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Theorem ixpsnf1o 6856
Description: A bijection between a class and single-point functions to it. (Contributed by Stefan O'Rear, 24-Jan-2015.)
Hypothesis
Ref Expression
ixpsnf1o.f  |-  F  =  ( x  e.  A  |->  ( { I }  X.  { x } ) )
Assertion
Ref Expression
ixpsnf1o  |-  ( I  e.  V  ->  F : A -1-1-onto-> X_ y  e.  {
I } A )
Distinct variable groups:    x, I,
y    x, A, y    x, V, y    y, F
Allowed substitution hint:    F( x)

Proof of Theorem ixpsnf1o
Dummy variables  a 
b  c are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 ixpsnf1o.f . 2  |-  F  =  ( x  e.  A  |->  ( { I }  X.  { x } ) )
2 snex 4216 . . . 4  |-  { I }  e.  _V
3 snex 4216 . . . 4  |-  { x }  e.  _V
42, 3xpex 4801 . . 3  |-  ( { I }  X.  {
x } )  e. 
_V
54a1i 10 . 2  |-  ( ( I  e.  V  /\  x  e.  A )  ->  ( { I }  X.  { x } )  e.  _V )
6 vex 2791 . . . . 5  |-  a  e. 
_V
76rnex 4942 . . . 4  |-  ran  a  e.  _V
87uniex 4516 . . 3  |-  U. ran  a  e.  _V
98a1i 10 . 2  |-  ( ( I  e.  V  /\  a  e.  X_ y  e. 
{ I } A
)  ->  U. ran  a  e.  _V )
10 sneq 3651 . . . . . 6  |-  ( b  =  I  ->  { b }  =  { I } )
1110xpeq1d 4712 . . . . 5  |-  ( b  =  I  ->  ( { b }  X.  { x } )  =  ( { I }  X.  { x }
) )
1211eqeq2d 2294 . . . 4  |-  ( b  =  I  ->  (
a  =  ( { b }  X.  {
x } )  <->  a  =  ( { I }  X.  { x } ) ) )
1312anbi2d 684 . . 3  |-  ( b  =  I  ->  (
( x  e.  A  /\  a  =  ( { b }  X.  { x } ) )  <->  ( x  e.  A  /\  a  =  ( { I }  X.  { x } ) ) ) )
14 vex 2791 . . . . . 6  |-  b  e. 
_V
15 elixpsn 6855 . . . . . 6  |-  ( b  e.  _V  ->  (
a  e.  X_ y  e.  { b } A  <->  E. c  e.  A  a  =  { <. b ,  c >. } ) )
1614, 15ax-mp 8 . . . . 5  |-  ( a  e.  X_ y  e.  {
b } A  <->  E. c  e.  A  a  =  { <. b ,  c
>. } )
17 ixpeq1 6827 . . . . . . 7  |-  ( { b }  =  {
I }  ->  X_ y  e.  { b } A  =  X_ y  e.  {
I } A )
1810, 17syl 15 . . . . . 6  |-  ( b  =  I  ->  X_ y  e.  { b } A  =  X_ y  e.  {
I } A )
1918eleq2d 2350 . . . . 5  |-  ( b  =  I  ->  (
a  e.  X_ y  e.  { b } A  <->  a  e.  X_ y  e.  {
I } A ) )
2016, 19syl5bbr 250 . . . 4  |-  ( b  =  I  ->  ( E. c  e.  A  a  =  { <. b ,  c >. }  <->  a  e.  X_ y  e.  { I } A ) )
2120anbi1d 685 . . 3  |-  ( b  =  I  ->  (
( E. c  e.  A  a  =  { <. b ,  c >. }  /\  x  =  U. ran  a )  <->  ( a  e.  X_ y  e.  {
I } A  /\  x  =  U. ran  a
) ) )
22 vex 2791 . . . . . . 7  |-  x  e. 
_V
2314, 22xpsn 5700 . . . . . 6  |-  ( { b }  X.  {
x } )  =  { <. b ,  x >. }
2423eqeq2i 2293 . . . . 5  |-  ( a  =  ( { b }  X.  { x } )  <->  a  =  { <. b ,  x >. } )
2524anbi2i 675 . . . 4  |-  ( ( x  e.  A  /\  a  =  ( {
b }  X.  {
x } ) )  <-> 
( x  e.  A  /\  a  =  { <. b ,  x >. } ) )
26 eqid 2283 . . . . . . . . 9  |-  { <. b ,  x >. }  =  { <. b ,  x >. }
27 opeq2 3797 . . . . . . . . . . . 12  |-  ( c  =  x  ->  <. b ,  c >.  =  <. b ,  x >. )
2827sneqd 3653 . . . . . . . . . . 11  |-  ( c  =  x  ->  { <. b ,  c >. }  =  { <. b ,  x >. } )
2928eqeq2d 2294 . . . . . . . . . 10  |-  ( c  =  x  ->  ( { <. b ,  x >. }  =  { <. b ,  c >. }  <->  { <. b ,  x >. }  =  { <. b ,  x >. } ) )
3029rspcev 2884 . . . . . . . . 9  |-  ( ( x  e.  A  /\  {
<. b ,  x >. }  =  { <. b ,  x >. } )  ->  E. c  e.  A  { <. b ,  x >. }  =  { <. b ,  c >. } )
3126, 30mpan2 652 . . . . . . . 8  |-  ( x  e.  A  ->  E. c  e.  A  { <. b ,  x >. }  =  { <. b ,  c >. } )
3214, 22op2nda 5157 . . . . . . . . 9  |-  U. ran  {
<. b ,  x >. }  =  x
3332eqcomi 2287 . . . . . . . 8  |-  x  = 
U. ran  { <. b ,  x >. }
3431, 33jctir 524 . . . . . . 7  |-  ( x  e.  A  ->  ( E. c  e.  A  { <. b ,  x >. }  =  { <. b ,  c >. }  /\  x  =  U. ran  { <. b ,  x >. } ) )
35 eqeq1 2289 . . . . . . . . 9  |-  ( a  =  { <. b ,  x >. }  ->  (
a  =  { <. b ,  c >. }  <->  { <. b ,  x >. }  =  { <. b ,  c >. } ) )
3635rexbidv 2564 . . . . . . . 8  |-  ( a  =  { <. b ,  x >. }  ->  ( E. c  e.  A  a  =  { <. b ,  c >. }  <->  E. c  e.  A  { <. b ,  x >. }  =  { <. b ,  c >. } ) )
37 rneq 4904 . . . . . . . . . 10  |-  ( a  =  { <. b ,  x >. }  ->  ran  a  =  ran  { <. b ,  x >. } )
3837unieqd 3838 . . . . . . . . 9  |-  ( a  =  { <. b ,  x >. }  ->  U. ran  a  =  U. ran  { <. b ,  x >. } )
3938eqeq2d 2294 . . . . . . . 8  |-  ( a  =  { <. b ,  x >. }  ->  (
x  =  U. ran  a 
<->  x  =  U. ran  {
<. b ,  x >. } ) )
4036, 39anbi12d 691 . . . . . . 7  |-  ( a  =  { <. b ,  x >. }  ->  (
( E. c  e.  A  a  =  { <. b ,  c >. }  /\  x  =  U. ran  a )  <->  ( E. c  e.  A  { <. b ,  x >. }  =  { <. b ,  c >. }  /\  x  =  U. ran  { <. b ,  x >. } ) ) )
4134, 40syl5ibrcom 213 . . . . . 6  |-  ( x  e.  A  ->  (
a  =  { <. b ,  x >. }  ->  ( E. c  e.  A  a  =  { <. b ,  c >. }  /\  x  =  U. ran  a
) ) )
4241imp 418 . . . . 5  |-  ( ( x  e.  A  /\  a  =  { <. b ,  x >. } )  -> 
( E. c  e.  A  a  =  { <. b ,  c >. }  /\  x  =  U. ran  a ) )
43 vex 2791 . . . . . . . . . . 11  |-  c  e. 
_V
4414, 43op2nda 5157 . . . . . . . . . 10  |-  U. ran  {
<. b ,  c >. }  =  c
4544eqeq2i 2293 . . . . . . . . 9  |-  ( x  =  U. ran  { <. b ,  c >. } 
<->  x  =  c )
46 eqidd 2284 . . . . . . . . . . 11  |-  ( c  e.  A  ->  { <. b ,  c >. }  =  { <. b ,  c
>. } )
4746ancli 534 . . . . . . . . . 10  |-  ( c  e.  A  ->  (
c  e.  A  /\  {
<. b ,  c >. }  =  { <. b ,  c >. } ) )
48 eleq1 2343 . . . . . . . . . . 11  |-  ( x  =  c  ->  (
x  e.  A  <->  c  e.  A ) )
49 opeq2 3797 . . . . . . . . . . . . 13  |-  ( x  =  c  ->  <. b ,  x >.  =  <. b ,  c >. )
5049sneqd 3653 . . . . . . . . . . . 12  |-  ( x  =  c  ->  { <. b ,  x >. }  =  { <. b ,  c
>. } )
5150eqeq2d 2294 . . . . . . . . . . 11  |-  ( x  =  c  ->  ( { <. b ,  c
>. }  =  { <. b ,  x >. }  <->  { <. b ,  c >. }  =  { <. b ,  c
>. } ) )
5248, 51anbi12d 691 . . . . . . . . . 10  |-  ( x  =  c  ->  (
( x  e.  A  /\  { <. b ,  c
>. }  =  { <. b ,  x >. } )  <-> 
( c  e.  A  /\  { <. b ,  c
>. }  =  { <. b ,  c >. } ) ) )
5347, 52syl5ibrcom 213 . . . . . . . . 9  |-  ( c  e.  A  ->  (
x  =  c  -> 
( x  e.  A  /\  { <. b ,  c
>. }  =  { <. b ,  x >. } ) ) )
5445, 53syl5bi 208 . . . . . . . 8  |-  ( c  e.  A  ->  (
x  =  U. ran  {
<. b ,  c >. }  ->  ( x  e.  A  /\  { <. b ,  c >. }  =  { <. b ,  x >. } ) ) )
55 rneq 4904 . . . . . . . . . . 11  |-  ( a  =  { <. b ,  c >. }  ->  ran  a  =  ran  { <. b ,  c >. } )
5655unieqd 3838 . . . . . . . . . 10  |-  ( a  =  { <. b ,  c >. }  ->  U.
ran  a  =  U. ran  { <. b ,  c
>. } )
5756eqeq2d 2294 . . . . . . . . 9  |-  ( a  =  { <. b ,  c >. }  ->  ( x  =  U. ran  a 
<->  x  =  U. ran  {
<. b ,  c >. } ) )
58 eqeq1 2289 . . . . . . . . . 10  |-  ( a  =  { <. b ,  c >. }  ->  ( a  =  { <. b ,  x >. }  <->  { <. b ,  c >. }  =  { <. b ,  x >. } ) )
5958anbi2d 684 . . . . . . . . 9  |-  ( a  =  { <. b ,  c >. }  ->  ( ( x  e.  A  /\  a  =  { <. b ,  x >. } )  <->  ( x  e.  A  /\  { <. b ,  c >. }  =  { <. b ,  x >. } ) ) )
6057, 59imbi12d 311 . . . . . . . 8  |-  ( a  =  { <. b ,  c >. }  ->  ( ( x  =  U. ran  a  ->  ( x  e.  A  /\  a  =  { <. b ,  x >. } ) )  <->  ( x  =  U. ran  { <. b ,  c >. }  ->  ( x  e.  A  /\  {
<. b ,  c >. }  =  { <. b ,  x >. } ) ) ) )
6154, 60syl5ibrcom 213 . . . . . . 7  |-  ( c  e.  A  ->  (
a  =  { <. b ,  c >. }  ->  ( x  =  U. ran  a  ->  ( x  e.  A  /\  a  =  { <. b ,  x >. } ) ) ) )
6261rexlimiv 2661 . . . . . 6  |-  ( E. c  e.  A  a  =  { <. b ,  c >. }  ->  ( x  =  U. ran  a  ->  ( x  e.  A  /\  a  =  { <. b ,  x >. } ) ) )
6362imp 418 . . . . 5  |-  ( ( E. c  e.  A  a  =  { <. b ,  c >. }  /\  x  =  U. ran  a
)  ->  ( x  e.  A  /\  a  =  { <. b ,  x >. } ) )
6442, 63impbii 180 . . . 4  |-  ( ( x  e.  A  /\  a  =  { <. b ,  x >. } )  <->  ( E. c  e.  A  a  =  { <. b ,  c
>. }  /\  x  = 
U. ran  a )
)
6525, 64bitri 240 . . 3  |-  ( ( x  e.  A  /\  a  =  ( {
b }  X.  {
x } ) )  <-> 
( E. c  e.  A  a  =  { <. b ,  c >. }  /\  x  =  U. ran  a ) )
6613, 21, 65vtoclbg 2844 . 2  |-  ( I  e.  V  ->  (
( x  e.  A  /\  a  =  ( { I }  X.  { x } ) )  <->  ( a  e.  X_ y  e.  { I } A  /\  x  =  U. ran  a ) ) )
671, 5, 9, 66f1od 6067 1  |-  ( I  e.  V  ->  F : A -1-1-onto-> X_ y  e.  {
I } A )
Colors of variables: wff set class
Syntax hints:    -> wi 4    <-> wb 176    /\ wa 358    = wceq 1623    e. wcel 1684   E.wrex 2544   _Vcvv 2788   {csn 3640   <.cop 3643   U.cuni 3827    e. cmpt 4077    X. cxp 4687   ran crn 4690   -1-1-onto->wf1o 5254   X_cixp 6817
This theorem is referenced by:  mapsnf1o  6857
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-3 7  ax-mp 8  ax-gen 1533  ax-5 1544  ax-17 1603  ax-9 1635  ax-8 1643  ax-13 1686  ax-14 1688  ax-6 1703  ax-7 1708  ax-11 1715  ax-12 1866  ax-ext 2264  ax-sep 4141  ax-nul 4149  ax-pow 4188  ax-pr 4214  ax-un 4512
This theorem depends on definitions:  df-bi 177  df-or 359  df-an 360  df-3an 936  df-tru 1310  df-ex 1529  df-nf 1532  df-sb 1630  df-eu 2147  df-mo 2148  df-clab 2270  df-cleq 2276  df-clel 2279  df-nfc 2408  df-ne 2448  df-ral 2548  df-rex 2549  df-reu 2550  df-rab 2552  df-v 2790  df-sbc 2992  df-dif 3155  df-un 3157  df-in 3159  df-ss 3166  df-nul 3456  df-if 3566  df-pw 3627  df-sn 3646  df-pr 3647  df-op 3649  df-uni 3828  df-br 4024  df-opab 4078  df-mpt 4079  df-id 4309  df-xp 4695  df-rel 4696  df-cnv 4697  df-co 4698  df-dm 4699  df-rn 4700  df-res 4701  df-ima 4702  df-iota 5219  df-fun 5257  df-fn 5258  df-f 5259  df-f1 5260  df-fo 5261  df-f1o 5262  df-fv 5263  df-ixp 6818
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