Theorem djuf1olemr 7384

Description: Lemma for djulf1or 7386 and djurf1or 7387. For a version of this lemma with F defined on A and no restriction in the conclusion, see djuf1olem 7383. (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

Step	Hyp	Ref	Expression
1		djuf1olemr.1	. 2 |- X e. _V
2		djuf1olemr.2	. . . 4 |- F = ( x e. _V |-> <. X , x >. )
3	2	reseq1i 5054	. . 3 |- ( F |` A ) = ( ( x e. _V |-> <. X , x >. ) |` A )
4		ssv 3270	. . . 4 |- A C_ _V
5		resmpt 5106	. . . 4 |- ( A C_ _V -> ( ( x e. _V |-> <. X , x >. ) |` A ) = ( x e. A |-> <. X , x >. ) )
6	4, 5	ax-mp 5	. . 3 |- ( ( x e. _V |-> <. X , x >. ) |` A ) = ( x e. A |-> <. X , x >. )
7	3, 6	eqtri 2259	. 2 |- ( F |` A ) = ( x e. A |-> <. X , x >. )
8	1, 7	djuf1olem 7383	1 |- ( F |` A ) : A -1-1-onto-> ( { X } X. A )

Syntax hints:   = wceq 1402   e. wcel 2209   _Vcvv 2821   C_ wss 3220   {csn 3705   <.cop 3708   |-> cmpt 4187   X. cxp 4767   |` cres 4771   -1-1-onto->wf1o 5371

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-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 4244  ax-pow 4306  ax-pr 4341  ax-un 4573

This theorem 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-v 2823  df-sbc 3052  df-un 3224  df-in 3226  df-ss 3233  df-pw 3687  df-sn 3711  df-pr 3712  df-op 3714  df-uni 3931  df-br 4126  df-opab 4188  df-mpt 4189  df-id 4433  df-xp 4775  df-rel 4776  df-cnv 4777  df-co 4778  df-dm 4779  df-rn 4780  df-res 4781  df-iota 5332  df-fun 5374  df-fn 5375  df-f 5376  df-f1 5377  df-fo 5378  df-f1o 5379  df-fv 5380  df-1st 6364  df-2nd 6365

This theorem is referenced by:  djulf1or  7386  djurf1or  7387