| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| 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 25769 | . . . . 5 ⊢ 𝐹:ran (,)⟶( ≤ ∩ (ℝ* × ℝ*)) |
| 3 | 2 | ffvelcdmi 7085 | . . . 4 ⊢ (𝐴 ∈ ran (,) → (𝐹‘𝐴) ∈ ( ≤ ∩ (ℝ* × ℝ*))) |
| 4 | 3 | adantr 486 | . . 3 ⊢ ((𝐴 ∈ ran (,) ∧ (vol*‘𝐴) ∈ ℝ) → (𝐹‘𝐴) ∈ ( ≤ ∩ (ℝ* × ℝ*))) |
| 5 | 4 | elin1d 4160 | . 2 ⊢ ((𝐴 ∈ ran (,) ∧ (vol*‘𝐴) ∈ ℝ) → (𝐹‘𝐴) ∈ ≤ ) |
| 6 | 1 | ioorval 25770 | . . . . . 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 4498 | . . . . 5 ⊢ (𝐴 = ∅ → if(𝐴 = ∅, 〈0, 0〉, 〈inf(𝐴, ℝ*, < ), sup(𝐴, ℝ*, < )〉) = 〈0, 0〉) | |
| 9 | 7, 8 | sylan9eq 2821 | . . . 4 ⊢ (((𝐴 ∈ ran (,) ∧ (vol*‘𝐴) ∈ ℝ) ∧ 𝐴 = ∅) → (𝐹‘𝐴) = 〈0, 0〉) |
| 10 | 0re 11228 | . . . . 5 ⊢ 0 ∈ ℝ | |
| 11 | opelxpi 5703 | . . . . 5 ⊢ ((0 ∈ ℝ ∧ 0 ∈ ℝ) → 〈0, 0〉 ∈ (ℝ × ℝ)) | |
| 12 | 10, 10, 11 | mp2an 705 | . . . 4 ⊢ 〈0, 0〉 ∈ (ℝ × ℝ) |
| 13 | 9, 12 | eqeltrdi 2874 | . . 3 ⊢ (((𝐴 ∈ ran (,) ∧ (vol*‘𝐴) ∈ ℝ) ∧ 𝐴 = ∅) → (𝐹‘𝐴) ∈ (ℝ × ℝ)) |
| 14 | ioof 13492 | . . . . . 6 ⊢ (,):(ℝ* × ℝ*)⟶𝒫 ℝ | |
| 15 | ffn 6712 | . . . . . 6 ⊢ ((,):(ℝ* × ℝ*)⟶𝒫 ℝ → (,) Fn (ℝ* × ℝ*)) | |
| 16 | ovelrn 7599 | . . . . . 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 25771 | . . . . . . . . . 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 25768 | . . . . . . . . . . 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 5703 | . . . . . . . . . 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 2866 | . . . . . . . 8 ⊢ (((vol*‘(𝑎(,)𝑏)) ∈ ℝ ∧ (𝑎(,)𝑏) ≠ ∅) → (𝐹‘(𝑎(,)𝑏)) ∈ (ℝ × ℝ)) |
| 25 | fveq2 6888 | . . . . . . . . . . 11 ⊢ (𝐴 = (𝑎(,)𝑏) → (vol*‘𝐴) = (vol*‘(𝑎(,)𝑏))) | |
| 26 | 25 | eleq1d 2851 | . . . . . . . . . 10 ⊢ (𝐴 = (𝑎(,)𝑏) → ((vol*‘𝐴) ∈ ℝ ↔ (vol*‘(𝑎(,)𝑏)) ∈ ℝ)) |
| 27 | neeq1 3023 | . . . . . . . . . 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 6888 | . . . . . . . . . 10 ⊢ (𝐴 = (𝑎(,)𝑏) → (𝐹‘𝐴) = (𝐹‘(𝑎(,)𝑏))) | |
| 30 | 29 | eleq1d 2851 | . . . . . . . . 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 3210 | . . . . 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 3048 | . 2 ⊢ ((𝐴 ∈ ran (,) ∧ (vol*‘𝐴) ∈ ℝ) → (𝐹‘𝐴) ∈ (ℝ × ℝ)) |
| 38 | 5, 37 | elind 4156 | 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 2146 ≠ wne 2961 ∃wrex 3092 ∩ cin 3907 ∅c0 4289 ifcif 4492 𝒫 cpw 4567 〈cop 4600 ↦ cmpt 5197 × cxp 5664 ran crn 5667 Fn wfn 6538 ⟶wf 6539 ‘cfv 6543 (class class class)co 7423 supcsup 9410 infcinf 9411 ℝcr 11117 0cc0 11118 ℝ*cxr 11260 < clt 11261 ≤ cle 11262 (,)cioo 13390 vol*covol 25658 |
| 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 2148 ax-9 2156 ax-10 2179 ax-11 2195 ax-12 2216 ax-ext 2738 ax-rep 5243 ax-sep 5262 ax-nul 5274 ax-pow 5341 ax-pr 5409 ax-un 7745 ax-inf2 9620 ax-cnex 11174 ax-resscn 11175 ax-1cn 11176 ax-icn 11177 ax-addcl 11178 ax-addrcl 11179 ax-mulcl 11180 ax-mulrcl 11181 ax-mulcom 11182 ax-addass 11183 ax-mulass 11184 ax-distr 11185 ax-i2m1 11186 ax-1ne0 11187 ax-1rid 11188 ax-rnegex 11189 ax-rrecex 11190 ax-cnre 11191 ax-pre-lttri 11192 ax-pre-lttrn 11193 ax-pre-ltadd 11194 ax-pre-mulgt0 11195 ax-pre-sup 11196 |
| 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 2570 df-eu 2600 df-clab 2745 df-cleq 2758 df-clel 2841 df-nfc 2915 df-ne 2962 df-nel 3068 df-ral 3083 df-rex 3093 df-rmo 3372 df-reu 3373 df-rab 3420 df-v 3460 df-sbc 3748 df-csb 3857 df-dif 3911 df-un 3913 df-in 3915 df-ss 3925 df-pss 3928 df-nul 4290 df-if 4493 df-pw 4569 df-sn 4595 df-pr 4597 df-op 4601 df-uni 4878 df-int 4918 df-iun 4963 df-br 5115 df-opab 5179 df-mpt 5198 df-tr 5224 df-id 5561 df-eprel 5566 df-po 5574 df-so 5575 df-fr 5619 df-se 5620 df-we 5621 df-xp 5672 df-rel 5673 df-cnv 5674 df-co 5675 df-dm 5676 df-rn 5677 df-res 5678 df-ima 5679 df-pred 6309 df-ord 6370 df-on 6371 df-lim 6372 df-suc 6373 df-iota 6499 df-fun 6545 df-fn 6546 df-f 6547 df-f1 6548 df-fo 6549 df-f1o 6550 df-fv 6551 df-isom 6552 df-riota 7380 df-ov 7426 df-oprab 7427 df-mpo 7428 df-of 7687 df-om 7872 df-1st 7995 df-2nd 7996 df-frecs 8287 df-wrecs 8318 df-recs 8367 df-rdg 8406 df-1o 8462 df-2o 8463 df-er 8703 df-map 8835 df-pm 8836 df-en 8953 df-dom 8954 df-sdom 8955 df-fin 8956 df-fi 9381 df-sup 9412 df-inf 9413 df-oi 9482 df-dju 9906 df-card 9944 df-pnf 11263 df-mnf 11264 df-xr 11265 df-ltxr 11266 df-le 11267 df-sub 11461 df-neg 11462 df-div 11890 df-nn 12252 df-2 12321 df-3 12322 df-n0 12523 df-z 12610 df-uz 12881 df-q 12991 df-rp 13035 df-xneg 13155 df-xadd 13156 df-xmul 13157 df-ioo 13394 df-ico 13396 df-icc 13397 df-fz 13554 df-fzo 13702 df-fl 13845 df-seq 14058 df-exp 14118 df-hash 14387 df-cj 15176 df-re 15177 df-im 15178 df-sqrt 15312 df-abs 15313 df-clim 15565 df-rlim 15566 df-sum 15764 df-rest 17500 df-topgen 17521 df-psmet 21551 df-xmet 21552 df-met 21553 df-bl 21554 df-mopn 21555 df-top 23088 df-topon 23105 df-bases 23140 df-cmp 23581 df-ovol 25660 df-vol 25661 |
| This theorem is used by: uniioombllem2 25779 |
| Copyright terms: Public domain | W3C validator |