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| Mirrors > Home > MPE Home > Th. List > Mathboxes > meaunle | Structured version Visualization version GIF version | ||
| Description: The measure of the union of two sets is less than or equal to the sum of the measures, Property 112C (c) of [Fremlin1] p. 15. (Contributed by Glauco Siliprandi, 17-Aug-2020.) |
| Ref | Expression |
|---|---|
| meaunle.1 | ⊢ (𝜑 → 𝑀 ∈ Meas) |
| meaunle.2 | ⊢ 𝑆 = dom 𝑀 |
| meaunle.3 | ⊢ (𝜑 → 𝐴 ∈ 𝑆) |
| meaunle.4 | ⊢ (𝜑 → 𝐵 ∈ 𝑆) |
| Ref | Expression |
|---|---|
| meaunle | ⊢ (𝜑 → (𝑀‘(𝐴 ∪ 𝐵)) ≤ ((𝑀‘𝐴) +𝑒 (𝑀‘𝐵))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | undif2 4430 | . . . . . 6 ⊢ (𝐴 ∪ (𝐵 ∖ 𝐴)) = (𝐴 ∪ 𝐵) | |
| 2 | 1 | eqcomi 2769 | . . . . 5 ⊢ (𝐴 ∪ 𝐵) = (𝐴 ∪ (𝐵 ∖ 𝐴)) |
| 3 | 2 | fveq2i 6876 | . . . 4 ⊢ (𝑀‘(𝐴 ∪ 𝐵)) = (𝑀‘(𝐴 ∪ (𝐵 ∖ 𝐴))) |
| 4 | 3 | a1i 11 | . . 3 ⊢ (𝜑 → (𝑀‘(𝐴 ∪ 𝐵)) = (𝑀‘(𝐴 ∪ (𝐵 ∖ 𝐴)))) |
| 5 | meaunle.1 | . . . 4 ⊢ (𝜑 → 𝑀 ∈ Meas) | |
| 6 | meaunle.2 | . . . 4 ⊢ 𝑆 = dom 𝑀 | |
| 7 | meaunle.3 | . . . 4 ⊢ (𝜑 → 𝐴 ∈ 𝑆) | |
| 8 | 5, 6 | dmmeasal 47384 | . . . . 5 ⊢ (𝜑 → 𝑆 ∈ SAlg) |
| 9 | meaunle.4 | . . . . 5 ⊢ (𝜑 → 𝐵 ∈ 𝑆) | |
| 10 | saldifcl2 47260 | . . . . 5 ⊢ ((𝑆 ∈ SAlg ∧ 𝐵 ∈ 𝑆 ∧ 𝐴 ∈ 𝑆) → (𝐵 ∖ 𝐴) ∈ 𝑆) | |
| 11 | 8, 9, 7, 10 | syl3anc 1398 | . . . 4 ⊢ (𝜑 → (𝐵 ∖ 𝐴) ∈ 𝑆) |
| 12 | disjdif 4425 | . . . . 5 ⊢ (𝐴 ∩ (𝐵 ∖ 𝐴)) = ∅ | |
| 13 | 12 | a1i 11 | . . . 4 ⊢ (𝜑 → (𝐴 ∩ (𝐵 ∖ 𝐴)) = ∅) |
| 14 | 5, 6, 7, 11, 13 | meadjun 47394 | . . 3 ⊢ (𝜑 → (𝑀‘(𝐴 ∪ (𝐵 ∖ 𝐴))) = ((𝑀‘𝐴) +𝑒 (𝑀‘(𝐵 ∖ 𝐴)))) |
| 15 | 4, 14 | eqtrd 2795 | . 2 ⊢ (𝜑 → (𝑀‘(𝐴 ∪ 𝐵)) = ((𝑀‘𝐴) +𝑒 (𝑀‘(𝐵 ∖ 𝐴)))) |
| 16 | 5, 6, 11 | meaxrcl 47393 | . . 3 ⊢ (𝜑 → (𝑀‘(𝐵 ∖ 𝐴)) ∈ ℝ*) |
| 17 | 5, 6, 9 | meaxrcl 47393 | . . 3 ⊢ (𝜑 → (𝑀‘𝐵) ∈ ℝ*) |
| 18 | 5, 6, 7 | meaxrcl 47393 | . . 3 ⊢ (𝜑 → (𝑀‘𝐴) ∈ ℝ*) |
| 19 | difssd 4083 | . . . 4 ⊢ (𝜑 → (𝐵 ∖ 𝐴) ⊆ 𝐵) | |
| 20 | 5, 6, 11, 9, 19 | meassle 47395 | . . 3 ⊢ (𝜑 → (𝑀‘(𝐵 ∖ 𝐴)) ≤ (𝑀‘𝐵)) |
| 21 | 16, 17, 18, 20 | xleadd2d 46261 | . 2 ⊢ (𝜑 → ((𝑀‘𝐴) +𝑒 (𝑀‘(𝐵 ∖ 𝐴))) ≤ ((𝑀‘𝐴) +𝑒 (𝑀‘𝐵))) |
| 22 | 15, 21 | eqbrtrd 5126 | 1 ⊢ (𝜑 → (𝑀‘(𝐴 ∪ 𝐵)) ≤ ((𝑀‘𝐴) +𝑒 (𝑀‘𝐵))) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1570 ∈ wcel 2145 ∖ cdif 3895 ∪ cun 3896 ∩ cin 3897 ∅c0 4278 class class class wbr 5102 dom cdm 5647 ‘cfv 6527 (class class class)co 7408 ≤ cle 11315 +𝑒 cxad 13208 SAlgcsalg 47240 Meascmea 47381 |
| 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 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2732 ax-rep 5231 ax-sep 5248 ax-nul 5259 ax-pow 5326 ax-pr 5390 ax-un 7734 ax-inf2 9620 ax-cnex 11227 ax-resscn 11228 ax-1cn 11229 ax-icn 11230 ax-addcl 11231 ax-addrcl 11232 ax-mulcl 11233 ax-mulrcl 11234 ax-mulcom 11235 ax-addass 11236 ax-mulass 11237 ax-distr 11238 ax-i2m1 11239 ax-1ne0 11240 ax-1rid 11241 ax-rnegex 11242 ax-rrecex 11243 ax-cnre 11244 ax-pre-lttri 11245 ax-pre-lttrn 11246 ax-pre-ltadd 11247 ax-pre-mulgt0 11248 ax-pre-sup 11249 |
| 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 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-nel 3062 df-ral 3077 df-rex 3087 df-rmo 3365 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3739 df-csb 3847 df-dif 3901 df-un 3903 df-in 3905 df-ss 3915 df-pss 3918 df-nul 4279 df-if 4482 df-pw 4558 df-sn 4584 df-pr 4586 df-op 4590 df-uni 4867 df-int 4907 df-iun 4952 df-disj 5070 df-br 5103 df-opab 5167 df-mpt 5186 df-tr 5212 df-id 5542 df-eprel 5547 df-po 5555 df-so 5556 df-fr 5600 df-se 5601 df-we 5602 df-xp 5653 df-rel 5654 df-cnv 5655 df-co 5656 df-dm 5657 df-rn 5658 df-res 5659 df-ima 5660 df-pred 6293 df-ord 6354 df-on 6355 df-lim 6356 df-suc 6357 df-iota 6483 df-fun 6529 df-fn 6530 df-f 6531 df-f1 6532 df-fo 6533 df-f1o 6534 df-fv 6535 df-isom 6536 df-riota 7365 df-ov 7411 df-oprab 7412 df-mpo 7413 df-om 7861 df-1st 7984 df-2nd 7985 df-frecs 8277 df-wrecs 8308 df-recs 8357 df-rdg 8396 df-1o 8454 df-2o 8455 df-er 8695 df-en 8952 df-dom 8953 df-sdom 8954 df-fin 8955 df-sup 9412 df-oi 9482 df-card 9991 df-pnf 11316 df-mnf 11317 df-xr 11318 df-ltxr 11319 df-le 11320 df-sub 11514 df-neg 11515 df-div 11943 df-nn 12305 df-2 12374 df-3 12375 df-n0 12576 df-z 12663 df-uz 12935 df-rp 13090 df-xadd 13211 df-ico 13451 df-icc 13452 df-fz 13609 df-fzo 13757 df-seq 14113 df-exp 14173 df-hash 14442 df-cj 15233 df-re 15234 df-im 15235 df-sqrt 15369 df-abs 15370 df-clim 15622 df-sum 15821 df-salg 47241 df-sumge0 47295 df-mea 47382 |
| This theorem is used by: (None) |
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