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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 28034 | . . . 4 ⊢ (𝑋 ∈ 𝑉 → (𝑋𝐶1) = {𝑤 ∈ Word 𝑉 ∣ (𝑤 = 〈“𝑋”〉 ∧ {𝑋} ∈ 𝐸)}) |
5 | 4 | adantr 484 | . . 3 ⊢ ((𝑋 ∈ 𝑉 ∧ {𝑋} ∉ 𝐸) → (𝑋𝐶1) = {𝑤 ∈ Word 𝑉 ∣ (𝑤 = 〈“𝑋”〉 ∧ {𝑋} ∈ 𝐸)}) |
6 | df-nel 3039 | . . . . . . . . 9 ⊢ ({𝑋} ∉ 𝐸 ↔ ¬ {𝑋} ∈ 𝐸) | |
7 | 6 | biimpi 219 | . . . . . . . 8 ⊢ ({𝑋} ∉ 𝐸 → ¬ {𝑋} ∈ 𝐸) |
8 | 7 | olcd 873 | . . . . . . 7 ⊢ ({𝑋} ∉ 𝐸 → (¬ 𝑤 = 〈“𝑋”〉 ∨ ¬ {𝑋} ∈ 𝐸)) |
9 | 8 | ad2antlr 727 | . . . . . 6 ⊢ (((𝑋 ∈ 𝑉 ∧ {𝑋} ∉ 𝐸) ∧ 𝑤 ∈ Word 𝑉) → (¬ 𝑤 = 〈“𝑋”〉 ∨ ¬ {𝑋} ∈ 𝐸)) |
10 | ianor 981 | . . . . . 6 ⊢ (¬ (𝑤 = 〈“𝑋”〉 ∧ {𝑋} ∈ 𝐸) ↔ (¬ 𝑤 = 〈“𝑋”〉 ∨ ¬ {𝑋} ∈ 𝐸)) | |
11 | 9, 10 | sylibr 237 | . . . . 5 ⊢ (((𝑋 ∈ 𝑉 ∧ {𝑋} ∉ 𝐸) ∧ 𝑤 ∈ Word 𝑉) → ¬ (𝑤 = 〈“𝑋”〉 ∧ {𝑋} ∈ 𝐸)) |
12 | 11 | ralrimiva 3096 | . . . 4 ⊢ ((𝑋 ∈ 𝑉 ∧ {𝑋} ∉ 𝐸) → ∀𝑤 ∈ Word 𝑉 ¬ (𝑤 = 〈“𝑋”〉 ∧ {𝑋} ∈ 𝐸)) |
13 | rabeq0 4273 | . . . 4 ⊢ ({𝑤 ∈ Word 𝑉 ∣ (𝑤 = 〈“𝑋”〉 ∧ {𝑋} ∈ 𝐸)} = ∅ ↔ ∀𝑤 ∈ Word 𝑉 ¬ (𝑤 = 〈“𝑋”〉 ∧ {𝑋} ∈ 𝐸)) | |
14 | 12, 13 | sylibr 237 | . . 3 ⊢ ((𝑋 ∈ 𝑉 ∧ {𝑋} ∉ 𝐸) → {𝑤 ∈ Word 𝑉 ∣ (𝑤 = 〈“𝑋”〉 ∧ {𝑋} ∈ 𝐸)} = ∅) |
15 | 5, 14 | eqtrd 2773 | . 2 ⊢ ((𝑋 ∈ 𝑉 ∧ {𝑋} ∉ 𝐸) → (𝑋𝐶1) = ∅) |
16 | 2 | oveqi 7183 | . . . 4 ⊢ (𝑋𝐶1) = (𝑋(ClWWalksNOn‘𝐺)1) |
17 | 1 | eleq2i 2824 | . . . . . . . 8 ⊢ (𝑋 ∈ 𝑉 ↔ 𝑋 ∈ (Vtx‘𝐺)) |
18 | 17 | notbii 323 | . . . . . . 7 ⊢ (¬ 𝑋 ∈ 𝑉 ↔ ¬ 𝑋 ∈ (Vtx‘𝐺)) |
19 | 18 | biimpi 219 | . . . . . 6 ⊢ (¬ 𝑋 ∈ 𝑉 → ¬ 𝑋 ∈ (Vtx‘𝐺)) |
20 | 19 | intnanrd 493 | . . . . 5 ⊢ (¬ 𝑋 ∈ 𝑉 → ¬ (𝑋 ∈ (Vtx‘𝐺) ∧ 1 ∈ ℕ)) |
21 | clwwlknon0 28030 | . . . . 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 2785 | . . 3 ⊢ (¬ 𝑋 ∈ 𝑉 → (𝑋𝐶1) = ∅) |
24 | 23 | adantr 484 | . 2 ⊢ ((¬ 𝑋 ∈ 𝑉 ∧ {𝑋} ∉ 𝐸) → (𝑋𝐶1) = ∅) |
25 | 15, 24 | pm2.61ian 812 | 1 ⊢ ({𝑋} ∉ 𝐸 → (𝑋𝐶1) = ∅) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ∧ wa 399 ∨ wo 846 = wceq 1542 ∈ wcel 2114 ∉ wnel 3038 ∀wral 3053 {crab 3057 ∅c0 4211 {csn 4516 ‘cfv 6339 (class class class)co 7170 1c1 10616 ℕcn 11716 Word cword 13955 〈“cs1 14038 Vtxcvtx 26941 Edgcedg 26992 ClWWalksNOncclwwlknon 28024 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1975 ax-7 2020 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2162 ax-12 2179 ax-ext 2710 ax-rep 5154 ax-sep 5167 ax-nul 5174 ax-pow 5232 ax-pr 5296 ax-un 7479 ax-cnex 10671 ax-resscn 10672 ax-1cn 10673 ax-icn 10674 ax-addcl 10675 ax-addrcl 10676 ax-mulcl 10677 ax-mulrcl 10678 ax-mulcom 10679 ax-addass 10680 ax-mulass 10681 ax-distr 10682 ax-i2m1 10683 ax-1ne0 10684 ax-1rid 10685 ax-rnegex 10686 ax-rrecex 10687 ax-cnre 10688 ax-pre-lttri 10689 ax-pre-lttrn 10690 ax-pre-ltadd 10691 ax-pre-mulgt0 10692 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 847 df-3or 1089 df-3an 1090 df-tru 1545 df-fal 1555 df-ex 1787 df-nf 1791 df-sb 2075 df-mo 2540 df-eu 2570 df-clab 2717 df-cleq 2730 df-clel 2811 df-nfc 2881 df-ne 2935 df-nel 3039 df-ral 3058 df-rex 3059 df-reu 3060 df-rab 3062 df-v 3400 df-sbc 3681 df-csb 3791 df-dif 3846 df-un 3848 df-in 3850 df-ss 3860 df-pss 3862 df-nul 4212 df-if 4415 df-pw 4490 df-sn 4517 df-pr 4519 df-tp 4521 df-op 4523 df-uni 4797 df-int 4837 df-iun 4883 df-br 5031 df-opab 5093 df-mpt 5111 df-tr 5137 df-id 5429 df-eprel 5434 df-po 5442 df-so 5443 df-fr 5483 df-we 5485 df-xp 5531 df-rel 5532 df-cnv 5533 df-co 5534 df-dm 5535 df-rn 5536 df-res 5537 df-ima 5538 df-pred 6129 df-ord 6175 df-on 6176 df-lim 6177 df-suc 6178 df-iota 6297 df-fun 6341 df-fn 6342 df-f 6343 df-f1 6344 df-fo 6345 df-f1o 6346 df-fv 6347 df-riota 7127 df-ov 7173 df-oprab 7174 df-mpo 7175 df-om 7600 df-1st 7714 df-2nd 7715 df-wrecs 7976 df-recs 8037 df-rdg 8075 df-1o 8131 df-oadd 8135 df-er 8320 df-map 8439 df-en 8556 df-dom 8557 df-sdom 8558 df-fin 8559 df-card 9441 df-pnf 10755 df-mnf 10756 df-xr 10757 df-ltxr 10758 df-le 10759 df-sub 10950 df-neg 10951 df-nn 11717 df-n0 11977 df-xnn0 12049 df-z 12063 df-uz 12325 df-fz 12982 df-fzo 13125 df-hash 13783 df-word 13956 df-lsw 14004 df-s1 14039 df-clwwlk 27919 df-clwwlkn 27962 df-clwwlknon 28025 |
This theorem is referenced by: clwwlknon1sn 28037 clwwlknon1le1 28038 |
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