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Theorem issubgrpd 13994
Description: Prove a subgroup by closure. (Contributed by Stefan O'Rear, 7-Dec-2014.)
Hypotheses
Ref Expression
issubgrpd.s  |-  ( ph  ->  S  =  ( Is  D ) )
issubgrpd.z  |-  ( ph  ->  .0.  =  ( 0g
`  I ) )
issubgrpd.p  |-  ( ph  ->  .+  =  ( +g  `  I ) )
issubgrpd.ss  |-  ( ph  ->  D  C_  ( Base `  I ) )
issubgrpd.zcl  |-  ( ph  ->  .0.  e.  D )
issubgrpd.acl  |-  ( (
ph  /\  x  e.  D  /\  y  e.  D
)  ->  ( x  .+  y )  e.  D
)
issubgrpd.ncl  |-  ( (
ph  /\  x  e.  D )  ->  (
( invg `  I ) `  x
)  e.  D )
issubgrpd.g  |-  ( ph  ->  I  e.  Grp )
Assertion
Ref Expression
issubgrpd  |-  ( ph  ->  S  e.  Grp )
Distinct variable groups:    x, y,  .0.    x, D, y    x, I, y    x,  .+ , y    ph, x, y    x, S, y

Proof of Theorem issubgrpd
StepHypRef Expression
1 issubgrpd.s . 2  |-  ( ph  ->  S  =  ( Is  D ) )
2 issubgrpd.z . . . 4  |-  ( ph  ->  .0.  =  ( 0g
`  I ) )
3 issubgrpd.p . . . 4  |-  ( ph  ->  .+  =  ( +g  `  I ) )
4 issubgrpd.ss . . . 4  |-  ( ph  ->  D  C_  ( Base `  I ) )
5 issubgrpd.zcl . . . 4  |-  ( ph  ->  .0.  e.  D )
6 issubgrpd.acl . . . 4  |-  ( (
ph  /\  x  e.  D  /\  y  e.  D
)  ->  ( x  .+  y )  e.  D
)
7 issubgrpd.ncl . . . 4  |-  ( (
ph  /\  x  e.  D )  ->  (
( invg `  I ) `  x
)  e.  D )
8 issubgrpd.g . . . 4  |-  ( ph  ->  I  e.  Grp )
91, 2, 3, 4, 5, 6, 7, 8issubgrpd2 13993 . . 3  |-  ( ph  ->  D  e.  (SubGrp `  I ) )
10 eqid 2238 . . . 4  |-  ( Is  D )  =  ( Is  D )
1110subggrp 13980 . . 3  |-  ( D  e.  (SubGrp `  I
)  ->  ( Is  D
)  e.  Grp )
129, 11syl 14 . 2  |-  ( ph  ->  ( Is  D )  e.  Grp )
131, 12eqeltrd 2315 1  |-  ( ph  ->  S  e.  Grp )
Colors of variables:    wff set class
This proof depends on syntax axioms:    -> wi 4    /\ wa 104    /\ w3a 1009    = wceq 1402    e. wcel 2209    C_ wss 3220   ` cfv 5377  (class class class)co 6085   Basecbs 13352   ↾s cress 13353   +g cplusg 13431   0gc0g 13610   Grpcgrp 13805   invgcminusg 13806  SubGrpcsubg 13970
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 623  ax-in2 624  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 4246  ax-sep 4249  ax-pow 4311  ax-pr 4346  ax-un 4578  ax-setind 4684  ax-cnex 8270  ax-resscn 8271  ax-1cn 8272  ax-1re 8273  ax-icn 8274  ax-addcl 8275  ax-addrcl 8276  ax-mulcl 8277  ax-addcom 8279  ax-addass 8281  ax-i2m1 8284  ax-0lt1 8285  ax-0id 8287  ax-rnegex 8288  ax-pre-ltirr 8291  ax-pre-ltadd 8295
This proof depends on definitions:  df-bi 117  df-3an 1011  df-tru 1405  df-fal 1408  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-ne 2421  df-nel 2516  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-dif 3222  df-un 3224  df-in 3226  df-ss 3233  df-nul 3521  df-pw 3690  df-sn 3715  df-pr 3716  df-op 3718  df-uni 3936  df-int 3971  df-iun 4014  df-br 4131  df-opab 4193  df-mpt 4194  df-id 4438  df-xp 4780  df-rel 4781  df-cnv 4782  df-co 4783  df-dm 4784  df-rn 4785  df-res 4786  df-ima 4787  df-iota 5337  df-fun 5379  df-fn 5380  df-f 5381  df-f1 5382  df-fo 5383  df-f1o 5384  df-fv 5385  df-riota 6038  df-ov 6088  df-oprab 6089  df-mpo 6090  df-pnf 8362  df-mnf 8363  df-ltxr 8365  df-inn 9305  df-2 9363  df-ndx 13355  df-slot 13356  df-base 13358  df-sets 13359  df-iress 13360  df-plusg 13444  df-0g 13612  df-mgm 13676  df-sgrp 13717  df-mnd 13730  df-grp 13808  df-minusg 13809  df-subg 13973
This theorem is used by: (None)
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