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Mirrors > Home > MPE Home > Th. List > efginvrel1 | Structured version Visualization version GIF version |
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.) |
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)”〉〉))) |
Ref | Expression |
---|---|
efginvrel1 | ⊢ (𝐴 ∈ 𝑊 → ((𝑀 ∘ (reverse‘𝐴)) ++ 𝐴) ∼ ∅) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | efgval.w | . . . . . . . . . 10 ⊢ 𝑊 = ( I ‘Word (𝐼 × 2o)) | |
2 | fviss 6827 | . . . . . . . . . 10 ⊢ ( I ‘Word (𝐼 × 2o)) ⊆ Word (𝐼 × 2o) | |
3 | 1, 2 | eqsstri 3951 | . . . . . . . . 9 ⊢ 𝑊 ⊆ Word (𝐼 × 2o) |
4 | 3 | sseli 3913 | . . . . . . . 8 ⊢ (𝐴 ∈ 𝑊 → 𝐴 ∈ Word (𝐼 × 2o)) |
5 | revcl 14402 | . . . . . . . 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 19234 | . . . . . . 7 ⊢ 𝑀:(𝐼 × 2o)⟶(𝐼 × 2o) |
9 | revco 14475 | . . . . . . 7 ⊢ (((reverse‘𝐴) ∈ Word (𝐼 × 2o) ∧ 𝑀:(𝐼 × 2o)⟶(𝐼 × 2o)) → (𝑀 ∘ (reverse‘(reverse‘𝐴))) = (reverse‘(𝑀 ∘ (reverse‘𝐴)))) | |
10 | 6, 8, 9 | sylancl 585 | . . . . . 6 ⊢ (𝐴 ∈ 𝑊 → (𝑀 ∘ (reverse‘(reverse‘𝐴))) = (reverse‘(𝑀 ∘ (reverse‘𝐴)))) |
11 | revrev 14408 | . . . . . . . 8 ⊢ (𝐴 ∈ Word (𝐼 × 2o) → (reverse‘(reverse‘𝐴)) = 𝐴) | |
12 | 4, 11 | syl 17 | . . . . . . 7 ⊢ (𝐴 ∈ 𝑊 → (reverse‘(reverse‘𝐴)) = 𝐴) |
13 | 12 | coeq2d 5760 | . . . . . 6 ⊢ (𝐴 ∈ 𝑊 → (𝑀 ∘ (reverse‘(reverse‘𝐴))) = (𝑀 ∘ 𝐴)) |
14 | 10, 13 | eqtr3d 2780 | . . . . 5 ⊢ (𝐴 ∈ 𝑊 → (reverse‘(𝑀 ∘ (reverse‘𝐴))) = (𝑀 ∘ 𝐴)) |
15 | 14 | coeq2d 5760 | . . . 4 ⊢ (𝐴 ∈ 𝑊 → (𝑀 ∘ (reverse‘(𝑀 ∘ (reverse‘𝐴)))) = (𝑀 ∘ (𝑀 ∘ 𝐴))) |
16 | wrdf 14150 | . . . . . . . . 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 6943 | . . . . . . 7 ⊢ ((𝐴 ∈ 𝑊 ∧ 𝑐 ∈ (0..^(♯‘𝐴))) → (𝐴‘𝑐) ∈ (𝐼 × 2o)) |
19 | 7 | efgmnvl 19235 | . . . . . . 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 5170 | . . . . 5 ⊢ (𝐴 ∈ 𝑊 → (𝑐 ∈ (0..^(♯‘𝐴)) ↦ (𝑀‘(𝑀‘(𝐴‘𝑐)))) = (𝑐 ∈ (0..^(♯‘𝐴)) ↦ (𝐴‘𝑐))) |
22 | 8 | ffvelrni 6942 | . . . . . . 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 6987 | . . . . . . 7 ⊢ ((𝑀:(𝐼 × 2o)⟶(𝐼 × 2o) ∧ 𝐴:(0..^(♯‘𝐴))⟶(𝐼 × 2o)) → (𝑀 ∘ 𝐴) = (𝑐 ∈ (0..^(♯‘𝐴)) ↦ (𝑀‘(𝐴‘𝑐)))) | |
25 | 8, 17, 24 | sylancr 586 | . . . . . 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 6819 | . . . . . 6 ⊢ (𝐴 ∈ 𝑊 → 𝑀 = (𝑎 ∈ (𝐼 × 2o) ↦ (𝑀‘𝑎))) |
28 | fveq2 6756 | . . . . . 6 ⊢ (𝑎 = (𝑀‘(𝐴‘𝑐)) → (𝑀‘𝑎) = (𝑀‘(𝑀‘(𝐴‘𝑐)))) | |
29 | 23, 25, 27, 28 | fmptco 6983 | . . . . 5 ⊢ (𝐴 ∈ 𝑊 → (𝑀 ∘ (𝑀 ∘ 𝐴)) = (𝑐 ∈ (0..^(♯‘𝐴)) ↦ (𝑀‘(𝑀‘(𝐴‘𝑐))))) |
30 | 17 | feqmptd 6819 | . . . . 5 ⊢ (𝐴 ∈ 𝑊 → 𝐴 = (𝑐 ∈ (0..^(♯‘𝐴)) ↦ (𝐴‘𝑐))) |
31 | 21, 29, 30 | 3eqtr4d 2788 | . . . 4 ⊢ (𝐴 ∈ 𝑊 → (𝑀 ∘ (𝑀 ∘ 𝐴)) = 𝐴) |
32 | 15, 31 | eqtrd 2778 | . . 3 ⊢ (𝐴 ∈ 𝑊 → (𝑀 ∘ (reverse‘(𝑀 ∘ (reverse‘𝐴)))) = 𝐴) |
33 | 32 | oveq2d 7271 | . 2 ⊢ (𝐴 ∈ 𝑊 → ((𝑀 ∘ (reverse‘𝐴)) ++ (𝑀 ∘ (reverse‘(𝑀 ∘ (reverse‘𝐴))))) = ((𝑀 ∘ (reverse‘𝐴)) ++ 𝐴)) |
34 | wrdco 14472 | . . . . 5 ⊢ (((reverse‘𝐴) ∈ Word (𝐼 × 2o) ∧ 𝑀:(𝐼 × 2o)⟶(𝐼 × 2o)) → (𝑀 ∘ (reverse‘𝐴)) ∈ Word (𝐼 × 2o)) | |
35 | 6, 8, 34 | sylancl 585 | . . . 4 ⊢ (𝐴 ∈ 𝑊 → (𝑀 ∘ (reverse‘𝐴)) ∈ Word (𝐼 × 2o)) |
36 | 1 | efgrcl 19236 | . . . . 5 ⊢ (𝐴 ∈ 𝑊 → (𝐼 ∈ V ∧ 𝑊 = Word (𝐼 × 2o))) |
37 | 36 | simprd 495 | . . . 4 ⊢ (𝐴 ∈ 𝑊 → 𝑊 = Word (𝐼 × 2o)) |
38 | 35, 37 | eleqtrrd 2842 | . . 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 19248 | . . 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 5094 | 1 ⊢ (𝐴 ∈ 𝑊 → ((𝑀 ∘ (reverse‘𝐴)) ++ 𝐴) ∼ ∅) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 395 = wceq 1539 ∈ wcel 2108 Vcvv 3422 ∖ cdif 3880 ∅c0 4253 〈cop 4564 〈cotp 4566 class class class wbr 5070 ↦ cmpt 5153 I cid 5479 × cxp 5578 ∘ ccom 5584 ⟶wf 6414 ‘cfv 6418 (class class class)co 7255 ∈ cmpo 7257 1oc1o 8260 2oc2o 8261 0cc0 10802 ...cfz 13168 ..^cfzo 13311 ♯chash 13972 Word cword 14145 ++ cconcat 14201 splice csplice 14390 reversecreverse 14399 〈“cs2 14482 ~FG cefg 19227 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1799 ax-4 1813 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2110 ax-9 2118 ax-10 2139 ax-11 2156 ax-12 2173 ax-ext 2709 ax-rep 5205 ax-sep 5218 ax-nul 5225 ax-pow 5283 ax-pr 5347 ax-un 7566 ax-cnex 10858 ax-resscn 10859 ax-1cn 10860 ax-icn 10861 ax-addcl 10862 ax-addrcl 10863 ax-mulcl 10864 ax-mulrcl 10865 ax-mulcom 10866 ax-addass 10867 ax-mulass 10868 ax-distr 10869 ax-i2m1 10870 ax-1ne0 10871 ax-1rid 10872 ax-rnegex 10873 ax-rrecex 10874 ax-cnre 10875 ax-pre-lttri 10876 ax-pre-lttrn 10877 ax-pre-ltadd 10878 ax-pre-mulgt0 10879 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3or 1086 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1784 df-nf 1788 df-sb 2069 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2817 df-nfc 2888 df-ne 2943 df-nel 3049 df-ral 3068 df-rex 3069 df-reu 3070 df-rab 3072 df-v 3424 df-sbc 3712 df-csb 3829 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-pss 3902 df-nul 4254 df-if 4457 df-pw 4532 df-sn 4559 df-pr 4561 df-tp 4563 df-op 4565 df-ot 4567 df-uni 4837 df-int 4877 df-iun 4923 df-iin 4924 df-br 5071 df-opab 5133 df-mpt 5154 df-tr 5188 df-id 5480 df-eprel 5486 df-po 5494 df-so 5495 df-fr 5535 df-we 5537 df-xp 5586 df-rel 5587 df-cnv 5588 df-co 5589 df-dm 5590 df-rn 5591 df-res 5592 df-ima 5593 df-pred 6191 df-ord 6254 df-on 6255 df-lim 6256 df-suc 6257 df-iota 6376 df-fun 6420 df-fn 6421 df-f 6422 df-f1 6423 df-fo 6424 df-f1o 6425 df-fv 6426 df-riota 7212 df-ov 7258 df-oprab 7259 df-mpo 7260 df-om 7688 df-1st 7804 df-2nd 7805 df-frecs 8068 df-wrecs 8099 df-recs 8173 df-rdg 8212 df-1o 8267 df-2o 8268 df-er 8456 df-ec 8458 df-map 8575 df-en 8692 df-dom 8693 df-sdom 8694 df-fin 8695 df-card 9628 df-pnf 10942 df-mnf 10943 df-xr 10944 df-ltxr 10945 df-le 10946 df-sub 11137 df-neg 11138 df-nn 11904 df-n0 12164 df-xnn0 12236 df-z 12250 df-uz 12512 df-fz 13169 df-fzo 13312 df-hash 13973 df-word 14146 df-lsw 14194 df-concat 14202 df-s1 14229 df-substr 14282 df-pfx 14312 df-splice 14391 df-reverse 14400 df-s2 14489 df-efg 19230 |
This theorem is referenced by: frgp0 19281 |
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