MPE Home Metamath Proof Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  MPE Home  >  Th. List  >  mblsplit Structured version   Unicode version

Theorem mblsplit 21015
Description: The defining property of measurability. (Contributed by Mario Carneiro, 17-Mar-2014.)
Assertion
Ref Expression
mblsplit  |-  ( ( A  e.  dom  vol  /\  B  C_  RR  /\  ( vol* `  B )  e.  RR )  -> 
( vol* `  B )  =  ( ( vol* `  ( B  i^i  A ) )  +  ( vol* `  ( B  \  A ) ) ) )

Proof of Theorem mblsplit
Dummy variable  x is distinct from all other variables.
StepHypRef Expression
1 reex 9373 . . . 4  |-  RR  e.  _V
21elpw2 4456 . . 3  |-  ( B  e.  ~P RR  <->  B  C_  RR )
3 ismbl 21009 . . . . 5  |-  ( A  e.  dom  vol  <->  ( A  C_  RR  /\  A. x  e.  ~P  RR ( ( vol* `  x
)  e.  RR  ->  ( vol* `  x
)  =  ( ( vol* `  (
x  i^i  A )
)  +  ( vol* `  ( x  \  A ) ) ) ) ) )
43simprbi 464 . . . 4  |-  ( A  e.  dom  vol  ->  A. x  e.  ~P  RR ( ( vol* `  x )  e.  RR  ->  ( vol* `  x )  =  ( ( vol* `  ( x  i^i  A ) )  +  ( vol* `  ( x  \  A ) ) ) ) )
5 fveq2 5691 . . . . . . 7  |-  ( x  =  B  ->  ( vol* `  x )  =  ( vol* `  B ) )
65eleq1d 2509 . . . . . 6  |-  ( x  =  B  ->  (
( vol* `  x )  e.  RR  <->  ( vol* `  B
)  e.  RR ) )
7 ineq1 3545 . . . . . . . . 9  |-  ( x  =  B  ->  (
x  i^i  A )  =  ( B  i^i  A ) )
87fveq2d 5695 . . . . . . . 8  |-  ( x  =  B  ->  ( vol* `  ( x  i^i  A ) )  =  ( vol* `  ( B  i^i  A
) ) )
9 difeq1 3467 . . . . . . . . 9  |-  ( x  =  B  ->  (
x  \  A )  =  ( B  \  A ) )
109fveq2d 5695 . . . . . . . 8  |-  ( x  =  B  ->  ( vol* `  ( x 
\  A ) )  =  ( vol* `  ( B  \  A
) ) )
118, 10oveq12d 6109 . . . . . . 7  |-  ( x  =  B  ->  (
( vol* `  ( x  i^i  A ) )  +  ( vol* `  ( x  \  A ) ) )  =  ( ( vol* `  ( B  i^i  A ) )  +  ( vol* `  ( B  \  A ) ) ) )
125, 11eqeq12d 2457 . . . . . 6  |-  ( x  =  B  ->  (
( vol* `  x )  =  ( ( vol* `  ( x  i^i  A ) )  +  ( vol* `  ( x  \  A ) ) )  <-> 
( vol* `  B )  =  ( ( vol* `  ( B  i^i  A ) )  +  ( vol* `  ( B  \  A ) ) ) ) )
136, 12imbi12d 320 . . . . 5  |-  ( x  =  B  ->  (
( ( vol* `  x )  e.  RR  ->  ( vol* `  x )  =  ( ( vol* `  ( x  i^i  A ) )  +  ( vol* `  ( x  \  A ) ) ) )  <->  ( ( vol* `  B )  e.  RR  ->  ( vol* `  B )  =  ( ( vol* `  ( B  i^i  A
) )  +  ( vol* `  ( B  \  A ) ) ) ) ) )
1413rspccv 3070 . . . 4  |-  ( A. x  e.  ~P  RR ( ( vol* `  x )  e.  RR  ->  ( vol* `  x )  =  ( ( vol* `  ( x  i^i  A ) )  +  ( vol* `  ( x  \  A ) ) ) )  ->  ( B  e.  ~P RR  ->  (
( vol* `  B )  e.  RR  ->  ( vol* `  B )  =  ( ( vol* `  ( B  i^i  A ) )  +  ( vol* `  ( B  \  A ) ) ) ) ) )
154, 14syl 16 . . 3  |-  ( A  e.  dom  vol  ->  ( B  e.  ~P RR  ->  ( ( vol* `  B )  e.  RR  ->  ( vol* `  B )  =  ( ( vol* `  ( B  i^i  A ) )  +  ( vol* `  ( B  \  A ) ) ) ) ) )
162, 15syl5bir 218 . 2  |-  ( A  e.  dom  vol  ->  ( B  C_  RR  ->  ( ( vol* `  B )  e.  RR  ->  ( vol* `  B )  =  ( ( vol* `  ( B  i^i  A ) )  +  ( vol* `  ( B  \  A ) ) ) ) ) )
17163imp 1181 1  |-  ( ( A  e.  dom  vol  /\  B  C_  RR  /\  ( vol* `  B )  e.  RR )  -> 
( vol* `  B )  =  ( ( vol* `  ( B  i^i  A ) )  +  ( vol* `  ( B  \  A ) ) ) )
Colors of variables: wff setvar class
Syntax hints:    -> wi 4    /\ w3a 965    = wceq 1369    e. wcel 1756   A.wral 2715    \ cdif 3325    i^i cin 3327    C_ wss 3328   ~Pcpw 3860   dom cdm 4840   ` cfv 5418  (class class class)co 6091   RRcr 9281    + caddc 9285   vol*covol 20946   volcvol 20947
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1591  ax-4 1602  ax-5 1670  ax-6 1708  ax-7 1728  ax-8 1758  ax-9 1760  ax-10 1775  ax-11 1780  ax-12 1792  ax-13 1943  ax-ext 2423  ax-sep 4413  ax-nul 4421  ax-pow 4470  ax-pr 4531  ax-un 6372  ax-cnex 9338  ax-resscn 9339  ax-1cn 9340  ax-icn 9341  ax-addcl 9342  ax-addrcl 9343  ax-mulcl 9344  ax-mulrcl 9345  ax-mulcom 9346  ax-addass 9347  ax-mulass 9348  ax-distr 9349  ax-i2m1 9350  ax-1ne0 9351  ax-1rid 9352  ax-rnegex 9353  ax-rrecex 9354  ax-cnre 9355  ax-pre-lttri 9356  ax-pre-lttrn 9357  ax-pre-ltadd 9358  ax-pre-mulgt0 9359  ax-pre-sup 9360
This theorem depends on definitions:  df-bi 185  df-or 370  df-an 371  df-3or 966  df-3an 967  df-tru 1372  df-ex 1587  df-nf 1590  df-sb 1701  df-eu 2257  df-mo 2258  df-clab 2430  df-cleq 2436  df-clel 2439  df-nfc 2568  df-ne 2608  df-nel 2609  df-ral 2720  df-rex 2721  df-reu 2722  df-rmo 2723  df-rab 2724  df-v 2974  df-sbc 3187  df-csb 3289  df-dif 3331  df-un 3333  df-in 3335  df-ss 3342  df-pss 3344  df-nul 3638  df-if 3792  df-pw 3862  df-sn 3878  df-pr 3880  df-tp 3882  df-op 3884  df-uni 4092  df-iun 4173  df-br 4293  df-opab 4351  df-mpt 4352  df-tr 4386  df-eprel 4632  df-id 4636  df-po 4641  df-so 4642  df-fr 4679  df-we 4681  df-ord 4722  df-on 4723  df-lim 4724  df-suc 4725  df-xp 4846  df-rel 4847  df-cnv 4848  df-co 4849  df-dm 4850  df-rn 4851  df-res 4852  df-ima 4853  df-iota 5381  df-fun 5420  df-fn 5421  df-f 5422  df-f1 5423  df-fo 5424  df-f1o 5425  df-fv 5426  df-riota 6052  df-ov 6094  df-oprab 6095  df-mpt2 6096  df-om 6477  df-1st 6577  df-2nd 6578  df-recs 6832  df-rdg 6866  df-er 7101  df-map 7216  df-en 7311  df-dom 7312  df-sdom 7313  df-sup 7691  df-pnf 9420  df-mnf 9421  df-xr 9422  df-ltxr 9423  df-le 9424  df-sub 9597  df-neg 9598  df-div 9994  df-nn 10323  df-2 10380  df-3 10381  df-n0 10580  df-z 10647  df-uz 10862  df-rp 10992  df-ico 11306  df-icc 11307  df-fz 11438  df-seq 11807  df-exp 11866  df-cj 12588  df-re 12589  df-im 12590  df-sqr 12724  df-abs 12725  df-ovol 20948  df-vol 20949
This theorem is referenced by:  cmmbl  21016  nulmbl2  21018  unmbl  21019  shftmbl  21020  volun  21026  voliunlem1  21031  uniioombllem4  21066  uniioombllem5  21067  mblfinlem3  28430  mblfinlem4  28431
  Copyright terms: Public domain W3C validator