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

Theorem fmptapd 5604
Description: Append an additional value to a function. (Contributed by Thierry Arnoux, 3-Jan-2017.)
Hypotheses
Ref Expression
fmptapd.0a  |-  ( ph  ->  A  e.  _V )
fmptapd.0b  |-  ( ph  ->  B  e.  _V )
fmptapd.1  |-  ( ph  ->  ( R  u.  { A } )  =  S )
fmptapd.2  |-  ( (
ph  /\  x  =  A )  ->  C  =  B )
Assertion
Ref Expression
fmptapd  |-  ( ph  ->  ( ( x  e.  R  |->  C )  u. 
{ <. A ,  B >. } )  =  ( x  e.  S  |->  C ) )
Distinct variable groups:    x, A    x, B    x, R    x, S    ph, x
Allowed substitution hint:    C( x)

Proof of Theorem fmptapd
StepHypRef Expression
1 fmptapd.0a . . . . 5  |-  ( ph  ->  A  e.  _V )
2 fmptapd.0b . . . . 5  |-  ( ph  ->  B  e.  _V )
3 fmptsn 5602 . . . . 5  |-  ( ( A  e.  _V  /\  B  e.  _V )  ->  { <. A ,  B >. }  =  ( x  e.  { A }  |->  B ) )
41, 2, 3syl2anc 408 . . . 4  |-  ( ph  ->  { <. A ,  B >. }  =  ( x  e.  { A }  |->  B ) )
5 elsni 3540 . . . . . 6  |-  ( x  e.  { A }  ->  x  =  A )
6 fmptapd.2 . . . . . 6  |-  ( (
ph  /\  x  =  A )  ->  C  =  B )
75, 6sylan2 284 . . . . 5  |-  ( (
ph  /\  x  e.  { A } )  ->  C  =  B )
87mpteq2dva 4013 . . . 4  |-  ( ph  ->  ( x  e.  { A }  |->  C )  =  ( x  e. 
{ A }  |->  B ) )
94, 8eqtr4d 2173 . . 3  |-  ( ph  ->  { <. A ,  B >. }  =  ( x  e.  { A }  |->  C ) )
109uneq2d 3225 . 2  |-  ( ph  ->  ( ( x  e.  R  |->  C )  u. 
{ <. A ,  B >. } )  =  ( ( x  e.  R  |->  C )  u.  (
x  e.  { A }  |->  C ) ) )
11 mptun 5249 . . 3  |-  ( x  e.  ( R  u.  { A } )  |->  C )  =  ( ( x  e.  R  |->  C )  u.  ( x  e.  { A }  |->  C ) )
1211a1i 9 . 2  |-  ( ph  ->  ( x  e.  ( R  u.  { A } )  |->  C )  =  ( ( x  e.  R  |->  C )  u.  ( x  e. 
{ A }  |->  C ) ) )
13 fmptapd.1 . . 3  |-  ( ph  ->  ( R  u.  { A } )  =  S )
1413mpteq1d 4008 . 2  |-  ( ph  ->  ( x  e.  ( R  u.  { A } )  |->  C )  =  ( x  e.  S  |->  C ) )
1510, 12, 143eqtr2d 2176 1  |-  ( ph  ->  ( ( x  e.  R  |->  C )  u. 
{ <. A ,  B >. } )  =  ( x  e.  S  |->  C ) )
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ wa 103    = wceq 1331    e. wcel 1480   _Vcvv 2681    u. cun 3064   {csn 3522   <.cop 3525    |-> cmpt 3984
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 698  ax-5 1423  ax-7 1424  ax-gen 1425  ax-ie1 1469  ax-ie2 1470  ax-8 1482  ax-10 1483  ax-11 1484  ax-i12 1485  ax-bndl 1486  ax-4 1487  ax-14 1492  ax-17 1506  ax-i9 1510  ax-ial 1514  ax-i5r 1515  ax-ext 2119  ax-sep 4041  ax-pow 4093  ax-pr 4126
This theorem depends on definitions:  df-bi 116  df-3an 964  df-tru 1334  df-nf 1437  df-sb 1736  df-eu 2000  df-mo 2001  df-clab 2124  df-cleq 2130  df-clel 2133  df-nfc 2268  df-ral 2419  df-rex 2420  df-reu 2421  df-v 2683  df-un 3070  df-in 3072  df-ss 3079  df-pw 3507  df-sn 3528  df-pr 3529  df-op 3531  df-br 3925  df-opab 3985  df-mpt 3986  df-id 4210  df-xp 4540  df-rel 4541  df-cnv 4542  df-co 4543  df-dm 4544  df-rn 4545  df-fun 5120  df-fn 5121  df-f 5122  df-f1 5123  df-fo 5124  df-f1o 5125
This theorem is referenced by:  fmptpr  5605
  Copyright terms: Public domain W3C validator