Theorem efginvrel1 17964

Description: The inverse of the reverse of a word composed with the word relates to the identity. (This provides an explicit expression for the representation of the group inverse, given a representative of the free group equivalence class.) (Contributed by Mario Carneiro, 1-Oct-2015.)

Hypotheses

Ref	Expression
efgval.w	⊢ 𝑊 = ( I ‘Word (𝐼 × 2𝑜))
efgval.r	⊢ ∼ = ( ~FG ‘𝐼)
efgval2.m	⊢ 𝑀 = (𝑦 ∈ 𝐼, 𝑧 ∈ 2𝑜 ↦ ⟨𝑦, (1𝑜 ∖ 𝑧)⟩)
efgval2.t	⊢ 𝑇 = (𝑣 ∈ 𝑊 ↦ (𝑛 ∈ (0...(#‘𝑣)), 𝑤 ∈ (𝐼 × 2𝑜) ↦ (𝑣 splice ⟨𝑛, 𝑛, ⟨“𝑤(𝑀‘𝑤)”⟩⟩)))

Assertion

Ref	Expression
efginvrel1	⊢ (𝐴 ∈ 𝑊 → ((𝑀 ∘ (reverse‘𝐴)) ++ 𝐴) ∼ ∅)

Distinct variable groups:   𝑦,𝑧   𝑣,𝑛,𝑤,𝑦,𝑧   𝑛,𝑀,𝑣,𝑤   𝑛,𝑊,𝑣,𝑤,𝑦,𝑧   𝑦, ∼ ,𝑧   𝑛,𝐼,𝑣,𝑤,𝑦,𝑧

Allowed substitution hints:   𝐴(𝑦,𝑧,𝑤,𝑣,𝑛)   ∼ (𝑤,𝑣,𝑛)   𝑇(𝑦,𝑧,𝑤,𝑣,𝑛)   𝑀(𝑦,𝑧)

Proof of Theorem efginvrel1

Dummy variables 𝑎 𝑐 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		efgval.w	. . . . . . . . . 10 ⊢ 𝑊 = ( I ‘Word (𝐼 × 2𝑜))
2		fviss 6166	. . . . . . . . . 10 ⊢ ( I ‘Word (𝐼 × 2𝑜)) ⊆ Word (𝐼 × 2𝑜)
3	1, 2	eqsstri 3598	. . . . . . . . 9 ⊢ 𝑊 ⊆ Word (𝐼 × 2𝑜)
4	3	sseli 3564	. . . . . . . 8 ⊢ (𝐴 ∈ 𝑊 → 𝐴 ∈ Word (𝐼 × 2𝑜))
5		revcl 13361	. . . . . . . 8 ⊢ (𝐴 ∈ Word (𝐼 × 2𝑜) → (reverse‘𝐴) ∈ Word (𝐼 × 2𝑜))
6	4, 5	syl 17	. . . . . . 7 ⊢ (𝐴 ∈ 𝑊 → (reverse‘𝐴) ∈ Word (𝐼 × 2𝑜))
7		efgval2.m	. . . . . . . 8 ⊢ 𝑀 = (𝑦 ∈ 𝐼, 𝑧 ∈ 2𝑜 ↦ ⟨𝑦, (1𝑜 ∖ 𝑧)⟩)
8	7	efgmf 17949	. . . . . . 7 ⊢ 𝑀:(𝐼 × 2𝑜)⟶(𝐼 × 2𝑜)
9		revco 13431	. . . . . . 7 ⊢ (((reverse‘𝐴) ∈ Word (𝐼 × 2𝑜) ∧ 𝑀:(𝐼 × 2𝑜)⟶(𝐼 × 2𝑜)) → (𝑀 ∘ (reverse‘(reverse‘𝐴))) = (reverse‘(𝑀 ∘ (reverse‘𝐴))))
10	6, 8, 9	sylancl 693	. . . . . 6 ⊢ (𝐴 ∈ 𝑊 → (𝑀 ∘ (reverse‘(reverse‘𝐴))) = (reverse‘(𝑀 ∘ (reverse‘𝐴))))
11		revrev 13367	. . . . . . . 8 ⊢ (𝐴 ∈ Word (𝐼 × 2𝑜) → (reverse‘(reverse‘𝐴)) = 𝐴)
12	4, 11	syl 17	. . . . . . 7 ⊢ (𝐴 ∈ 𝑊 → (reverse‘(reverse‘𝐴)) = 𝐴)
13	12	coeq2d 5206	. . . . . 6 ⊢ (𝐴 ∈ 𝑊 → (𝑀 ∘ (reverse‘(reverse‘𝐴))) = (𝑀 ∘ 𝐴))
14	10, 13	eqtr3d 2646	. . . . 5 ⊢ (𝐴 ∈ 𝑊 → (reverse‘(𝑀 ∘ (reverse‘𝐴))) = (𝑀 ∘ 𝐴))
15	14	coeq2d 5206	. . . 4 ⊢ (𝐴 ∈ 𝑊 → (𝑀 ∘ (reverse‘(𝑀 ∘ (reverse‘𝐴)))) = (𝑀 ∘ (𝑀 ∘ 𝐴)))
16		wrdf 13165	. . . . . . . . 9 ⊢ (𝐴 ∈ Word (𝐼 × 2𝑜) → 𝐴:(0..^(#‘𝐴))⟶(𝐼 × 2𝑜))
17	4, 16	syl 17	. . . . . . . 8 ⊢ (𝐴 ∈ 𝑊 → 𝐴:(0..^(#‘𝐴))⟶(𝐼 × 2𝑜))
18	17	ffvelrnda 6267	. . . . . . 7 ⊢ ((𝐴 ∈ 𝑊 ∧ 𝑐 ∈ (0..^(#‘𝐴))) → (𝐴‘𝑐) ∈ (𝐼 × 2𝑜))
19	7	efgmnvl 17950	. . . . . . 7 ⊢ ((𝐴‘𝑐) ∈ (𝐼 × 2𝑜) → (𝑀‘(𝑀‘(𝐴‘𝑐))) = (𝐴‘𝑐))
20	18, 19	syl 17	. . . . . 6 ⊢ ((𝐴 ∈ 𝑊 ∧ 𝑐 ∈ (0..^(#‘𝐴))) → (𝑀‘(𝑀‘(𝐴‘𝑐))) = (𝐴‘𝑐))
21	20	mpteq2dva 4672	. . . . 5 ⊢ (𝐴 ∈ 𝑊 → (𝑐 ∈ (0..^(#‘𝐴)) ↦ (𝑀‘(𝑀‘(𝐴‘𝑐)))) = (𝑐 ∈ (0..^(#‘𝐴)) ↦ (𝐴‘𝑐)))
22	8	ffvelrni 6266	. . . . . . 7 ⊢ ((𝐴‘𝑐) ∈ (𝐼 × 2𝑜) → (𝑀‘(𝐴‘𝑐)) ∈ (𝐼 × 2𝑜))
23	18, 22	syl 17	. . . . . 6 ⊢ ((𝐴 ∈ 𝑊 ∧ 𝑐 ∈ (0..^(#‘𝐴))) → (𝑀‘(𝐴‘𝑐)) ∈ (𝐼 × 2𝑜))
24		fcompt 6306	. . . . . . 7 ⊢ ((𝑀:(𝐼 × 2𝑜)⟶(𝐼 × 2𝑜) ∧ 𝐴:(0..^(#‘𝐴))⟶(𝐼 × 2𝑜)) → (𝑀 ∘ 𝐴) = (𝑐 ∈ (0..^(#‘𝐴)) ↦ (𝑀‘(𝐴‘𝑐))))
25	8, 17, 24	sylancr 694	. . . . . 6 ⊢ (𝐴 ∈ 𝑊 → (𝑀 ∘ 𝐴) = (𝑐 ∈ (0..^(#‘𝐴)) ↦ (𝑀‘(𝐴‘𝑐))))
26	8	a1i 11	. . . . . . 7 ⊢ (𝐴 ∈ 𝑊 → 𝑀:(𝐼 × 2𝑜)⟶(𝐼 × 2𝑜))
27	26	feqmptd 6159	. . . . . 6 ⊢ (𝐴 ∈ 𝑊 → 𝑀 = (𝑎 ∈ (𝐼 × 2𝑜) ↦ (𝑀‘𝑎)))
28		fveq2 6103	. . . . . 6 ⊢ (𝑎 = (𝑀‘(𝐴‘𝑐)) → (𝑀‘𝑎) = (𝑀‘(𝑀‘(𝐴‘𝑐))))
29	23, 25, 27, 28	fmptco 6303	. . . . 5 ⊢ (𝐴 ∈ 𝑊 → (𝑀 ∘ (𝑀 ∘ 𝐴)) = (𝑐 ∈ (0..^(#‘𝐴)) ↦ (𝑀‘(𝑀‘(𝐴‘𝑐)))))
30	17	feqmptd 6159	. . . . 5 ⊢ (𝐴 ∈ 𝑊 → 𝐴 = (𝑐 ∈ (0..^(#‘𝐴)) ↦ (𝐴‘𝑐)))
31	21, 29, 30	3eqtr4d 2654	. . . 4 ⊢ (𝐴 ∈ 𝑊 → (𝑀 ∘ (𝑀 ∘ 𝐴)) = 𝐴)
32	15, 31	eqtrd 2644	. . 3 ⊢ (𝐴 ∈ 𝑊 → (𝑀 ∘ (reverse‘(𝑀 ∘ (reverse‘𝐴)))) = 𝐴)
33	32	oveq2d 6565	. 2 ⊢ (𝐴 ∈ 𝑊 → ((𝑀 ∘ (reverse‘𝐴)) ++ (𝑀 ∘ (reverse‘(𝑀 ∘ (reverse‘𝐴))))) = ((𝑀 ∘ (reverse‘𝐴)) ++ 𝐴))
34		wrdco 13428	. . . . 5 ⊢ (((reverse‘𝐴) ∈ Word (𝐼 × 2𝑜) ∧ 𝑀:(𝐼 × 2𝑜)⟶(𝐼 × 2𝑜)) → (𝑀 ∘ (reverse‘𝐴)) ∈ Word (𝐼 × 2𝑜))
35	6, 8, 34	sylancl 693	. . . 4 ⊢ (𝐴 ∈ 𝑊 → (𝑀 ∘ (reverse‘𝐴)) ∈ Word (𝐼 × 2𝑜))
36	1	efgrcl 17951	. . . . 5 ⊢ (𝐴 ∈ 𝑊 → (𝐼 ∈ V ∧ 𝑊 = Word (𝐼 × 2𝑜)))
37	36	simprd 478	. . . 4 ⊢ (𝐴 ∈ 𝑊 → 𝑊 = Word (𝐼 × 2𝑜))
38	35, 37	eleqtrrd 2691	. . 3 ⊢ (𝐴 ∈ 𝑊 → (𝑀 ∘ (reverse‘𝐴)) ∈ 𝑊)
39		efgval.r	. . . 4 ⊢ ∼ = ( ~FG ‘𝐼)
40		efgval2.t	. . . 4 ⊢ 𝑇 = (𝑣 ∈ 𝑊 ↦ (𝑛 ∈ (0...(#‘𝑣)), 𝑤 ∈ (𝐼 × 2𝑜) ↦ (𝑣 splice ⟨𝑛, 𝑛, ⟨“𝑤(𝑀‘𝑤)”⟩⟩)))
41	1, 39, 7, 40	efginvrel2 17963	. . 3 ⊢ ((𝑀 ∘ (reverse‘𝐴)) ∈ 𝑊 → ((𝑀 ∘ (reverse‘𝐴)) ++ (𝑀 ∘ (reverse‘(𝑀 ∘ (reverse‘𝐴))))) ∼ ∅)
42	38, 41	syl 17	. 2 ⊢ (𝐴 ∈ 𝑊 → ((𝑀 ∘ (reverse‘𝐴)) ++ (𝑀 ∘ (reverse‘(𝑀 ∘ (reverse‘𝐴))))) ∼ ∅)
43	33, 42	eqbrtrrd 4607	1 ⊢ (𝐴 ∈ 𝑊 → ((𝑀 ∘ (reverse‘𝐴)) ++ 𝐴) ∼ ∅)

Syntax hints:   → wi 4   ∧ wa 383   = wceq 1475   ∈ wcel 1977  Vcvv 3173   ∖ cdif 3537  ∅c0 3874  ⟨cop 4131  ⟨cotp 4133   class class class wbr 4583   ↦ 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  0cc0 9815  ...cfz 12197  ..^cfzo 12334  #chash 12979  Word cword 13146   ++ cconcat 13148   splice csplice 13151  reversecreverse 13152  ⟨“cs2 13437   ~_FG cefg 17942

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-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-map 7746  df-pm 7747  df-en 7842  df-dom 7843  df-sdom 7844  df-fin 7845  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-n0 11170  df-xnn0 11241  df-z 11255  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-efg 17945

This theorem is referenced by:  frgp0  17996