Mathbox for Glauco Siliprandi |
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Mirrors > Home > MPE Home > Th. List > Mathboxes > hoiprodcl | Structured version Visualization version GIF version |
Description: The pre-measure of half-open intervals is a nonnegative real. (Contributed by Glauco Siliprandi, 11-Oct-2020.) |
Ref | Expression |
---|---|
hoiprodcl.1 | ⊢ Ⅎ𝑘𝜑 |
hoiprodcl.2 | ⊢ (𝜑 → 𝑋 ∈ Fin) |
hoiprodcl.3 | ⊢ (𝜑 → 𝐼:𝑋⟶(ℝ × ℝ)) |
Ref | Expression |
---|---|
hoiprodcl | ⊢ (𝜑 → ∏𝑘 ∈ 𝑋 (vol‘(([,) ∘ 𝐼)‘𝑘)) ∈ (0[,)+∞)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 0xr 11022 | . . 3 ⊢ 0 ∈ ℝ* | |
2 | 1 | a1i 11 | . 2 ⊢ (𝜑 → 0 ∈ ℝ*) |
3 | pnfxr 11029 | . . 3 ⊢ +∞ ∈ ℝ* | |
4 | 3 | a1i 11 | . 2 ⊢ (𝜑 → +∞ ∈ ℝ*) |
5 | hoiprodcl.1 | . . . 4 ⊢ Ⅎ𝑘𝜑 | |
6 | hoiprodcl.2 | . . . 4 ⊢ (𝜑 → 𝑋 ∈ Fin) | |
7 | hoiprodcl.3 | . . . . . . . . 9 ⊢ (𝜑 → 𝐼:𝑋⟶(ℝ × ℝ)) | |
8 | 7 | adantr 481 | . . . . . . . 8 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑋) → 𝐼:𝑋⟶(ℝ × ℝ)) |
9 | simpr 485 | . . . . . . . 8 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑋) → 𝑘 ∈ 𝑋) | |
10 | 8, 9 | fvovco 42732 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑋) → (([,) ∘ 𝐼)‘𝑘) = ((1st ‘(𝐼‘𝑘))[,)(2nd ‘(𝐼‘𝑘)))) |
11 | 10 | fveq2d 6778 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑋) → (vol‘(([,) ∘ 𝐼)‘𝑘)) = (vol‘((1st ‘(𝐼‘𝑘))[,)(2nd ‘(𝐼‘𝑘))))) |
12 | 7 | ffvelrnda 6961 | . . . . . . . 8 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑋) → (𝐼‘𝑘) ∈ (ℝ × ℝ)) |
13 | xp1st 7863 | . . . . . . . 8 ⊢ ((𝐼‘𝑘) ∈ (ℝ × ℝ) → (1st ‘(𝐼‘𝑘)) ∈ ℝ) | |
14 | 12, 13 | syl 17 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑋) → (1st ‘(𝐼‘𝑘)) ∈ ℝ) |
15 | xp2nd 7864 | . . . . . . . 8 ⊢ ((𝐼‘𝑘) ∈ (ℝ × ℝ) → (2nd ‘(𝐼‘𝑘)) ∈ ℝ) | |
16 | 12, 15 | syl 17 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑋) → (2nd ‘(𝐼‘𝑘)) ∈ ℝ) |
17 | volico 43524 | . . . . . . 7 ⊢ (((1st ‘(𝐼‘𝑘)) ∈ ℝ ∧ (2nd ‘(𝐼‘𝑘)) ∈ ℝ) → (vol‘((1st ‘(𝐼‘𝑘))[,)(2nd ‘(𝐼‘𝑘)))) = if((1st ‘(𝐼‘𝑘)) < (2nd ‘(𝐼‘𝑘)), ((2nd ‘(𝐼‘𝑘)) − (1st ‘(𝐼‘𝑘))), 0)) | |
18 | 14, 16, 17 | syl2anc 584 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑋) → (vol‘((1st ‘(𝐼‘𝑘))[,)(2nd ‘(𝐼‘𝑘)))) = if((1st ‘(𝐼‘𝑘)) < (2nd ‘(𝐼‘𝑘)), ((2nd ‘(𝐼‘𝑘)) − (1st ‘(𝐼‘𝑘))), 0)) |
19 | 11, 18 | eqtrd 2778 | . . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑋) → (vol‘(([,) ∘ 𝐼)‘𝑘)) = if((1st ‘(𝐼‘𝑘)) < (2nd ‘(𝐼‘𝑘)), ((2nd ‘(𝐼‘𝑘)) − (1st ‘(𝐼‘𝑘))), 0)) |
20 | 16, 14 | resubcld 11403 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑋) → ((2nd ‘(𝐼‘𝑘)) − (1st ‘(𝐼‘𝑘))) ∈ ℝ) |
21 | 0red 10978 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑋) → 0 ∈ ℝ) | |
22 | 20, 21 | ifcld 4505 | . . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑋) → if((1st ‘(𝐼‘𝑘)) < (2nd ‘(𝐼‘𝑘)), ((2nd ‘(𝐼‘𝑘)) − (1st ‘(𝐼‘𝑘))), 0) ∈ ℝ) |
23 | 19, 22 | eqeltrd 2839 | . . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑋) → (vol‘(([,) ∘ 𝐼)‘𝑘)) ∈ ℝ) |
24 | 5, 6, 23 | fprodreclf 15669 | . . 3 ⊢ (𝜑 → ∏𝑘 ∈ 𝑋 (vol‘(([,) ∘ 𝐼)‘𝑘)) ∈ ℝ) |
25 | 24 | rexrd 11025 | . 2 ⊢ (𝜑 → ∏𝑘 ∈ 𝑋 (vol‘(([,) ∘ 𝐼)‘𝑘)) ∈ ℝ*) |
26 | 16 | rexrd 11025 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑋) → (2nd ‘(𝐼‘𝑘)) ∈ ℝ*) |
27 | icombl 24728 | . . . . . 6 ⊢ (((1st ‘(𝐼‘𝑘)) ∈ ℝ ∧ (2nd ‘(𝐼‘𝑘)) ∈ ℝ*) → ((1st ‘(𝐼‘𝑘))[,)(2nd ‘(𝐼‘𝑘))) ∈ dom vol) | |
28 | 14, 26, 27 | syl2anc 584 | . . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑋) → ((1st ‘(𝐼‘𝑘))[,)(2nd ‘(𝐼‘𝑘))) ∈ dom vol) |
29 | 10, 28 | eqeltrd 2839 | . . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑋) → (([,) ∘ 𝐼)‘𝑘) ∈ dom vol) |
30 | volge0 43502 | . . . 4 ⊢ ((([,) ∘ 𝐼)‘𝑘) ∈ dom vol → 0 ≤ (vol‘(([,) ∘ 𝐼)‘𝑘))) | |
31 | 29, 30 | syl 17 | . . 3 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑋) → 0 ≤ (vol‘(([,) ∘ 𝐼)‘𝑘))) |
32 | 5, 6, 23, 31 | fprodge0 15703 | . 2 ⊢ (𝜑 → 0 ≤ ∏𝑘 ∈ 𝑋 (vol‘(([,) ∘ 𝐼)‘𝑘))) |
33 | 24 | ltpnfd 12857 | . 2 ⊢ (𝜑 → ∏𝑘 ∈ 𝑋 (vol‘(([,) ∘ 𝐼)‘𝑘)) < +∞) |
34 | 2, 4, 25, 32, 33 | elicod 13129 | 1 ⊢ (𝜑 → ∏𝑘 ∈ 𝑋 (vol‘(([,) ∘ 𝐼)‘𝑘)) ∈ (0[,)+∞)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 396 = wceq 1539 Ⅎwnf 1786 ∈ wcel 2106 ifcif 4459 class class class wbr 5074 × cxp 5587 dom cdm 5589 ∘ ccom 5593 ⟶wf 6429 ‘cfv 6433 (class class class)co 7275 1st c1st 7829 2nd c2nd 7830 Fincfn 8733 ℝcr 10870 0cc0 10871 +∞cpnf 11006 ℝ*cxr 11008 < clt 11009 ≤ cle 11010 − cmin 11205 [,)cico 13081 ∏cprod 15615 volcvol 24627 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2709 ax-rep 5209 ax-sep 5223 ax-nul 5230 ax-pow 5288 ax-pr 5352 ax-un 7588 ax-inf2 9399 ax-cnex 10927 ax-resscn 10928 ax-1cn 10929 ax-icn 10930 ax-addcl 10931 ax-addrcl 10932 ax-mulcl 10933 ax-mulrcl 10934 ax-mulcom 10935 ax-addass 10936 ax-mulass 10937 ax-distr 10938 ax-i2m1 10939 ax-1ne0 10940 ax-1rid 10941 ax-rnegex 10942 ax-rrecex 10943 ax-cnre 10944 ax-pre-lttri 10945 ax-pre-lttrn 10946 ax-pre-ltadd 10947 ax-pre-mulgt0 10948 ax-pre-sup 10949 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3or 1087 df-3an 1088 df-tru 1542 df-fal 1552 df-ex 1783 df-nf 1787 df-sb 2068 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2816 df-nfc 2889 df-ne 2944 df-nel 3050 df-ral 3069 df-rex 3070 df-rmo 3071 df-reu 3072 df-rab 3073 df-v 3434 df-sbc 3717 df-csb 3833 df-dif 3890 df-un 3892 df-in 3894 df-ss 3904 df-pss 3906 df-nul 4257 df-if 4460 df-pw 4535 df-sn 4562 df-pr 4564 df-op 4568 df-uni 4840 df-int 4880 df-iun 4926 df-br 5075 df-opab 5137 df-mpt 5158 df-tr 5192 df-id 5489 df-eprel 5495 df-po 5503 df-so 5504 df-fr 5544 df-se 5545 df-we 5546 df-xp 5595 df-rel 5596 df-cnv 5597 df-co 5598 df-dm 5599 df-rn 5600 df-res 5601 df-ima 5602 df-pred 6202 df-ord 6269 df-on 6270 df-lim 6271 df-suc 6272 df-iota 6391 df-fun 6435 df-fn 6436 df-f 6437 df-f1 6438 df-fo 6439 df-f1o 6440 df-fv 6441 df-isom 6442 df-riota 7232 df-ov 7278 df-oprab 7279 df-mpo 7280 df-of 7533 df-om 7713 df-1st 7831 df-2nd 7832 df-frecs 8097 df-wrecs 8128 df-recs 8202 df-rdg 8241 df-1o 8297 df-2o 8298 df-er 8498 df-map 8617 df-pm 8618 df-en 8734 df-dom 8735 df-sdom 8736 df-fin 8737 df-fi 9170 df-sup 9201 df-inf 9202 df-oi 9269 df-dju 9659 df-card 9697 df-pnf 11011 df-mnf 11012 df-xr 11013 df-ltxr 11014 df-le 11015 df-sub 11207 df-neg 11208 df-div 11633 df-nn 11974 df-2 12036 df-3 12037 df-n0 12234 df-z 12320 df-uz 12583 df-q 12689 df-rp 12731 df-xneg 12848 df-xadd 12849 df-xmul 12850 df-ioo 13083 df-ico 13085 df-icc 13086 df-fz 13240 df-fzo 13383 df-fl 13512 df-seq 13722 df-exp 13783 df-hash 14045 df-cj 14810 df-re 14811 df-im 14812 df-sqrt 14946 df-abs 14947 df-clim 15197 df-rlim 15198 df-sum 15398 df-prod 15616 df-rest 17133 df-topgen 17154 df-psmet 20589 df-xmet 20590 df-met 20591 df-bl 20592 df-mopn 20593 df-top 22043 df-topon 22060 df-bases 22096 df-cmp 22538 df-ovol 24628 df-vol 24629 |
This theorem is referenced by: ovnprodcl 44092 hoiprodcl2 44093 ovnhoilem1 44139 |
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