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Theorem inlresf1 6954
Description: The left injection restricted to the left class of a disjoint union is an injective function from the left class into the disjoint union. (Contributed by AV, 28-Jun-2022.)
Assertion
Ref Expression
inlresf1 (inl ↾ 𝐴):𝐴1-1→(𝐴𝐵)

Proof of Theorem inlresf1
Dummy variable 𝑥 is distinct from all other variables.
StepHypRef Expression
1 djulf1or 6949 . 2 (inl ↾ 𝐴):𝐴1-1-onto→({∅} × 𝐴)
2 djulclr 6942 . 2 (𝑥𝐴 → ((inl ↾ 𝐴)‘𝑥) ∈ (𝐴𝐵))
31, 2inresflem 6953 1 (inl ↾ 𝐴):𝐴1-1→(𝐴𝐵)
Colors of variables: wff set class
Syntax hints:  c0 3368  cres 4549  1-1wf1 5128  cdju 6930  inlcinl 6938
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 1424  ax-7 1425  ax-gen 1426  ax-ie1 1470  ax-ie2 1471  ax-8 1483  ax-10 1484  ax-11 1485  ax-i12 1486  ax-bndl 1487  ax-4 1488  ax-13 1492  ax-14 1493  ax-17 1507  ax-i9 1511  ax-ial 1515  ax-i5r 1516  ax-ext 2122  ax-sep 4054  ax-nul 4062  ax-pow 4106  ax-pr 4139  ax-un 4363
This theorem depends on definitions:  df-bi 116  df-3an 965  df-tru 1335  df-nf 1438  df-sb 1737  df-eu 2003  df-mo 2004  df-clab 2127  df-cleq 2133  df-clel 2136  df-nfc 2271  df-ral 2422  df-rex 2423  df-v 2691  df-sbc 2914  df-dif 3078  df-un 3080  df-in 3082  df-ss 3089  df-nul 3369  df-pw 3517  df-sn 3538  df-pr 3539  df-op 3541  df-uni 3745  df-br 3938  df-opab 3998  df-mpt 3999  df-id 4223  df-xp 4553  df-rel 4554  df-cnv 4555  df-co 4556  df-dm 4557  df-rn 4558  df-res 4559  df-iota 5096  df-fun 5133  df-fn 5134  df-f 5135  df-f1 5136  df-fo 5137  df-f1o 5138  df-fv 5139  df-1st 6046  df-2nd 6047  df-dju 6931  df-inl 6940
This theorem is referenced by:  updjudhcoinlf  6973  updjud  6975  caserel  6980  djudom  6986  difinfsn  6993  djufun  6997  djuinj  6999  djudoml  7092
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