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Theorem funcnvs1 14835
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 6542 . 2 Fun {⟨0, ( I ‘𝐴)⟩}
2 df-s1 14520 . . . 4 ⟨“𝐴”⟩ = {⟨0, ( I ‘𝐴)⟩}
32cnveqi 5823 . . 3 ⟨“𝐴”⟩ = {⟨0, ( I ‘𝐴)⟩}
43funeqi 6513 . 2 (Fun ⟨“𝐴”⟩ ↔ Fun {⟨0, ( I ‘𝐴)⟩})
51, 4mpbir 231 1 Fun ⟨“𝐴”⟩
Colors of variables: wff setvar class
Syntax hints:  {csn 4580  cop 4586   I cid 5518  ccnv 5623  Fun wfun 6486  cfv 6492  0cc0 11026  ⟨“cs1 14519
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1796  ax-4 1810  ax-5 1911  ax-6 1968  ax-7 2009  ax-8 2115  ax-9 2123  ax-ext 2708  ax-sep 5241  ax-nul 5251  ax-pr 5377
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1544  df-fal 1554  df-ex 1781  df-sb 2068  df-mo 2539  df-clab 2715  df-cleq 2728  df-clel 2811  df-ral 3052  df-rex 3061  df-rab 3400  df-v 3442  df-dif 3904  df-un 3906  df-ss 3918  df-nul 4286  df-if 4480  df-sn 4581  df-pr 4583  df-op 4587  df-br 5099  df-opab 5161  df-id 5519  df-xp 5630  df-rel 5631  df-cnv 5632  df-co 5633  df-fun 6494  df-s1 14520
This theorem is referenced by:  uhgrwkspthlem1  29826  1trld  30217
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