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Theorem pj1fval 15357
Description: The left projection function (for a direct product of group subspaces). (Contributed by Mario Carneiro, 15-Oct-2015.) (Revised by Mario Carneiro, 21-Apr-2016.)
Hypotheses
Ref Expression
pj1fval.v  |-  B  =  ( Base `  G
)
pj1fval.a  |-  .+  =  ( +g  `  G )
pj1fval.s  |-  .(+)  =  (
LSSum `  G )
pj1fval.p  |-  P  =  ( proj 1 `  G )
Assertion
Ref Expression
pj1fval  |-  ( ( G  e.  V  /\  T  C_  B  /\  U  C_  B )  ->  ( T P U )  =  ( z  e.  ( T  .(+)  U )  |->  ( iota_ x  e.  T E. y  e.  U  z  =  ( x  .+  y ) ) ) )
Distinct variable groups:    z,  .+    x, y, z, B    x, T, y, z    x, U, y, z    x,  .(+) , y, z    x, G, y, z    x, V, y, z
Allowed substitution hints:    P( x, y, z)    .+ ( x, y)

Proof of Theorem pj1fval
Dummy variables  t 
g  u are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 pj1fval.p . . 3  |-  P  =  ( proj 1 `  G )
2 elex 2970 . . . . 5  |-  ( G  e.  V  ->  G  e.  _V )
323ad2ant1 979 . . . 4  |-  ( ( G  e.  V  /\  T  C_  B  /\  U  C_  B )  ->  G  e.  _V )
4 fveq2 5757 . . . . . . . 8  |-  ( g  =  G  ->  ( Base `  g )  =  ( Base `  G
) )
5 pj1fval.v . . . . . . . 8  |-  B  =  ( Base `  G
)
64, 5syl6eqr 2492 . . . . . . 7  |-  ( g  =  G  ->  ( Base `  g )  =  B )
76pweqd 3828 . . . . . 6  |-  ( g  =  G  ->  ~P ( Base `  g )  =  ~P B )
8 fveq2 5757 . . . . . . . . 9  |-  ( g  =  G  ->  ( LSSum `  g )  =  ( LSSum `  G )
)
9 pj1fval.s . . . . . . . . 9  |-  .(+)  =  (
LSSum `  G )
108, 9syl6eqr 2492 . . . . . . . 8  |-  ( g  =  G  ->  ( LSSum `  g )  = 
.(+)  )
1110oveqd 6127 . . . . . . 7  |-  ( g  =  G  ->  (
t ( LSSum `  g
) u )  =  ( t  .(+)  u ) )
12 fveq2 5757 . . . . . . . . . . . 12  |-  ( g  =  G  ->  ( +g  `  g )  =  ( +g  `  G
) )
13 pj1fval.a . . . . . . . . . . . 12  |-  .+  =  ( +g  `  G )
1412, 13syl6eqr 2492 . . . . . . . . . . 11  |-  ( g  =  G  ->  ( +g  `  g )  = 
.+  )
1514oveqd 6127 . . . . . . . . . 10  |-  ( g  =  G  ->  (
x ( +g  `  g
) y )  =  ( x  .+  y
) )
1615eqeq2d 2453 . . . . . . . . 9  |-  ( g  =  G  ->  (
z  =  ( x ( +g  `  g
) y )  <->  z  =  ( x  .+  y ) ) )
1716rexbidv 2732 . . . . . . . 8  |-  ( g  =  G  ->  ( E. y  e.  u  z  =  ( x
( +g  `  g ) y )  <->  E. y  e.  u  z  =  ( x  .+  y ) ) )
1817riotabidv 6580 . . . . . . 7  |-  ( g  =  G  ->  ( iota_ x  e.  t E. y  e.  u  z  =  ( x ( +g  `  g ) y ) )  =  ( iota_ x  e.  t E. y  e.  u  z  =  ( x  .+  y ) ) )
1911, 18mpteq12dv 4312 . . . . . 6  |-  ( g  =  G  ->  (
z  e.  ( t ( LSSum `  g )
u )  |->  ( iota_ x  e.  t E. y  e.  u  z  =  ( x ( +g  `  g ) y ) ) )  =  ( z  e.  ( t 
.(+)  u )  |->  ( iota_ x  e.  t E. y  e.  u  z  =  ( x  .+  y ) ) ) )
207, 7, 19mpt2eq123dv 6165 . . . . 5  |-  ( g  =  G  ->  (
t  e.  ~P ( Base `  g ) ,  u  e.  ~P ( Base `  g )  |->  ( z  e.  ( t ( LSSum `  g )
u )  |->  ( iota_ x  e.  t E. y  e.  u  z  =  ( x ( +g  `  g ) y ) ) ) )  =  ( t  e.  ~P B ,  u  e.  ~P B  |->  ( z  e.  ( t  .(+)  u )  |->  ( iota_ x  e.  t E. y  e.  u  z  =  ( x  .+  y ) ) ) ) )
21 df-pj1 15302 . . . . 5  |-  proj 1  =  ( g  e. 
_V  |->  ( t  e. 
~P ( Base `  g
) ,  u  e. 
~P ( Base `  g
)  |->  ( z  e.  ( t ( LSSum `  g ) u ) 
|->  ( iota_ x  e.  t E. y  e.  u  z  =  ( x
( +g  `  g ) y ) ) ) ) )
22 fvex 5771 . . . . . . . 8  |-  ( Base `  G )  e.  _V
235, 22eqeltri 2512 . . . . . . 7  |-  B  e. 
_V
2423pwex 4411 . . . . . 6  |-  ~P B  e.  _V
2524, 24mpt2ex 6454 . . . . 5  |-  ( t  e.  ~P B ,  u  e.  ~P B  |->  ( z  e.  ( t  .(+)  u )  |->  ( iota_ x  e.  t E. y  e.  u  z  =  ( x  .+  y ) ) ) )  e.  _V
2620, 21, 25fvmpt 5835 . . . 4  |-  ( G  e.  _V  ->  ( proj 1 `  G )  =  ( t  e. 
~P B ,  u  e.  ~P B  |->  ( z  e.  ( t  .(+)  u )  |->  ( iota_ x  e.  t E. y  e.  u  z  =  ( x  .+  y ) ) ) ) )
273, 26syl 16 . . 3  |-  ( ( G  e.  V  /\  T  C_  B  /\  U  C_  B )  ->  ( proj 1 `  G )  =  ( t  e. 
~P B ,  u  e.  ~P B  |->  ( z  e.  ( t  .(+)  u )  |->  ( iota_ x  e.  t E. y  e.  u  z  =  ( x  .+  y ) ) ) ) )
281, 27syl5eq 2486 . 2  |-  ( ( G  e.  V  /\  T  C_  B  /\  U  C_  B )  ->  P  =  ( t  e. 
~P B ,  u  e.  ~P B  |->  ( z  e.  ( t  .(+)  u )  |->  ( iota_ x  e.  t E. y  e.  u  z  =  ( x  .+  y ) ) ) ) )
29 oveq12 6119 . . . 4  |-  ( ( t  =  T  /\  u  =  U )  ->  ( t  .(+)  u )  =  ( T  .(+)  U ) )
3029adantl 454 . . 3  |-  ( ( ( G  e.  V  /\  T  C_  B  /\  U  C_  B )  /\  ( t  =  T  /\  u  =  U ) )  ->  (
t  .(+)  u )  =  ( T  .(+)  U ) )
31 simprl 734 . . . 4  |-  ( ( ( G  e.  V  /\  T  C_  B  /\  U  C_  B )  /\  ( t  =  T  /\  u  =  U ) )  ->  t  =  T )
32 simprr 735 . . . . 5  |-  ( ( ( G  e.  V  /\  T  C_  B  /\  U  C_  B )  /\  ( t  =  T  /\  u  =  U ) )  ->  u  =  U )
3332rexeqdv 2917 . . . 4  |-  ( ( ( G  e.  V  /\  T  C_  B  /\  U  C_  B )  /\  ( t  =  T  /\  u  =  U ) )  ->  ( E. y  e.  u  z  =  ( x  .+  y )  <->  E. y  e.  U  z  =  ( x  .+  y ) ) )
3431, 33riotaeqbidv 6581 . . 3  |-  ( ( ( G  e.  V  /\  T  C_  B  /\  U  C_  B )  /\  ( t  =  T  /\  u  =  U ) )  ->  ( iota_ x  e.  t E. y  e.  u  z  =  ( x  .+  y ) )  =  ( iota_ x  e.  T E. y  e.  U  z  =  ( x  .+  y ) ) )
3530, 34mpteq12dv 4312 . 2  |-  ( ( ( G  e.  V  /\  T  C_  B  /\  U  C_  B )  /\  ( t  =  T  /\  u  =  U ) )  ->  (
z  e.  ( t 
.(+)  u )  |->  ( iota_ x  e.  t E. y  e.  u  z  =  ( x  .+  y ) ) )  =  ( z  e.  ( T 
.(+)  U )  |->  ( iota_ x  e.  T E. y  e.  U  z  =  ( x  .+  y ) ) ) )
36 simp2 959 . . 3  |-  ( ( G  e.  V  /\  T  C_  B  /\  U  C_  B )  ->  T  C_  B )
3723elpw2 4393 . . 3  |-  ( T  e.  ~P B  <->  T  C_  B
)
3836, 37sylibr 205 . 2  |-  ( ( G  e.  V  /\  T  C_  B  /\  U  C_  B )  ->  T  e.  ~P B )
39 simp3 960 . . 3  |-  ( ( G  e.  V  /\  T  C_  B  /\  U  C_  B )  ->  U  C_  B )
4023elpw2 4393 . . 3  |-  ( U  e.  ~P B  <->  U  C_  B
)
4139, 40sylibr 205 . 2  |-  ( ( G  e.  V  /\  T  C_  B  /\  U  C_  B )  ->  U  e.  ~P B )
42 ovex 6135 . . . 4  |-  ( T 
.(+)  U )  e.  _V
4342mptex 5995 . . 3  |-  ( z  e.  ( T  .(+)  U )  |->  ( iota_ x  e.  T E. y  e.  U  z  =  ( x  .+  y ) ) )  e.  _V
4443a1i 11 . 2  |-  ( ( G  e.  V  /\  T  C_  B  /\  U  C_  B )  ->  (
z  e.  ( T 
.(+)  U )  |->  ( iota_ x  e.  T E. y  e.  U  z  =  ( x  .+  y ) ) )  e.  _V )
4528, 35, 38, 41, 44ovmpt2d 6230 1  |-  ( ( G  e.  V  /\  T  C_  B  /\  U  C_  B )  ->  ( T P U )  =  ( z  e.  ( T  .(+)  U )  |->  ( iota_ x  e.  T E. y  e.  U  z  =  ( x  .+  y ) ) ) )
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ wa 360    /\ w3a 937    = wceq 1653    e. wcel 1727   E.wrex 2712   _Vcvv 2962    C_ wss 3306   ~Pcpw 3823    e. cmpt 4291   ` cfv 5483  (class class class)co 6110    e. cmpt2 6112   iota_crio 6571   Basecbs 13500   +g cplusg 13560   LSSumclsm 15299   proj
1cpj1 15300
This theorem is referenced by:  pj1val  15358  pj1f  15360
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1556  ax-5 1567  ax-17 1627  ax-9 1668  ax-8 1689  ax-13 1729  ax-14 1731  ax-6 1746  ax-7 1751  ax-11 1763  ax-12 1953  ax-ext 2423  ax-rep 4345  ax-sep 4355  ax-nul 4363  ax-pow 4406  ax-pr 4432  ax-un 4730
This theorem depends on definitions:  df-bi 179  df-or 361  df-an 362  df-3an 939  df-tru 1329  df-ex 1552  df-nf 1555  df-sb 1660  df-eu 2291  df-mo 2292  df-clab 2429  df-cleq 2435  df-clel 2438  df-nfc 2567  df-ne 2607  df-ral 2716  df-rex 2717  df-reu 2718  df-rab 2720  df-v 2964  df-sbc 3168  df-csb 3268  df-dif 3309  df-un 3311  df-in 3313  df-ss 3320  df-nul 3614  df-if 3764  df-pw 3825  df-sn 3844  df-pr 3845  df-op 3847  df-uni 4040  df-iun 4119  df-br 4238  df-opab 4292  df-mpt 4293  df-id 4527  df-xp 4913  df-rel 4914  df-cnv 4915  df-co 4916  df-dm 4917  df-rn 4918  df-res 4919  df-ima 4920  df-iota 5447  df-fun 5485  df-fn 5486  df-f 5487  df-f1 5488  df-fo 5489  df-f1o 5490  df-fv 5491  df-ov 6113  df-oprab 6114  df-mpt2 6115  df-1st 6378  df-2nd 6379  df-riota 6578  df-pj1 15302
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