Theorem frgpinv 18000

Description: The inverse of an element of the free group. (Contributed by Mario Carneiro, 2-Oct-2015.)

Hypotheses

Ref	Expression
frgpadd.w	⊢ 𝑊 = ( I ‘Word (𝐼 × 2𝑜))
frgpadd.g	⊢ 𝐺 = (freeGrp‘𝐼)
frgpadd.r	⊢ ∼ = ( ~FG ‘𝐼)
frgpinv.n	⊢ 𝑁 = (invg‘𝐺)
frgpinv.m	⊢ 𝑀 = (𝑦 ∈ 𝐼, 𝑧 ∈ 2𝑜 ↦ ⟨𝑦, (1𝑜 ∖ 𝑧)⟩)

Assertion

Ref	Expression
frgpinv	⊢ (𝐴 ∈ 𝑊 → (𝑁‘[𝐴] ∼ ) = [(𝑀 ∘ (reverse‘𝐴))] ∼ )

Distinct variable groups:   𝑦,𝑧,𝐼   𝑦, ∼ ,𝑧   𝑦,𝑊,𝑧

Allowed substitution hints:   𝐴(𝑦,𝑧)   𝐺(𝑦,𝑧)   𝑀(𝑦,𝑧)   𝑁(𝑦,𝑧)

Proof of Theorem frgpinv

Dummy variables 𝑛 𝑣 𝑤 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		frgpadd.w	. . . . . . . . 9 ⊢ 𝑊 = ( I ‘Word (𝐼 × 2𝑜))
2		fviss 6166	. . . . . . . . 9 ⊢ ( I ‘Word (𝐼 × 2𝑜)) ⊆ Word (𝐼 × 2𝑜)
3	1, 2	eqsstri 3598	. . . . . . . 8 ⊢ 𝑊 ⊆ Word (𝐼 × 2𝑜)
4	3	sseli 3564	. . . . . . 7 ⊢ (𝐴 ∈ 𝑊 → 𝐴 ∈ Word (𝐼 × 2𝑜))
5		revcl 13361	. . . . . . 7 ⊢ (𝐴 ∈ Word (𝐼 × 2𝑜) → (reverse‘𝐴) ∈ Word (𝐼 × 2𝑜))
6	4, 5	syl 17	. . . . . 6 ⊢ (𝐴 ∈ 𝑊 → (reverse‘𝐴) ∈ Word (𝐼 × 2𝑜))
7		frgpinv.m	. . . . . . 7 ⊢ 𝑀 = (𝑦 ∈ 𝐼, 𝑧 ∈ 2𝑜 ↦ ⟨𝑦, (1𝑜 ∖ 𝑧)⟩)
8	7	efgmf 17949	. . . . . 6 ⊢ 𝑀:(𝐼 × 2𝑜)⟶(𝐼 × 2𝑜)
9		wrdco 13428	. . . . . 6 ⊢ (((reverse‘𝐴) ∈ Word (𝐼 × 2𝑜) ∧ 𝑀:(𝐼 × 2𝑜)⟶(𝐼 × 2𝑜)) → (𝑀 ∘ (reverse‘𝐴)) ∈ Word (𝐼 × 2𝑜))
10	6, 8, 9	sylancl 693	. . . . 5 ⊢ (𝐴 ∈ 𝑊 → (𝑀 ∘ (reverse‘𝐴)) ∈ Word (𝐼 × 2𝑜))
11	1	efgrcl 17951	. . . . . 6 ⊢ (𝐴 ∈ 𝑊 → (𝐼 ∈ V ∧ 𝑊 = Word (𝐼 × 2𝑜)))
12	11	simprd 478	. . . . 5 ⊢ (𝐴 ∈ 𝑊 → 𝑊 = Word (𝐼 × 2𝑜))
13	10, 12	eleqtrrd 2691	. . . 4 ⊢ (𝐴 ∈ 𝑊 → (𝑀 ∘ (reverse‘𝐴)) ∈ 𝑊)
14		frgpadd.g	. . . . 5 ⊢ 𝐺 = (freeGrp‘𝐼)
15		frgpadd.r	. . . . 5 ⊢ ∼ = ( ~FG ‘𝐼)
16		eqid 2610	. . . . 5 ⊢ (+g‘𝐺) = (+g‘𝐺)
17	1, 14, 15, 16	frgpadd 17999	. . . 4 ⊢ ((𝐴 ∈ 𝑊 ∧ (𝑀 ∘ (reverse‘𝐴)) ∈ 𝑊) → ([𝐴] ∼ (+g‘𝐺)[(𝑀 ∘ (reverse‘𝐴))] ∼ ) = [(𝐴 ++ (𝑀 ∘ (reverse‘𝐴)))] ∼ )
18	13, 17	mpdan 699	. . 3 ⊢ (𝐴 ∈ 𝑊 → ([𝐴] ∼ (+g‘𝐺)[(𝑀 ∘ (reverse‘𝐴))] ∼ ) = [(𝐴 ++ (𝑀 ∘ (reverse‘𝐴)))] ∼ )
19	1, 15	efger 17954	. . . . 5 ⊢ ∼ Er 𝑊
20	19	a1i 11	. . . 4 ⊢ (𝐴 ∈ 𝑊 → ∼ Er 𝑊)
21		eqid 2610	. . . . 5 ⊢ (𝑣 ∈ 𝑊 ↦ (𝑛 ∈ (0...(#‘𝑣)), 𝑤 ∈ (𝐼 × 2𝑜) ↦ (𝑣 splice ⟨𝑛, 𝑛, ⟨“𝑤(𝑀‘𝑤)”⟩⟩))) = (𝑣 ∈ 𝑊 ↦ (𝑛 ∈ (0...(#‘𝑣)), 𝑤 ∈ (𝐼 × 2𝑜) ↦ (𝑣 splice ⟨𝑛, 𝑛, ⟨“𝑤(𝑀‘𝑤)”⟩⟩)))
22	1, 15, 7, 21	efginvrel2 17963	. . . 4 ⊢ (𝐴 ∈ 𝑊 → (𝐴 ++ (𝑀 ∘ (reverse‘𝐴))) ∼ ∅)
23	20, 22	erthi 7680	. . 3 ⊢ (𝐴 ∈ 𝑊 → [(𝐴 ++ (𝑀 ∘ (reverse‘𝐴)))] ∼ = [∅] ∼ )
24	14, 15	frgp0 17996	. . . . . 6 ⊢ (𝐼 ∈ V → (𝐺 ∈ Grp ∧ [∅] ∼ = (0g‘𝐺)))
25	24	adantr 480	. . . . 5 ⊢ ((𝐼 ∈ V ∧ 𝑊 = Word (𝐼 × 2𝑜)) → (𝐺 ∈ Grp ∧ [∅] ∼ = (0g‘𝐺)))
26	11, 25	syl 17	. . . 4 ⊢ (𝐴 ∈ 𝑊 → (𝐺 ∈ Grp ∧ [∅] ∼ = (0g‘𝐺)))
27	26	simprd 478	. . 3 ⊢ (𝐴 ∈ 𝑊 → [∅] ∼ = (0g‘𝐺))
28	18, 23, 27	3eqtrd 2648	. 2 ⊢ (𝐴 ∈ 𝑊 → ([𝐴] ∼ (+g‘𝐺)[(𝑀 ∘ (reverse‘𝐴))] ∼ ) = (0g‘𝐺))
29	26	simpld 474	. . 3 ⊢ (𝐴 ∈ 𝑊 → 𝐺 ∈ Grp)
30		eqid 2610	. . . 4 ⊢ (Base‘𝐺) = (Base‘𝐺)
31	14, 15, 1, 30	frgpeccl 17997	. . 3 ⊢ (𝐴 ∈ 𝑊 → [𝐴] ∼ ∈ (Base‘𝐺))
32	14, 15, 1, 30	frgpeccl 17997	. . . 4 ⊢ ((𝑀 ∘ (reverse‘𝐴)) ∈ 𝑊 → [(𝑀 ∘ (reverse‘𝐴))] ∼ ∈ (Base‘𝐺))
33	13, 32	syl 17	. . 3 ⊢ (𝐴 ∈ 𝑊 → [(𝑀 ∘ (reverse‘𝐴))] ∼ ∈ (Base‘𝐺))
34		eqid 2610	. . . 4 ⊢ (0g‘𝐺) = (0g‘𝐺)
35		frgpinv.n	. . . 4 ⊢ 𝑁 = (invg‘𝐺)
36	30, 16, 34, 35	grpinvid1 17293	. . 3 ⊢ ((𝐺 ∈ Grp ∧ [𝐴] ∼ ∈ (Base‘𝐺) ∧ [(𝑀 ∘ (reverse‘𝐴))] ∼ ∈ (Base‘𝐺)) → ((𝑁‘[𝐴] ∼ ) = [(𝑀 ∘ (reverse‘𝐴))] ∼ ↔ ([𝐴] ∼ (+g‘𝐺)[(𝑀 ∘ (reverse‘𝐴))] ∼ ) = (0g‘𝐺)))
37	29, 31, 33, 36	syl3anc 1318	. 2 ⊢ (𝐴 ∈ 𝑊 → ((𝑁‘[𝐴] ∼ ) = [(𝑀 ∘ (reverse‘𝐴))] ∼ ↔ ([𝐴] ∼ (+g‘𝐺)[(𝑀 ∘ (reverse‘𝐴))] ∼ ) = (0g‘𝐺)))
38	28, 37	mpbird 246	1 ⊢ (𝐴 ∈ 𝑊 → (𝑁‘[𝐴] ∼ ) = [(𝑀 ∘ (reverse‘𝐴))] ∼ )

Syntax hints:   → wi 4   ↔ wb 195   ∧ wa 383   = wceq 1475   ∈ wcel 1977  Vcvv 3173   ∖ cdif 3537  ∅c0 3874  ⟨cop 4131  ⟨cotp 4133   ↦ cmpt 4643   I cid 4948   × cxp 5036   ∘ ccom 5042  ⟶wf 5800  ‘cfv 5804  (class class class)co 6549   ↦ cmpt2 6551  1_𝑜c1o 7440  2_𝑜c2o 7441   Er wer 7626  [cec 7627  0cc0 9815  ...cfz 12197  #chash 12979  Word cword 13146   ++ cconcat 13148   splice csplice 13151  reversecreverse 13152  ⟨“cs2 13437  Basecbs 15695  +_gcplusg 15768  0_gc0g 15923  Grpcgrp 17245  inv_gcminusg 17246   ~_FG cefg 17942  freeGrpcfrgp 17943

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1713  ax-4 1728  ax-5 1827  ax-6 1875  ax-7 1922  ax-8 1979  ax-9 1986  ax-10 2006  ax-11 2021  ax-12 2034  ax-13 2234  ax-ext 2590  ax-rep 4699  ax-sep 4709  ax-nul 4717  ax-pow 4769  ax-pr 4833  ax-un 6847  ax-cnex 9871  ax-resscn 9872  ax-1cn 9873  ax-icn 9874  ax-addcl 9875  ax-addrcl 9876  ax-mulcl 9877  ax-mulrcl 9878  ax-mulcom 9879  ax-addass 9880  ax-mulass 9881  ax-distr 9882  ax-i2m1 9883  ax-1ne0 9884  ax-1rid 9885  ax-rnegex 9886  ax-rrecex 9887  ax-cnre 9888  ax-pre-lttri 9889  ax-pre-lttrn 9890  ax-pre-ltadd 9891  ax-pre-mulgt0 9892

This theorem depends on definitions:  df-bi 196  df-or 384  df-an 385  df-3or 1032  df-3an 1033  df-tru 1478  df-ex 1696  df-nf 1701  df-sb 1868  df-eu 2462  df-mo 2463  df-clab 2597  df-cleq 2603  df-clel 2606  df-nfc 2740  df-ne 2782  df-nel 2783  df-ral 2901  df-rex 2902  df-reu 2903  df-rmo 2904  df-rab 2905  df-v 3175  df-sbc 3403  df-csb 3500  df-dif 3543  df-un 3545  df-in 3547  df-ss 3554  df-pss 3556  df-nul 3875  df-if 4037  df-pw 4110  df-sn 4126  df-pr 4128  df-tp 4130  df-op 4132  df-ot 4134  df-uni 4373  df-int 4411  df-iun 4457  df-iin 4458  df-br 4584  df-opab 4644  df-mpt 4645  df-tr 4681  df-eprel 4949  df-id 4953  df-po 4959  df-so 4960  df-fr 4997  df-we 4999  df-xp 5044  df-rel 5045  df-cnv 5046  df-co 5047  df-dm 5048  df-rn 5049  df-res 5050  df-ima 5051  df-pred 5597  df-ord 5643  df-on 5644  df-lim 5645  df-suc 5646  df-iota 5768  df-fun 5806  df-fn 5807  df-f 5808  df-f1 5809  df-fo 5810  df-f1o 5811  df-fv 5812  df-riota 6511  df-ov 6552  df-oprab 6553  df-mpt2 6554  df-om 6958  df-1st 7059  df-2nd 7060  df-wrecs 7294  df-recs 7355  df-rdg 7393  df-1o 7447  df-2o 7448  df-oadd 7451  df-er 7629  df-ec 7631  df-qs 7635  df-map 7746  df-pm 7747  df-en 7842  df-dom 7843  df-sdom 7844  df-fin 7845  df-sup 8231  df-inf 8232  df-card 8648  df-pnf 9955  df-mnf 9956  df-xr 9957  df-ltxr 9958  df-le 9959  df-sub 10147  df-neg 10148  df-nn 10898  df-2 10956  df-3 10957  df-4 10958  df-5 10959  df-6 10960  df-7 10961  df-8 10962  df-9 10963  df-n0 11170  df-xnn0 11241  df-z 11255  df-dec 11370  df-uz 11564  df-fz 12198  df-fzo 12335  df-hash 12980  df-word 13154  df-lsw 13155  df-concat 13156  df-s1 13157  df-substr 13158  df-splice 13159  df-reverse 13160  df-s2 13444  df-struct 15697  df-ndx 15698  df-slot 15699  df-base 15700  df-plusg 15781  df-mulr 15782  df-sca 15784  df-vsca 15785  df-ip 15786  df-tset 15787  df-ple 15788  df-ds 15791  df-0g 15925  df-imas 15991  df-qus 15992  df-mgm 17065  df-sgrp 17107  df-mnd 17118  df-frmd 17209  df-grp 17248  df-minusg 17249  df-efg 17945  df-frgp 17946

This theorem is referenced by:  vrgpinv  18005