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Theorem inlresf1 7122
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 ) : A -1-1-> ( A B )

Proof of Theorem inlresf1
Dummy variable  x is distinct from all other variables.
StepHypRef Expression
1 djulf1or 7117 . 2  |-  (inl  |`  A ) : A -1-1-onto-> ( { (/) }  X.  A )
2 djulclr 7110 . 2  |-  ( x  e.  A  ->  (
(inl  |`  A ) `  x )  e.  ( A B ) )
31, 2inresflem 7121 1  |-  (inl  |`  A ) : A -1-1-> ( A B )
Colors of variables: wff set class
Syntax hints:   (/)c0 3447    |` cres 4662   -1-1->wf1 5252   ⊔ cdju 7098  inlcinl 7106
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 615  ax-in2 616  ax-io 710  ax-5 1458  ax-7 1459  ax-gen 1460  ax-ie1 1504  ax-ie2 1505  ax-8 1515  ax-10 1516  ax-11 1517  ax-i12 1518  ax-bndl 1520  ax-4 1521  ax-17 1537  ax-i9 1541  ax-ial 1545  ax-i5r 1546  ax-13 2166  ax-14 2167  ax-ext 2175  ax-sep 4148  ax-nul 4156  ax-pow 4204  ax-pr 4239  ax-un 4465
This theorem depends on definitions:  df-bi 117  df-3an 982  df-tru 1367  df-nf 1472  df-sb 1774  df-eu 2045  df-mo 2046  df-clab 2180  df-cleq 2186  df-clel 2189  df-nfc 2325  df-ral 2477  df-rex 2478  df-v 2762  df-sbc 2987  df-dif 3156  df-un 3158  df-in 3160  df-ss 3167  df-nul 3448  df-pw 3604  df-sn 3625  df-pr 3626  df-op 3628  df-uni 3837  df-br 4031  df-opab 4092  df-mpt 4093  df-id 4325  df-xp 4666  df-rel 4667  df-cnv 4668  df-co 4669  df-dm 4670  df-rn 4671  df-res 4672  df-iota 5216  df-fun 5257  df-fn 5258  df-f 5259  df-f1 5260  df-fo 5261  df-f1o 5262  df-fv 5263  df-1st 6195  df-2nd 6196  df-dju 7099  df-inl 7108
This theorem is referenced by:  updjudhcoinlf  7141  updjud  7143  caserel  7148  djudom  7154  difinfsn  7161  djufun  7165  djuinj  7167  djudoml  7281
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