Mathbox for Glauco Siliprandi |
< Previous
Next >
Nearby theorems |
||
Mirrors > Home > MPE Home > Th. List > Mathboxes > hoiprodcl3 | Structured version Visualization version GIF version |
Description: The pre-measure of half-open intervals is a nonnegative real. (Contributed by Glauco Siliprandi, 21-Nov-2020.) |
Ref | Expression |
---|---|
hoiprodcl3.k | ⊢ Ⅎ𝑘𝜑 |
hoiprodcl3.x | ⊢ (𝜑 → 𝑋 ∈ Fin) |
hoiprodcl3.a | ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑋) → 𝐴 ∈ ℝ) |
hoiprodcl3.b | ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑋) → 𝐵 ∈ ℝ) |
Ref | Expression |
---|---|
hoiprodcl3 | ⊢ (𝜑 → ∏𝑘 ∈ 𝑋 (vol‘(𝐴[,)𝐵)) ∈ (0[,)+∞)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 0xr 10681 | . . 3 ⊢ 0 ∈ ℝ* | |
2 | 1 | a1i 11 | . 2 ⊢ (𝜑 → 0 ∈ ℝ*) |
3 | pnfxr 10688 | . . 3 ⊢ +∞ ∈ ℝ* | |
4 | 3 | a1i 11 | . 2 ⊢ (𝜑 → +∞ ∈ ℝ*) |
5 | hoiprodcl3.k | . . . 4 ⊢ Ⅎ𝑘𝜑 | |
6 | hoiprodcl3.x | . . . 4 ⊢ (𝜑 → 𝑋 ∈ Fin) | |
7 | hoiprodcl3.a | . . . . . 6 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑋) → 𝐴 ∈ ℝ) | |
8 | hoiprodcl3.b | . . . . . 6 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑋) → 𝐵 ∈ ℝ) | |
9 | volico 42342 | . . . . . 6 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (vol‘(𝐴[,)𝐵)) = if(𝐴 < 𝐵, (𝐵 − 𝐴), 0)) | |
10 | 7, 8, 9 | syl2anc 586 | . . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑋) → (vol‘(𝐴[,)𝐵)) = if(𝐴 < 𝐵, (𝐵 − 𝐴), 0)) |
11 | 8, 7 | resubcld 11061 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑋) → (𝐵 − 𝐴) ∈ ℝ) |
12 | 0red 10637 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑋) → 0 ∈ ℝ) | |
13 | 11, 12 | ifcld 4505 | . . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑋) → if(𝐴 < 𝐵, (𝐵 − 𝐴), 0) ∈ ℝ) |
14 | 10, 13 | eqeltrd 2912 | . . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑋) → (vol‘(𝐴[,)𝐵)) ∈ ℝ) |
15 | 5, 6, 14 | fprodreclf 15308 | . . 3 ⊢ (𝜑 → ∏𝑘 ∈ 𝑋 (vol‘(𝐴[,)𝐵)) ∈ ℝ) |
16 | 15 | rexrd 10684 | . 2 ⊢ (𝜑 → ∏𝑘 ∈ 𝑋 (vol‘(𝐴[,)𝐵)) ∈ ℝ*) |
17 | 8 | rexrd 10684 | . . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑋) → 𝐵 ∈ ℝ*) |
18 | icombl 24160 | . . . . 5 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ*) → (𝐴[,)𝐵) ∈ dom vol) | |
19 | 7, 17, 18 | syl2anc 586 | . . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑋) → (𝐴[,)𝐵) ∈ dom vol) |
20 | volge0 42320 | . . . 4 ⊢ ((𝐴[,)𝐵) ∈ dom vol → 0 ≤ (vol‘(𝐴[,)𝐵))) | |
21 | 19, 20 | syl 17 | . . 3 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑋) → 0 ≤ (vol‘(𝐴[,)𝐵))) |
22 | 5, 6, 14, 21 | fprodge0 15342 | . 2 ⊢ (𝜑 → 0 ≤ ∏𝑘 ∈ 𝑋 (vol‘(𝐴[,)𝐵))) |
23 | 15 | ltpnfd 12510 | . 2 ⊢ (𝜑 → ∏𝑘 ∈ 𝑋 (vol‘(𝐴[,)𝐵)) < +∞) |
24 | 2, 4, 16, 22, 23 | elicod 12781 | 1 ⊢ (𝜑 → ∏𝑘 ∈ 𝑋 (vol‘(𝐴[,)𝐵)) ∈ (0[,)+∞)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 398 = wceq 1536 Ⅎwnf 1783 ∈ wcel 2113 ifcif 4460 class class class wbr 5059 dom cdm 5548 ‘cfv 6348 (class class class)co 7149 Fincfn 8502 ℝcr 10529 0cc0 10530 +∞cpnf 10665 ℝ*cxr 10667 < clt 10668 ≤ cle 10669 − cmin 10863 [,)cico 12734 ∏cprod 15254 volcvol 24059 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1969 ax-7 2014 ax-8 2115 ax-9 2123 ax-10 2144 ax-11 2160 ax-12 2176 ax-ext 2792 ax-rep 5183 ax-sep 5196 ax-nul 5203 ax-pow 5259 ax-pr 5323 ax-un 7454 ax-inf2 9097 ax-cnex 10586 ax-resscn 10587 ax-1cn 10588 ax-icn 10589 ax-addcl 10590 ax-addrcl 10591 ax-mulcl 10592 ax-mulrcl 10593 ax-mulcom 10594 ax-addass 10595 ax-mulass 10596 ax-distr 10597 ax-i2m1 10598 ax-1ne0 10599 ax-1rid 10600 ax-rnegex 10601 ax-rrecex 10602 ax-cnre 10603 ax-pre-lttri 10604 ax-pre-lttrn 10605 ax-pre-ltadd 10606 ax-pre-mulgt0 10607 ax-pre-sup 10608 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3or 1083 df-3an 1084 df-tru 1539 df-fal 1549 df-ex 1780 df-nf 1784 df-sb 2069 df-mo 2621 df-eu 2653 df-clab 2799 df-cleq 2813 df-clel 2892 df-nfc 2962 df-ne 3016 df-nel 3123 df-ral 3142 df-rex 3143 df-reu 3144 df-rmo 3145 df-rab 3146 df-v 3493 df-sbc 3769 df-csb 3877 df-dif 3932 df-un 3934 df-in 3936 df-ss 3945 df-pss 3947 df-nul 4285 df-if 4461 df-pw 4534 df-sn 4561 df-pr 4563 df-tp 4565 df-op 4567 df-uni 4832 df-int 4870 df-iun 4914 df-br 5060 df-opab 5122 df-mpt 5140 df-tr 5166 df-id 5453 df-eprel 5458 df-po 5467 df-so 5468 df-fr 5507 df-se 5508 df-we 5509 df-xp 5554 df-rel 5555 df-cnv 5556 df-co 5557 df-dm 5558 df-rn 5559 df-res 5560 df-ima 5561 df-pred 6141 df-ord 6187 df-on 6188 df-lim 6189 df-suc 6190 df-iota 6307 df-fun 6350 df-fn 6351 df-f 6352 df-f1 6353 df-fo 6354 df-f1o 6355 df-fv 6356 df-isom 6357 df-riota 7107 df-ov 7152 df-oprab 7153 df-mpo 7154 df-of 7402 df-om 7574 df-1st 7682 df-2nd 7683 df-wrecs 7940 df-recs 8001 df-rdg 8039 df-1o 8095 df-2o 8096 df-oadd 8099 df-er 8282 df-map 8401 df-pm 8402 df-en 8503 df-dom 8504 df-sdom 8505 df-fin 8506 df-fi 8868 df-sup 8899 df-inf 8900 df-oi 8967 df-dju 9323 df-card 9361 df-pnf 10670 df-mnf 10671 df-xr 10672 df-ltxr 10673 df-le 10674 df-sub 10865 df-neg 10866 df-div 11291 df-nn 11632 df-2 11694 df-3 11695 df-n0 11892 df-z 11976 df-uz 12238 df-q 12343 df-rp 12384 df-xneg 12501 df-xadd 12502 df-xmul 12503 df-ioo 12736 df-ico 12738 df-icc 12739 df-fz 12890 df-fzo 13031 df-fl 13159 df-seq 13367 df-exp 13427 df-hash 13688 df-cj 14453 df-re 14454 df-im 14455 df-sqrt 14589 df-abs 14590 df-clim 14840 df-rlim 14841 df-sum 15038 df-prod 15255 df-rest 16691 df-topgen 16712 df-psmet 20532 df-xmet 20533 df-met 20534 df-bl 20535 df-mopn 20536 df-top 21497 df-topon 21514 df-bases 21549 df-cmp 21990 df-ovol 24060 df-vol 24061 |
This theorem is referenced by: ovnhoilem1 42957 |
Copyright terms: Public domain | W3C validator |