Nearby theorems
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Mathbox for Thierry Arnoux |
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| Mirrors > Home > MPE Home > Th. List > Mathboxes > measun | Structured version Visualization version GIF version | ||
| Description: The measure the union of two disjoint sets is the sum of their measures. (Contributed by Thierry Arnoux, 10-Mar-2017.) |
| Ref | Expression |
|---|---|
| measun | ⊢ ((𝑀 ∈ (measures‘𝑆) ∧ (𝐴 ∈ 𝑆 ∧ 𝐵 ∈ 𝑆) ∧ (𝐴 ∩ 𝐵) = ∅) → (𝑀‘(𝐴 ∪ 𝐵)) = ((𝑀‘𝐴) +𝑒 (𝑀‘𝐵))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | simp1 1117 | . . 3 ⊢ ((𝑀 ∈ (measures‘𝑆) ∧ (𝐴 ∈ 𝑆 ∧ 𝐵 ∈ 𝑆) ∧ (𝐴 ∩ 𝐵) = ∅) → 𝑀 ∈ (measures‘𝑆)) | |
| 2 | measbase 31133 | . . . . 5 ⊢ (𝑀 ∈ (measures‘𝑆) → 𝑆 ∈ ∪ ran sigAlgebra) | |
| 3 | 2 | 3ad2ant1 1114 | . . . 4 ⊢ ((𝑀 ∈ (measures‘𝑆) ∧ (𝐴 ∈ 𝑆 ∧ 𝐵 ∈ 𝑆) ∧ (𝐴 ∩ 𝐵) = ∅) → 𝑆 ∈ ∪ ran sigAlgebra) |
| 4 | simp2l 1180 | . . . 4 ⊢ ((𝑀 ∈ (measures‘𝑆) ∧ (𝐴 ∈ 𝑆 ∧ 𝐵 ∈ 𝑆) ∧ (𝐴 ∩ 𝐵) = ∅) → 𝐴 ∈ 𝑆) | |
| 5 | simp2r 1181 | . . . 4 ⊢ ((𝑀 ∈ (measures‘𝑆) ∧ (𝐴 ∈ 𝑆 ∧ 𝐵 ∈ 𝑆) ∧ (𝐴 ∩ 𝐵) = ∅) → 𝐵 ∈ 𝑆) | |
| 6 | unelsiga 31070 | . . . 4 ⊢ ((𝑆 ∈ ∪ ran sigAlgebra ∧ 𝐴 ∈ 𝑆 ∧ 𝐵 ∈ 𝑆) → (𝐴 ∪ 𝐵) ∈ 𝑆) | |
| 7 | 3, 4, 5, 6 | syl3anc 1352 | . . 3 ⊢ ((𝑀 ∈ (measures‘𝑆) ∧ (𝐴 ∈ 𝑆 ∧ 𝐵 ∈ 𝑆) ∧ (𝐴 ∩ 𝐵) = ∅) → (𝐴 ∪ 𝐵) ∈ 𝑆) |
| 8 | ssun2 4040 | . . . 4 ⊢ 𝐵 ⊆ (𝐴 ∪ 𝐵) | |
| 9 | 8 | a1i 11 | . . 3 ⊢ ((𝑀 ∈ (measures‘𝑆) ∧ (𝐴 ∈ 𝑆 ∧ 𝐵 ∈ 𝑆) ∧ (𝐴 ∩ 𝐵) = ∅) → 𝐵 ⊆ (𝐴 ∪ 𝐵)) |
| 10 | measxun2 31146 | . . 3 ⊢ ((𝑀 ∈ (measures‘𝑆) ∧ ((𝐴 ∪ 𝐵) ∈ 𝑆 ∧ 𝐵 ∈ 𝑆) ∧ 𝐵 ⊆ (𝐴 ∪ 𝐵)) → (𝑀‘(𝐴 ∪ 𝐵)) = ((𝑀‘𝐵) +𝑒 (𝑀‘((𝐴 ∪ 𝐵) ∖ 𝐵)))) | |
| 11 | 1, 7, 5, 9, 10 | syl121anc 1356 | . 2 ⊢ ((𝑀 ∈ (measures‘𝑆) ∧ (𝐴 ∈ 𝑆 ∧ 𝐵 ∈ 𝑆) ∧ (𝐴 ∩ 𝐵) = ∅) → (𝑀‘(𝐴 ∪ 𝐵)) = ((𝑀‘𝐵) +𝑒 (𝑀‘((𝐴 ∪ 𝐵) ∖ 𝐵)))) |
| 12 | difun2 4315 | . . . . . 6 ⊢ ((𝐴 ∪ 𝐵) ∖ 𝐵) = (𝐴 ∖ 𝐵) | |
| 13 | inundif 4313 | . . . . . . 7 ⊢ ((𝐴 ∩ 𝐵) ∪ (𝐴 ∖ 𝐵)) = 𝐴 | |
| 14 | uneq1 4023 | . . . . . . . 8 ⊢ ((𝐴 ∩ 𝐵) = ∅ → ((𝐴 ∩ 𝐵) ∪ (𝐴 ∖ 𝐵)) = (∅ ∪ (𝐴 ∖ 𝐵))) | |
| 15 | uncom 4020 | . . . . . . . . 9 ⊢ (∅ ∪ (𝐴 ∖ 𝐵)) = ((𝐴 ∖ 𝐵) ∪ ∅) | |
| 16 | un0 4233 | . . . . . . . . 9 ⊢ ((𝐴 ∖ 𝐵) ∪ ∅) = (𝐴 ∖ 𝐵) | |
| 17 | 15, 16 | eqtri 2804 | . . . . . . . 8 ⊢ (∅ ∪ (𝐴 ∖ 𝐵)) = (𝐴 ∖ 𝐵) |
| 18 | 14, 17 | syl6eq 2832 | . . . . . . 7 ⊢ ((𝐴 ∩ 𝐵) = ∅ → ((𝐴 ∩ 𝐵) ∪ (𝐴 ∖ 𝐵)) = (𝐴 ∖ 𝐵)) |
| 19 | 13, 18 | syl5reqr 2831 | . . . . . 6 ⊢ ((𝐴 ∩ 𝐵) = ∅ → (𝐴 ∖ 𝐵) = 𝐴) |
| 20 | 12, 19 | syl5eq 2828 | . . . . 5 ⊢ ((𝐴 ∩ 𝐵) = ∅ → ((𝐴 ∪ 𝐵) ∖ 𝐵) = 𝐴) |
| 21 | 20 | fveq2d 6508 | . . . 4 ⊢ ((𝐴 ∩ 𝐵) = ∅ → (𝑀‘((𝐴 ∪ 𝐵) ∖ 𝐵)) = (𝑀‘𝐴)) |
| 22 | 21 | oveq2d 6998 | . . 3 ⊢ ((𝐴 ∩ 𝐵) = ∅ → ((𝑀‘𝐵) +𝑒 (𝑀‘((𝐴 ∪ 𝐵) ∖ 𝐵))) = ((𝑀‘𝐵) +𝑒 (𝑀‘𝐴))) |
| 23 | 22 | 3ad2ant3 1116 | . 2 ⊢ ((𝑀 ∈ (measures‘𝑆) ∧ (𝐴 ∈ 𝑆 ∧ 𝐵 ∈ 𝑆) ∧ (𝐴 ∩ 𝐵) = ∅) → ((𝑀‘𝐵) +𝑒 (𝑀‘((𝐴 ∪ 𝐵) ∖ 𝐵))) = ((𝑀‘𝐵) +𝑒 (𝑀‘𝐴))) |
| 24 | iccssxr 12641 | . . . . 5 ⊢ (0[,]+∞) ⊆ ℝ* | |
| 25 | measvxrge0 31141 | . . . . 5 ⊢ ((𝑀 ∈ (measures‘𝑆) ∧ 𝐵 ∈ 𝑆) → (𝑀‘𝐵) ∈ (0[,]+∞)) | |
| 26 | 24, 25 | sseldi 3858 | . . . 4 ⊢ ((𝑀 ∈ (measures‘𝑆) ∧ 𝐵 ∈ 𝑆) → (𝑀‘𝐵) ∈ ℝ*) |
| 27 | 1, 5, 26 | syl2anc 576 | . . 3 ⊢ ((𝑀 ∈ (measures‘𝑆) ∧ (𝐴 ∈ 𝑆 ∧ 𝐵 ∈ 𝑆) ∧ (𝐴 ∩ 𝐵) = ∅) → (𝑀‘𝐵) ∈ ℝ*) |
| 28 | measvxrge0 31141 | . . . . 5 ⊢ ((𝑀 ∈ (measures‘𝑆) ∧ 𝐴 ∈ 𝑆) → (𝑀‘𝐴) ∈ (0[,]+∞)) | |
| 29 | 24, 28 | sseldi 3858 | . . . 4 ⊢ ((𝑀 ∈ (measures‘𝑆) ∧ 𝐴 ∈ 𝑆) → (𝑀‘𝐴) ∈ ℝ*) |
| 30 | 1, 4, 29 | syl2anc 576 | . . 3 ⊢ ((𝑀 ∈ (measures‘𝑆) ∧ (𝐴 ∈ 𝑆 ∧ 𝐵 ∈ 𝑆) ∧ (𝐴 ∩ 𝐵) = ∅) → (𝑀‘𝐴) ∈ ℝ*) |
| 31 | xaddcom 12456 | . . 3 ⊢ (((𝑀‘𝐵) ∈ ℝ* ∧ (𝑀‘𝐴) ∈ ℝ*) → ((𝑀‘𝐵) +𝑒 (𝑀‘𝐴)) = ((𝑀‘𝐴) +𝑒 (𝑀‘𝐵))) | |
| 32 | 27, 30, 31 | syl2anc 576 | . 2 ⊢ ((𝑀 ∈ (measures‘𝑆) ∧ (𝐴 ∈ 𝑆 ∧ 𝐵 ∈ 𝑆) ∧ (𝐴 ∩ 𝐵) = ∅) → ((𝑀‘𝐵) +𝑒 (𝑀‘𝐴)) = ((𝑀‘𝐴) +𝑒 (𝑀‘𝐵))) |
| 33 | 11, 23, 32 | 3eqtrd 2820 | 1 ⊢ ((𝑀 ∈ (measures‘𝑆) ∧ (𝐴 ∈ 𝑆 ∧ 𝐵 ∈ 𝑆) ∧ (𝐴 ∩ 𝐵) = ∅) → (𝑀‘(𝐴 ∪ 𝐵)) = ((𝑀‘𝐴) +𝑒 (𝑀‘𝐵))) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 387 ∧ w3a 1069 = wceq 1508 ∈ wcel 2051 ∖ cdif 3828 ∪ cun 3829 ∩ cin 3830 ⊆ wss 3831 ∅c0 4181 ∪ cuni 4717 ran crn 5412 ‘cfv 6193 (class class class)co 6982 0cc0 10341 +∞cpnf 10477 ℝ*cxr 10479 +𝑒 cxad 12328 [,]cicc 12563 sigAlgebracsiga 31043 measurescmeas 31131 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1759 ax-4 1773 ax-5 1870 ax-6 1929 ax-7 1966 ax-8 2053 ax-9 2060 ax-10 2080 ax-11 2094 ax-12 2107 ax-13 2302 ax-ext 2752 ax-rep 5053 ax-sep 5064 ax-nul 5071 ax-pow 5123 ax-pr 5190 ax-un 7285 ax-inf2 8904 ax-ac2 9689 ax-cnex 10397 ax-resscn 10398 ax-1cn 10399 ax-icn 10400 ax-addcl 10401 ax-addrcl 10402 ax-mulcl 10403 ax-mulrcl 10404 ax-mulcom 10405 ax-addass 10406 ax-mulass 10407 ax-distr 10408 ax-i2m1 10409 ax-1ne0 10410 ax-1rid 10411 ax-rnegex 10412 ax-rrecex 10413 ax-cnre 10414 ax-pre-lttri 10415 ax-pre-lttrn 10416 ax-pre-ltadd 10417 ax-pre-mulgt0 10418 ax-pre-sup 10419 ax-addf 10420 ax-mulf 10421 |
| This theorem depends on definitions: df-bi 199 df-an 388 df-or 835 df-3or 1070 df-3an 1071 df-tru 1511 df-fal 1521 df-ex 1744 df-nf 1748 df-sb 2017 df-mo 2551 df-eu 2589 df-clab 2761 df-cleq 2773 df-clel 2848 df-nfc 2920 df-ne 2970 df-nel 3076 df-ral 3095 df-rex 3096 df-reu 3097 df-rmo 3098 df-rab 3099 df-v 3419 df-sbc 3684 df-csb 3789 df-dif 3834 df-un 3836 df-in 3838 df-ss 3845 df-pss 3847 df-nul 4182 df-if 4354 df-pw 4427 df-sn 4445 df-pr 4447 df-tp 4449 df-op 4451 df-uni 4718 df-int 4755 df-iun 4799 df-iin 4800 df-disj 4903 df-br 4935 df-opab 4997 df-mpt 5014 df-tr 5036 df-id 5316 df-eprel 5321 df-po 5330 df-so 5331 df-fr 5370 df-se 5371 df-we 5372 df-xp 5417 df-rel 5418 df-cnv 5419 df-co 5420 df-dm 5421 df-rn 5422 df-res 5423 df-ima 5424 df-pred 5991 df-ord 6037 df-on 6038 df-lim 6039 df-suc 6040 df-iota 6157 df-fun 6195 df-fn 6196 df-f 6197 df-f1 6198 df-fo 6199 df-f1o 6200 df-fv 6201 df-isom 6202 df-riota 6943 df-ov 6985 df-oprab 6986 df-mpo 6987 df-of 7233 df-om 7403 df-1st 7507 df-2nd 7508 df-supp 7640 df-wrecs 7756 df-recs 7818 df-rdg 7856 df-1o 7911 df-2o 7912 df-oadd 7915 df-er 8095 df-map 8214 df-pm 8215 df-ixp 8266 df-en 8313 df-dom 8314 df-sdom 8315 df-fin 8316 df-fsupp 8635 df-fi 8676 df-sup 8707 df-inf 8708 df-oi 8775 df-dju 9130 df-card 9168 df-acn 9171 df-ac 9342 df-cda 9394 df-pnf 10482 df-mnf 10483 df-xr 10484 df-ltxr 10485 df-le 10486 df-sub 10678 df-neg 10679 df-div 11105 df-nn 11446 df-2 11509 df-3 11510 df-4 11511 df-5 11512 df-6 11513 df-7 11514 df-8 11515 df-9 11516 df-n0 11714 df-z 11800 df-dec 11918 df-uz 12065 df-q 12169 df-rp 12211 df-xneg 12330 df-xadd 12331 df-xmul 12332 df-ioo 12564 df-ioc 12565 df-ico 12566 df-icc 12567 df-fz 12715 df-fzo 12856 df-fl 12983 df-mod 13059 df-seq 13191 df-exp 13251 df-fac 13455 df-bc 13484 df-hash 13512 df-shft 14293 df-cj 14325 df-re 14326 df-im 14327 df-sqrt 14461 df-abs 14462 df-limsup 14695 df-clim 14712 df-rlim 14713 df-sum 14910 df-ef 15287 df-sin 15289 df-cos 15290 df-pi 15292 df-struct 16347 df-ndx 16348 df-slot 16349 df-base 16351 df-sets 16352 df-ress 16353 df-plusg 16440 df-mulr 16441 df-starv 16442 df-sca 16443 df-vsca 16444 df-ip 16445 df-tset 16446 df-ple 16447 df-ds 16449 df-unif 16450 df-hom 16451 df-cco 16452 df-rest 16558 df-topn 16559 df-0g 16577 df-gsum 16578 df-topgen 16579 df-pt 16580 df-prds 16583 df-ordt 16636 df-xrs 16637 df-qtop 16642 df-imas 16643 df-xps 16645 df-mre 16727 df-mrc 16728 df-acs 16730 df-ps 17680 df-tsr 17681 df-plusf 17721 df-mgm 17722 df-sgrp 17764 df-mnd 17775 df-mhm 17815 df-submnd 17816 df-grp 17906 df-minusg 17907 df-sbg 17908 df-mulg 18024 df-subg 18072 df-cntz 18230 df-cmn 18680 df-abl 18681 df-mgp 18975 df-ur 18987 df-ring 19034 df-cring 19035 df-subrg 19268 df-abv 19322 df-lmod 19370 df-scaf 19371 df-sra 19678 df-rgmod 19679 df-psmet 20254 df-xmet 20255 df-met 20256 df-bl 20257 df-mopn 20258 df-fbas 20259 df-fg 20260 df-cnfld 20263 df-top 21221 df-topon 21238 df-topsp 21260 df-bases 21273 df-cld 21346 df-ntr 21347 df-cls 21348 df-nei 21425 df-lp 21463 df-perf 21464 df-cn 21554 df-cnp 21555 df-haus 21642 df-tx 21889 df-hmeo 22082 df-fil 22173 df-fm 22265 df-flim 22266 df-flf 22267 df-tmd 22399 df-tgp 22400 df-tsms 22453 df-trg 22486 df-xms 22648 df-ms 22649 df-tms 22650 df-nm 22910 df-ngp 22911 df-nrg 22913 df-nlm 22914 df-ii 23203 df-cncf 23204 df-limc 24182 df-dv 24183 df-log 24856 df-esum 30963 df-siga 31044 df-meas 31132 |
| This theorem is referenced by: measvuni 31150 measunl 31152 |
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