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Theorem djuf1olemr 6939
Description: Lemma for djulf1or 6941 and djurf1or 6942. For a version of this lemma with  F defined on  A and no restriction in the conclusion, see djuf1olem 6938. (Contributed by BJ and Jim Kingdon, 4-Jul-2022.)
Hypotheses
Ref Expression
djuf1olemr.1  |-  X  e. 
_V
djuf1olemr.2  |-  F  =  ( x  e.  _V  |->  <. X ,  x >. )
Assertion
Ref Expression
djuf1olemr  |-  ( F  |`  A ) : A -1-1-onto-> ( { X }  X.  A
)
Distinct variable groups:    x, X    x, A
Allowed substitution hint:    F( x)

Proof of Theorem djuf1olemr
StepHypRef Expression
1 djuf1olemr.1 . 2  |-  X  e. 
_V
2 djuf1olemr.2 . . . 4  |-  F  =  ( x  e.  _V  |->  <. X ,  x >. )
32reseq1i 4815 . . 3  |-  ( F  |`  A )  =  ( ( x  e.  _V  |->  <. X ,  x >. )  |`  A )
4 ssv 3119 . . . 4  |-  A  C_  _V
5 resmpt 4867 . . . 4  |-  ( A 
C_  _V  ->  ( ( x  e.  _V  |->  <. X ,  x >. )  |`  A )  =  ( x  e.  A  |->  <. X ,  x >. ) )
64, 5ax-mp 5 . . 3  |-  ( ( x  e.  _V  |->  <. X ,  x >. )  |`  A )  =  ( x  e.  A  |->  <. X ,  x >. )
73, 6eqtri 2160 . 2  |-  ( F  |`  A )  =  ( x  e.  A  |->  <. X ,  x >. )
81, 7djuf1olem 6938 1  |-  ( F  |`  A ) : A -1-1-onto-> ( { X }  X.  A
)
Colors of variables: wff set class
Syntax hints:    = wceq 1331    e. wcel 1480   _Vcvv 2686    C_ wss 3071   {csn 3527   <.cop 3530    |-> cmpt 3989    X. cxp 4537    |` cres 4541   -1-1-onto->wf1o 5122
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
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-v 2688  df-sbc 2910  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-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-iota 5088  df-fun 5125  df-fn 5126  df-f 5127  df-f1 5128  df-fo 5129  df-f1o 5130  df-fv 5131  df-1st 6038  df-2nd 6039
This theorem is referenced by:  djulf1or  6941  djurf1or  6942
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