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Theorem elsuppfn 6442
Description: An element of the support of a function with a given domain. (Contributed by AV, 27-May-2019.)
Assertion
Ref Expression
elsuppfn  |-  ( ( F  Fn  X  /\  X  e.  V  /\  Z  e.  W )  ->  ( S  e.  ( F supp  Z )  <->  ( S  e.  X  /\  ( F `  S )  =/=  Z ) ) )

Proof of Theorem elsuppfn
Dummy variable  i is distinct from all other variables.
StepHypRef Expression
1 suppvalfn 6440 . . 3  |-  ( ( F  Fn  X  /\  X  e.  V  /\  Z  e.  W )  ->  ( F supp  Z )  =  { i  e.  X  |  ( F `
 i )  =/= 
Z } )
21eleq2d 2302 . 2  |-  ( ( F  Fn  X  /\  X  e.  V  /\  Z  e.  W )  ->  ( S  e.  ( F supp  Z )  <->  S  e.  { i  e.  X  | 
( F `  i
)  =/=  Z }
) )
3 fveq2 5669 . . . 4  |-  ( i  =  S  ->  ( F `  i )  =  ( F `  S ) )
43neeq1d 2430 . . 3  |-  ( i  =  S  ->  (
( F `  i
)  =/=  Z  <->  ( F `  S )  =/=  Z
) )
54elrab 2972 . 2  |-  ( S  e.  { i  e.  X  |  ( F `
 i )  =/= 
Z }  <->  ( S  e.  X  /\  ( F `  S )  =/=  Z ) )
62, 5bitrdi 196 1  |-  ( ( F  Fn  X  /\  X  e.  V  /\  Z  e.  W )  ->  ( S  e.  ( F supp  Z )  <->  ( S  e.  X  /\  ( F `  S )  =/=  Z ) ) )
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ wa 104    <-> wb 105    /\ w3a 1005    = wceq 1398    e. wcel 2203    =/= wne 2412   {crab 2524    Fn wfn 5346   ` cfv 5351  (class class class)co 6049   supp csupp 6434
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-13 2205  ax-14 2206  ax-ext 2214  ax-coll 4224  ax-sep 4227  ax-pow 4286  ax-pr 4321  ax-un 4553  ax-setind 4658
This theorem depends on definitions:  df-bi 117  df-3an 1007  df-tru 1401  df-fal 1404  df-nf 1510  df-sb 1812  df-eu 2083  df-mo 2084  df-clab 2219  df-cleq 2225  df-clel 2228  df-nfc 2373  df-ne 2413  df-ral 2525  df-rex 2526  df-reu 2527  df-rab 2529  df-v 2814  df-sbc 3042  df-csb 3138  df-dif 3212  df-un 3214  df-in 3216  df-ss 3223  df-pw 3670  df-sn 3694  df-pr 3695  df-op 3697  df-uni 3914  df-iun 3992  df-br 4109  df-opab 4171  df-mpt 4172  df-id 4413  df-xp 4754  df-rel 4755  df-cnv 4756  df-co 4757  df-dm 4758  df-rn 4759  df-res 4760  df-ima 4761  df-iota 5311  df-fun 5353  df-fn 5354  df-f 5355  df-f1 5356  df-fo 5357  df-f1o 5358  df-fv 5359  df-ov 6052  df-oprab 6053  df-mpo 6054  df-supp 6435
This theorem is referenced by:  fvdifsuppst  6443  fvn0elsupp  6450  fvn0elsuppb  6451  rexsupp  6452  suppssrst  6460
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