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Theorem ixxssxr 9683
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 5968 . . 3  |-  ( x  e.  ( A O B )  ->  ( A  e.  RR*  /\  B  e.  RR* ) )
31ixxf 9681 . . . . . 6  |-  O :
( RR*  X.  RR* ) --> ~P RR*
43fovcl 5876 . . . . 5  |-  ( ( A  e.  RR*  /\  B  e.  RR* )  ->  ( A O B )  e. 
~P RR* )
54elpwid 3521 . . . 4  |-  ( ( A  e.  RR*  /\  B  e.  RR* )  ->  ( A O B )  C_  RR* )
65sseld 3096 . . 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 3101 1  |-  ( A O B )  C_  RR*
Colors of variables: wff set class
Syntax hints:    /\ wa 103    = wceq 1331    e. wcel 1480   {crab 2420    C_ wss 3071   ~Pcpw 3510   class class class wbr 3929  (class class class)co 5774    e. cmpo 5776   RR*cxr 7799
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-io 698  ax-5 1423  ax-7 1424  ax-gen 1425  ax-ie1 1469  ax-ie2 1470  ax-8 1482  ax-10 1483  ax-11 1484  ax-i12 1485  ax-bndl 1486  ax-4 1487  ax-13 1491  ax-14 1492  ax-17 1506  ax-i9 1510  ax-ial 1514  ax-i5r 1515  ax-ext 2121  ax-sep 4046  ax-pow 4098  ax-pr 4131  ax-un 4355  ax-cnex 7711  ax-resscn 7712
This theorem depends on definitions:  df-bi 116  df-3an 964  df-tru 1334  df-nf 1437  df-sb 1736  df-eu 2002  df-mo 2003  df-clab 2126  df-cleq 2132  df-clel 2135  df-nfc 2270  df-ral 2421  df-rex 2422  df-rab 2425  df-v 2688  df-sbc 2910  df-csb 3004  df-un 3075  df-in 3077  df-ss 3084  df-pw 3512  df-sn 3533  df-pr 3534  df-op 3536  df-uni 3737  df-iun 3815  df-br 3930  df-opab 3990  df-mpt 3991  df-id 4215  df-xp 4545  df-rel 4546  df-cnv 4547  df-co 4548  df-dm 4549  df-rn 4550  df-res 4551  df-ima 4552  df-iota 5088  df-fun 5125  df-fn 5126  df-f 5127  df-fv 5131  df-ov 5777  df-oprab 5778  df-mpo 5779  df-1st 6038  df-2nd 6039  df-pnf 7802  df-mnf 7803  df-xr 7804
This theorem is referenced by:  iccssxr  9739  iocssxr  9740  icossxr  9741
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