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Mirrors > Home > MPE Home > Th. List > erclwwlkneqlen | Structured version Visualization version GIF version |
Description: If two classes are equivalent regarding ∼, then they are words of the same length. (Contributed by Alexander van der Vekens, 8-Apr-2018.) (Revised by AV, 30-Apr-2021.) |
Ref | Expression |
---|---|
erclwwlkn.w | ⊢ 𝑊 = (𝑁 ClWWalksN 𝐺) |
erclwwlkn.r | ⊢ ∼ = {〈𝑡, 𝑢〉 ∣ (𝑡 ∈ 𝑊 ∧ 𝑢 ∈ 𝑊 ∧ ∃𝑛 ∈ (0...𝑁)𝑡 = (𝑢 cyclShift 𝑛))} |
Ref | Expression |
---|---|
erclwwlkneqlen | ⊢ ((𝑇 ∈ 𝑋 ∧ 𝑈 ∈ 𝑌) → (𝑇 ∼ 𝑈 → (♯‘𝑇) = (♯‘𝑈))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | erclwwlkn.w | . . 3 ⊢ 𝑊 = (𝑁 ClWWalksN 𝐺) | |
2 | erclwwlkn.r | . . 3 ⊢ ∼ = {〈𝑡, 𝑢〉 ∣ (𝑡 ∈ 𝑊 ∧ 𝑢 ∈ 𝑊 ∧ ∃𝑛 ∈ (0...𝑁)𝑡 = (𝑢 cyclShift 𝑛))} | |
3 | 1, 2 | erclwwlkneq 28439 | . 2 ⊢ ((𝑇 ∈ 𝑋 ∧ 𝑈 ∈ 𝑌) → (𝑇 ∼ 𝑈 ↔ (𝑇 ∈ 𝑊 ∧ 𝑈 ∈ 𝑊 ∧ ∃𝑛 ∈ (0...𝑁)𝑇 = (𝑈 cyclShift 𝑛)))) |
4 | fveq2 6766 | . . . . 5 ⊢ (𝑇 = (𝑈 cyclShift 𝑛) → (♯‘𝑇) = (♯‘(𝑈 cyclShift 𝑛))) | |
5 | eqid 2738 | . . . . . . . . 9 ⊢ (Vtx‘𝐺) = (Vtx‘𝐺) | |
6 | 5 | clwwlknwrd 28406 | . . . . . . . 8 ⊢ (𝑈 ∈ (𝑁 ClWWalksN 𝐺) → 𝑈 ∈ Word (Vtx‘𝐺)) |
7 | 6, 1 | eleq2s 2857 | . . . . . . 7 ⊢ (𝑈 ∈ 𝑊 → 𝑈 ∈ Word (Vtx‘𝐺)) |
8 | 7 | adantl 482 | . . . . . 6 ⊢ ((𝑇 ∈ 𝑊 ∧ 𝑈 ∈ 𝑊) → 𝑈 ∈ Word (Vtx‘𝐺)) |
9 | elfzelz 13266 | . . . . . 6 ⊢ (𝑛 ∈ (0...𝑁) → 𝑛 ∈ ℤ) | |
10 | cshwlen 14522 | . . . . . 6 ⊢ ((𝑈 ∈ Word (Vtx‘𝐺) ∧ 𝑛 ∈ ℤ) → (♯‘(𝑈 cyclShift 𝑛)) = (♯‘𝑈)) | |
11 | 8, 9, 10 | syl2an 596 | . . . . 5 ⊢ (((𝑇 ∈ 𝑊 ∧ 𝑈 ∈ 𝑊) ∧ 𝑛 ∈ (0...𝑁)) → (♯‘(𝑈 cyclShift 𝑛)) = (♯‘𝑈)) |
12 | 4, 11 | sylan9eqr 2800 | . . . 4 ⊢ ((((𝑇 ∈ 𝑊 ∧ 𝑈 ∈ 𝑊) ∧ 𝑛 ∈ (0...𝑁)) ∧ 𝑇 = (𝑈 cyclShift 𝑛)) → (♯‘𝑇) = (♯‘𝑈)) |
13 | 12 | rexlimdva2 3214 | . . 3 ⊢ ((𝑇 ∈ 𝑊 ∧ 𝑈 ∈ 𝑊) → (∃𝑛 ∈ (0...𝑁)𝑇 = (𝑈 cyclShift 𝑛) → (♯‘𝑇) = (♯‘𝑈))) |
14 | 13 | 3impia 1116 | . 2 ⊢ ((𝑇 ∈ 𝑊 ∧ 𝑈 ∈ 𝑊 ∧ ∃𝑛 ∈ (0...𝑁)𝑇 = (𝑈 cyclShift 𝑛)) → (♯‘𝑇) = (♯‘𝑈)) |
15 | 3, 14 | syl6bi 252 | 1 ⊢ ((𝑇 ∈ 𝑋 ∧ 𝑈 ∈ 𝑌) → (𝑇 ∼ 𝑈 → (♯‘𝑇) = (♯‘𝑈))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 396 ∧ w3a 1086 = wceq 1539 ∈ wcel 2106 ∃wrex 3065 class class class wbr 5073 {copab 5135 ‘cfv 6426 (class class class)co 7267 0cc0 10881 ℤcz 12329 ...cfz 13249 ♯chash 14054 Word cword 14227 cyclShift ccsh 14511 Vtxcvtx 27376 ClWWalksN cclwwlkn 28396 |
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 5208 ax-sep 5221 ax-nul 5228 ax-pow 5286 ax-pr 5350 ax-un 7578 ax-cnex 10937 ax-resscn 10938 ax-1cn 10939 ax-icn 10940 ax-addcl 10941 ax-addrcl 10942 ax-mulcl 10943 ax-mulrcl 10944 ax-mulcom 10945 ax-addass 10946 ax-mulass 10947 ax-distr 10948 ax-i2m1 10949 ax-1ne0 10950 ax-1rid 10951 ax-rnegex 10952 ax-rrecex 10953 ax-cnre 10954 ax-pre-lttri 10955 ax-pre-lttrn 10956 ax-pre-ltadd 10957 ax-pre-mulgt0 10958 ax-pre-sup 10959 |
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 3071 df-rmo 3072 df-rab 3073 df-v 3431 df-sbc 3716 df-csb 3832 df-dif 3889 df-un 3891 df-in 3893 df-ss 3903 df-pss 3905 df-nul 4257 df-if 4460 df-pw 4535 df-sn 4562 df-pr 4564 df-op 4568 df-uni 4840 df-int 4880 df-iun 4926 df-br 5074 df-opab 5136 df-mpt 5157 df-tr 5191 df-id 5484 df-eprel 5490 df-po 5498 df-so 5499 df-fr 5539 df-we 5541 df-xp 5590 df-rel 5591 df-cnv 5592 df-co 5593 df-dm 5594 df-rn 5595 df-res 5596 df-ima 5597 df-pred 6195 df-ord 6262 df-on 6263 df-lim 6264 df-suc 6265 df-iota 6384 df-fun 6428 df-fn 6429 df-f 6430 df-f1 6431 df-fo 6432 df-f1o 6433 df-fv 6434 df-riota 7224 df-ov 7270 df-oprab 7271 df-mpo 7272 df-om 7703 df-1st 7820 df-2nd 7821 df-frecs 8084 df-wrecs 8115 df-recs 8189 df-rdg 8228 df-1o 8284 df-er 8485 df-map 8604 df-en 8721 df-dom 8722 df-sdom 8723 df-fin 8724 df-sup 9188 df-inf 9189 df-card 9707 df-pnf 11021 df-mnf 11022 df-xr 11023 df-ltxr 11024 df-le 11025 df-sub 11217 df-neg 11218 df-div 11643 df-nn 11984 df-n0 12244 df-z 12330 df-uz 12593 df-rp 12741 df-fz 13250 df-fzo 13393 df-fl 13522 df-mod 13600 df-hash 14055 df-word 14228 df-concat 14284 df-substr 14364 df-pfx 14394 df-csh 14512 df-clwwlk 28354 df-clwwlkn 28397 |
This theorem is referenced by: erclwwlknsym 28442 erclwwlkntr 28443 |
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