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Theorem inresflem 7119
Description: Lemma for inlresf1 7120 and inrresf1 7121. (Contributed by BJ, 4-Jul-2022.)
Hypotheses
Ref Expression
inresflem.1  |-  F : A
-1-1-onto-> ( { X }  X.  A )
inresflem.2  |-  ( x  e.  A  ->  ( F `  x )  e.  B )
Assertion
Ref Expression
inresflem  |-  F : A -1-1-> B
Distinct variable groups:    x, A    x, B    x, F
Allowed substitution hint:    X( x)

Proof of Theorem inresflem
StepHypRef Expression
1 inresflem.1 . . 3  |-  F : A
-1-1-onto-> ( { X }  X.  A )
2 f1of1 5499 . . 3  |-  ( F : A -1-1-onto-> ( { X }  X.  A )  ->  F : A -1-1-> ( { X }  X.  A ) )
31, 2ax-mp 5 . 2  |-  F : A -1-1-> ( { X }  X.  A )
4 f1ofn 5501 . . . 4  |-  ( F : A -1-1-onto-> ( { X }  X.  A )  ->  F  Fn  A )
51, 4ax-mp 5 . . 3  |-  F  Fn  A
6 inresflem.2 . . . . 5  |-  ( x  e.  A  ->  ( F `  x )  e.  B )
76rgen 2547 . . . 4  |-  A. x  e.  A  ( F `  x )  e.  B
8 fnfvrnss 5718 . . . 4  |-  ( ( F  Fn  A  /\  A. x  e.  A  ( F `  x )  e.  B )  ->  ran  F  C_  B )
95, 7, 8mp2an 426 . . 3  |-  ran  F  C_  B
10 df-f 5258 . . 3  |-  ( F : A --> B  <->  ( F  Fn  A  /\  ran  F  C_  B ) )
115, 9, 10mpbir2an 944 . 2  |-  F : A
--> B
12 f1ff1 5467 . 2  |-  ( ( F : A -1-1-> ( { X }  X.  A )  /\  F : A --> B )  ->  F : A -1-1-> B )
133, 11, 12mp2an 426 1  |-  F : A -1-1-> B
Colors of variables: wff set class
Syntax hints:    -> wi 4    e. wcel 2164   A.wral 2472    C_ wss 3153   {csn 3618    X. cxp 4657   ran crn 4660    Fn wfn 5249   -->wf 5250   -1-1->wf1 5251   -1-1-onto->wf1o 5253   ` cfv 5254
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-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-14 2167  ax-ext 2175  ax-sep 4147  ax-pow 4203  ax-pr 4238
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 2986  df-un 3157  df-in 3159  df-ss 3166  df-pw 3603  df-sn 3624  df-pr 3625  df-op 3627  df-uni 3836  df-br 4030  df-opab 4091  df-mpt 4092  df-id 4324  df-xp 4665  df-rel 4666  df-cnv 4667  df-co 4668  df-dm 4669  df-rn 4670  df-iota 5215  df-fun 5256  df-fn 5257  df-f 5258  df-f1 5259  df-f1o 5261  df-fv 5262
This theorem is referenced by:  inlresf1  7120  inrresf1  7121
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