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Theorem subrgss 14513
Description: A subring is a subset. (Contributed by Stefan O'Rear, 27-Nov-2014.)
Hypothesis
Ref Expression
subrgss.1  |-  B  =  ( Base `  R
)
Assertion
Ref Expression
subrgss  |-  ( A  e.  (SubRing `  R
)  ->  A  C_  B
)

Proof of Theorem subrgss
StepHypRef Expression
1 subrgss.1 . . . 4  |-  B  =  ( Base `  R
)
2 eqid 2238 . . . 4  |-  ( 1r
`  R )  =  ( 1r `  R
)
31, 2issubrg 14512 . . 3  |-  ( A  e.  (SubRing `  R
)  <->  ( ( R  e.  Ring  /\  ( Rs  A )  e.  Ring )  /\  ( A  C_  B  /\  ( 1r `  R )  e.  A
) ) )
43simprbi 275 . 2  |-  ( A  e.  (SubRing `  R
)  ->  ( A  C_  B  /\  ( 1r
`  R )  e.  A ) )
54simpld 112 1  |-  ( A  e.  (SubRing `  R
)  ->  A  C_  B
)
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ wa 104    = wceq 1402    e. wcel 2209    C_ wss 3220   ` cfv 5375  (class class class)co 6079   Basecbs 13335   ↾s cress 13336   1rcur 14245   Ringcrg 14283  SubRingcsubrg 14508
This theorem was proved from 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-sep 4247  ax-pow 4309  ax-pr 4344  ax-un 4576  ax-cnex 8264  ax-resscn 8265  ax-1re 8267  ax-addrcl 8270
This theorem 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-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 3714  df-pr 3715  df-op 3717  df-uni 3934  df-int 3969  df-br 4129  df-opab 4191  df-mpt 4192  df-id 4436  df-xp 4778  df-rel 4779  df-cnv 4780  df-co 4781  df-dm 4782  df-rn 4783  df-res 4784  df-ima 4785  df-iota 5335  df-fun 5377  df-fn 5378  df-fv 5383  df-ov 6082  df-inn 9288  df-ndx 13338  df-slot 13339  df-base 13341  df-subrg 14510
This theorem is referenced by:  subrgsubg  14518  subrg1  14522  subrgsubm  14525  subrgdvds  14526  subrguss  14527  subrginv  14528  subrgdv  14529  subsubrg  14536  sralmod  14770  issubassa3  14995  aspid  15000  issubassa2  15018  dvply2g  15850
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