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Theorem ixxssxr 10302
Description: The set of intervals of extended reals maps to subsets of extended reals. (Contributed by Mario Carneiro, 4-Jul-2014.)
Hypothesis
Ref Expression
ixxssxr.1  |-  O  =  ( x  e.  RR* ,  y  e.  RR*  |->  { z  e.  RR*  |  (
x R z  /\  z S y ) } )
Assertion
Ref Expression
ixxssxr  |-  ( A O B )  C_  RR*
Distinct variable groups:    x, y, z, R    x, S, y, z    x, A, y, z    x, B, y, z    x, O, y, z

Proof of Theorem ixxssxr
StepHypRef Expression
1 ixxssxr.1 . . . 4  |-  O  =  ( x  e.  RR* ,  y  e.  RR*  |->  { z  e.  RR*  |  (
x R z  /\  z S y ) } )
21elmpocl 6284 . . 3  |-  ( x  e.  ( A O B )  ->  ( A  e.  RR*  /\  B  e.  RR* ) )
31ixxf 10300 . . . . . 6  |-  O :
( RR*  X.  RR* ) --> ~P RR*
43fovcl 6194 . . . . 5  |-  ( ( A  e.  RR*  /\  B  e.  RR* )  ->  ( A O B )  e. 
~P RR* )
54elpwid 3700 . . . 4  |-  ( ( A  e.  RR*  /\  B  e.  RR* )  ->  ( A O B )  C_  RR* )
65sseld 3247 . . 3  |-  ( ( A  e.  RR*  /\  B  e.  RR* )  ->  (
x  e.  ( A O B )  ->  x  e.  RR* ) )
72, 6mpcom 36 . 2  |-  ( x  e.  ( A O B )  ->  x  e.  RR* )
87ssriv 3252 1  |-  ( A O B )  C_  RR*
Colors of variables:    wff set class
This proof depends on syntax axioms:    /\ wa 104    = wceq 1402    e. wcel 2209   {crab 2532    C_ wss 3220   ~Pcpw 3688   class class class wbr 4130  (class class class)co 6085    e. cmpo 6087   RR*cxr 8359
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-io 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-14 2212  ax-ext 2220  ax-sep 4249  ax-pow 4311  ax-pr 4346  ax-un 4578  ax-cnex 8270  ax-resscn 8271
This proof depends on definitions:  df-bi 117  df-3an 1011  df-tru 1405  df-nf 1514  df-sb 1816  df-eu 2089  df-mo 2090  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-ral 2533  df-rex 2534  df-rab 2537  df-v 2823  df-sbc 3052  df-csb 3148  df-un 3224  df-in 3226  df-ss 3233  df-pw 3690  df-sn 3715  df-pr 3716  df-op 3718  df-uni 3936  df-iun 4014  df-br 4131  df-opab 4193  df-mpt 4194  df-id 4438  df-xp 4780  df-rel 4781  df-cnv 4782  df-co 4783  df-dm 4784  df-rn 4785  df-res 4786  df-ima 4787  df-iota 5337  df-fun 5379  df-fn 5380  df-f 5381  df-fv 5385  df-ov 6088  df-oprab 6089  df-mpo 6090  df-1st 6374  df-2nd 6375  df-pnf 8362  df-mnf 8363  df-xr 8364
This theorem is used by:  iccssxr  10358  iocssxr  10359  icossxr  10360
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