Theorem grppropstrg 13221

Description: Generalize a specific 2-element group L to show that any set K with the same (relevant) properties is also a group. (Contributed by NM, 28-Oct-2012.) (Revised by Mario Carneiro, 6-Jan-2015.)

Hypotheses

Ref	Expression
grppropstr.b	|- ( Base ` K ) = B
grppropstr.p	|- ( +g ` K ) = .+
grppropstr.l	|- L = { <. ( Base ` ndx ) , B >. , <. ( +g ` ndx ) , .+ >. }

Assertion

Ref	Expression
grppropstrg	|- ( K e. V -> ( K e. Grp <-> L e. Grp ) )

Proof of Theorem grppropstrg

Dummy variables x y are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		grppropstr.b	. . . . 5 |- ( Base ` K ) = B
2		basfn 12761	. . . . . 6 |- Base Fn _V
3		elex 2774	. . . . . 6 |- ( K e. V -> K e. _V )
4		funfvex 5578	. . . . . . 7 |- ( ( Fun Base /\ K e. dom Base ) -> ( Base ` K ) e. _V )
5	4	funfni 5361	. . . . . 6 |- ( ( Base Fn _V /\ K e. _V ) -> ( Base ` K ) e. _V )
6	2, 3, 5	sylancr 414	. . . . 5 |- ( K e. V -> ( Base ` K ) e. _V )
7	1, 6	eqeltrrid 2284	. . . 4 |- ( K e. V -> B e. _V )
8		grppropstr.p	. . . . 5 |- ( +g ` K ) = .+
9		plusgslid 12815	. . . . . 6 |- ( +g = Slot ( +g ` ndx ) /\ ( +g ` ndx ) e. NN )
10	9	slotex 12730	. . . . 5 |- ( K e. V -> ( +g ` K ) e. _V )
11	8, 10	eqeltrrid 2284	. . . 4 |- ( K e. V -> .+ e. _V )
12		grppropstr.l	. . . . 5 |- L = { <. ( Base ` ndx ) , B >. , <. ( +g ` ndx ) , .+ >. }
13	12	grpbaseg 12829	. . . 4 |- ( ( B e. _V /\ .+ e. _V ) -> B = ( Base ` L ) )
14	7, 11, 13	syl2anc 411	. . 3 |- ( K e. V -> B = ( Base ` L ) )
15	1, 14	eqtrid 2241	. . 3 |- ( K e. V -> ( Base ` K ) = ( Base ` L ) )
16	14, 15	eqtr4d 2232	. 2 |- ( K e. V -> B = ( Base ` K ) )
17	12	grpplusgg 12830	. . . . 5 |- ( ( B e. _V /\ .+ e. _V ) -> .+ = ( +g ` L ) )
18	7, 11, 17	syl2anc 411	. . . 4 |- ( K e. V -> .+ = ( +g ` L ) )
19	8, 18	eqtrid 2241	. . 3 |- ( K e. V -> ( +g ` K ) = ( +g ` L ) )
20	19	oveqdr 5953	. 2 |- ( ( K e. V /\ ( x e. B /\ y e. B ) ) -> ( x ( +g ` K ) y ) = ( x ( +g ` L ) y ) )
21	16, 14, 20	grppropd 13219	1 |- ( K e. V -> ( K e. Grp <-> L e. Grp ) )

Syntax hints:   -> wi 4   /\ wa 104   <-> wb 105   = wceq 1364   e. wcel 2167   _Vcvv 2763   {cpr 3624   <.cop 3626   Fn wfn 5254   ` cfv 5259   ndxcnx 12700   Basecbs 12703   +g cplusg 12780   Grpcgrp 13202

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 615  ax-in2 616  ax-io 710  ax-5 1461  ax-7 1462  ax-gen 1463  ax-ie1 1507  ax-ie2 1508  ax-8 1518  ax-10 1519  ax-11 1520  ax-i12 1521  ax-bndl 1523  ax-4 1524  ax-17 1540  ax-i9 1544  ax-ial 1548  ax-i5r 1549  ax-13 2169  ax-14 2170  ax-ext 2178  ax-sep 4152  ax-pow 4208  ax-pr 4243  ax-un 4469  ax-setind 4574  ax-cnex 7987  ax-resscn 7988  ax-1cn 7989  ax-1re 7990  ax-icn 7991  ax-addcl 7992  ax-addrcl 7993  ax-mulcl 7994  ax-addcom 7996  ax-addass 7998  ax-i2m1 8001  ax-0lt1 8002  ax-0id 8004  ax-rnegex 8005  ax-pre-ltirr 8008  ax-pre-ltadd 8012

This theorem depends on definitions:  df-bi 117  df-3an 982  df-tru 1367  df-fal 1370  df-nf 1475  df-sb 1777  df-eu 2048  df-mo 2049  df-clab 2183  df-cleq 2189  df-clel 2192  df-nfc 2328  df-ne 2368  df-nel 2463  df-ral 2480  df-rex 2481  df-rab 2484  df-v 2765  df-sbc 2990  df-csb 3085  df-dif 3159  df-un 3161  df-in 3163  df-ss 3170  df-nul 3452  df-pw 3608  df-sn 3629  df-pr 3630  df-op 3632  df-uni 3841  df-int 3876  df-br 4035  df-opab 4096  df-mpt 4097  df-id 4329  df-xp 4670  df-rel 4671  df-cnv 4672  df-co 4673  df-dm 4674  df-rn 4675  df-res 4676  df-iota 5220  df-fun 5261  df-fn 5262  df-fv 5267  df-riota 5880  df-ov 5928  df-pnf 8080  df-mnf 8081  df-ltxr 8083  df-inn 9008  df-2 9066  df-ndx 12706  df-slot 12707  df-base 12709  df-plusg 12793  df-0g 12960  df-mgm 13058  df-sgrp 13104  df-mnd 13119  df-grp 13205

This theorem is referenced by:  ring1  13691