MPE Home Metamath Proof Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  MPE Home  >  Th. List  >  plusffn Unicode version

Theorem plusffn 14382
Description: The group addition operation is a function. (Contributed by Mario Carneiro, 20-Sep-2015.)
Hypotheses
Ref Expression
mndplusf.1  |-  B  =  ( Base `  G
)
mndplusf.2  |-  .+^  =  ( + f `  G
)
Assertion
Ref Expression
plusffn  |-  .+^  Fn  ( B  X.  B )

Proof of Theorem plusffn
Dummy variables  x  y are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 mndplusf.1 . . 3  |-  B  =  ( Base `  G
)
2 eqid 2283 . . 3  |-  ( +g  `  G )  =  ( +g  `  G )
3 mndplusf.2 . . 3  |-  .+^  =  ( + f `  G
)
41, 2, 3plusffval 14379 . 2  |-  .+^  =  ( x  e.  B , 
y  e.  B  |->  ( x ( +g  `  G
) y ) )
5 ovex 5883 . 2  |-  ( x ( +g  `  G
) y )  e. 
_V
64, 5fnmpt2i 6193 1  |-  .+^  Fn  ( B  X.  B )
Colors of variables: wff set class
Syntax hints:    = wceq 1623    X. cxp 4687    Fn wfn 5250   ` cfv 5255  (class class class)co 5858   Basecbs 13148   +g cplusg 13208   + fcplusf 14364
This theorem is referenced by:  tmdcn2  17772
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-rab 2552  df-v 2790  df-sbc 2992  df-csb 3082  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-iun 3907  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-fv 5263  df-ov 5861  df-oprab 5862  df-mpt2 5863  df-1st 6122  df-2nd 6123  df-plusf 14368
  Copyright terms: Public domain W3C validator