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| Mirrors > Home > MPE Home > Th. List > Mathboxes > omelesplit | Structured version Visualization version GIF version | ||
| Description: The outer measure of a set 𝐴 is less than or equal to the extended addition of the outer measures of the decomposition induced on 𝐴 by any 𝐸. Step (a) in the proof of Caratheodory's Method, Theorem 113C of [Fremlin1] p. 19. (Contributed by Glauco Siliprandi, 17-Aug-2020.) |
| Ref | Expression |
|---|---|
| omelesplit.1 | ⊢ (𝜑 → 𝑂 ∈ OutMeas) |
| omelesplit.2 | ⊢ 𝑋 = ∪ dom 𝑂 |
| omelesplit.3 | ⊢ (𝜑 → 𝐴 ⊆ 𝑋) |
| Ref | Expression |
|---|---|
| omelesplit | ⊢ (𝜑 → (𝑂‘𝐴) ≤ ((𝑂‘(𝐴 ∩ 𝐸)) +𝑒 (𝑂‘(𝐴 ∖ 𝐸)))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | inundif 4442 | . . . . 5 ⊢ ((𝐴 ∩ 𝐸) ∪ (𝐴 ∖ 𝐸)) = 𝐴 | |
| 2 | 1 | eqcomi 2774 | . . . 4 ⊢ 𝐴 = ((𝐴 ∩ 𝐸) ∪ (𝐴 ∖ 𝐸)) |
| 3 | 2 | a1i 11 | . . 3 ⊢ (𝜑 → 𝐴 = ((𝐴 ∩ 𝐸) ∪ (𝐴 ∖ 𝐸))) |
| 4 | 3 | fveq2d 6889 | . 2 ⊢ (𝜑 → (𝑂‘𝐴) = (𝑂‘((𝐴 ∩ 𝐸) ∪ (𝐴 ∖ 𝐸)))) |
| 5 | omelesplit.1 | . . 3 ⊢ (𝜑 → 𝑂 ∈ OutMeas) | |
| 6 | omelesplit.2 | . . 3 ⊢ 𝑋 = ∪ dom 𝑂 | |
| 7 | omelesplit.3 | . . . 4 ⊢ (𝜑 → 𝐴 ⊆ 𝑋) | |
| 8 | ssinss1 4198 | . . . 4 ⊢ (𝐴 ⊆ 𝑋 → (𝐴 ∩ 𝐸) ⊆ 𝑋) | |
| 9 | 7, 8 | syl 18 | . . 3 ⊢ (𝜑 → (𝐴 ∩ 𝐸) ⊆ 𝑋) |
| 10 | 7 | ssdifssd 4101 | . . 3 ⊢ (𝜑 → (𝐴 ∖ 𝐸) ⊆ 𝑋) |
| 11 | 5, 6, 9, 10 | omeunle 47288 | . 2 ⊢ (𝜑 → (𝑂‘((𝐴 ∩ 𝐸) ∪ (𝐴 ∖ 𝐸))) ≤ ((𝑂‘(𝐴 ∩ 𝐸)) +𝑒 (𝑂‘(𝐴 ∖ 𝐸)))) |
| 12 | 4, 11 | eqbrtrd 5135 | 1 ⊢ (𝜑 → (𝑂‘𝐴) ≤ ((𝑂‘(𝐴 ∩ 𝐸)) +𝑒 (𝑂‘(𝐴 ∖ 𝐸)))) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1570 ∈ wcel 2146 ∖ cdif 3903 ∪ cun 3904 ∩ cin 3905 ⊆ wss 3906 ∪ cuni 4874 class class class wbr 5111 dom cdm 5663 ‘cfv 6540 (class class class)co 7419 ≤ cle 11259 +𝑒 cxad 13151 OutMeascome 47261 |
| 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 2148 ax-9 2156 ax-10 2179 ax-11 2195 ax-12 2216 ax-ext 2737 ax-rep 5240 ax-sep 5259 ax-nul 5271 ax-pow 5338 ax-pr 5406 ax-un 7742 ax-inf2 9617 ax-cnex 11171 ax-resscn 11172 ax-1cn 11173 ax-icn 11174 ax-addcl 11175 ax-addrcl 11176 ax-mulcl 11177 ax-mulrcl 11178 ax-mulcom 11179 ax-addass 11180 ax-mulass 11181 ax-distr 11182 ax-i2m1 11183 ax-1ne0 11184 ax-1rid 11185 ax-rnegex 11186 ax-rrecex 11187 ax-cnre 11188 ax-pre-lttri 11189 ax-pre-lttrn 11190 ax-pre-ltadd 11191 ax-pre-mulgt0 11192 ax-pre-sup 11193 |
| 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 2569 df-eu 2599 df-clab 2744 df-cleq 2757 df-clel 2840 df-nfc 2914 df-ne 2961 df-nel 3067 df-ral 3082 df-rex 3092 df-rmo 3371 df-reu 3372 df-rab 3419 df-v 3459 df-sbc 3747 df-csb 3855 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-pss 3926 df-nul 4287 df-if 4490 df-pw 4566 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4875 df-int 4915 df-iun 4960 df-br 5112 df-opab 5176 df-mpt 5195 df-tr 5221 df-id 5558 df-eprel 5563 df-po 5571 df-so 5572 df-fr 5616 df-se 5617 df-we 5618 df-xp 5669 df-rel 5670 df-cnv 5671 df-co 5672 df-dm 5673 df-rn 5674 df-res 5675 df-ima 5676 df-pred 6306 df-ord 6367 df-on 6368 df-lim 6369 df-suc 6370 df-iota 6496 df-fun 6542 df-fn 6543 df-f 6544 df-f1 6545 df-fo 6546 df-f1o 6547 df-fv 6548 df-isom 6549 df-riota 7376 df-ov 7422 df-oprab 7423 df-mpo 7424 df-om 7869 df-1st 7992 df-2nd 7993 df-frecs 8284 df-wrecs 8315 df-recs 8364 df-rdg 8403 df-1o 8459 df-2o 8460 df-er 8700 df-en 8950 df-dom 8951 df-sdom 8952 df-fin 8953 df-sup 9409 df-oi 9479 df-card 9941 df-pnf 11260 df-mnf 11261 df-xr 11262 df-ltxr 11263 df-le 11264 df-sub 11458 df-neg 11459 df-div 11887 df-nn 12249 df-2 12318 df-3 12319 df-n0 12520 df-z 12607 df-uz 12879 df-rp 13033 df-xadd 13154 df-ico 13394 df-icc 13395 df-fz 13552 df-fzo 13700 df-seq 14056 df-exp 14116 df-hash 14385 df-cj 15174 df-re 15175 df-im 15176 df-sqrt 15310 df-abs 15311 df-clim 15563 df-sum 15762 df-sumge0 47135 df-ome 47262 |
| This theorem is used by: carageniuncl 47295 caragenel2d 47304 |
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