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Theorem f10d 6170
Description: The empty set maps one-to-one into any class, deduction version. (Contributed by AV, 25-Nov-2020.)
Hypothesis
Ref Expression
f10d.f  |-  ( ph  ->  F  =  (/) )
Assertion
Ref Expression
f10d  |-  ( ph  ->  F : dom  F -1-1-> A )

Proof of Theorem f10d
StepHypRef Expression
1 f10 6169 . . 3  |-  (/) : (/) -1-1-> A
2 dm0 5339 . . . 4  |-  dom  (/)  =  (/)
3 f1eq2 6097 . . . 4  |-  ( dom  (/)  =  (/)  ->  ( (/) : dom  (/) -1-1-> A  <->  (/) : (/) -1-1-> A ) )
42, 3ax-mp 5 . . 3  |-  ( (/) : dom  (/) -1-1-> A  <->  (/) : (/) -1-1-> A )
51, 4mpbir 221 . 2  |-  (/) : dom  (/) -1-1->
A
6 f10d.f . . 3  |-  ( ph  ->  F  =  (/) )
76dmeqd 5326 . . 3  |-  ( ph  ->  dom  F  =  dom  (/) )
8 eqidd 2623 . . 3  |-  ( ph  ->  A  =  A )
96, 7, 8f1eq123d 6131 . 2  |-  ( ph  ->  ( F : dom  F
-1-1-> A  <->  (/) : dom  (/) -1-1-> A ) )
105, 9mpbiri 248 1  |-  ( ph  ->  F : dom  F -1-1-> A )
Colors of variables: wff setvar class
Syntax hints:    -> wi 4    <-> wb 196    = wceq 1483   (/)c0 3915   dom cdm 5114   -1-1->wf1 5885
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1722  ax-4 1737  ax-5 1839  ax-6 1888  ax-7 1935  ax-9 1999  ax-10 2019  ax-11 2034  ax-12 2047  ax-13 2246  ax-ext 2602  ax-sep 4781  ax-nul 4789  ax-pr 4906
This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3an 1039  df-tru 1486  df-ex 1705  df-nf 1710  df-sb 1881  df-eu 2474  df-mo 2475  df-clab 2609  df-cleq 2615  df-clel 2618  df-nfc 2753  df-ral 2917  df-rex 2918  df-rab 2921  df-v 3202  df-dif 3577  df-un 3579  df-in 3581  df-ss 3588  df-nul 3916  df-if 4087  df-sn 4178  df-pr 4180  df-op 4184  df-br 4654  df-opab 4713  df-id 5024  df-xp 5120  df-rel 5121  df-cnv 5122  df-co 5123  df-dm 5124  df-rn 5125  df-fun 5890  df-fn 5891  df-f 5892  df-f1 5893
This theorem is referenced by:  umgr0e  26005  usgr0e  26128
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