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Theorem subrngin 14494
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 3998 . 2  |-  ( ( A  e.  (SubRng `  R )  /\  B  e.  (SubRng `  R )
)  ->  |^| { A ,  B }  =  ( A  i^i  B ) )
2 prssi 3868 . . 3  |-  ( ( A  e.  (SubRng `  R )  /\  B  e.  (SubRng `  R )
)  ->  { A ,  B }  C_  (SubRng `  R ) )
3 prmg 3830 . . . 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 14493 . . 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
Syntax hints:    -> wi 4    /\ wa 104   E.wex 1545    e. wcel 2209    i^i cin 3219    C_ wss 3220   {cpr 3706   |^|cint 3965   ` cfv 5372  SubRngcsubrng 14478
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-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 4241  ax-sep 4244  ax-pow 4306  ax-pr 4341  ax-un 4573  ax-setind 4679  ax-cnex 8260  ax-resscn 8261  ax-1cn 8262  ax-1re 8263  ax-icn 8264  ax-addcl 8265  ax-addrcl 8266  ax-mulcl 8267  ax-addcom 8269  ax-addass 8271  ax-i2m1 8274  ax-0lt1 8275  ax-0id 8277  ax-rnegex 8278  ax-pre-ltirr 8281  ax-pre-lttrn 8283  ax-pre-ltadd 8285
This theorem 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 3687  df-sn 3711  df-pr 3712  df-op 3714  df-uni 3931  df-int 3966  df-iun 4009  df-br 4126  df-opab 4188  df-mpt 4189  df-id 4433  df-xp 4775  df-rel 4776  df-cnv 4777  df-co 4778  df-dm 4779  df-rn 4780  df-res 4781  df-ima 4782  df-iota 5332  df-fun 5374  df-fn 5375  df-f 5376  df-f1 5377  df-fo 5378  df-f1o 5379  df-fv 5380  df-riota 6028  df-ov 6078  df-oprab 6079  df-mpo 6080  df-pnf 8352  df-mnf 8353  df-ltxr 8355  df-inn 9284  df-2 9342  df-3 9343  df-ndx 13333  df-slot 13334  df-base 13336  df-sets 13337  df-iress 13338  df-plusg 13421  df-mulr 13422  df-0g 13589  df-mgm 13653  df-sgrp 13694  df-mnd 13707  df-grp 13785  df-minusg 13786  df-subg 13950  df-cmn 14066  df-abl 14067  df-mgp 14195  df-rng 14207  df-subrng 14479
This theorem is referenced by: (None)
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