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Theorem djulf1or 7058
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):𝐴1-1-onto→({∅} × 𝐴)

Proof of Theorem djulf1or
Dummy variable 𝑥 is distinct from all other variables.
StepHypRef Expression
1 0ex 4132 . 2 ∅ ∈ V
2 df-inl 7049 . 2 inl = (𝑥 ∈ V ↦ ⟨∅, 𝑥⟩)
31, 2djuf1olemr 7056 1 (inl ↾ 𝐴):𝐴1-1-onto→({∅} × 𝐴)
Colors of variables: wff set class
Syntax hints:  c0 3424  {csn 3594   × cxp 4626  cres 4630  1-1-ontowf1o 5217  inlcinl 7047
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-in1 614  ax-in2 615  ax-io 709  ax-5 1447  ax-7 1448  ax-gen 1449  ax-ie1 1493  ax-ie2 1494  ax-8 1504  ax-10 1505  ax-11 1506  ax-i12 1507  ax-bndl 1509  ax-4 1510  ax-17 1526  ax-i9 1530  ax-ial 1534  ax-i5r 1535  ax-13 2150  ax-14 2151  ax-ext 2159  ax-sep 4123  ax-nul 4131  ax-pow 4176  ax-pr 4211  ax-un 4435
This theorem depends on definitions:  df-bi 117  df-3an 980  df-tru 1356  df-nf 1461  df-sb 1763  df-eu 2029  df-mo 2030  df-clab 2164  df-cleq 2170  df-clel 2173  df-nfc 2308  df-ral 2460  df-rex 2461  df-v 2741  df-sbc 2965  df-dif 3133  df-un 3135  df-in 3137  df-ss 3144  df-nul 3425  df-pw 3579  df-sn 3600  df-pr 3601  df-op 3603  df-uni 3812  df-br 4006  df-opab 4067  df-mpt 4068  df-id 4295  df-xp 4634  df-rel 4635  df-cnv 4636  df-co 4637  df-dm 4638  df-rn 4639  df-res 4640  df-iota 5180  df-fun 5220  df-fn 5221  df-f 5222  df-f1 5223  df-fo 5224  df-f1o 5225  df-fv 5226  df-1st 6144  df-2nd 6145  df-inl 7049
This theorem is referenced by:  inlresf1  7063  djuinr  7065  djuunr  7068  eldju  7070  eninl  7099
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