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Theorem submcl 12701
Description: Submonoids are closed under the monoid operation. (Contributed by Mario Carneiro, 10-Mar-2015.)
Hypothesis
Ref Expression
submcl.p  |-  .+  =  ( +g  `  M )
Assertion
Ref Expression
submcl  |-  ( ( S  e.  (SubMnd `  M )  /\  X  e.  S  /\  Y  e.  S )  ->  ( X  .+  Y )  e.  S )

Proof of Theorem submcl
Dummy variables  x  y are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 submrcl 12694 . . . . . . 7  |-  ( S  e.  (SubMnd `  M
)  ->  M  e.  Mnd )
2 eqid 2170 . . . . . . . 8  |-  ( Base `  M )  =  (
Base `  M )
3 eqid 2170 . . . . . . . 8  |-  ( 0g
`  M )  =  ( 0g `  M
)
4 submcl.p . . . . . . . 8  |-  .+  =  ( +g  `  M )
52, 3, 4issubm 12695 . . . . . . 7  |-  ( M  e.  Mnd  ->  ( S  e.  (SubMnd `  M
)  <->  ( S  C_  ( Base `  M )  /\  ( 0g `  M
)  e.  S  /\  A. x  e.  S  A. y  e.  S  (
x  .+  y )  e.  S ) ) )
61, 5syl 14 . . . . . 6  |-  ( S  e.  (SubMnd `  M
)  ->  ( S  e.  (SubMnd `  M )  <->  ( S  C_  ( Base `  M )  /\  ( 0g `  M )  e.  S  /\  A. x  e.  S  A. y  e.  S  ( x  .+  y )  e.  S
) ) )
76ibi 175 . . . . 5  |-  ( S  e.  (SubMnd `  M
)  ->  ( S  C_  ( Base `  M
)  /\  ( 0g `  M )  e.  S  /\  A. x  e.  S  A. y  e.  S  ( x  .+  y )  e.  S ) )
87simp3d 1006 . . . 4  |-  ( S  e.  (SubMnd `  M
)  ->  A. x  e.  S  A. y  e.  S  ( x  .+  y )  e.  S
)
9 ovrspc2v 5879 . . . 4  |-  ( ( ( X  e.  S  /\  Y  e.  S
)  /\  A. x  e.  S  A. y  e.  S  ( x  .+  y )  e.  S
)  ->  ( X  .+  Y )  e.  S
)
108, 9sylan2 284 . . 3  |-  ( ( ( X  e.  S  /\  Y  e.  S
)  /\  S  e.  (SubMnd `  M ) )  ->  ( X  .+  Y )  e.  S
)
1110ancoms 266 . 2  |-  ( ( S  e.  (SubMnd `  M )  /\  ( X  e.  S  /\  Y  e.  S )
)  ->  ( X  .+  Y )  e.  S
)
12113impb 1194 1  |-  ( ( S  e.  (SubMnd `  M )  /\  X  e.  S  /\  Y  e.  S )  ->  ( X  .+  Y )  e.  S )
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ wa 103    <-> wb 104    /\ w3a 973    = wceq 1348    e. wcel 2141   A.wral 2448    C_ wss 3121   ` cfv 5198  (class class class)co 5853   Basecbs 12416   +g cplusg 12480   0gc0g 12596   Mndcmnd 12652  SubMndcsubmnd 12682
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 704  ax-5 1440  ax-7 1441  ax-gen 1442  ax-ie1 1486  ax-ie2 1487  ax-8 1497  ax-10 1498  ax-11 1499  ax-i12 1500  ax-bndl 1502  ax-4 1503  ax-17 1519  ax-i9 1523  ax-ial 1527  ax-i5r 1528  ax-13 2143  ax-14 2144  ax-ext 2152  ax-sep 4107  ax-pow 4160  ax-pr 4194  ax-un 4418  ax-cnex 7865  ax-resscn 7866  ax-1re 7868  ax-addrcl 7871
This theorem depends on definitions:  df-bi 116  df-3an 975  df-tru 1351  df-nf 1454  df-sb 1756  df-eu 2022  df-mo 2023  df-clab 2157  df-cleq 2163  df-clel 2166  df-nfc 2301  df-ral 2453  df-rex 2454  df-rab 2457  df-v 2732  df-sbc 2956  df-csb 3050  df-un 3125  df-in 3127  df-ss 3134  df-pw 3568  df-sn 3589  df-pr 3590  df-op 3592  df-uni 3797  df-int 3832  df-br 3990  df-opab 4051  df-mpt 4052  df-id 4278  df-xp 4617  df-rel 4618  df-cnv 4619  df-co 4620  df-dm 4621  df-rn 4622  df-res 4623  df-ima 4624  df-iota 5160  df-fun 5200  df-fn 5201  df-fv 5206  df-ov 5856  df-inn 8879  df-ndx 12419  df-slot 12420  df-base 12422  df-submnd 12684
This theorem is referenced by:  mhmima  12706
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