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Theorem grplmulf1o 13938
Description: Left multiplication by a group element is a bijection on any group. (Contributed by Mario Carneiro, 17-Jan-2015.)
Hypotheses
Ref Expression
grplmulf1o.b  |-  B  =  ( Base `  G
)
grplmulf1o.p  |-  .+  =  ( +g  `  G )
grplmulf1o.n  |-  F  =  ( x  e.  B  |->  ( X  .+  x
) )
Assertion
Ref Expression
grplmulf1o  |-  ( ( G  e.  Grp  /\  X  e.  B )  ->  F : B -1-1-onto-> B )
Distinct variable groups:    x, B    x, G    x,  .+    x, X
Allowed substitution hint:    F( x)

Proof of Theorem grplmulf1o
Dummy variable  y is distinct from all other variables.
StepHypRef Expression
1 grplmulf1o.n . 2  |-  F  =  ( x  e.  B  |->  ( X  .+  x
) )
2 grplmulf1o.b . . . 4  |-  B  =  ( Base `  G
)
3 grplmulf1o.p . . . 4  |-  .+  =  ( +g  `  G )
42, 3grpcl 13872 . . 3  |-  ( ( G  e.  Grp  /\  X  e.  B  /\  x  e.  B )  ->  ( X  .+  x
)  e.  B )
543expa 1234 . 2  |-  ( ( ( G  e.  Grp  /\  X  e.  B )  /\  x  e.  B
)  ->  ( X  .+  x )  e.  B
)
6 eqid 2238 . . . 4  |-  ( invg `  G )  =  ( invg `  G )
72, 6grpinvcl 13912 . . 3  |-  ( ( G  e.  Grp  /\  X  e.  B )  ->  ( ( invg `  G ) `  X
)  e.  B )
82, 3grpcl 13872 . . . 4  |-  ( ( G  e.  Grp  /\  ( ( invg `  G ) `  X
)  e.  B  /\  y  e.  B )  ->  ( ( ( invg `  G ) `
 X )  .+  y )  e.  B
)
983expa 1234 . . 3  |-  ( ( ( G  e.  Grp  /\  ( ( invg `  G ) `  X
)  e.  B )  /\  y  e.  B
)  ->  ( (
( invg `  G ) `  X
)  .+  y )  e.  B )
107, 9syldanl 453 . 2  |-  ( ( ( G  e.  Grp  /\  X  e.  B )  /\  y  e.  B
)  ->  ( (
( invg `  G ) `  X
)  .+  y )  e.  B )
11 eqcom 2240 . . 3  |-  ( x  =  ( ( ( invg `  G
) `  X )  .+  y )  <->  ( (
( invg `  G ) `  X
)  .+  y )  =  x )
12 simpll 531 . . . . 5  |-  ( ( ( G  e.  Grp  /\  X  e.  B )  /\  ( x  e.  B  /\  y  e.  B ) )  ->  G  e.  Grp )
1310adantrl 482 . . . . 5  |-  ( ( ( G  e.  Grp  /\  X  e.  B )  /\  ( x  e.  B  /\  y  e.  B ) )  -> 
( ( ( invg `  G ) `
 X )  .+  y )  e.  B
)
14 simprl 535 . . . . 5  |-  ( ( ( G  e.  Grp  /\  X  e.  B )  /\  ( x  e.  B  /\  y  e.  B ) )  ->  x  e.  B )
15 simplr 533 . . . . 5  |-  ( ( ( G  e.  Grp  /\  X  e.  B )  /\  ( x  e.  B  /\  y  e.  B ) )  ->  X  e.  B )
162, 3grplcan 13926 . . . . 5  |-  ( ( G  e.  Grp  /\  ( ( ( ( invg `  G
) `  X )  .+  y )  e.  B  /\  x  e.  B  /\  X  e.  B
) )  ->  (
( X  .+  (
( ( invg `  G ) `  X
)  .+  y )
)  =  ( X 
.+  x )  <->  ( (
( invg `  G ) `  X
)  .+  y )  =  x ) )
1712, 13, 14, 15, 16syl13anc 1280 . . . 4  |-  ( ( ( G  e.  Grp  /\  X  e.  B )  /\  ( x  e.  B  /\  y  e.  B ) )  -> 
( ( X  .+  ( ( ( invg `  G ) `
 X )  .+  y ) )  =  ( X  .+  x
)  <->  ( ( ( invg `  G
) `  X )  .+  y )  =  x ) )
18 eqid 2238 . . . . . . . . 9  |-  ( 0g
`  G )  =  ( 0g `  G
)
192, 3, 18, 6grprinv 13915 . . . . . . . 8  |-  ( ( G  e.  Grp  /\  X  e.  B )  ->  ( X  .+  (
( invg `  G ) `  X
) )  =  ( 0g `  G ) )
2019adantr 276 . . . . . . 7  |-  ( ( ( G  e.  Grp  /\  X  e.  B )  /\  ( x  e.  B  /\  y  e.  B ) )  -> 
( X  .+  (
( invg `  G ) `  X
) )  =  ( 0g `  G ) )
2120oveq1d 6103 . . . . . 6  |-  ( ( ( G  e.  Grp  /\  X  e.  B )  /\  ( x  e.  B  /\  y  e.  B ) )  -> 
( ( X  .+  ( ( invg `  G ) `  X
) )  .+  y
)  =  ( ( 0g `  G ) 
.+  y ) )
227adantr 276 . . . . . . 7  |-  ( ( ( G  e.  Grp  /\  X  e.  B )  /\  ( x  e.  B  /\  y  e.  B ) )  -> 
( ( invg `  G ) `  X
)  e.  B )
23 simprr 537 . . . . . . 7  |-  ( ( ( G  e.  Grp  /\  X  e.  B )  /\  ( x  e.  B  /\  y  e.  B ) )  -> 
y  e.  B )
242, 3grpass 13873 . . . . . . 7  |-  ( ( G  e.  Grp  /\  ( X  e.  B  /\  ( ( invg `  G ) `  X
)  e.  B  /\  y  e.  B )
)  ->  ( ( X  .+  ( ( invg `  G ) `
 X ) ) 
.+  y )  =  ( X  .+  (
( ( invg `  G ) `  X
)  .+  y )
) )
2512, 15, 22, 23, 24syl13anc 1280 . . . . . 6  |-  ( ( ( G  e.  Grp  /\  X  e.  B )  /\  ( x  e.  B  /\  y  e.  B ) )  -> 
( ( X  .+  ( ( invg `  G ) `  X
) )  .+  y
)  =  ( X 
.+  ( ( ( invg `  G
) `  X )  .+  y ) ) )
262, 3, 18grplid 13895 . . . . . . 7  |-  ( ( G  e.  Grp  /\  y  e.  B )  ->  ( ( 0g `  G )  .+  y
)  =  y )
2726ad2ant2rl 515 . . . . . 6  |-  ( ( ( G  e.  Grp  /\  X  e.  B )  /\  ( x  e.  B  /\  y  e.  B ) )  -> 
( ( 0g `  G )  .+  y
)  =  y )
2821, 25, 273eqtr3d 2279 . . . . 5  |-  ( ( ( G  e.  Grp  /\  X  e.  B )  /\  ( x  e.  B  /\  y  e.  B ) )  -> 
( X  .+  (
( ( invg `  G ) `  X
)  .+  y )
)  =  y )
2928eqeq1d 2247 . . . 4  |-  ( ( ( G  e.  Grp  /\  X  e.  B )  /\  ( x  e.  B  /\  y  e.  B ) )  -> 
( ( X  .+  ( ( ( invg `  G ) `
 X )  .+  y ) )  =  ( X  .+  x
)  <->  y  =  ( X  .+  x ) ) )
3017, 29bitr3d 190 . . 3  |-  ( ( ( G  e.  Grp  /\  X  e.  B )  /\  ( x  e.  B  /\  y  e.  B ) )  -> 
( ( ( ( invg `  G
) `  X )  .+  y )  =  x  <-> 
y  =  ( X 
.+  x ) ) )
3111, 30bitrid 192 . 2  |-  ( ( ( G  e.  Grp  /\  X  e.  B )  /\  ( x  e.  B  /\  y  e.  B ) )  -> 
( x  =  ( ( ( invg `  G ) `  X
)  .+  y )  <->  y  =  ( X  .+  x ) ) )
321, 5, 10, 31f1o2d 6298 1  |-  ( ( G  e.  Grp  /\  X  e.  B )  ->  F : B -1-1-onto-> B )
Colors of variables:    wff set class
This proof depends on syntax axioms:    -> wi 4    /\ wa 104    <-> wb 105    = wceq 1402    e. wcel 2209    |-> cmpt 4193   -1-1-onto->wf1o 5379   ` cfv 5380  (class class class)co 6088   Basecbs 13410   +g cplusg 13490   0gc0g 13669   Grpcgrp 13864   invgcminusg 13865
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-io 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-14 2212  ax-ext 2220  ax-coll 4248  ax-sep 4251  ax-pow 4313  ax-pr 4348  ax-un 4580  ax-cnex 8276  ax-resscn 8277  ax-1re 8279  ax-addrcl 8282
This proof depends on definitions:  df-bi 117  df-3an 1011  df-tru 1405  df-nf 1514  df-sb 1816  df-eu 2089  df-mo 2090  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-ral 2533  df-rex 2534  df-reu 2535  df-rmo 2536  df-rab 2537  df-v 2823  df-sbc 3052  df-csb 3148  df-un 3224  df-in 3226  df-ss 3233  df-pw 3690  df-sn 3715  df-pr 3716  df-op 3718  df-uni 3936  df-int 3971  df-iun 4014  df-br 4132  df-opab 4194  df-mpt 4195  df-id 4440  df-xp 4782  df-rel 4783  df-cnv 4784  df-co 4785  df-dm 4786  df-rn 4787  df-res 4788  df-ima 4789  df-iota 5340  df-fun 5382  df-fn 5383  df-f 5384  df-f1 5385  df-fo 5386  df-f1o 5387  df-fv 5388  df-riota 6041  df-ov 6091  df-inn 9314  df-2 9372  df-ndx 13413  df-slot 13414  df-base 13416  df-plusg 13503  df-0g 13671  df-mgm 13735  df-sgrp 13776  df-mnd 13789  df-grp 13867  df-minusg 13868
This theorem is used by: (None)
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