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Theorem inlresf1 6939
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 6934 . 2 (inl ↾ 𝐴):𝐴1-1-onto→({∅} × 𝐴)
2 djulclr 6927 . 2 (𝑥𝐴 → ((inl ↾ 𝐴)‘𝑥) ∈ (𝐴𝐵))
31, 2inresflem 6938 1 (inl ↾ 𝐴):𝐴1-1→(𝐴𝐵)
Colors of variables: wff set class
Syntax hints:  c0 3358  cres 4536  1-1wf1 5115  cdju 6915  inlcinl 6923
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 603  ax-in2 604  ax-io 698  ax-5 1423  ax-7 1424  ax-gen 1425  ax-ie1 1469  ax-ie2 1470  ax-8 1482  ax-10 1483  ax-11 1484  ax-i12 1485  ax-bndl 1486  ax-4 1487  ax-13 1491  ax-14 1492  ax-17 1506  ax-i9 1510  ax-ial 1514  ax-i5r 1515  ax-ext 2119  ax-sep 4041  ax-nul 4049  ax-pow 4093  ax-pr 4126  ax-un 4350
This theorem depends on definitions:  df-bi 116  df-3an 964  df-tru 1334  df-nf 1437  df-sb 1736  df-eu 2000  df-mo 2001  df-clab 2124  df-cleq 2130  df-clel 2133  df-nfc 2268  df-ral 2419  df-rex 2420  df-v 2683  df-sbc 2905  df-dif 3068  df-un 3070  df-in 3072  df-ss 3079  df-nul 3359  df-pw 3507  df-sn 3528  df-pr 3529  df-op 3531  df-uni 3732  df-br 3925  df-opab 3985  df-mpt 3986  df-id 4210  df-xp 4540  df-rel 4541  df-cnv 4542  df-co 4543  df-dm 4544  df-rn 4545  df-res 4546  df-iota 5083  df-fun 5120  df-fn 5121  df-f 5122  df-f1 5123  df-fo 5124  df-f1o 5125  df-fv 5126  df-1st 6031  df-2nd 6032  df-dju 6916  df-inl 6925
This theorem is referenced by:  updjudhcoinlf  6958  updjud  6960  caserel  6965  djudom  6971  difinfsn  6978  djufun  6982  djuinj  6984  djudoml  7068
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