Theorem grppropstrg 13801

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 13389	. . . . . 6 |- Base Fn _V
3		elex 2833	. . . . . 6 |- ( K e. V -> K e. _V )
4		funfvex 5707	. . . . . . 7 |- ( ( Fun Base /\ K e. dom Base ) -> ( Base ` K ) e. _V )
5	4	funfni 5478	. . . . . 6 |- ( ( Base Fn _V /\ K e. _V ) -> ( Base ` K ) e. _V )
6	2, 3, 5	sylancr 418	. . . . 5 |- ( K e. V -> ( Base ` K ) e. _V )
7	1, 6	eqeltrrid 2326	. . . 4 |- ( K e. V -> B e. _V )
8		grppropstr.p	. . . . 5 |- ( +g ` K ) = .+
9		plusgslid 13443	. . . . . 6 |- ( +g = Slot ( +g ` ndx ) /\ ( +g ` ndx ) e. NN )
10	9	slotex 13357	. . . . 5 |- ( K e. V -> ( +g ` K ) e. _V )
11	8, 10	eqeltrrid 2326	. . . 4 |- ( K e. V -> .+ e. _V )
12		grppropstr.l	. . . . 5 |- L = { <. ( Base ` ndx ) , B >. , <. ( +g ` ndx ) , .+ >. }
13	12	grpbaseg 13458	. . . 4 |- ( ( B e. _V /\ .+ e. _V ) -> B = ( Base ` L ) )
14	7, 11, 13	syl2anc 415	. . 3 |- ( K e. V -> B = ( Base ` L ) )
15	1, 14	eqtrid 2283	. . 3 |- ( K e. V -> ( Base ` K ) = ( Base ` L ) )
16	14, 15	eqtr4d 2274	. 2 |- ( K e. V -> B = ( Base ` K ) )
17	12	grpplusgg 13459	. . . . 5 |- ( ( B e. _V /\ .+ e. _V ) -> .+ = ( +g ` L ) )
18	7, 11, 17	syl2anc 415	. . . 4 |- ( K e. V -> .+ = ( +g ` L ) )
19	8, 18	eqtrid 2283	. . 3 |- ( K e. V -> ( +g ` K ) = ( +g ` L ) )
20	19	oveqdr 6103	. 2 |- ( ( K e. V /\ ( x e. B /\ y e. B ) ) -> ( x ( +g ` K ) y ) = ( x ( +g ` L ) y ) )
21	16, 14, 20	grppropd 13799	1 |- ( K e. V -> ( K e. Grp <-> L e. Grp ) )

Syntax hints:   -> wi 4   /\ wa 104   <-> wb 105   = wceq 1402   e. wcel 2209   _Vcvv 2821   {cpr 3706   <.cop 3708   Fn wfn 5367   ` cfv 5372   ndxcnx 13327   Basecbs 13330   +g cplusg 13408   Grpcgrp 13782

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-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-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-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-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-iota 5332  df-fun 5374  df-fn 5375  df-fv 5380  df-riota 6028  df-ov 6078  df-pnf 8352  df-mnf 8353  df-ltxr 8355  df-inn 9284  df-2 9342  df-ndx 13333  df-slot 13334  df-base 13336  df-plusg 13421  df-0g 13589  df-mgm 13653  df-sgrp 13694  df-mnd 13707  df-grp 13785

This theorem is referenced by:  ring1  14337