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 1131 | . . 3 ⊢ ((𝑀 ∈ (measures‘𝑆) ∧ (𝐴 ∈ 𝑆 ∧ 𝐵 ∈ 𝑆) ∧ (𝐴 ∩ 𝐵) = ∅) → 𝑀 ∈ (measures‘𝑆)) | |
| 2 | measbase 31477 | . . . . 5 ⊢ (𝑀 ∈ (measures‘𝑆) → 𝑆 ∈ ∪ ran sigAlgebra) | |
| 3 | 2 | 3ad2ant1 1128 | . . . 4 ⊢ ((𝑀 ∈ (measures‘𝑆) ∧ (𝐴 ∈ 𝑆 ∧ 𝐵 ∈ 𝑆) ∧ (𝐴 ∩ 𝐵) = ∅) → 𝑆 ∈ ∪ ran sigAlgebra) |
| 4 | simp2l 1194 | . . . 4 ⊢ ((𝑀 ∈ (measures‘𝑆) ∧ (𝐴 ∈ 𝑆 ∧ 𝐵 ∈ 𝑆) ∧ (𝐴 ∩ 𝐵) = ∅) → 𝐴 ∈ 𝑆) | |
| 5 | simp2r 1195 | . . . 4 ⊢ ((𝑀 ∈ (measures‘𝑆) ∧ (𝐴 ∈ 𝑆 ∧ 𝐵 ∈ 𝑆) ∧ (𝐴 ∩ 𝐵) = ∅) → 𝐵 ∈ 𝑆) | |
| 6 | unelsiga 31414 | . . . 4 ⊢ ((𝑆 ∈ ∪ ran sigAlgebra ∧ 𝐴 ∈ 𝑆 ∧ 𝐵 ∈ 𝑆) → (𝐴 ∪ 𝐵) ∈ 𝑆) | |
| 7 | 3, 4, 5, 6 | syl3anc 1366 | . . 3 ⊢ ((𝑀 ∈ (measures‘𝑆) ∧ (𝐴 ∈ 𝑆 ∧ 𝐵 ∈ 𝑆) ∧ (𝐴 ∩ 𝐵) = ∅) → (𝐴 ∪ 𝐵) ∈ 𝑆) |
| 8 | ssun2 4142 | . . . 4 ⊢ 𝐵 ⊆ (𝐴 ∪ 𝐵) | |
| 9 | 8 | a1i 11 | . . 3 ⊢ ((𝑀 ∈ (measures‘𝑆) ∧ (𝐴 ∈ 𝑆 ∧ 𝐵 ∈ 𝑆) ∧ (𝐴 ∩ 𝐵) = ∅) → 𝐵 ⊆ (𝐴 ∪ 𝐵)) |
| 10 | measxun2 31490 | . . 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 1370 | . 2 ⊢ ((𝑀 ∈ (measures‘𝑆) ∧ (𝐴 ∈ 𝑆 ∧ 𝐵 ∈ 𝑆) ∧ (𝐴 ∩ 𝐵) = ∅) → (𝑀‘(𝐴 ∪ 𝐵)) = ((𝑀‘𝐵) +𝑒 (𝑀‘((𝐴 ∪ 𝐵) ∖ 𝐵)))) |
| 12 | difun2 4422 | . . . . . 6 ⊢ ((𝐴 ∪ 𝐵) ∖ 𝐵) = (𝐴 ∖ 𝐵) | |
| 13 | inundif 4420 | . . . . . . 7 ⊢ ((𝐴 ∩ 𝐵) ∪ (𝐴 ∖ 𝐵)) = 𝐴 | |
| 14 | uneq1 4125 | . . . . . . . 8 ⊢ ((𝐴 ∩ 𝐵) = ∅ → ((𝐴 ∩ 𝐵) ∪ (𝐴 ∖ 𝐵)) = (∅ ∪ (𝐴 ∖ 𝐵))) | |
| 15 | uncom 4122 | . . . . . . . . 9 ⊢ (∅ ∪ (𝐴 ∖ 𝐵)) = ((𝐴 ∖ 𝐵) ∪ ∅) | |
| 16 | un0 4337 | . . . . . . . . 9 ⊢ ((𝐴 ∖ 𝐵) ∪ ∅) = (𝐴 ∖ 𝐵) | |
| 17 | 15, 16 | eqtri 2843 | . . . . . . . 8 ⊢ (∅ ∪ (𝐴 ∖ 𝐵)) = (𝐴 ∖ 𝐵) |
| 18 | 14, 17 | syl6eq 2871 | . . . . . . 7 ⊢ ((𝐴 ∩ 𝐵) = ∅ → ((𝐴 ∩ 𝐵) ∪ (𝐴 ∖ 𝐵)) = (𝐴 ∖ 𝐵)) |
| 19 | 13, 18 | syl5reqr 2870 | . . . . . 6 ⊢ ((𝐴 ∩ 𝐵) = ∅ → (𝐴 ∖ 𝐵) = 𝐴) |
| 20 | 12, 19 | syl5eq 2867 | . . . . 5 ⊢ ((𝐴 ∩ 𝐵) = ∅ → ((𝐴 ∪ 𝐵) ∖ 𝐵) = 𝐴) |
| 21 | 20 | fveq2d 6667 | . . . 4 ⊢ ((𝐴 ∩ 𝐵) = ∅ → (𝑀‘((𝐴 ∪ 𝐵) ∖ 𝐵)) = (𝑀‘𝐴)) |
| 22 | 21 | oveq2d 7165 | . . 3 ⊢ ((𝐴 ∩ 𝐵) = ∅ → ((𝑀‘𝐵) +𝑒 (𝑀‘((𝐴 ∪ 𝐵) ∖ 𝐵))) = ((𝑀‘𝐵) +𝑒 (𝑀‘𝐴))) |
| 23 | 22 | 3ad2ant3 1130 | . 2 ⊢ ((𝑀 ∈ (measures‘𝑆) ∧ (𝐴 ∈ 𝑆 ∧ 𝐵 ∈ 𝑆) ∧ (𝐴 ∩ 𝐵) = ∅) → ((𝑀‘𝐵) +𝑒 (𝑀‘((𝐴 ∪ 𝐵) ∖ 𝐵))) = ((𝑀‘𝐵) +𝑒 (𝑀‘𝐴))) |
| 24 | iccssxr 12813 | . . . . 5 ⊢ (0[,]+∞) ⊆ ℝ* | |
| 25 | measvxrge0 31485 | . . . . 5 ⊢ ((𝑀 ∈ (measures‘𝑆) ∧ 𝐵 ∈ 𝑆) → (𝑀‘𝐵) ∈ (0[,]+∞)) | |
| 26 | 24, 25 | sseldi 3958 | . . . 4 ⊢ ((𝑀 ∈ (measures‘𝑆) ∧ 𝐵 ∈ 𝑆) → (𝑀‘𝐵) ∈ ℝ*) |
| 27 | 1, 5, 26 | syl2anc 586 | . . 3 ⊢ ((𝑀 ∈ (measures‘𝑆) ∧ (𝐴 ∈ 𝑆 ∧ 𝐵 ∈ 𝑆) ∧ (𝐴 ∩ 𝐵) = ∅) → (𝑀‘𝐵) ∈ ℝ*) |
| 28 | measvxrge0 31485 | . . . . 5 ⊢ ((𝑀 ∈ (measures‘𝑆) ∧ 𝐴 ∈ 𝑆) → (𝑀‘𝐴) ∈ (0[,]+∞)) | |
| 29 | 24, 28 | sseldi 3958 | . . . 4 ⊢ ((𝑀 ∈ (measures‘𝑆) ∧ 𝐴 ∈ 𝑆) → (𝑀‘𝐴) ∈ ℝ*) |
| 30 | 1, 4, 29 | syl2anc 586 | . . 3 ⊢ ((𝑀 ∈ (measures‘𝑆) ∧ (𝐴 ∈ 𝑆 ∧ 𝐵 ∈ 𝑆) ∧ (𝐴 ∩ 𝐵) = ∅) → (𝑀‘𝐴) ∈ ℝ*) |
| 31 | xaddcom 12627 | . . 3 ⊢ (((𝑀‘𝐵) ∈ ℝ* ∧ (𝑀‘𝐴) ∈ ℝ*) → ((𝑀‘𝐵) +𝑒 (𝑀‘𝐴)) = ((𝑀‘𝐴) +𝑒 (𝑀‘𝐵))) | |
| 32 | 27, 30, 31 | syl2anc 586 | . 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 2859 | 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 398 ∧ w3a 1082 = wceq 1536 ∈ wcel 2113 ∖ cdif 3926 ∪ cun 3927 ∩ cin 3928 ⊆ wss 3929 ∅c0 4284 ∪ cuni 4831 ran crn 5549 ‘cfv 6348 (class class class)co 7149 0cc0 10530 +∞cpnf 10665 ℝ*cxr 10667 +𝑒 cxad 12499 [,]cicc 12735 sigAlgebracsiga 31388 measurescmeas 31475 |
| 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-ac2 9878 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 ax-addf 10609 ax-mulf 10610 |
| 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-iin 4915 df-disj 5025 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-supp 7824 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-ixp 8455 df-en 8503 df-dom 8504 df-sdom 8505 df-fin 8506 df-fsupp 8827 df-fi 8868 df-sup 8899 df-inf 8900 df-oi 8967 df-dju 9323 df-card 9361 df-acn 9364 df-ac 9535 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-4 11696 df-5 11697 df-6 11698 df-7 11699 df-8 11700 df-9 11701 df-n0 11892 df-z 11976 df-dec 12093 df-uz 12238 df-q 12343 df-rp 12384 df-xneg 12501 df-xadd 12502 df-xmul 12503 df-ioo 12736 df-ioc 12737 df-ico 12738 df-icc 12739 df-fz 12890 df-fzo 13031 df-fl 13159 df-mod 13235 df-seq 13367 df-exp 13427 df-fac 13631 df-bc 13660 df-hash 13688 df-shft 14421 df-cj 14453 df-re 14454 df-im 14455 df-sqrt 14589 df-abs 14590 df-limsup 14823 df-clim 14840 df-rlim 14841 df-sum 15038 df-ef 15416 df-sin 15418 df-cos 15419 df-pi 15421 df-struct 16480 df-ndx 16481 df-slot 16482 df-base 16484 df-sets 16485 df-ress 16486 df-plusg 16573 df-mulr 16574 df-starv 16575 df-sca 16576 df-vsca 16577 df-ip 16578 df-tset 16579 df-ple 16580 df-ds 16582 df-unif 16583 df-hom 16584 df-cco 16585 df-rest 16691 df-topn 16692 df-0g 16710 df-gsum 16711 df-topgen 16712 df-pt 16713 df-prds 16716 df-ordt 16769 df-xrs 16770 df-qtop 16775 df-imas 16776 df-xps 16778 df-mre 16852 df-mrc 16853 df-acs 16855 df-ps 17805 df-tsr 17806 df-plusf 17846 df-mgm 17847 df-sgrp 17896 df-mnd 17907 df-mhm 17951 df-submnd 17952 df-grp 18101 df-minusg 18102 df-sbg 18103 df-mulg 18220 df-subg 18271 df-cntz 18442 df-cmn 18903 df-abl 18904 df-mgp 19235 df-ur 19247 df-ring 19294 df-cring 19295 df-subrg 19528 df-abv 19583 df-lmod 19631 df-scaf 19632 df-sra 19939 df-rgmod 19940 df-psmet 20532 df-xmet 20533 df-met 20534 df-bl 20535 df-mopn 20536 df-fbas 20537 df-fg 20538 df-cnfld 20541 df-top 21497 df-topon 21514 df-topsp 21536 df-bases 21549 df-cld 21622 df-ntr 21623 df-cls 21624 df-nei 21701 df-lp 21739 df-perf 21740 df-cn 21830 df-cnp 21831 df-haus 21918 df-tx 22165 df-hmeo 22358 df-fil 22449 df-fm 22541 df-flim 22542 df-flf 22543 df-tmd 22675 df-tgp 22676 df-tsms 22730 df-trg 22763 df-xms 22925 df-ms 22926 df-tms 22927 df-nm 23187 df-ngp 23188 df-nrg 23190 df-nlm 23191 df-ii 23480 df-cncf 23481 df-limc 24461 df-dv 24462 df-log 25138 df-esum 31308 df-siga 31389 df-meas 31476 |
| This theorem is referenced by: measvuni 31494 measunl 31496 |
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