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Mirrors > Home > MPE Home > Th. List > clwwlknon1sn | Structured version Visualization version GIF version |
Description: The set of (closed) walks on vertex 𝑋 of length 1 as words over the set of vertices is a singleton containing the singleton word consisting of 𝑋 iff there is a loop at 𝑋. (Contributed by AV, 11-Feb-2022.) (Revised by AV, 25-Feb-2022.) |
Ref | Expression |
---|---|
clwwlknon1.v | ⊢ 𝑉 = (Vtx‘𝐺) |
clwwlknon1.c | ⊢ 𝐶 = (ClWWalksNOn‘𝐺) |
clwwlknon1.e | ⊢ 𝐸 = (Edg‘𝐺) |
Ref | Expression |
---|---|
clwwlknon1sn | ⊢ (𝑋 ∈ 𝑉 → ((𝑋𝐶1) = {〈“𝑋”〉} ↔ {𝑋} ∈ 𝐸)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-nel 3124 | . . . 4 ⊢ ({𝑋} ∉ 𝐸 ↔ ¬ {𝑋} ∈ 𝐸) | |
2 | clwwlknon1.v | . . . . . . . 8 ⊢ 𝑉 = (Vtx‘𝐺) | |
3 | clwwlknon1.c | . . . . . . . 8 ⊢ 𝐶 = (ClWWalksNOn‘𝐺) | |
4 | clwwlknon1.e | . . . . . . . 8 ⊢ 𝐸 = (Edg‘𝐺) | |
5 | 2, 3, 4 | clwwlknon1nloop 27878 | . . . . . . 7 ⊢ ({𝑋} ∉ 𝐸 → (𝑋𝐶1) = ∅) |
6 | 5 | adantl 484 | . . . . . 6 ⊢ ((𝑋 ∈ 𝑉 ∧ {𝑋} ∉ 𝐸) → (𝑋𝐶1) = ∅) |
7 | s1cli 13959 | . . . . . . . . . 10 ⊢ 〈“𝑋”〉 ∈ Word V | |
8 | 7 | elexi 3513 | . . . . . . . . 9 ⊢ 〈“𝑋”〉 ∈ V |
9 | 8 | snnz 4711 | . . . . . . . 8 ⊢ {〈“𝑋”〉} ≠ ∅ |
10 | 9 | nesymi 3073 | . . . . . . 7 ⊢ ¬ ∅ = {〈“𝑋”〉} |
11 | eqeq1 2825 | . . . . . . 7 ⊢ ((𝑋𝐶1) = ∅ → ((𝑋𝐶1) = {〈“𝑋”〉} ↔ ∅ = {〈“𝑋”〉})) | |
12 | 10, 11 | mtbiri 329 | . . . . . 6 ⊢ ((𝑋𝐶1) = ∅ → ¬ (𝑋𝐶1) = {〈“𝑋”〉}) |
13 | 6, 12 | syl 17 | . . . . 5 ⊢ ((𝑋 ∈ 𝑉 ∧ {𝑋} ∉ 𝐸) → ¬ (𝑋𝐶1) = {〈“𝑋”〉}) |
14 | 13 | ex 415 | . . . 4 ⊢ (𝑋 ∈ 𝑉 → ({𝑋} ∉ 𝐸 → ¬ (𝑋𝐶1) = {〈“𝑋”〉})) |
15 | 1, 14 | syl5bir 245 | . . 3 ⊢ (𝑋 ∈ 𝑉 → (¬ {𝑋} ∈ 𝐸 → ¬ (𝑋𝐶1) = {〈“𝑋”〉})) |
16 | 15 | con4d 115 | . 2 ⊢ (𝑋 ∈ 𝑉 → ((𝑋𝐶1) = {〈“𝑋”〉} → {𝑋} ∈ 𝐸)) |
17 | 2, 3, 4 | clwwlknon1loop 27877 | . . 3 ⊢ ((𝑋 ∈ 𝑉 ∧ {𝑋} ∈ 𝐸) → (𝑋𝐶1) = {〈“𝑋”〉}) |
18 | 17 | ex 415 | . 2 ⊢ (𝑋 ∈ 𝑉 → ({𝑋} ∈ 𝐸 → (𝑋𝐶1) = {〈“𝑋”〉})) |
19 | 16, 18 | impbid 214 | 1 ⊢ (𝑋 ∈ 𝑉 → ((𝑋𝐶1) = {〈“𝑋”〉} ↔ {𝑋} ∈ 𝐸)) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ↔ wb 208 ∧ wa 398 = wceq 1537 ∈ wcel 2114 ∉ wnel 3123 Vcvv 3494 ∅c0 4291 {csn 4567 ‘cfv 6355 (class class class)co 7156 1c1 10538 Word cword 13862 〈“cs1 13949 Vtxcvtx 26781 Edgcedg 26832 ClWWalksNOncclwwlknon 27866 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2161 ax-12 2177 ax-ext 2793 ax-rep 5190 ax-sep 5203 ax-nul 5210 ax-pow 5266 ax-pr 5330 ax-un 7461 ax-cnex 10593 ax-resscn 10594 ax-1cn 10595 ax-icn 10596 ax-addcl 10597 ax-addrcl 10598 ax-mulcl 10599 ax-mulrcl 10600 ax-mulcom 10601 ax-addass 10602 ax-mulass 10603 ax-distr 10604 ax-i2m1 10605 ax-1ne0 10606 ax-1rid 10607 ax-rnegex 10608 ax-rrecex 10609 ax-cnre 10610 ax-pre-lttri 10611 ax-pre-lttrn 10612 ax-pre-ltadd 10613 ax-pre-mulgt0 10614 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3or 1084 df-3an 1085 df-tru 1540 df-ex 1781 df-nf 1785 df-sb 2070 df-mo 2622 df-eu 2654 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-ne 3017 df-nel 3124 df-ral 3143 df-rex 3144 df-reu 3145 df-rab 3147 df-v 3496 df-sbc 3773 df-csb 3884 df-dif 3939 df-un 3941 df-in 3943 df-ss 3952 df-pss 3954 df-nul 4292 df-if 4468 df-pw 4541 df-sn 4568 df-pr 4570 df-tp 4572 df-op 4574 df-uni 4839 df-int 4877 df-iun 4921 df-br 5067 df-opab 5129 df-mpt 5147 df-tr 5173 df-id 5460 df-eprel 5465 df-po 5474 df-so 5475 df-fr 5514 df-we 5516 df-xp 5561 df-rel 5562 df-cnv 5563 df-co 5564 df-dm 5565 df-rn 5566 df-res 5567 df-ima 5568 df-pred 6148 df-ord 6194 df-on 6195 df-lim 6196 df-suc 6197 df-iota 6314 df-fun 6357 df-fn 6358 df-f 6359 df-f1 6360 df-fo 6361 df-f1o 6362 df-fv 6363 df-riota 7114 df-ov 7159 df-oprab 7160 df-mpo 7161 df-om 7581 df-1st 7689 df-2nd 7690 df-wrecs 7947 df-recs 8008 df-rdg 8046 df-1o 8102 df-oadd 8106 df-er 8289 df-map 8408 df-en 8510 df-dom 8511 df-sdom 8512 df-fin 8513 df-card 9368 df-pnf 10677 df-mnf 10678 df-xr 10679 df-ltxr 10680 df-le 10681 df-sub 10872 df-neg 10873 df-nn 11639 df-n0 11899 df-xnn0 11969 df-z 11983 df-uz 12245 df-fz 12894 df-fzo 13035 df-hash 13692 df-word 13863 df-lsw 13915 df-s1 13950 df-clwwlk 27760 df-clwwlkn 27803 df-clwwlknon 27867 |
This theorem is referenced by: (None) |
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