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Theorem djulf1or 7219
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 4210 . 2 ∅ ∈ V
2 df-inl 7210 . 2 inl = (𝑥 ∈ V ↦ ⟨∅, 𝑥⟩)
31, 2djuf1olemr 7217 1 (inl ↾ 𝐴):𝐴1-1-onto→({∅} × 𝐴)
Colors of variables: wff set class
Syntax hints:  c0 3491  {csn 3666   × cxp 4716  cres 4720  1-1-ontowf1o 5316  inlcinl 7208
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 617  ax-in2 618  ax-io 714  ax-5 1493  ax-7 1494  ax-gen 1495  ax-ie1 1539  ax-ie2 1540  ax-8 1550  ax-10 1551  ax-11 1552  ax-i12 1553  ax-bndl 1555  ax-4 1556  ax-17 1572  ax-i9 1576  ax-ial 1580  ax-i5r 1581  ax-13 2202  ax-14 2203  ax-ext 2211  ax-sep 4201  ax-nul 4209  ax-pow 4257  ax-pr 4292  ax-un 4523
This theorem depends on definitions:  df-bi 117  df-3an 1004  df-tru 1398  df-nf 1507  df-sb 1809  df-eu 2080  df-mo 2081  df-clab 2216  df-cleq 2222  df-clel 2225  df-nfc 2361  df-ral 2513  df-rex 2514  df-v 2801  df-sbc 3029  df-dif 3199  df-un 3201  df-in 3203  df-ss 3210  df-nul 3492  df-pw 3651  df-sn 3672  df-pr 3673  df-op 3675  df-uni 3888  df-br 4083  df-opab 4145  df-mpt 4146  df-id 4383  df-xp 4724  df-rel 4725  df-cnv 4726  df-co 4727  df-dm 4728  df-rn 4729  df-res 4730  df-iota 5277  df-fun 5319  df-fn 5320  df-f 5321  df-f1 5322  df-fo 5323  df-f1o 5324  df-fv 5325  df-1st 6284  df-2nd 6285  df-inl 7210
This theorem is referenced by:  inlresf1  7224  djuinr  7226  djuunr  7229  eldju  7231  eninl  7260
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