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Mirrors > Home > MPE Home > Th. List > clwwlknon1nloop | Structured version Visualization version GIF version |
Description: If there is no loop at vertex 𝑋, the set of (closed) walks on 𝑋 of length 1 as words over the set of vertices is empty. (Contributed by AV, 11-Feb-2022.) (Revised by AV, 25-Mar-2022.) |
Ref | Expression |
---|---|
clwwlknon1.v | ⊢ 𝑉 = (Vtx‘𝐺) |
clwwlknon1.c | ⊢ 𝐶 = (ClWWalksNOn‘𝐺) |
clwwlknon1.e | ⊢ 𝐸 = (Edg‘𝐺) |
Ref | Expression |
---|---|
clwwlknon1nloop | ⊢ ({𝑋} ∉ 𝐸 → (𝑋𝐶1) = ∅) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | clwwlknon1.v | . . . . 5 ⊢ 𝑉 = (Vtx‘𝐺) | |
2 | clwwlknon1.c | . . . . 5 ⊢ 𝐶 = (ClWWalksNOn‘𝐺) | |
3 | clwwlknon1.e | . . . . 5 ⊢ 𝐸 = (Edg‘𝐺) | |
4 | 1, 2, 3 | clwwlknon1 28362 | . . . 4 ⊢ (𝑋 ∈ 𝑉 → (𝑋𝐶1) = {𝑤 ∈ Word 𝑉 ∣ (𝑤 = 〈“𝑋”〉 ∧ {𝑋} ∈ 𝐸)}) |
5 | 4 | adantr 480 | . . 3 ⊢ ((𝑋 ∈ 𝑉 ∧ {𝑋} ∉ 𝐸) → (𝑋𝐶1) = {𝑤 ∈ Word 𝑉 ∣ (𝑤 = 〈“𝑋”〉 ∧ {𝑋} ∈ 𝐸)}) |
6 | df-nel 3049 | . . . . . . . . 9 ⊢ ({𝑋} ∉ 𝐸 ↔ ¬ {𝑋} ∈ 𝐸) | |
7 | 6 | biimpi 215 | . . . . . . . 8 ⊢ ({𝑋} ∉ 𝐸 → ¬ {𝑋} ∈ 𝐸) |
8 | 7 | olcd 870 | . . . . . . 7 ⊢ ({𝑋} ∉ 𝐸 → (¬ 𝑤 = 〈“𝑋”〉 ∨ ¬ {𝑋} ∈ 𝐸)) |
9 | 8 | ad2antlr 723 | . . . . . 6 ⊢ (((𝑋 ∈ 𝑉 ∧ {𝑋} ∉ 𝐸) ∧ 𝑤 ∈ Word 𝑉) → (¬ 𝑤 = 〈“𝑋”〉 ∨ ¬ {𝑋} ∈ 𝐸)) |
10 | ianor 978 | . . . . . 6 ⊢ (¬ (𝑤 = 〈“𝑋”〉 ∧ {𝑋} ∈ 𝐸) ↔ (¬ 𝑤 = 〈“𝑋”〉 ∨ ¬ {𝑋} ∈ 𝐸)) | |
11 | 9, 10 | sylibr 233 | . . . . 5 ⊢ (((𝑋 ∈ 𝑉 ∧ {𝑋} ∉ 𝐸) ∧ 𝑤 ∈ Word 𝑉) → ¬ (𝑤 = 〈“𝑋”〉 ∧ {𝑋} ∈ 𝐸)) |
12 | 11 | ralrimiva 3107 | . . . 4 ⊢ ((𝑋 ∈ 𝑉 ∧ {𝑋} ∉ 𝐸) → ∀𝑤 ∈ Word 𝑉 ¬ (𝑤 = 〈“𝑋”〉 ∧ {𝑋} ∈ 𝐸)) |
13 | rabeq0 4315 | . . . 4 ⊢ ({𝑤 ∈ Word 𝑉 ∣ (𝑤 = 〈“𝑋”〉 ∧ {𝑋} ∈ 𝐸)} = ∅ ↔ ∀𝑤 ∈ Word 𝑉 ¬ (𝑤 = 〈“𝑋”〉 ∧ {𝑋} ∈ 𝐸)) | |
14 | 12, 13 | sylibr 233 | . . 3 ⊢ ((𝑋 ∈ 𝑉 ∧ {𝑋} ∉ 𝐸) → {𝑤 ∈ Word 𝑉 ∣ (𝑤 = 〈“𝑋”〉 ∧ {𝑋} ∈ 𝐸)} = ∅) |
15 | 5, 14 | eqtrd 2778 | . 2 ⊢ ((𝑋 ∈ 𝑉 ∧ {𝑋} ∉ 𝐸) → (𝑋𝐶1) = ∅) |
16 | 2 | oveqi 7268 | . . . 4 ⊢ (𝑋𝐶1) = (𝑋(ClWWalksNOn‘𝐺)1) |
17 | 1 | eleq2i 2830 | . . . . . . . 8 ⊢ (𝑋 ∈ 𝑉 ↔ 𝑋 ∈ (Vtx‘𝐺)) |
18 | 17 | notbii 319 | . . . . . . 7 ⊢ (¬ 𝑋 ∈ 𝑉 ↔ ¬ 𝑋 ∈ (Vtx‘𝐺)) |
19 | 18 | biimpi 215 | . . . . . 6 ⊢ (¬ 𝑋 ∈ 𝑉 → ¬ 𝑋 ∈ (Vtx‘𝐺)) |
20 | 19 | intnanrd 489 | . . . . 5 ⊢ (¬ 𝑋 ∈ 𝑉 → ¬ (𝑋 ∈ (Vtx‘𝐺) ∧ 1 ∈ ℕ)) |
21 | clwwlknon0 28358 | . . . . 5 ⊢ (¬ (𝑋 ∈ (Vtx‘𝐺) ∧ 1 ∈ ℕ) → (𝑋(ClWWalksNOn‘𝐺)1) = ∅) | |
22 | 20, 21 | syl 17 | . . . 4 ⊢ (¬ 𝑋 ∈ 𝑉 → (𝑋(ClWWalksNOn‘𝐺)1) = ∅) |
23 | 16, 22 | syl5eq 2791 | . . 3 ⊢ (¬ 𝑋 ∈ 𝑉 → (𝑋𝐶1) = ∅) |
24 | 23 | adantr 480 | . 2 ⊢ ((¬ 𝑋 ∈ 𝑉 ∧ {𝑋} ∉ 𝐸) → (𝑋𝐶1) = ∅) |
25 | 15, 24 | pm2.61ian 808 | 1 ⊢ ({𝑋} ∉ 𝐸 → (𝑋𝐶1) = ∅) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ∧ wa 395 ∨ wo 843 = wceq 1539 ∈ wcel 2108 ∉ wnel 3048 ∀wral 3063 {crab 3067 ∅c0 4253 {csn 4558 ‘cfv 6418 (class class class)co 7255 1c1 10803 ℕcn 11903 Word cword 14145 〈“cs1 14228 Vtxcvtx 27269 Edgcedg 27320 ClWWalksNOncclwwlknon 28352 |
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-uni 4837 df-int 4877 df-iun 4923 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-oadd 8271 df-er 8456 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-s1 14229 df-clwwlk 28247 df-clwwlkn 28290 df-clwwlknon 28353 |
This theorem is referenced by: clwwlknon1sn 28365 clwwlknon1le1 28366 |
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