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Theorem funcnvs1 15043
Description: The converse of a singleton word is a function. (Contributed by AV, 22-Jan-2021.)
Assertion
Ref Expression
funcnvs1 Fun ◡⟨“𝐴”⟩

Proof of Theorem funcnvs1
StepHypRef Expression
1 funcnvsn 6582 . 2 Fun ◡{⟨0, ( I ‘𝐴)⟩}
2 df-s1 14723 . . . 4 ⟨“𝐴”⟩ = {⟨0, ( I ‘𝐴)⟩}
32cnveqi 5852 . . 3 ◡⟨“𝐴”⟩ = ◡{⟨0, ( I ‘𝐴)⟩}
43funeqi 6552 . 2 (Fun ◡⟨“𝐴”⟩ ↔ Fun ◡{⟨0, ( I ‘𝐴)⟩})
51, 4mpbir 234 1 Fun ◡⟨“𝐴”⟩
Colors of variables:    wff setvar class
This proof depends on syntax axioms:  {csn 4584  ⟨cop 4590   I cid 5545  ◡ccnv 5650  Fun wfun 6525  ‘cfv 6531  0cc0 11181  ⟨“cs1 14722
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1828  ax-4 1842  ax-5 1943  ax-6 2000  ax-7 2041  ax-8 2147  ax-9 2155  ax-ext 2733  ax-sep 5249  ax-pr 5391
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1813  df-sb 2100  df-mo 2565  df-clab 2740  df-cleq 2753  df-clel 2836  df-ral 3078  df-rex 3088  df-rab 3414  df-v 3453  df-dif 3902  df-un 3904  df-in 3906  df-ss 3916  df-nul 4280  df-if 4483  df-sn 4585  df-pr 4587  df-op 4591  df-br 5104  df-opab 5168  df-id 5546  df-xp 5657  df-rel 5658  df-cnv 5659  df-co 5660  df-fun 6533  df-s1 14723
This theorem is used by:  uhgrwkspthlem1  30321  1trld  30715
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