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Theorem ixxval 9910
Description: Value of the interval function. (Contributed by Mario Carneiro, 3-Nov-2013.)
Hypothesis
Ref Expression
ixx.1  |-  O  =  ( x  e.  RR* ,  y  e.  RR*  |->  { z  e.  RR*  |  (
x R z  /\  z S y ) } )
Assertion
Ref Expression
ixxval  |-  ( ( A  e.  RR*  /\  B  e.  RR* )  ->  ( A O B )  =  { z  e.  RR*  |  ( A R z  /\  z S B ) } )
Distinct variable groups:    x, y, z, A    x, B, y, z    x, R, y, z    x, S, y, z
Allowed substitution hints:    O( x, y, z)

Proof of Theorem ixxval
StepHypRef Expression
1 breq1 4018 . . . 4  |-  ( x  =  A  ->  (
x R z  <->  A R
z ) )
21anbi1d 465 . . 3  |-  ( x  =  A  ->  (
( x R z  /\  z S y )  <->  ( A R z  /\  z S y ) ) )
32rabbidv 2738 . 2  |-  ( x  =  A  ->  { z  e.  RR*  |  (
x R z  /\  z S y ) }  =  { z  e. 
RR*  |  ( A R z  /\  z S y ) } )
4 breq2 4019 . . . 4  |-  ( y  =  B  ->  (
z S y  <->  z S B ) )
54anbi2d 464 . . 3  |-  ( y  =  B  ->  (
( A R z  /\  z S y )  <->  ( A R z  /\  z S B ) ) )
65rabbidv 2738 . 2  |-  ( y  =  B  ->  { z  e.  RR*  |  ( A R z  /\  z S y ) }  =  { z  e. 
RR*  |  ( A R z  /\  z S B ) } )
7 ixx.1 . 2  |-  O  =  ( x  e.  RR* ,  y  e.  RR*  |->  { z  e.  RR*  |  (
x R z  /\  z S y ) } )
8 xrex 9870 . . 3  |-  RR*  e.  _V
98rabex 4159 . 2  |-  { z  e.  RR*  |  ( A R z  /\  z S B ) }  e.  _V
103, 6, 7, 9ovmpo 6024 1  |-  ( ( A  e.  RR*  /\  B  e.  RR* )  ->  ( A O B )  =  { z  e.  RR*  |  ( A R z  /\  z S B ) } )
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ wa 104    = wceq 1363    e. wcel 2158   {crab 2469   class class class wbr 4015  (class class class)co 5888    e. cmpo 5890   RR*cxr 8005
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 615  ax-in2 616  ax-io 710  ax-5 1457  ax-7 1458  ax-gen 1459  ax-ie1 1503  ax-ie2 1504  ax-8 1514  ax-10 1515  ax-11 1516  ax-i12 1517  ax-bndl 1519  ax-4 1520  ax-17 1536  ax-i9 1540  ax-ial 1544  ax-i5r 1545  ax-13 2160  ax-14 2161  ax-ext 2169  ax-sep 4133  ax-pow 4186  ax-pr 4221  ax-un 4445  ax-setind 4548  ax-cnex 7916  ax-resscn 7917
This theorem depends on definitions:  df-bi 117  df-3an 981  df-tru 1366  df-fal 1369  df-nf 1471  df-sb 1773  df-eu 2039  df-mo 2040  df-clab 2174  df-cleq 2180  df-clel 2183  df-nfc 2318  df-ne 2358  df-ral 2470  df-rex 2471  df-rab 2474  df-v 2751  df-sbc 2975  df-dif 3143  df-un 3145  df-in 3147  df-ss 3154  df-pw 3589  df-sn 3610  df-pr 3611  df-op 3613  df-uni 3822  df-br 4016  df-opab 4077  df-id 4305  df-xp 4644  df-rel 4645  df-cnv 4646  df-co 4647  df-dm 4648  df-iota 5190  df-fun 5230  df-fv 5236  df-ov 5891  df-oprab 5892  df-mpo 5893  df-pnf 8008  df-mnf 8009  df-xr 8010
This theorem is referenced by:  elixx1  9911  iooval  9922  iocval  9932  icoval  9933  iccval  9934
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