![]() |
Mathbox for Glauco Siliprandi |
< Previous
Next >
Nearby theorems |
|
Mirrors > Home > MPE Home > Th. List > Mathboxes > meassre | Structured version Visualization version GIF version |
Description: If the measure of a measurable set is real, then the measure of any of its measurable subsets is real. (Contributed by Glauco Siliprandi, 8-Apr-2021.) |
Ref | Expression |
---|---|
meassre.m | ⊢ (𝜑 → 𝑀 ∈ Meas) |
meassre.a | ⊢ (𝜑 → 𝐴 ∈ dom 𝑀) |
meassre.r | ⊢ (𝜑 → (𝑀‘𝐴) ∈ ℝ) |
meassre.s | ⊢ (𝜑 → 𝐵 ⊆ 𝐴) |
meassre.b | ⊢ (𝜑 → 𝐵 ∈ dom 𝑀) |
Ref | Expression |
---|---|
meassre | ⊢ (𝜑 → (𝑀‘𝐵) ∈ ℝ) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | rge0ssre 13493 | . 2 ⊢ (0[,)+∞) ⊆ ℝ | |
2 | 0xr 11306 | . . . 4 ⊢ 0 ∈ ℝ* | |
3 | 2 | a1i 11 | . . 3 ⊢ (𝜑 → 0 ∈ ℝ*) |
4 | pnfxr 11313 | . . . 4 ⊢ +∞ ∈ ℝ* | |
5 | 4 | a1i 11 | . . 3 ⊢ (𝜑 → +∞ ∈ ℝ*) |
6 | meassre.m | . . . 4 ⊢ (𝜑 → 𝑀 ∈ Meas) | |
7 | eqid 2735 | . . . 4 ⊢ dom 𝑀 = dom 𝑀 | |
8 | meassre.b | . . . 4 ⊢ (𝜑 → 𝐵 ∈ dom 𝑀) | |
9 | 6, 7, 8 | meaxrcl 46417 | . . 3 ⊢ (𝜑 → (𝑀‘𝐵) ∈ ℝ*) |
10 | 6, 8 | meage0 46431 | . . 3 ⊢ (𝜑 → 0 ≤ (𝑀‘𝐵)) |
11 | meassre.r | . . . . 5 ⊢ (𝜑 → (𝑀‘𝐴) ∈ ℝ) | |
12 | 11 | rexrd 11309 | . . . 4 ⊢ (𝜑 → (𝑀‘𝐴) ∈ ℝ*) |
13 | meassre.a | . . . . 5 ⊢ (𝜑 → 𝐴 ∈ dom 𝑀) | |
14 | meassre.s | . . . . 5 ⊢ (𝜑 → 𝐵 ⊆ 𝐴) | |
15 | 6, 7, 8, 13, 14 | meassle 46419 | . . . 4 ⊢ (𝜑 → (𝑀‘𝐵) ≤ (𝑀‘𝐴)) |
16 | 11 | ltpnfd 13161 | . . . 4 ⊢ (𝜑 → (𝑀‘𝐴) < +∞) |
17 | 9, 12, 5, 15, 16 | xrlelttrd 13199 | . . 3 ⊢ (𝜑 → (𝑀‘𝐵) < +∞) |
18 | 3, 5, 9, 10, 17 | elicod 13434 | . 2 ⊢ (𝜑 → (𝑀‘𝐵) ∈ (0[,)+∞)) |
19 | 1, 18 | sselid 3993 | 1 ⊢ (𝜑 → (𝑀‘𝐵) ∈ ℝ) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∈ wcel 2106 ⊆ wss 3963 dom cdm 5689 ‘cfv 6563 (class class class)co 7431 ℝcr 11152 0cc0 11153 +∞cpnf 11290 ℝ*cxr 11292 [,)cico 13386 Meascmea 46405 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1792 ax-4 1806 ax-5 1908 ax-6 1965 ax-7 2005 ax-8 2108 ax-9 2116 ax-10 2139 ax-11 2155 ax-12 2175 ax-ext 2706 ax-rep 5285 ax-sep 5302 ax-nul 5312 ax-pow 5371 ax-pr 5438 ax-un 7754 ax-inf2 9679 ax-cnex 11209 ax-resscn 11210 ax-1cn 11211 ax-icn 11212 ax-addcl 11213 ax-addrcl 11214 ax-mulcl 11215 ax-mulrcl 11216 ax-mulcom 11217 ax-addass 11218 ax-mulass 11219 ax-distr 11220 ax-i2m1 11221 ax-1ne0 11222 ax-1rid 11223 ax-rnegex 11224 ax-rrecex 11225 ax-cnre 11226 ax-pre-lttri 11227 ax-pre-lttrn 11228 ax-pre-ltadd 11229 ax-pre-mulgt0 11230 ax-pre-sup 11231 |
This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1540 df-fal 1550 df-ex 1777 df-nf 1781 df-sb 2063 df-mo 2538 df-eu 2567 df-clab 2713 df-cleq 2727 df-clel 2814 df-nfc 2890 df-ne 2939 df-nel 3045 df-ral 3060 df-rex 3069 df-rmo 3378 df-reu 3379 df-rab 3434 df-v 3480 df-sbc 3792 df-csb 3909 df-dif 3966 df-un 3968 df-in 3970 df-ss 3980 df-pss 3983 df-nul 4340 df-if 4532 df-pw 4607 df-sn 4632 df-pr 4634 df-op 4638 df-uni 4913 df-int 4952 df-iun 4998 df-disj 5116 df-br 5149 df-opab 5211 df-mpt 5232 df-tr 5266 df-id 5583 df-eprel 5589 df-po 5597 df-so 5598 df-fr 5641 df-se 5642 df-we 5643 df-xp 5695 df-rel 5696 df-cnv 5697 df-co 5698 df-dm 5699 df-rn 5700 df-res 5701 df-ima 5702 df-pred 6323 df-ord 6389 df-on 6390 df-lim 6391 df-suc 6392 df-iota 6516 df-fun 6565 df-fn 6566 df-f 6567 df-f1 6568 df-fo 6569 df-f1o 6570 df-fv 6571 df-isom 6572 df-riota 7388 df-ov 7434 df-oprab 7435 df-mpo 7436 df-om 7888 df-1st 8013 df-2nd 8014 df-frecs 8305 df-wrecs 8336 df-recs 8410 df-rdg 8449 df-1o 8505 df-2o 8506 df-er 8744 df-en 8985 df-dom 8986 df-sdom 8987 df-fin 8988 df-sup 9480 df-oi 9548 df-card 9977 df-pnf 11295 df-mnf 11296 df-xr 11297 df-ltxr 11298 df-le 11299 df-sub 11492 df-neg 11493 df-div 11919 df-nn 12265 df-2 12327 df-3 12328 df-n0 12525 df-z 12612 df-uz 12877 df-rp 13033 df-xadd 13153 df-ico 13390 df-icc 13391 df-fz 13545 df-fzo 13692 df-seq 14040 df-exp 14100 df-hash 14367 df-cj 15135 df-re 15136 df-im 15137 df-sqrt 15271 df-abs 15272 df-clim 15521 df-sum 15720 df-salg 46265 df-sumge0 46319 df-mea 46406 |
This theorem is referenced by: meadif 46435 meaiininclem 46442 vonioolem2 46637 |
Copyright terms: Public domain | W3C validator |