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Theorem djulf1or 7254
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 4216 . 2 ∅ ∈ V
2 df-inl 7245 . 2 inl = (𝑥 ∈ V ↦ ⟨∅, 𝑥⟩)
31, 2djuf1olemr 7252 1 (inl ↾ 𝐴):𝐴1-1-onto→({∅} × 𝐴)
Colors of variables: wff set class
Syntax hints:  c0 3494  {csn 3669   × cxp 4723  cres 4727  1-1-ontowf1o 5325  inlcinl 7243
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 619  ax-in2 620  ax-io 716  ax-5 1495  ax-7 1496  ax-gen 1497  ax-ie1 1541  ax-ie2 1542  ax-8 1552  ax-10 1553  ax-11 1554  ax-i12 1555  ax-bndl 1557  ax-4 1558  ax-17 1574  ax-i9 1578  ax-ial 1582  ax-i5r 1583  ax-13 2204  ax-14 2205  ax-ext 2213  ax-sep 4207  ax-nul 4215  ax-pow 4264  ax-pr 4299  ax-un 4530
This theorem depends on definitions:  df-bi 117  df-3an 1006  df-tru 1400  df-nf 1509  df-sb 1811  df-eu 2082  df-mo 2083  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2363  df-ral 2515  df-rex 2516  df-v 2804  df-sbc 3032  df-dif 3202  df-un 3204  df-in 3206  df-ss 3213  df-nul 3495  df-pw 3654  df-sn 3675  df-pr 3676  df-op 3678  df-uni 3894  df-br 4089  df-opab 4151  df-mpt 4152  df-id 4390  df-xp 4731  df-rel 4732  df-cnv 4733  df-co 4734  df-dm 4735  df-rn 4736  df-res 4737  df-iota 5286  df-fun 5328  df-fn 5329  df-f 5330  df-f1 5331  df-fo 5332  df-f1o 5333  df-fv 5334  df-1st 6302  df-2nd 6303  df-inl 7245
This theorem is referenced by:  inlresf1  7259  djuinr  7261  djuunr  7264  eldju  7266  eninl  7295
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