Theorem srgcl 12946

Description: Closure of the multiplication operation of a semiring. (Contributed by NM, 26-Aug-2011.) (Revised by Mario Carneiro, 6-Jan-2015.) (Revised by Thierry Arnoux, 1-Apr-2018.)

Hypotheses

Ref	Expression
srgcl.b	|- B = ( Base ` R )
srgcl.t	|- .x. = ( .r ` R )

Assertion

Ref	Expression
srgcl	|- ( ( R e. SRing /\ X e. B /\ Y e. B ) -> ( X .x. Y ) e. B )

Proof of Theorem srgcl

Step	Hyp	Ref	Expression
1		eqid 2175	. . . . 5 |- (mulGrp ` R ) = (mulGrp ` R )
2	1	srgmgp 12944	. . . 4 |- ( R e. SRing -> (mulGrp ` R ) e. Mnd )
3	2	3ad2ant1 1018	. . 3 |- ( ( R e. SRing /\ X e. B /\ Y e. B ) -> (mulGrp ` R ) e. Mnd )
4		simp2 998	. . . 4 |- ( ( R e. SRing /\ X e. B /\ Y e. B ) -> X e. B )
5		srgcl.b	. . . . . 6 |- B = ( Base ` R )
6	1, 5	mgpbasg 12930	. . . . 5 |- ( R e. SRing -> B = ( Base ` (mulGrp ` R ) ) )
7	6	3ad2ant1 1018	. . . 4 |- ( ( R e. SRing /\ X e. B /\ Y e. B ) -> B = ( Base ` (mulGrp ` R ) ) )
8	4, 7	eleqtrd 2254	. . 3 |- ( ( R e. SRing /\ X e. B /\ Y e. B ) -> X e. ( Base ` (mulGrp ` R ) ) )
9		simp3 999	. . . 4 |- ( ( R e. SRing /\ X e. B /\ Y e. B ) -> Y e. B )
10	9, 7	eleqtrd 2254	. . 3 |- ( ( R e. SRing /\ X e. B /\ Y e. B ) -> Y e. ( Base ` (mulGrp ` R ) ) )
11		eqid 2175	. . . 4 |- ( Base ` (mulGrp ` R ) ) = ( Base ` (mulGrp ` R ) )
12		eqid 2175	. . . 4 |- ( +g ` (mulGrp ` R ) ) = ( +g ` (mulGrp ` R ) )
13	11, 12	mndcl 12689	. . 3 |- ( ( (mulGrp ` R ) e. Mnd /\ X e. ( Base ` (mulGrp ` R ) ) /\ Y e. ( Base ` (mulGrp ` R ) ) ) -> ( X ( +g ` (mulGrp ` R ) ) Y ) e. ( Base ` (mulGrp ` R ) ) )
14	3, 8, 10, 13	syl3anc 1238	. 2 |- ( ( R e. SRing /\ X e. B /\ Y e. B ) -> ( X ( +g ` (mulGrp ` R ) ) Y ) e. ( Base ` (mulGrp ` R ) ) )
15		srgcl.t	. . . . 5 |- .x. = ( .r ` R )
16	1, 15	mgpplusgg 12929	. . . 4 |- ( R e. SRing -> .x. = ( +g ` (mulGrp ` R ) ) )
17	16	3ad2ant1 1018	. . 3 |- ( ( R e. SRing /\ X e. B /\ Y e. B ) -> .x. = ( +g ` (mulGrp ` R ) ) )
18	17	oveqd 5882	. 2 |- ( ( R e. SRing /\ X e. B /\ Y e. B ) -> ( X .x. Y ) = ( X ( +g ` (mulGrp ` R ) ) Y ) )
19	14, 18, 7	3eltr4d 2259	1 |- ( ( R e. SRing /\ X e. B /\ Y e. B ) -> ( X .x. Y ) e. B )

Syntax hints:   -> wi 4   /\ w3a 978   = wceq 1353   e. wcel 2146   ` cfv 5208  (class class class)co 5865   Basecbs 12428   +g cplusg 12492   .rcmulr 12493   Mndcmnd 12682  mulGrpcmgp 12925  SRingcsrg 12939

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 614  ax-in2 615  ax-io 709  ax-5 1445  ax-7 1446  ax-gen 1447  ax-ie1 1491  ax-ie2 1492  ax-8 1502  ax-10 1503  ax-11 1504  ax-i12 1505  ax-bndl 1507  ax-4 1508  ax-17 1524  ax-i9 1528  ax-ial 1532  ax-i5r 1533  ax-13 2148  ax-14 2149  ax-ext 2157  ax-sep 4116  ax-pow 4169  ax-pr 4203  ax-un 4427  ax-setind 4530  ax-cnex 7877  ax-resscn 7878  ax-1cn 7879  ax-1re 7880  ax-icn 7881  ax-addcl 7882  ax-addrcl 7883  ax-mulcl 7884  ax-addcom 7886  ax-addass 7888  ax-i2m1 7891  ax-0lt1 7892  ax-0id 7894  ax-rnegex 7895  ax-pre-ltirr 7898  ax-pre-ltadd 7902

This theorem depends on definitions:  df-bi 117  df-3an 980  df-tru 1356  df-fal 1359  df-nf 1459  df-sb 1761  df-eu 2027  df-mo 2028  df-clab 2162  df-cleq 2168  df-clel 2171  df-nfc 2306  df-ne 2346  df-nel 2441  df-ral 2458  df-rex 2459  df-rab 2462  df-v 2737  df-sbc 2961  df-csb 3056  df-dif 3129  df-un 3131  df-in 3133  df-ss 3140  df-nul 3421  df-pw 3574  df-sn 3595  df-pr 3596  df-op 3598  df-uni 3806  df-int 3841  df-br 3999  df-opab 4060  df-mpt 4061  df-id 4287  df-xp 4626  df-rel 4627  df-cnv 4628  df-co 4629  df-dm 4630  df-rn 4631  df-res 4632  df-iota 5170  df-fun 5210  df-fn 5211  df-fv 5216  df-riota 5821  df-ov 5868  df-oprab 5869  df-mpo 5870  df-pnf 7968  df-mnf 7969  df-ltxr 7971  df-inn 8891  df-2 8949  df-3 8950  df-ndx 12431  df-slot 12432  df-base 12434  df-sets 12435  df-plusg 12505  df-mulr 12506  df-0g 12628  df-mgm 12640  df-sgrp 12673  df-mnd 12683  df-mgp 12926  df-srg 12940

This theorem is referenced by:  srgfcl  12949  srgmulgass  12965  srgpcomppsc  12968  srglmhm  12969  srgrmhm  12970