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Theorem ecinxp 6347
Description: Restrict the relation in an equivalence class to a base set. (Contributed by Mario Carneiro, 10-Jul-2015.)
Assertion
Ref Expression
ecinxp  |-  ( ( ( R " A
)  C_  A  /\  B  e.  A )  ->  [ B ] R  =  [ B ] ( R  i^i  ( A  X.  A ) ) )

Proof of Theorem ecinxp
StepHypRef Expression
1 simpr 108 . . . . . . . 8  |-  ( ( ( R " A
)  C_  A  /\  B  e.  A )  ->  B  e.  A )
21snssd 3577 . . . . . . 7  |-  ( ( ( R " A
)  C_  A  /\  B  e.  A )  ->  { B }  C_  A )
3 df-ss 3010 . . . . . . 7  |-  ( { B }  C_  A  <->  ( { B }  i^i  A )  =  { B } )
42, 3sylib 120 . . . . . 6  |-  ( ( ( R " A
)  C_  A  /\  B  e.  A )  ->  ( { B }  i^i  A )  =  { B } )
54imaeq2d 4761 . . . . 5  |-  ( ( ( R " A
)  C_  A  /\  B  e.  A )  ->  ( R " ( { B }  i^i  A
) )  =  ( R " { B } ) )
65ineq1d 3198 . . . 4  |-  ( ( ( R " A
)  C_  A  /\  B  e.  A )  ->  ( ( R "
( { B }  i^i  A ) )  i^i 
A )  =  ( ( R " { B } )  i^i  A
) )
7 imass2 4795 . . . . . . 7  |-  ( { B }  C_  A  ->  ( R " { B } )  C_  ( R " A ) )
82, 7syl 14 . . . . . 6  |-  ( ( ( R " A
)  C_  A  /\  B  e.  A )  ->  ( R " { B } )  C_  ( R " A ) )
9 simpl 107 . . . . . 6  |-  ( ( ( R " A
)  C_  A  /\  B  e.  A )  ->  ( R " A
)  C_  A )
108, 9sstrd 3033 . . . . 5  |-  ( ( ( R " A
)  C_  A  /\  B  e.  A )  ->  ( R " { B } )  C_  A
)
11 df-ss 3010 . . . . 5  |-  ( ( R " { B } )  C_  A  <->  ( ( R " { B } )  i^i  A
)  =  ( R
" { B }
) )
1210, 11sylib 120 . . . 4  |-  ( ( ( R " A
)  C_  A  /\  B  e.  A )  ->  ( ( R " { B } )  i^i 
A )  =  ( R " { B } ) )
136, 12eqtr2d 2121 . . 3  |-  ( ( ( R " A
)  C_  A  /\  B  e.  A )  ->  ( R " { B } )  =  ( ( R " ( { B }  i^i  A
) )  i^i  A
) )
14 imainrect 4863 . . 3  |-  ( ( R  i^i  ( A  X.  A ) )
" { B }
)  =  ( ( R " ( { B }  i^i  A
) )  i^i  A
)
1513, 14syl6eqr 2138 . 2  |-  ( ( ( R " A
)  C_  A  /\  B  e.  A )  ->  ( R " { B } )  =  ( ( R  i^i  ( A  X.  A ) )
" { B }
) )
16 df-ec 6274 . 2  |-  [ B ] R  =  ( R " { B }
)
17 df-ec 6274 . 2  |-  [ B ] ( R  i^i  ( A  X.  A
) )  =  ( ( R  i^i  ( A  X.  A ) )
" { B }
)
1815, 16, 173eqtr4g 2145 1  |-  ( ( ( R " A
)  C_  A  /\  B  e.  A )  ->  [ B ] R  =  [ B ] ( R  i^i  ( A  X.  A ) ) )
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ wa 102    = wceq 1289    e. wcel 1438    i^i cin 2996    C_ wss 2997   {csn 3441    X. cxp 4426   "cima 4431   [cec 6270
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 104  ax-ia2 105  ax-ia3 106  ax-io 665  ax-5 1381  ax-7 1382  ax-gen 1383  ax-ie1 1427  ax-ie2 1428  ax-8 1440  ax-10 1441  ax-11 1442  ax-i12 1443  ax-bndl 1444  ax-4 1445  ax-14 1450  ax-17 1464  ax-i9 1468  ax-ial 1472  ax-i5r 1473  ax-ext 2070  ax-sep 3949  ax-pow 4001  ax-pr 4027
This theorem depends on definitions:  df-bi 115  df-3an 926  df-tru 1292  df-nf 1395  df-sb 1693  df-eu 1951  df-mo 1952  df-clab 2075  df-cleq 2081  df-clel 2084  df-nfc 2217  df-ral 2364  df-rex 2365  df-v 2621  df-un 3001  df-in 3003  df-ss 3010  df-pw 3427  df-sn 3447  df-pr 3448  df-op 3450  df-br 3838  df-opab 3892  df-xp 4434  df-rel 4435  df-cnv 4436  df-dm 4438  df-rn 4439  df-res 4440  df-ima 4441  df-ec 6274
This theorem is referenced by:  qsinxp  6348  nqnq0pi  6976
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