Theorem efginvrel1 18141

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 6256	. . . . . . . . . 10 ⊢ ( I ‘Word (𝐼 × 2𝑜)) ⊆ Word (𝐼 × 2𝑜)
3	1, 2	eqsstri 3635	. . . . . . . . 9 ⊢ 𝑊 ⊆ Word (𝐼 × 2𝑜)
4	3	sseli 3599	. . . . . . . 8 ⊢ (𝐴 ∈ 𝑊 → 𝐴 ∈ Word (𝐼 × 2𝑜))
5		revcl 13510	. . . . . . . 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 18126	. . . . . . 7 ⊢ 𝑀:(𝐼 × 2𝑜)⟶(𝐼 × 2𝑜)
9		revco 13580	. . . . . . 7 ⊢ (((reverse‘𝐴) ∈ Word (𝐼 × 2𝑜) ∧ 𝑀:(𝐼 × 2𝑜)⟶(𝐼 × 2𝑜)) → (𝑀 ∘ (reverse‘(reverse‘𝐴))) = (reverse‘(𝑀 ∘ (reverse‘𝐴))))
10	6, 8, 9	sylancl 694	. . . . . 6 ⊢ (𝐴 ∈ 𝑊 → (𝑀 ∘ (reverse‘(reverse‘𝐴))) = (reverse‘(𝑀 ∘ (reverse‘𝐴))))
11		revrev 13516	. . . . . . . 8 ⊢ (𝐴 ∈ Word (𝐼 × 2𝑜) → (reverse‘(reverse‘𝐴)) = 𝐴)
12	4, 11	syl 17	. . . . . . 7 ⊢ (𝐴 ∈ 𝑊 → (reverse‘(reverse‘𝐴)) = 𝐴)
13	12	coeq2d 5284	. . . . . 6 ⊢ (𝐴 ∈ 𝑊 → (𝑀 ∘ (reverse‘(reverse‘𝐴))) = (𝑀 ∘ 𝐴))
14	10, 13	eqtr3d 2658	. . . . 5 ⊢ (𝐴 ∈ 𝑊 → (reverse‘(𝑀 ∘ (reverse‘𝐴))) = (𝑀 ∘ 𝐴))
15	14	coeq2d 5284	. . . 4 ⊢ (𝐴 ∈ 𝑊 → (𝑀 ∘ (reverse‘(𝑀 ∘ (reverse‘𝐴)))) = (𝑀 ∘ (𝑀 ∘ 𝐴)))
16		wrdf 13310	. . . . . . . . 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 6359	. . . . . . 7 ⊢ ((𝐴 ∈ 𝑊 ∧ 𝑐 ∈ (0..^(#‘𝐴))) → (𝐴‘𝑐) ∈ (𝐼 × 2𝑜))
19	7	efgmnvl 18127	. . . . . . 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 4744	. . . . 5 ⊢ (𝐴 ∈ 𝑊 → (𝑐 ∈ (0..^(#‘𝐴)) ↦ (𝑀‘(𝑀‘(𝐴‘𝑐)))) = (𝑐 ∈ (0..^(#‘𝐴)) ↦ (𝐴‘𝑐)))
22	8	ffvelrni 6358	. . . . . . 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 6400	. . . . . . 7 ⊢ ((𝑀:(𝐼 × 2𝑜)⟶(𝐼 × 2𝑜) ∧ 𝐴:(0..^(#‘𝐴))⟶(𝐼 × 2𝑜)) → (𝑀 ∘ 𝐴) = (𝑐 ∈ (0..^(#‘𝐴)) ↦ (𝑀‘(𝐴‘𝑐))))
25	8, 17, 24	sylancr 695	. . . . . 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 6249	. . . . . 6 ⊢ (𝐴 ∈ 𝑊 → 𝑀 = (𝑎 ∈ (𝐼 × 2𝑜) ↦ (𝑀‘𝑎)))
28		fveq2 6191	. . . . . 6 ⊢ (𝑎 = (𝑀‘(𝐴‘𝑐)) → (𝑀‘𝑎) = (𝑀‘(𝑀‘(𝐴‘𝑐))))
29	23, 25, 27, 28	fmptco 6396	. . . . 5 ⊢ (𝐴 ∈ 𝑊 → (𝑀 ∘ (𝑀 ∘ 𝐴)) = (𝑐 ∈ (0..^(#‘𝐴)) ↦ (𝑀‘(𝑀‘(𝐴‘𝑐)))))
30	17	feqmptd 6249	. . . . 5 ⊢ (𝐴 ∈ 𝑊 → 𝐴 = (𝑐 ∈ (0..^(#‘𝐴)) ↦ (𝐴‘𝑐)))
31	21, 29, 30	3eqtr4d 2666	. . . 4 ⊢ (𝐴 ∈ 𝑊 → (𝑀 ∘ (𝑀 ∘ 𝐴)) = 𝐴)
32	15, 31	eqtrd 2656	. . 3 ⊢ (𝐴 ∈ 𝑊 → (𝑀 ∘ (reverse‘(𝑀 ∘ (reverse‘𝐴)))) = 𝐴)
33	32	oveq2d 6666	. 2 ⊢ (𝐴 ∈ 𝑊 → ((𝑀 ∘ (reverse‘𝐴)) ++ (𝑀 ∘ (reverse‘(𝑀 ∘ (reverse‘𝐴))))) = ((𝑀 ∘ (reverse‘𝐴)) ++ 𝐴))
34		wrdco 13577	. . . . 5 ⊢ (((reverse‘𝐴) ∈ Word (𝐼 × 2𝑜) ∧ 𝑀:(𝐼 × 2𝑜)⟶(𝐼 × 2𝑜)) → (𝑀 ∘ (reverse‘𝐴)) ∈ Word (𝐼 × 2𝑜))
35	6, 8, 34	sylancl 694	. . . 4 ⊢ (𝐴 ∈ 𝑊 → (𝑀 ∘ (reverse‘𝐴)) ∈ Word (𝐼 × 2𝑜))
36	1	efgrcl 18128	. . . . 5 ⊢ (𝐴 ∈ 𝑊 → (𝐼 ∈ V ∧ 𝑊 = Word (𝐼 × 2𝑜)))
37	36	simprd 479	. . . 4 ⊢ (𝐴 ∈ 𝑊 → 𝑊 = Word (𝐼 × 2𝑜))
38	35, 37	eleqtrrd 2704	. . 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 18140	. . 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 4677	1 ⊢ (𝐴 ∈ 𝑊 → ((𝑀 ∘ (reverse‘𝐴)) ++ 𝐴) ∼ ∅)

Syntax hints:   → wi 4   ∧ wa 384   = wceq 1483   ∈ wcel 1990  Vcvv 3200   ∖ cdif 3571  ∅c0 3915  ⟨cop 4183  ⟨cotp 4185   class class class wbr 4653   ↦ cmpt 4729   I cid 5023   × cxp 5112   ∘ ccom 5118  ⟶wf 5884  ‘cfv 5888  (class class class)co 6650   ↦ cmpt2 6652  1_𝑜c1o 7553  2_𝑜c2o 7554  0cc0 9936  ...cfz 12326  ..^cfzo 12465  #chash 13117  Word cword 13291   ++ cconcat 13293   splice csplice 13296  reversecreverse 13297  ⟨“cs2 13586   ~_FG cefg 18119

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1722  ax-4 1737  ax-5 1839  ax-6 1888  ax-7 1935  ax-8 1992  ax-9 1999  ax-10 2019  ax-11 2034  ax-12 2047  ax-13 2246  ax-ext 2602  ax-rep 4771  ax-sep 4781  ax-nul 4789  ax-pow 4843  ax-pr 4906  ax-un 6949  ax-cnex 9992  ax-resscn 9993  ax-1cn 9994  ax-icn 9995  ax-addcl 9996  ax-addrcl 9997  ax-mulcl 9998  ax-mulrcl 9999  ax-mulcom 10000  ax-addass 10001  ax-mulass 10002  ax-distr 10003  ax-i2m1 10004  ax-1ne0 10005  ax-1rid 10006  ax-rnegex 10007  ax-rrecex 10008  ax-cnre 10009  ax-pre-lttri 10010  ax-pre-lttrn 10011  ax-pre-ltadd 10012  ax-pre-mulgt0 10013

This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3or 1038  df-3an 1039  df-tru 1486  df-ex 1705  df-nf 1710  df-sb 1881  df-eu 2474  df-mo 2475  df-clab 2609  df-cleq 2615  df-clel 2618  df-nfc 2753  df-ne 2795  df-nel 2898  df-ral 2917  df-rex 2918  df-reu 2919  df-rab 2921  df-v 3202  df-sbc 3436  df-csb 3534  df-dif 3577  df-un 3579  df-in 3581  df-ss 3588  df-pss 3590  df-nul 3916  df-if 4087  df-pw 4160  df-sn 4178  df-pr 4180  df-tp 4182  df-op 4184  df-ot 4186  df-uni 4437  df-int 4476  df-iun 4522  df-iin 4523  df-br 4654  df-opab 4713  df-mpt 4730  df-tr 4753  df-id 5024  df-eprel 5029  df-po 5035  df-so 5036  df-fr 5073  df-we 5075  df-xp 5120  df-rel 5121  df-cnv 5122  df-co 5123  df-dm 5124  df-rn 5125  df-res 5126  df-ima 5127  df-pred 5680  df-ord 5726  df-on 5727  df-lim 5728  df-suc 5729  df-iota 5851  df-fun 5890  df-fn 5891  df-f 5892  df-f1 5893  df-fo 5894  df-f1o 5895  df-fv 5896  df-riota 6611  df-ov 6653  df-oprab 6654  df-mpt2 6655  df-om 7066  df-1st 7168  df-2nd 7169  df-wrecs 7407  df-recs 7468  df-rdg 7506  df-1o 7560  df-2o 7561  df-oadd 7564  df-er 7742  df-ec 7744  df-map 7859  df-pm 7860  df-en 7956  df-dom 7957  df-sdom 7958  df-fin 7959  df-card 8765  df-pnf 10076  df-mnf 10077  df-xr 10078  df-ltxr 10079  df-le 10080  df-sub 10268  df-neg 10269  df-nn 11021  df-n0 11293  df-xnn0 11364  df-z 11378  df-uz 11688  df-fz 12327  df-fzo 12466  df-hash 13118  df-word 13299  df-lsw 13300  df-concat 13301  df-s1 13302  df-substr 13303  df-splice 13304  df-reverse 13305  df-s2 13593  df-efg 18122

This theorem is referenced by:  frgp0  18173