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Theorem orvcoel 30523
Description: If the relation produces open sets, preimage maps by a measurable function are measurable sets. (Contributed by Thierry Arnoux, 21-Jan-2017.)
Hypotheses
Ref Expression
orvccel.1  |-  ( ph  ->  S  e.  U. ran sigAlgebra )
orvccel.2  |-  ( ph  ->  J  e.  Top )
orvccel.3  |-  ( ph  ->  X  e.  ( SMblFnM (sigaGen `  J )
) )
orvccel.4  |-  ( ph  ->  A  e.  V )
orvcoel.5  |-  ( ph  ->  { y  e.  U. J  |  y R A }  e.  J
)
Assertion
Ref Expression
orvcoel  |-  ( ph  ->  ( XRV/𝑐 R A )  e.  S
)
Distinct variable groups:    y, A    y, R    y, X    y, J
Allowed substitution hints:    ph( y)    S( y)    V( y)

Proof of Theorem orvcoel
StepHypRef Expression
1 orvccel.1 . . 3  |-  ( ph  ->  S  e.  U. ran sigAlgebra )
2 orvccel.2 . . 3  |-  ( ph  ->  J  e.  Top )
3 orvccel.3 . . 3  |-  ( ph  ->  X  e.  ( SMblFnM (sigaGen `  J )
) )
4 orvccel.4 . . 3  |-  ( ph  ->  A  e.  V )
51, 2, 3, 4orvcval4 30522 . 2  |-  ( ph  ->  ( XRV/𝑐 R A )  =  ( `' X " { y  e.  U. J  | 
y R A }
) )
62sgsiga 30205 . . 3  |-  ( ph  ->  (sigaGen `  J )  e.  U. ran sigAlgebra )
7 sssigagen 30208 . . . . 5  |-  ( J  e.  Top  ->  J  C_  (sigaGen `  J )
)
82, 7syl 17 . . . 4  |-  ( ph  ->  J  C_  (sigaGen `  J
) )
9 orvcoel.5 . . . 4  |-  ( ph  ->  { y  e.  U. J  |  y R A }  e.  J
)
108, 9sseldd 3604 . . 3  |-  ( ph  ->  { y  e.  U. J  |  y R A }  e.  (sigaGen `  J ) )
111, 6, 3, 10mbfmcnvima 30319 . 2  |-  ( ph  ->  ( `' X " { y  e.  U. J  |  y R A } )  e.  S
)
125, 11eqeltrd 2701 1  |-  ( ph  ->  ( XRV/𝑐 R A )  e.  S
)
Colors of variables: wff setvar class
Syntax hints:    -> wi 4    e. wcel 1990   {crab 2916    C_ wss 3574   U.cuni 4436   class class class wbr 4653   `'ccnv 5113   ran crn 5115   "cima 5117   ` cfv 5888  (class class class)co 6650   Topctop 20698  sigAlgebracsiga 30170  sigaGencsigagen 30201  MblFnMcmbfm 30312  ∘RV/𝑐corvc 30517
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1722  ax-4 1737  ax-5 1839  ax-6 1888  ax-7 1935  ax-8 1992  ax-9 1999  ax-10 2019  ax-11 2034  ax-12 2047  ax-13 2246  ax-ext 2602  ax-sep 4781  ax-nul 4789  ax-pow 4843  ax-pr 4906  ax-un 6949
This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3an 1039  df-tru 1486  df-fal 1489  df-ex 1705  df-nf 1710  df-sb 1881  df-eu 2474  df-mo 2475  df-clab 2609  df-cleq 2615  df-clel 2618  df-nfc 2753  df-ne 2795  df-ral 2917  df-rex 2918  df-rab 2921  df-v 3202  df-sbc 3436  df-csb 3534  df-dif 3577  df-un 3579  df-in 3581  df-ss 3588  df-nul 3916  df-if 4087  df-pw 4160  df-sn 4178  df-pr 4180  df-op 4184  df-uni 4437  df-int 4476  df-iun 4522  df-br 4654  df-opab 4713  df-mpt 4730  df-id 5024  df-xp 5120  df-rel 5121  df-cnv 5122  df-co 5123  df-dm 5124  df-rn 5125  df-res 5126  df-ima 5127  df-iota 5851  df-fun 5890  df-fn 5891  df-f 5892  df-fo 5894  df-fv 5896  df-ov 6653  df-oprab 6654  df-mpt2 6655  df-1st 7168  df-2nd 7169  df-map 7859  df-siga 30171  df-sigagen 30202  df-mbfm 30313  df-orvc 30518
This theorem is referenced by:  orrvcoel  30527
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