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Theorem fnmpt2 7238
Description: Functionality and domain of a class given by the "maps to" notation. (Contributed by FL, 17-May-2010.)
Hypothesis
Ref Expression
fmpt2.1  |-  F  =  ( x  e.  A ,  y  e.  B  |->  C )
Assertion
Ref Expression
fnmpt2  |-  ( A. x  e.  A  A. y  e.  B  C  e.  V  ->  F  Fn  ( A  X.  B
) )
Distinct variable groups:    x, A, y    x, B, y
Allowed substitution hints:    C( x, y)    F( x, y)    V( x, y)

Proof of Theorem fnmpt2
StepHypRef Expression
1 elex 3212 . . 3  |-  ( C  e.  V  ->  C  e.  _V )
212ralimi 2953 . 2  |-  ( A. x  e.  A  A. y  e.  B  C  e.  V  ->  A. x  e.  A  A. y  e.  B  C  e.  _V )
3 fmpt2.1 . . . 4  |-  F  =  ( x  e.  A ,  y  e.  B  |->  C )
43fmpt2 7237 . . 3  |-  ( A. x  e.  A  A. y  e.  B  C  e.  _V  <->  F : ( A  X.  B ) --> _V )
5 dffn2 6047 . . 3  |-  ( F  Fn  ( A  X.  B )  <->  F :
( A  X.  B
) --> _V )
64, 5bitr4i 267 . 2  |-  ( A. x  e.  A  A. y  e.  B  C  e.  _V  <->  F  Fn  ( A  X.  B ) )
72, 6sylib 208 1  |-  ( A. x  e.  A  A. y  e.  B  C  e.  V  ->  F  Fn  ( A  X.  B
) )
Colors of variables: wff setvar class
Syntax hints:    -> wi 4    = wceq 1483    e. wcel 1990   A.wral 2912   _Vcvv 3200    X. cxp 5112    Fn wfn 5883   -->wf 5884    |-> cmpt2 6652
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1722  ax-4 1737  ax-5 1839  ax-6 1888  ax-7 1935  ax-8 1992  ax-9 1999  ax-10 2019  ax-11 2034  ax-12 2047  ax-13 2246  ax-ext 2602  ax-sep 4781  ax-nul 4789  ax-pow 4843  ax-pr 4906  ax-un 6949
This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3an 1039  df-tru 1486  df-ex 1705  df-nf 1710  df-sb 1881  df-eu 2474  df-mo 2475  df-clab 2609  df-cleq 2615  df-clel 2618  df-nfc 2753  df-ne 2795  df-ral 2917  df-rex 2918  df-rab 2921  df-v 3202  df-sbc 3436  df-csb 3534  df-dif 3577  df-un 3579  df-in 3581  df-ss 3588  df-nul 3916  df-if 4087  df-sn 4178  df-pr 4180  df-op 4184  df-uni 4437  df-iun 4522  df-br 4654  df-opab 4713  df-mpt 4730  df-id 5024  df-xp 5120  df-rel 5121  df-cnv 5122  df-co 5123  df-dm 5124  df-rn 5125  df-res 5126  df-ima 5127  df-iota 5851  df-fun 5890  df-fn 5891  df-f 5892  df-fv 5896  df-oprab 6654  df-mpt2 6655  df-1st 7168  df-2nd 7169
This theorem is referenced by:  fnmpt2i  7239  dmmpt2ga  7242  fnmpt2ovd  7252  genpdm  9824  isofn  16435  brric  18744  mpt2cti  29493  f1od2  29499  cnre2csqima  29957  elrnmpt2id  39427  smflimlem3  40981  smflimlem6  40984
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