ILE Home Intuitionistic Logic Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  ILE Home  >  Th. List  >  dfdm4 Unicode version

Theorem dfdm4 4796
Description: Alternate definition of domain. (Contributed by NM, 28-Dec-1996.)
Assertion
Ref Expression
dfdm4  |-  dom  A  =  ran  `' A

Proof of Theorem dfdm4
Dummy variables  x  y are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 vex 2729 . . . . 5  |-  y  e. 
_V
2 vex 2729 . . . . 5  |-  x  e. 
_V
31, 2brcnv 4787 . . . 4  |-  ( y `' A x  <->  x A
y )
43exbii 1593 . . 3  |-  ( E. y  y `' A x 
<->  E. y  x A y )
54abbii 2282 . 2  |-  { x  |  E. y  y `' A x }  =  { x  |  E. y  x A y }
6 dfrn2 4792 . 2  |-  ran  `' A  =  { x  |  E. y  y `' A x }
7 df-dm 4614 . 2  |-  dom  A  =  { x  |  E. y  x A y }
85, 6, 73eqtr4ri 2197 1  |-  dom  A  =  ran  `' A
Colors of variables: wff set class
Syntax hints:    = wceq 1343   E.wex 1480   {cab 2151   class class class wbr 3982   `'ccnv 4603   dom cdm 4604   ran crn 4605
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-io 699  ax-5 1435  ax-7 1436  ax-gen 1437  ax-ie1 1481  ax-ie2 1482  ax-8 1492  ax-10 1493  ax-11 1494  ax-i12 1495  ax-bndl 1497  ax-4 1498  ax-17 1514  ax-i9 1518  ax-ial 1522  ax-i5r 1523  ax-14 2139  ax-ext 2147  ax-sep 4100  ax-pow 4153  ax-pr 4187
This theorem depends on definitions:  df-bi 116  df-3an 970  df-tru 1346  df-nf 1449  df-sb 1751  df-eu 2017  df-mo 2018  df-clab 2152  df-cleq 2158  df-clel 2161  df-nfc 2297  df-v 2728  df-un 3120  df-in 3122  df-ss 3129  df-pw 3561  df-sn 3582  df-pr 3583  df-op 3585  df-br 3983  df-opab 4044  df-cnv 4612  df-dm 4614  df-rn 4615
This theorem is referenced by:  dmcnvcnv  4828  rncnvcnv  4829  rncoeq  4877  cnvimass  4967  cnvimarndm  4968  dminxp  5048  cnvsn0  5072  rnsnopg  5082  dmmpt  5099  dmco  5112  cores2  5116  cnvssrndm  5125  cocnvres  5128  unidmrn  5136  dfdm2  5138  cnvexg  5141  funimacnv  5264  foimacnv  5450  funcocnv2  5457  fimacnv  5614  f1opw2  6044  fopwdom  6802  sbthlemi4  6925  exmidfodomrlemim  7157  hmeores  12955
  Copyright terms: Public domain W3C validator