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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 6845 | . . . . . . . . . 10 ⊢ ( I ‘Word (𝐼 × 2o)) ⊆ Word (𝐼 × 2o) | |
3 | 1, 2 | eqsstri 3955 | . . . . . . . . 9 ⊢ 𝑊 ⊆ Word (𝐼 × 2o) |
4 | 3 | sseli 3917 | . . . . . . . 8 ⊢ (𝐴 ∈ 𝑊 → 𝐴 ∈ Word (𝐼 × 2o)) |
5 | revcl 14474 | . . . . . . . 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 19319 | . . . . . . 7 ⊢ 𝑀:(𝐼 × 2o)⟶(𝐼 × 2o) |
9 | revco 14547 | . . . . . . 7 ⊢ (((reverse‘𝐴) ∈ Word (𝐼 × 2o) ∧ 𝑀:(𝐼 × 2o)⟶(𝐼 × 2o)) → (𝑀 ∘ (reverse‘(reverse‘𝐴))) = (reverse‘(𝑀 ∘ (reverse‘𝐴)))) | |
10 | 6, 8, 9 | sylancl 586 | . . . . . 6 ⊢ (𝐴 ∈ 𝑊 → (𝑀 ∘ (reverse‘(reverse‘𝐴))) = (reverse‘(𝑀 ∘ (reverse‘𝐴)))) |
11 | revrev 14480 | . . . . . . . 8 ⊢ (𝐴 ∈ Word (𝐼 × 2o) → (reverse‘(reverse‘𝐴)) = 𝐴) | |
12 | 4, 11 | syl 17 | . . . . . . 7 ⊢ (𝐴 ∈ 𝑊 → (reverse‘(reverse‘𝐴)) = 𝐴) |
13 | 12 | coeq2d 5771 | . . . . . 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 5771 | . . . 4 ⊢ (𝐴 ∈ 𝑊 → (𝑀 ∘ (reverse‘(𝑀 ∘ (reverse‘𝐴)))) = (𝑀 ∘ (𝑀 ∘ 𝐴))) |
16 | wrdf 14222 | . . . . . . . . 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 6961 | . . . . . . 7 ⊢ ((𝐴 ∈ 𝑊 ∧ 𝑐 ∈ (0..^(♯‘𝐴))) → (𝐴‘𝑐) ∈ (𝐼 × 2o)) |
19 | 7 | efgmnvl 19320 | . . . . . . 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 5174 | . . . . 5 ⊢ (𝐴 ∈ 𝑊 → (𝑐 ∈ (0..^(♯‘𝐴)) ↦ (𝑀‘(𝑀‘(𝐴‘𝑐)))) = (𝑐 ∈ (0..^(♯‘𝐴)) ↦ (𝐴‘𝑐))) |
22 | 8 | ffvelrni 6960 | . . . . . . 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 7005 | . . . . . . 7 ⊢ ((𝑀:(𝐼 × 2o)⟶(𝐼 × 2o) ∧ 𝐴:(0..^(♯‘𝐴))⟶(𝐼 × 2o)) → (𝑀 ∘ 𝐴) = (𝑐 ∈ (0..^(♯‘𝐴)) ↦ (𝑀‘(𝐴‘𝑐)))) | |
25 | 8, 17, 24 | sylancr 587 | . . . . . 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 6837 | . . . . . 6 ⊢ (𝐴 ∈ 𝑊 → 𝑀 = (𝑎 ∈ (𝐼 × 2o) ↦ (𝑀‘𝑎))) |
28 | fveq2 6774 | . . . . . 6 ⊢ (𝑎 = (𝑀‘(𝐴‘𝑐)) → (𝑀‘𝑎) = (𝑀‘(𝑀‘(𝐴‘𝑐)))) | |
29 | 23, 25, 27, 28 | fmptco 7001 | . . . . 5 ⊢ (𝐴 ∈ 𝑊 → (𝑀 ∘ (𝑀 ∘ 𝐴)) = (𝑐 ∈ (0..^(♯‘𝐴)) ↦ (𝑀‘(𝑀‘(𝐴‘𝑐))))) |
30 | 17 | feqmptd 6837 | . . . . 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 7291 | . 2 ⊢ (𝐴 ∈ 𝑊 → ((𝑀 ∘ (reverse‘𝐴)) ++ (𝑀 ∘ (reverse‘(𝑀 ∘ (reverse‘𝐴))))) = ((𝑀 ∘ (reverse‘𝐴)) ++ 𝐴)) |
34 | wrdco 14544 | . . . . 5 ⊢ (((reverse‘𝐴) ∈ Word (𝐼 × 2o) ∧ 𝑀:(𝐼 × 2o)⟶(𝐼 × 2o)) → (𝑀 ∘ (reverse‘𝐴)) ∈ Word (𝐼 × 2o)) | |
35 | 6, 8, 34 | sylancl 586 | . . . 4 ⊢ (𝐴 ∈ 𝑊 → (𝑀 ∘ (reverse‘𝐴)) ∈ Word (𝐼 × 2o)) |
36 | 1 | efgrcl 19321 | . . . . 5 ⊢ (𝐴 ∈ 𝑊 → (𝐼 ∈ V ∧ 𝑊 = Word (𝐼 × 2o))) |
37 | 36 | simprd 496 | . . . 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 19333 | . . 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 5098 | 1 ⊢ (𝐴 ∈ 𝑊 → ((𝑀 ∘ (reverse‘𝐴)) ++ 𝐴) ∼ ∅) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 396 = wceq 1539 ∈ wcel 2106 Vcvv 3432 ∖ cdif 3884 ∅c0 4256 〈cop 4567 〈cotp 4569 class class class wbr 5074 ↦ cmpt 5157 I cid 5488 × cxp 5587 ∘ ccom 5593 ⟶wf 6429 ‘cfv 6433 (class class class)co 7275 ∈ cmpo 7277 1oc1o 8290 2oc2o 8291 0cc0 10871 ...cfz 13239 ..^cfzo 13382 ♯chash 14044 Word cword 14217 ++ cconcat 14273 splice csplice 14462 reversecreverse 14471 〈“cs2 14554 ~FG cefg 19312 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2709 ax-rep 5209 ax-sep 5223 ax-nul 5230 ax-pow 5288 ax-pr 5352 ax-un 7588 ax-cnex 10927 ax-resscn 10928 ax-1cn 10929 ax-icn 10930 ax-addcl 10931 ax-addrcl 10932 ax-mulcl 10933 ax-mulrcl 10934 ax-mulcom 10935 ax-addass 10936 ax-mulass 10937 ax-distr 10938 ax-i2m1 10939 ax-1ne0 10940 ax-1rid 10941 ax-rnegex 10942 ax-rrecex 10943 ax-cnre 10944 ax-pre-lttri 10945 ax-pre-lttrn 10946 ax-pre-ltadd 10947 ax-pre-mulgt0 10948 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3or 1087 df-3an 1088 df-tru 1542 df-fal 1552 df-ex 1783 df-nf 1787 df-sb 2068 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2816 df-nfc 2889 df-ne 2944 df-nel 3050 df-ral 3069 df-rex 3070 df-reu 3072 df-rab 3073 df-v 3434 df-sbc 3717 df-csb 3833 df-dif 3890 df-un 3892 df-in 3894 df-ss 3904 df-pss 3906 df-nul 4257 df-if 4460 df-pw 4535 df-sn 4562 df-pr 4564 df-op 4568 df-ot 4570 df-uni 4840 df-int 4880 df-iun 4926 df-iin 4927 df-br 5075 df-opab 5137 df-mpt 5158 df-tr 5192 df-id 5489 df-eprel 5495 df-po 5503 df-so 5504 df-fr 5544 df-we 5546 df-xp 5595 df-rel 5596 df-cnv 5597 df-co 5598 df-dm 5599 df-rn 5600 df-res 5601 df-ima 5602 df-pred 6202 df-ord 6269 df-on 6270 df-lim 6271 df-suc 6272 df-iota 6391 df-fun 6435 df-fn 6436 df-f 6437 df-f1 6438 df-fo 6439 df-f1o 6440 df-fv 6441 df-riota 7232 df-ov 7278 df-oprab 7279 df-mpo 7280 df-om 7713 df-1st 7831 df-2nd 7832 df-frecs 8097 df-wrecs 8128 df-recs 8202 df-rdg 8241 df-1o 8297 df-2o 8298 df-er 8498 df-ec 8500 df-map 8617 df-en 8734 df-dom 8735 df-sdom 8736 df-fin 8737 df-card 9697 df-pnf 11011 df-mnf 11012 df-xr 11013 df-ltxr 11014 df-le 11015 df-sub 11207 df-neg 11208 df-nn 11974 df-n0 12234 df-xnn0 12306 df-z 12320 df-uz 12583 df-fz 13240 df-fzo 13383 df-hash 14045 df-word 14218 df-lsw 14266 df-concat 14274 df-s1 14301 df-substr 14354 df-pfx 14384 df-splice 14463 df-reverse 14472 df-s2 14561 df-efg 19315 |
This theorem is referenced by: frgp0 19366 |
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