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Theorem sraring 14786
Description: Condition for a subring algebra to be a ring. (Contributed by Thierry Arnoux, 24-Jul-2023.)
Hypotheses
Ref Expression
sraring.1  |-  A  =  ( (subringAlg  `  R ) `
 V )
sraring.2  |-  B  =  ( Base `  R
)
Assertion
Ref Expression
sraring  |-  ( ( R  e.  Ring  /\  V  C_  B )  ->  A  e.  Ring )

Proof of Theorem sraring
Dummy variables  x  y are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 simpl 109 . 2  |-  ( ( R  e.  Ring  /\  V  C_  B )  ->  R  e.  Ring )
2 sraring.2 . . . 4  |-  B  =  ( Base `  R
)
32a1i 9 . . 3  |-  ( ( R  e.  Ring  /\  V  C_  B )  ->  B  =  ( Base `  R
) )
4 sraring.1 . . . . . 6  |-  A  =  ( (subringAlg  `  R ) `
 V )
54a1i 9 . . . . 5  |-  ( ( R  e.  Ring  /\  V  C_  B )  ->  A  =  ( (subringAlg  `  R
) `  V )
)
6 id 19 . . . . . . 7  |-  ( V 
C_  B  ->  V  C_  B )
76, 2sseqtrdi 3296 . . . . . 6  |-  ( V 
C_  B  ->  V  C_  ( Base `  R
) )
87adantl 277 . . . . 5  |-  ( ( R  e.  Ring  /\  V  C_  B )  ->  V  C_  ( Base `  R
) )
95, 8, 1srabaseg 14776 . . . 4  |-  ( ( R  e.  Ring  /\  V  C_  B )  ->  ( Base `  R )  =  ( Base `  A
) )
102, 9eqtrid 2283 . . 3  |-  ( ( R  e.  Ring  /\  V  C_  B )  ->  B  =  ( Base `  A
) )
115, 8, 1sraaddgg 14777 . . . 4  |-  ( ( R  e.  Ring  /\  V  C_  B )  ->  ( +g  `  R )  =  ( +g  `  A
) )
1211oveqdr 6113 . . 3  |-  ( ( ( R  e.  Ring  /\  V  C_  B )  /\  ( x  e.  B  /\  y  e.  B
) )  ->  (
x ( +g  `  R
) y )  =  ( x ( +g  `  A ) y ) )
135, 8, 1sramulrg 14778 . . . 4  |-  ( ( R  e.  Ring  /\  V  C_  B )  ->  ( .r `  R )  =  ( .r `  A
) )
1413oveqdr 6113 . . 3  |-  ( ( ( R  e.  Ring  /\  V  C_  B )  /\  ( x  e.  B  /\  y  e.  B
) )  ->  (
x ( .r `  R ) y )  =  ( x ( .r `  A ) y ) )
153, 10, 12, 14ringpropd 14343 . 2  |-  ( ( R  e.  Ring  /\  V  C_  B )  ->  ( R  e.  Ring  <->  A  e.  Ring ) )
161, 15mpbid 147 1  |-  ( ( R  e.  Ring  /\  V  C_  B )  ->  A  e.  Ring )
Colors of variables:    wff set class
This proof depends on syntax axioms:    -> wi 4    /\ wa 104    = wceq 1402    e. wcel 2209    C_ wss 3220   ` cfv 5377   Basecbs 13352   +g cplusg 13431   .rcmulr 13432   Ringcrg 14300  subringAlg csra 14770
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-lttrn 8293  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-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-3 9364  df-4 9365  df-5 9366  df-6 9367  df-7 9368  df-8 9369  df-ndx 13355  df-slot 13356  df-base 13358  df-sets 13359  df-iress 13360  df-plusg 13444  df-mulr 13445  df-sca 13447  df-vsca 13448  df-ip 13449  df-0g 13612  df-mgm 13676  df-sgrp 13717  df-mnd 13730  df-grp 13808  df-mgp 14218  df-ring 14302  df-sra 14772
This theorem is used by: (None)
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