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Theorem mpoexw 6387
Description: Weak version of mpoex 6388 that holds without ax-coll 4209. If the domain and codomain of an operation given by maps-to notation are sets, the operation is a set. (Contributed by Rohan Ridenour, 14-Aug-2023.)
Hypotheses
Ref Expression
mpoexw.1  |-  A  e. 
_V
mpoexw.2  |-  B  e. 
_V
mpoexw.3  |-  D  e. 
_V
mpoexw.4  |-  A. x  e.  A  A. y  e.  B  C  e.  D
Assertion
Ref Expression
mpoexw  |-  ( x  e.  A ,  y  e.  B  |->  C )  e.  _V
Distinct variable groups:    x, y, A   
x, B, y    x, D, y
Allowed substitution hints:    C( x, y)

Proof of Theorem mpoexw
Dummy variable  z is distinct from all other variables.
StepHypRef Expression
1 eqid 2231 . . 3  |-  ( x  e.  A ,  y  e.  B  |->  C )  =  ( x  e.  A ,  y  e.  B  |->  C )
21mpofun 6133 . 2  |-  Fun  (
x  e.  A , 
y  e.  B  |->  C )
3 mpoexw.4 . . . 4  |-  A. x  e.  A  A. y  e.  B  C  e.  D
41dmmpoga 6382 . . . 4  |-  ( A. x  e.  A  A. y  e.  B  C  e.  D  ->  dom  (
x  e.  A , 
y  e.  B  |->  C )  =  ( A  X.  B ) )
53, 4ax-mp 5 . . 3  |-  dom  (
x  e.  A , 
y  e.  B  |->  C )  =  ( A  X.  B )
6 mpoexw.1 . . . 4  |-  A  e. 
_V
7 mpoexw.2 . . . 4  |-  B  e. 
_V
86, 7xpex 4848 . . 3  |-  ( A  X.  B )  e. 
_V
95, 8eqeltri 2304 . 2  |-  dom  (
x  e.  A , 
y  e.  B  |->  C )  e.  _V
101rnmpo 6142 . . 3  |-  ran  (
x  e.  A , 
y  e.  B  |->  C )  =  { z  |  E. x  e.  A  E. y  e.  B  z  =  C }
11 mpoexw.3 . . . 4  |-  D  e. 
_V
123rspec 2585 . . . . . . . . 9  |-  ( x  e.  A  ->  A. y  e.  B  C  e.  D )
1312r19.21bi 2621 . . . . . . . 8  |-  ( ( x  e.  A  /\  y  e.  B )  ->  C  e.  D )
14 eleq1a 2303 . . . . . . . 8  |-  ( C  e.  D  ->  (
z  =  C  -> 
z  e.  D ) )
1513, 14syl 14 . . . . . . 7  |-  ( ( x  e.  A  /\  y  e.  B )  ->  ( z  =  C  ->  z  e.  D
) )
1615rexlimdva 2651 . . . . . 6  |-  ( x  e.  A  ->  ( E. y  e.  B  z  =  C  ->  z  e.  D ) )
1716rexlimiv 2645 . . . . 5  |-  ( E. x  e.  A  E. y  e.  B  z  =  C  ->  z  e.  D )
1817abssi 3303 . . . 4  |-  { z  |  E. x  e.  A  E. y  e.  B  z  =  C }  C_  D
1911, 18ssexi 4232 . . 3  |-  { z  |  E. x  e.  A  E. y  e.  B  z  =  C }  e.  _V
2010, 19eqeltri 2304 . 2  |-  ran  (
x  e.  A , 
y  e.  B  |->  C )  e.  _V
21 funexw 6283 . 2  |-  ( ( Fun  ( x  e.  A ,  y  e.  B  |->  C )  /\  dom  ( x  e.  A ,  y  e.  B  |->  C )  e.  _V  /\ 
ran  ( x  e.  A ,  y  e.  B  |->  C )  e. 
_V )  ->  (
x  e.  A , 
y  e.  B  |->  C )  e.  _V )
222, 9, 20, 21mp3an 1374 1  |-  ( x  e.  A ,  y  e.  B  |->  C )  e.  _V
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ wa 104    = wceq 1398    e. wcel 2202   {cab 2217   A.wral 2511   E.wrex 2512   _Vcvv 2803    X. cxp 4729   dom cdm 4731   ran crn 4732   Fun wfun 5327    e. cmpo 6030
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 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 2204  ax-14 2205  ax-ext 2213  ax-sep 4212  ax-pow 4270  ax-pr 4305  ax-un 4536
This theorem depends on definitions:  df-bi 117  df-3an 1007  df-tru 1401  df-nf 1510  df-sb 1811  df-eu 2082  df-mo 2083  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2364  df-ral 2516  df-rex 2517  df-rab 2520  df-v 2805  df-sbc 3033  df-csb 3129  df-un 3205  df-in 3207  df-ss 3214  df-pw 3658  df-sn 3679  df-pr 3680  df-op 3682  df-uni 3899  df-iun 3977  df-br 4094  df-opab 4156  df-mpt 4157  df-id 4396  df-xp 4737  df-rel 4738  df-cnv 4739  df-co 4740  df-dm 4741  df-rn 4742  df-res 4743  df-ima 4744  df-iota 5293  df-fun 5335  df-fn 5336  df-f 5337  df-fv 5341  df-oprab 6032  df-mpo 6033  df-1st 6312  df-2nd 6313
This theorem is referenced by:  prdsvallem  13435
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