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Theorem subrngin 14459
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 3987 . 2  |-  ( ( A  e.  (SubRng `  R )  /\  B  e.  (SubRng `  R )
)  ->  |^| { A ,  B }  =  ( A  i^i  B ) )
2 prssi 3857 . . 3  |-  ( ( A  e.  (SubRng `  R )  /\  B  e.  (SubRng `  R )
)  ->  { A ,  B }  C_  (SubRng `  R ) )
3 prmg 3819 . . . 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 14458 . . 3  |-  ( ( { A ,  B }  C_  (SubRng `  R
)  /\  E. j 
j  e.  { A ,  B } )  ->  |^| { A ,  B }  e.  (SubRng `  R
) )
62, 4, 5syl2anc 411 . 2  |-  ( ( A  e.  (SubRng `  R )  /\  B  e.  (SubRng `  R )
)  ->  |^| { A ,  B }  e.  (SubRng `  R ) )
71, 6eqeltrrd 2312 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 1541    e. wcel 2205    i^i cin 3213    C_ wss 3214   {cpr 3695   |^|cint 3954   ` cfv 5357  SubRngcsubrng 14443
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 619  ax-in2 620  ax-io 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-13 2207  ax-14 2208  ax-ext 2216  ax-coll 4230  ax-sep 4233  ax-pow 4292  ax-pr 4327  ax-un 4559  ax-setind 4664  ax-cnex 8234  ax-resscn 8235  ax-1cn 8236  ax-1re 8237  ax-icn 8238  ax-addcl 8239  ax-addrcl 8240  ax-mulcl 8241  ax-addcom 8243  ax-addass 8245  ax-i2m1 8248  ax-0lt1 8249  ax-0id 8251  ax-rnegex 8252  ax-pre-ltirr 8255  ax-pre-lttrn 8257  ax-pre-ltadd 8259
This theorem depends on definitions:  df-bi 117  df-3an 1007  df-tru 1401  df-fal 1404  df-nf 1510  df-sb 1812  df-eu 2085  df-mo 2086  df-clab 2221  df-cleq 2227  df-clel 2230  df-nfc 2375  df-ne 2415  df-nel 2510  df-ral 2527  df-rex 2528  df-reu 2529  df-rmo 2530  df-rab 2531  df-v 2817  df-sbc 3046  df-csb 3142  df-dif 3216  df-un 3218  df-in 3220  df-ss 3227  df-nul 3513  df-pw 3676  df-sn 3700  df-pr 3701  df-op 3703  df-uni 3920  df-int 3955  df-iun 3998  df-br 4115  df-opab 4177  df-mpt 4178  df-id 4419  df-xp 4760  df-rel 4761  df-cnv 4762  df-co 4763  df-dm 4764  df-rn 4765  df-res 4766  df-ima 4767  df-iota 5317  df-fun 5359  df-fn 5360  df-f 5361  df-f1 5362  df-fo 5363  df-f1o 5364  df-fv 5365  df-riota 6011  df-ov 6061  df-oprab 6062  df-mpo 6063  df-pnf 8326  df-mnf 8327  df-ltxr 8329  df-inn 9255  df-2 9313  df-3 9314  df-ndx 13299  df-slot 13300  df-base 13302  df-sets 13303  df-iress 13304  df-plusg 13387  df-mulr 13388  df-0g 13555  df-mgm 13619  df-sgrp 13665  df-mnd 13678  df-grp 13758  df-minusg 13759  df-subg 13923  df-cmn 14039  df-abl 14040  df-mgp 14160  df-rng 14172  df-subrng 14444
This theorem is referenced by: (None)
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