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

Theorem dmoprab 6159
Description: The domain of an operation class abstraction. (Contributed by NM, 17-Mar-1995.) (Revised by David Abernethy, 19-Jun-2012.)
Assertion
Ref Expression
dmoprab  |-  dom  { <. <. x ,  y
>. ,  z >.  | 
ph }  =  { <. x ,  y >.  |  E. z ph }
Distinct variable groups:    x, z    y,
z
Allowed substitution hints:    ph( x, y, z)

Proof of Theorem dmoprab
Dummy variable  w is distinct from all other variables.
StepHypRef Expression
1 dfoprab2 6125 . . 3  |-  { <. <.
x ,  y >. ,  z >.  |  ph }  =  { <. w ,  z >.  |  E. x E. y ( w  =  <. x ,  y
>.  /\  ph ) }
21dmeqi 4977 . 2  |-  dom  { <. <. x ,  y
>. ,  z >.  | 
ph }  =  dom  {
<. w ,  z >.  |  E. x E. y
( w  =  <. x ,  y >.  /\  ph ) }
3 dmopab 4987 . 2  |-  dom  { <. w ,  z >.  |  E. x E. y
( w  =  <. x ,  y >.  /\  ph ) }  =  {
w  |  E. z E. x E. y ( w  =  <. x ,  y >.  /\  ph ) }
4 exrot3 1742 . . . . 5  |-  ( E. z E. x E. y ( w  = 
<. x ,  y >.  /\  ph )  <->  E. x E. y E. z ( w  =  <. x ,  y >.  /\  ph ) )
5 19.42v 1962 . . . . . 6  |-  ( E. z ( w  = 
<. x ,  y >.  /\  ph )  <->  ( w  =  <. x ,  y
>.  /\  E. z ph ) )
652exbii 1659 . . . . 5  |-  ( E. x E. y E. z ( w  = 
<. x ,  y >.  /\  ph )  <->  E. x E. y ( w  = 
<. x ,  y >.  /\  E. z ph )
)
74, 6bitri 184 . . . 4  |-  ( E. z E. x E. y ( w  = 
<. x ,  y >.  /\  ph )  <->  E. x E. y ( w  = 
<. x ,  y >.  /\  E. z ph )
)
87abbii 2354 . . 3  |-  { w  |  E. z E. x E. y ( w  = 
<. x ,  y >.  /\  ph ) }  =  { w  |  E. x E. y ( w  =  <. x ,  y
>.  /\  E. z ph ) }
9 df-opab 4188 . . 3  |-  { <. x ,  y >.  |  E. z ph }  =  {
w  |  E. x E. y ( w  = 
<. x ,  y >.  /\  E. z ph ) }
108, 9eqtr4i 2262 . 2  |-  { w  |  E. z E. x E. y ( w  = 
<. x ,  y >.  /\  ph ) }  =  { <. x ,  y
>.  |  E. z ph }
112, 3, 103eqtri 2263 1  |-  dom  { <. <. x ,  y
>. ,  z >.  | 
ph }  =  { <. x ,  y >.  |  E. z ph }
Colors of variables: wff set class
Syntax hints:    /\ wa 104    = wceq 1402   E.wex 1545   {cab 2224   <.cop 3708   {copab 4186   dom cdm 4769   {coprab 6076
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-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 4244  ax-pow 4306  ax-pr 4341
This theorem depends on definitions:  df-bi 117  df-3an 1011  df-tru 1405  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-v 2823  df-un 3224  df-in 3226  df-ss 3233  df-pw 3687  df-sn 3711  df-pr 3712  df-op 3714  df-br 4126  df-opab 4188  df-dm 4779  df-oprab 6079
This theorem is referenced by:  dmoprabss  6160  reldmoprab  6163  fnoprabg  6179  dmaddpq  7736  dmmulpq  7737
  Copyright terms: Public domain W3C validator