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Theorem subrngin 14521
Description: The intersection of two subrings is a subring. (Contributed by AV, 15-Feb-2025.)
Assertion
Ref Expression
subrngin  |-  ( ( A  e.  (SubRng `  R )  /\  B  e.  (SubRng `  R )
)  ->  ( A  i^i  B )  e.  (SubRng `  R ) )

Proof of Theorem subrngin
Dummy variable  j is distinct from all other variables.
StepHypRef Expression
1 intprg 4003 . 2  |-  ( ( A  e.  (SubRng `  R )  /\  B  e.  (SubRng `  R )
)  ->  |^| { A ,  B }  =  ( A  i^i  B ) )
2 prssi 3873 . . 3  |-  ( ( A  e.  (SubRng `  R )  /\  B  e.  (SubRng `  R )
)  ->  { A ,  B }  C_  (SubRng `  R ) )
3 prmg 3835 . . . 4  |-  ( A  e.  (SubRng `  R
)  ->  E. j 
j  e.  { A ,  B } )
43adantr 276 . . 3  |-  ( ( A  e.  (SubRng `  R )  /\  B  e.  (SubRng `  R )
)  ->  E. j 
j  e.  { A ,  B } )
5 subrngintm 14520 . . 3  |-  ( ( { A ,  B }  C_  (SubRng `  R
)  /\  E. j 
j  e.  { A ,  B } )  ->  |^| { A ,  B }  e.  (SubRng `  R
) )
62, 4, 5syl2anc 415 . 2  |-  ( ( A  e.  (SubRng `  R )  /\  B  e.  (SubRng `  R )
)  ->  |^| { A ,  B }  e.  (SubRng `  R ) )
71, 6eqeltrrd 2316 1  |-  ( ( A  e.  (SubRng `  R )  /\  B  e.  (SubRng `  R )
)  ->  ( A  i^i  B )  e.  (SubRng `  R ) )
Colors of variables:    wff set class
This proof depends on syntax axioms:    -> wi 4    /\ wa 104   E.wex 1545    e. wcel 2209    i^i cin 3219    C_ wss 3220   {cpr 3710   |^|cint 3970   ` cfv 5377  SubRngcsubrng 14505
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-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-3 9364  df-ndx 13355  df-slot 13356  df-base 13358  df-sets 13359  df-iress 13360  df-plusg 13444  df-mulr 13445  df-0g 13612  df-mgm 13676  df-sgrp 13717  df-mnd 13730  df-grp 13808  df-minusg 13809  df-subg 13973  df-cmn 14089  df-abl 14090  df-mgp 14218  df-rng 14232  df-subrng 14506
This theorem is used by: (None)
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