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Theorem dmoprabss 6366
Description: The domain of an operation class abstraction. (Contributed by NM, 24-Aug-1995.)
Assertion
Ref Expression
dmoprabss  |-  dom  { <. <. x ,  y
>. ,  z >.  |  ( ( x  e.  A  /\  y  e.  B )  /\  ph ) }  C_  ( A  X.  B )
Distinct variable groups:    x, y,
z, A    x, B, y, z
Allowed substitution hints:    ph( x, y, z)

Proof of Theorem dmoprabss
StepHypRef Expression
1 dmoprab 6365 . 2  |-  dom  { <. <. x ,  y
>. ,  z >.  |  ( ( x  e.  A  /\  y  e.  B )  /\  ph ) }  =  { <. x ,  y >.  |  E. z ( ( x  e.  A  /\  y  e.  B )  /\  ph ) }
2 19.42v 1949 . . . 4  |-  ( E. z ( ( x  e.  A  /\  y  e.  B )  /\  ph ) 
<->  ( ( x  e.  A  /\  y  e.  B )  /\  E. z ph ) )
32opabbii 4511 . . 3  |-  { <. x ,  y >.  |  E. z ( ( x  e.  A  /\  y  e.  B )  /\  ph ) }  =  { <. x ,  y >.  |  ( ( x  e.  A  /\  y  e.  B )  /\  E. z ph ) }
4 opabssxp 5072 . . 3  |-  { <. x ,  y >.  |  ( ( x  e.  A  /\  y  e.  B
)  /\  E. z ph ) }  C_  ( A  X.  B )
53, 4eqsstri 3534 . 2  |-  { <. x ,  y >.  |  E. z ( ( x  e.  A  /\  y  e.  B )  /\  ph ) }  C_  ( A  X.  B )
61, 5eqsstri 3534 1  |-  dom  { <. <. x ,  y
>. ,  z >.  |  ( ( x  e.  A  /\  y  e.  B )  /\  ph ) }  C_  ( A  X.  B )
Colors of variables: wff setvar class
Syntax hints:    /\ wa 369   E.wex 1596    e. wcel 1767    C_ wss 3476   {copab 4504    X. cxp 4997   dom cdm 4999   {coprab 6283
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1601  ax-4 1612  ax-5 1680  ax-6 1719  ax-7 1739  ax-9 1771  ax-10 1786  ax-11 1791  ax-12 1803  ax-13 1968  ax-ext 2445  ax-sep 4568  ax-nul 4576  ax-pr 4686
This theorem depends on definitions:  df-bi 185  df-or 370  df-an 371  df-3an 975  df-tru 1382  df-ex 1597  df-nf 1600  df-sb 1712  df-eu 2279  df-mo 2280  df-clab 2453  df-cleq 2459  df-clel 2462  df-nfc 2617  df-ne 2664  df-rab 2823  df-v 3115  df-dif 3479  df-un 3481  df-in 3483  df-ss 3490  df-nul 3786  df-if 3940  df-sn 4028  df-pr 4030  df-op 4034  df-br 4448  df-opab 4506  df-xp 5005  df-dm 5009  df-oprab 6286
This theorem is referenced by:  mpt2ndm0  6498  elmpt2cl  6499  oprabexd  6768  oprabex  6769  bropopvvv  6860  dmaddsr  9458  dmmulsr  9459  axaddf  9518  axmulf  9519  2wlkonot3v  24548  2spthonot3v  24549
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