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Theorem supp0 6478
Description: The support of the empty set is the empty set. (Contributed by AV, 12-Apr-2019.)
Assertion
Ref Expression
supp0  |-  ( Z  e.  W  ->  ( (/) supp  Z )  =  (/) )

Proof of Theorem supp0
Dummy variable  i is distinct from all other variables.
StepHypRef Expression
1 0ex 4260 . . 3  |-  (/)  e.  _V
2 suppval 6477 . . 3  |-  ( (
(/)  e.  _V  /\  Z  e.  W )  ->  ( (/) supp  Z )  =  {
i  e.  dom  (/)  |  (
(/) " { i } )  =/=  { Z } } )
31, 2mpan 428 . 2  |-  ( Z  e.  W  ->  ( (/) supp  Z )  =  {
i  e.  dom  (/)  |  (
(/) " { i } )  =/=  { Z } } )
4 dm0 4995 . . 3  |-  dom  (/)  =  (/)
5 rabeq 2813 . . 3  |-  ( dom  (/)  =  (/)  ->  { i  e.  dom  (/)  |  (
(/) " { i } )  =/=  { Z } }  =  {
i  e.  (/)  |  (
(/) " { i } )  =/=  { Z } } )
64, 5mp1i 10 . 2  |-  ( Z  e.  W  ->  { i  e.  dom  (/)  |  (
(/) " { i } )  =/=  { Z } }  =  {
i  e.  (/)  |  (
(/) " { i } )  =/=  { Z } } )
7 rab0 3551 . . 3  |-  { i  e.  (/)  |  ( (/) " { i } )  =/=  { Z } }  =  (/)
87a1i 9 . 2  |-  ( Z  e.  W  ->  { i  e.  (/)  |  ( (/) " { i } )  =/=  { Z } }  =  (/) )
93, 6, 83eqtrd 2275 1  |-  ( Z  e.  W  ->  ( (/) supp  Z )  =  (/) )
Colors of variables:    wff set class
This proof depends on syntax axioms:    -> wi 4    = wceq 1402    e. wcel 2209    =/= wne 2420   {crab 2532   _Vcvv 2821   (/)c0 3520   {csn 3709   dom cdm 4774   "cima 4777  (class class class)co 6085   supp csupp 6475
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 623  ax-in2 624  ax-io 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-14 2212  ax-ext 2220  ax-sep 4249  ax-nul 4259  ax-pow 4311  ax-pr 4346  ax-un 4578  ax-setind 4684
This proof depends on definitions:  df-bi 117  df-3an 1011  df-tru 1405  df-fal 1408  df-nf 1514  df-sb 1816  df-eu 2089  df-mo 2090  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-ne 2421  df-ral 2533  df-rex 2534  df-rab 2537  df-v 2823  df-sbc 3052  df-dif 3222  df-un 3224  df-in 3226  df-ss 3233  df-nul 3521  df-pw 3690  df-sn 3715  df-pr 3716  df-op 3718  df-uni 3936  df-br 4131  df-opab 4193  df-id 4438  df-xp 4780  df-rel 4781  df-cnv 4782  df-co 4783  df-dm 4784  df-rn 4785  df-res 4786  df-ima 4787  df-iota 5337  df-fun 5379  df-fv 5385  df-ov 6088  df-oprab 6089  df-mpo 6090  df-supp 6476
This theorem is used by:  0fsupp  7298
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