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Theorem djulf1or 7021
Description: The left injection function on all sets is one to one and onto. (Contributed by BJ and Jim Kingdon, 22-Jun-2022.)
Assertion
Ref Expression
djulf1or  |-  (inl  |`  A ) : A -1-1-onto-> ( { (/) }  X.  A )

Proof of Theorem djulf1or
Dummy variable  x is distinct from all other variables.
StepHypRef Expression
1 0ex 4109 . 2  |-  (/)  e.  _V
2 df-inl 7012 . 2  |- inl  =  ( x  e.  _V  |->  <. (/)
,  x >. )
31, 2djuf1olemr 7019 1  |-  (inl  |`  A ) : A -1-1-onto-> ( { (/) }  X.  A )
Colors of variables: wff set class
Syntax hints:   (/)c0 3409   {csn 3576    X. cxp 4602    |` cres 4606   -1-1-onto->wf1o 5187  inlcinl 7010
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-in1 604  ax-in2 605  ax-io 699  ax-5 1435  ax-7 1436  ax-gen 1437  ax-ie1 1481  ax-ie2 1482  ax-8 1492  ax-10 1493  ax-11 1494  ax-i12 1495  ax-bndl 1497  ax-4 1498  ax-17 1514  ax-i9 1518  ax-ial 1522  ax-i5r 1523  ax-13 2138  ax-14 2139  ax-ext 2147  ax-sep 4100  ax-nul 4108  ax-pow 4153  ax-pr 4187  ax-un 4411
This theorem depends on definitions:  df-bi 116  df-3an 970  df-tru 1346  df-nf 1449  df-sb 1751  df-eu 2017  df-mo 2018  df-clab 2152  df-cleq 2158  df-clel 2161  df-nfc 2297  df-ral 2449  df-rex 2450  df-v 2728  df-sbc 2952  df-dif 3118  df-un 3120  df-in 3122  df-ss 3129  df-nul 3410  df-pw 3561  df-sn 3582  df-pr 3583  df-op 3585  df-uni 3790  df-br 3983  df-opab 4044  df-mpt 4045  df-id 4271  df-xp 4610  df-rel 4611  df-cnv 4612  df-co 4613  df-dm 4614  df-rn 4615  df-res 4616  df-iota 5153  df-fun 5190  df-fn 5191  df-f 5192  df-f1 5193  df-fo 5194  df-f1o 5195  df-fv 5196  df-1st 6108  df-2nd 6109  df-inl 7012
This theorem is referenced by:  inlresf1  7026  djuinr  7028  djuunr  7031  eldju  7033  eninl  7062
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