![]() |
Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
|
Mirrors > Home > MPE Home > Th. List > cshws0 | Structured version Visualization version GIF version |
Description: The size of the set of (different!) words resulting by cyclically shifting an empty word is 0. (Contributed by AV, 8-Nov-2018.) |
Ref | Expression |
---|---|
cshwrepswhash1.m | ⊢ 𝑀 = {𝑤 ∈ Word 𝑉 ∣ ∃𝑛 ∈ (0..^(#‘𝑊))(𝑊 cyclShift 𝑛) = 𝑤} |
Ref | Expression |
---|---|
cshws0 | ⊢ (𝑊 = ∅ → (#‘𝑀) = 0) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | cshwrepswhash1.m | . . . 4 ⊢ 𝑀 = {𝑤 ∈ Word 𝑉 ∣ ∃𝑛 ∈ (0..^(#‘𝑊))(𝑊 cyclShift 𝑛) = 𝑤} | |
2 | 0ex 4718 | . . . . . . . . . . . 12 ⊢ ∅ ∈ V | |
3 | eleq1 2676 | . . . . . . . . . . . 12 ⊢ (𝑊 = ∅ → (𝑊 ∈ V ↔ ∅ ∈ V)) | |
4 | 2, 3 | mpbiri 247 | . . . . . . . . . . 11 ⊢ (𝑊 = ∅ → 𝑊 ∈ V) |
5 | hasheq0 13015 | . . . . . . . . . . . 12 ⊢ (𝑊 ∈ V → ((#‘𝑊) = 0 ↔ 𝑊 = ∅)) | |
6 | 5 | bicomd 212 | . . . . . . . . . . 11 ⊢ (𝑊 ∈ V → (𝑊 = ∅ ↔ (#‘𝑊) = 0)) |
7 | 4, 6 | syl 17 | . . . . . . . . . 10 ⊢ (𝑊 = ∅ → (𝑊 = ∅ ↔ (#‘𝑊) = 0)) |
8 | 7 | ibi 255 | . . . . . . . . 9 ⊢ (𝑊 = ∅ → (#‘𝑊) = 0) |
9 | 8 | oveq2d 6565 | . . . . . . . 8 ⊢ (𝑊 = ∅ → (0..^(#‘𝑊)) = (0..^0)) |
10 | fzo0 12361 | . . . . . . . 8 ⊢ (0..^0) = ∅ | |
11 | 9, 10 | syl6eq 2660 | . . . . . . 7 ⊢ (𝑊 = ∅ → (0..^(#‘𝑊)) = ∅) |
12 | 11 | rexeqdv 3122 | . . . . . 6 ⊢ (𝑊 = ∅ → (∃𝑛 ∈ (0..^(#‘𝑊))(𝑊 cyclShift 𝑛) = 𝑤 ↔ ∃𝑛 ∈ ∅ (𝑊 cyclShift 𝑛) = 𝑤)) |
13 | 12 | rabbidv 3164 | . . . . 5 ⊢ (𝑊 = ∅ → {𝑤 ∈ Word 𝑉 ∣ ∃𝑛 ∈ (0..^(#‘𝑊))(𝑊 cyclShift 𝑛) = 𝑤} = {𝑤 ∈ Word 𝑉 ∣ ∃𝑛 ∈ ∅ (𝑊 cyclShift 𝑛) = 𝑤}) |
14 | rex0 3894 | . . . . . . . 8 ⊢ ¬ ∃𝑛 ∈ ∅ (𝑊 cyclShift 𝑛) = 𝑤 | |
15 | 14 | a1i 11 | . . . . . . 7 ⊢ (𝑊 = ∅ → ¬ ∃𝑛 ∈ ∅ (𝑊 cyclShift 𝑛) = 𝑤) |
16 | 15 | ralrimivw 2950 | . . . . . 6 ⊢ (𝑊 = ∅ → ∀𝑤 ∈ Word 𝑉 ¬ ∃𝑛 ∈ ∅ (𝑊 cyclShift 𝑛) = 𝑤) |
17 | rabeq0 3911 | . . . . . 6 ⊢ ({𝑤 ∈ Word 𝑉 ∣ ∃𝑛 ∈ ∅ (𝑊 cyclShift 𝑛) = 𝑤} = ∅ ↔ ∀𝑤 ∈ Word 𝑉 ¬ ∃𝑛 ∈ ∅ (𝑊 cyclShift 𝑛) = 𝑤) | |
18 | 16, 17 | sylibr 223 | . . . . 5 ⊢ (𝑊 = ∅ → {𝑤 ∈ Word 𝑉 ∣ ∃𝑛 ∈ ∅ (𝑊 cyclShift 𝑛) = 𝑤} = ∅) |
19 | 13, 18 | eqtrd 2644 | . . . 4 ⊢ (𝑊 = ∅ → {𝑤 ∈ Word 𝑉 ∣ ∃𝑛 ∈ (0..^(#‘𝑊))(𝑊 cyclShift 𝑛) = 𝑤} = ∅) |
20 | 1, 19 | syl5eq 2656 | . . 3 ⊢ (𝑊 = ∅ → 𝑀 = ∅) |
21 | 20 | fveq2d 6107 | . 2 ⊢ (𝑊 = ∅ → (#‘𝑀) = (#‘∅)) |
22 | hash0 13019 | . 2 ⊢ (#‘∅) = 0 | |
23 | 21, 22 | syl6eq 2660 | 1 ⊢ (𝑊 = ∅ → (#‘𝑀) = 0) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ↔ wb 195 = wceq 1475 ∈ wcel 1977 ∀wral 2896 ∃wrex 2897 {crab 2900 Vcvv 3173 ∅c0 3874 ‘cfv 5804 (class class class)co 6549 0cc0 9815 ..^cfzo 12334 #chash 12979 Word cword 13146 cyclShift ccsh 13385 |
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-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-uni 4373 df-int 4411 df-iun 4457 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-er 7629 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-z 11255 df-uz 11564 df-fz 12198 df-fzo 12335 df-hash 12980 |
This theorem is referenced by: (None) |
Copyright terms: Public domain | W3C validator |