . . . . . . . . . 10 ⊢ (𝐴 = (𝑎(,)𝑏) → ((vol*‘𝐴) ∈ ℝ ↔ (vol*‘(𝑎(,)𝑏)) ∈ ℝ)) |
| 27 | neeq1 3018 | . . . . . . . . . 10 ⊢ (𝐴 = (𝑎(,)𝑏) → (𝐴 ≠ ∅ ↔ (𝑎(,)𝑏) ≠ ∅)) | |
| 28 | 26, 27 | anbi12d 644 | . . . . . . . . 9 ⊢ (𝐴 = (𝑎(,)𝑏) → (((vol*‘𝐴) ∈ ℝ ∧ 𝐴 ≠ ∅) ↔ ((vol*‘(𝑎(,)𝑏)) ∈ ℝ ∧ (𝑎(,)𝑏) ≠ ∅))) |
| 29 | fveq2 6877 | . . . . . . . . . 10 ⊢ (𝐴 = (𝑎(,)𝑏) → (𝐹‘𝐴) = (𝐹‘(𝑎(,)𝑏))) | |
| 30 | 29 | eleq1d 2846 | . . . . . . . . 9 ⊢ (𝐴 = (𝑎(,)𝑏) → ((𝐹‘𝐴) ∈ (ℝ × ℝ) ↔ (𝐹‘(𝑎(,)𝑏)) ∈ (ℝ × ℝ))) |
| 31 | 28, 30 | imbi12d 347 | . . . . . . . 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 261 | . . . . . . 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 3205 | . . . . 5 ⊢ (∃𝑎 ∈ ℝ* ∃𝑏 ∈ ℝ* 𝐴 = (𝑎(,)𝑏) → (((vol*‘𝐴) ∈ ℝ ∧ 𝐴 ≠ ∅) → (𝐹‘𝐴) ∈ (ℝ × ℝ))) |
| 35 | 17, 34 | sylbi 220 | . . . 4 ⊢ (𝐴 ∈ ran (,) → (((vol*‘𝐴) ∈ ℝ ∧ 𝐴 ≠ ∅) → (𝐹‘𝐴) ∈ (ℝ × ℝ))) |
| 36 | 35 | impl 461 | . . 3 ⊢ (((𝐴 ∈ ran (,) ∧ (vol*‘𝐴) ∈ ℝ) ∧ 𝐴 ≠ ∅) → (𝐹‘𝐴) ∈ (ℝ × ℝ)) |
| 37 | 13, 36 | pm2.61dane 3043 | . 2 ⊢ ((𝐴 ∈ ran (,) ∧ (vol*‘𝐴) ∈ ℝ) → (𝐹‘𝐴) ∈ (ℝ × ℝ)) |
| 38 | 5, 37 | elind 4146 | 1 ⊢ ((𝐴 ∈ ran (,) ∧ (vol*‘𝐴) ∈ ℝ) → (𝐹‘𝐴) ∈ ( ≤ ∩ (ℝ × ℝ))) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 ∧ wa 401 = wceq 1570 ∈ wcel 2145 ≠ wne 2956 ∃wrex 3087 ∩ cin 3898 ∅c0 4279 ifcif 4482 𝒫 cpw 4557 〈cop 4590 ↦ cmpt 5186 × cxp 5649 ran crn 5652 Fn wfn 6526 ⟶wf 6527 ‘cfv 6531 (class class class)co 7412 supcsup 9416 infcinf 9417 ℝcr 11180 0cc0 11181 ℝ*cxr 11323 < clt 11324 ≤ cle 11325 (,)cioo 13457 vol*covol 25763 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2733 ax-rep 5232 ax-sep 5249 ax-nul 5260 ax-pow 5327 ax-pr 5391 ax-un 7740 ax-inf2 9626 ax-cnex 11237 ax-resscn 11238 ax-1cn 11239 ax-icn 11240 ax-addcl 11241 ax-addrcl 11242 ax-mulcl 11243 ax-mulrcl 11244 ax-mulcom 11245 ax-addass 11246 ax-mulass 11247 ax-distr 11248 ax-i2m1 11249 ax-1ne0 11250 ax-1rid 11251 ax-rnegex 11252 ax-rrecex 11253 ax-cnre 11254 ax-pre-lttri 11255 ax-pre-lttrn 11256 ax-pre-ltadd 11257 ax-pre-mulgt0 11258 ax-pre-sup 11259 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-nel 3063 df-ral 3078 df-rex 3088 df-rmo 3366 df-reu 3367 df-rab 3414 df-v 3453 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-int 4908 df-iun 4953 df-br 5104 df-opab 5168 df-mpt 5187 df-tr 5213 df-id 5546 df-eprel 5551 df-po 5559 df-so 5560 df-fr 5604 df-se 5605 df-we 5606 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 df-pred 6297 df-ord 6358 df-on 6359 df-lim 6360 df-suc 6361 df-iota 6487 df-fun 6533 df-fn 6534 df-f 6535 df-f1 6536 df-fo 6537 df-f1o 6538 df-fv 6539 df-isom 6540 df-riota 7369 df-ov 7415 df-oprab 7416 df-mpo 7417 df-of 7682 df-om 7867 df-1st 7990 df-2nd 7991 df-frecs 8283 df-wrecs 8314 df-recs 8363 df-rdg 8402 df-1o 8460 df-2o 8461 df-er 8701 df-map 8833 df-pm 8834 df-en 8958 df-dom 8959 df-sdom 8960 df-fin 8961 df-fi 9387 df-sup 9418 df-inf 9419 df-oi 9488 df-dju 9963 df-card 10001 df-pnf 11326 df-mnf 11327 df-xr 11328 df-ltxr 11329 df-le 11330 df-sub 11524 df-neg 11525 df-div 11955 df-nn 12317 df-2 12386 df-3 12387 df-n0 12588 df-z 12675 df-uz 12947 df-q 13057 df-rp 13102 df-xneg 13222 df-xadd 13223 df-xmul 13224 df-ioo 13461 df-ico 13463 df-icc 13464 df-fz 13621 df-fzo 13769 df-fl 13912 df-seq 14125 df-exp 14185 df-hash 14455 df-cj 15246 df-re 15247 df-im 15248 df-sqrt 15382 df-abs 15383 df-clim 15635 df-rlim 15636 df-sum 15834 df-rest 17573 df-topgen 17594 df-psmet 21650 df-xmet 21651 df-met 21652 df-bl 21653 df-mopn 21654 df-top 23192 df-topon 23209 df-bases 23244 df-cmp 23685 df-ovol 25765 df-vol 25766 |
| This theorem is used by: uniioombllem2 25884 |
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