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Theorem 0nelfun 5372
Description: A function does not contain the empty set. (Contributed by BJ, 26-Nov-2021.)
Assertion
Ref Expression
0nelfun  |-  ( Fun 
R  ->  (/)  e/  R
)

Proof of Theorem 0nelfun
StepHypRef Expression
1 funrel 5371 . 2  |-  ( Fun 
R  ->  Rel  R )
2 0nelrel 4798 . 2  |-  ( Rel 
R  ->  (/)  e/  R
)
31, 2syl 14 1  |-  ( Fun 
R  ->  (/)  e/  R
)
Colors of variables: wff set class
Syntax hints:    -> wi 4    e/ wnel 2509   (/)c0 3510   Rel wrel 4756   Fun wfun 5348
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-in1 619  ax-in2 620  ax-io 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-14 2208  ax-ext 2216  ax-sep 4230  ax-pow 4289  ax-pr 4324
This theorem depends on definitions:  df-bi 117  df-3an 1007  df-tru 1401  df-fal 1404  df-nf 1510  df-sb 1812  df-clab 2221  df-cleq 2227  df-clel 2230  df-nfc 2375  df-ne 2415  df-nel 2510  df-v 2817  df-dif 3215  df-un 3217  df-in 3219  df-ss 3226  df-nul 3511  df-pw 3673  df-sn 3697  df-pr 3698  df-op 3700  df-opab 4174  df-xp 4757  df-rel 4758  df-fun 5356
This theorem is referenced by: (None)
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