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Theorem funcnv0 6422
Description: The converse of the empty set is a function. (Contributed by AV, 7-Jan-2021.)
Assertion
Ref Expression
funcnv0 Fun

Proof of Theorem funcnv0
StepHypRef Expression
1 fun0 6421 . 2 Fun ∅
2 cnv0 6001 . . 3 ∅ = ∅
32funeqi 6378 . 2 (Fun ∅ ↔ Fun ∅)
41, 3mpbir 233 1 Fun
Colors of variables: wff setvar class
Syntax hints:  c0 4293  ccnv 5556  Fun wfun 6351
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 1970  ax-7 2015  ax-8 2116  ax-9 2124  ax-10 2145  ax-11 2161  ax-12 2177  ax-ext 2795  ax-sep 5205  ax-nul 5212  ax-pr 5332
This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3an 1085  df-tru 1540  df-ex 1781  df-nf 1785  df-sb 2070  df-mo 2622  df-eu 2654  df-clab 2802  df-cleq 2816  df-clel 2895  df-nfc 2965  df-ral 3145  df-rex 3146  df-rab 3149  df-v 3498  df-dif 3941  df-un 3943  df-in 3945  df-ss 3954  df-nul 4294  df-if 4470  df-sn 4570  df-pr 4572  df-op 4576  df-br 5069  df-opab 5131  df-id 5462  df-xp 5563  df-rel 5564  df-cnv 5565  df-co 5566  df-fun 6359
This theorem is referenced by:  f10  6649  pthdlem1  27549  0trl  27903  0pth  27906
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