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| Mirrors > Home > MPE Home > Th. List > 3trlond | Structured version Visualization version GIF version | ||
| Description: A trail of length 3 from one vertex to another, different vertex via a third vertex. (Contributed by AV, 8-Feb-2021.) (Revised by AV, 24-Mar-2021.) |
| Ref | Expression |
|---|---|
| 3wlkd.p | ⊢ 𝑃 = 〈“𝐴𝐵𝐶𝐷”〉 |
| 3wlkd.f | ⊢ 𝐹 = 〈“𝐽𝐾𝐿”〉 |
| 3wlkd.s | ⊢ (𝜑 → ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑉) ∧ (𝐶 ∈ 𝑉 ∧ 𝐷 ∈ 𝑉))) |
| 3wlkd.n | ⊢ (𝜑 → ((𝐴 ≠ 𝐵 ∧ 𝐴 ≠ 𝐶) ∧ (𝐵 ≠ 𝐶 ∧ 𝐵 ≠ 𝐷) ∧ 𝐶 ≠ 𝐷)) |
| 3wlkd.e | ⊢ (𝜑 → ({𝐴, 𝐵} ⊆ (𝐼‘𝐽) ∧ {𝐵, 𝐶} ⊆ (𝐼‘𝐾) ∧ {𝐶, 𝐷} ⊆ (𝐼‘𝐿))) |
| 3wlkd.v | ⊢ 𝑉 = (Vtx‘𝐺) |
| 3wlkd.i | ⊢ 𝐼 = (iEdg‘𝐺) |
| 3trld.n | ⊢ (𝜑 → (𝐽 ≠ 𝐾 ∧ 𝐽 ≠ 𝐿 ∧ 𝐾 ≠ 𝐿)) |
| Ref | Expression |
|---|---|
| 3trlond | ⊢ (𝜑 → 𝐹(𝐴(TrailsOn‘𝐺)𝐷)𝑃) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 3wlkd.p | . . 3 ⊢ 𝑃 = 〈“𝐴𝐵𝐶𝐷”〉 | |
| 2 | 3wlkd.f | . . 3 ⊢ 𝐹 = 〈“𝐽𝐾𝐿”〉 | |
| 3 | 3wlkd.s | . . 3 ⊢ (𝜑 → ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑉) ∧ (𝐶 ∈ 𝑉 ∧ 𝐷 ∈ 𝑉))) | |
| 4 | 3wlkd.n | . . 3 ⊢ (𝜑 → ((𝐴 ≠ 𝐵 ∧ 𝐴 ≠ 𝐶) ∧ (𝐵 ≠ 𝐶 ∧ 𝐵 ≠ 𝐷) ∧ 𝐶 ≠ 𝐷)) | |
| 5 | 3wlkd.e | . . 3 ⊢ (𝜑 → ({𝐴, 𝐵} ⊆ (𝐼‘𝐽) ∧ {𝐵, 𝐶} ⊆ (𝐼‘𝐾) ∧ {𝐶, 𝐷} ⊆ (𝐼‘𝐿))) | |
| 6 | 3wlkd.v | . . 3 ⊢ 𝑉 = (Vtx‘𝐺) | |
| 7 | 3wlkd.i | . . 3 ⊢ 𝐼 = (iEdg‘𝐺) | |
| 8 | 1, 2, 3, 4, 5, 6, 7 | 3wlkond 30651 | . 2 ⊢ (𝜑 → 𝐹(𝐴(WalksOn‘𝐺)𝐷)𝑃) |
| 9 | 3trld.n | . . 3 ⊢ (𝜑 → (𝐽 ≠ 𝐾 ∧ 𝐽 ≠ 𝐿 ∧ 𝐾 ≠ 𝐿)) | |
| 10 | 1, 2, 3, 4, 5, 6, 7, 9 | 3trld 30652 | . 2 ⊢ (𝜑 → 𝐹(Trails‘𝐺)𝑃) |
| 11 | 3 | simplld 780 | . . 3 ⊢ (𝜑 → 𝐴 ∈ 𝑉) |
| 12 | 3 | simprrd 786 | . . 3 ⊢ (𝜑 → 𝐷 ∈ 𝑉) |
| 13 | s3cli 14952 | . . . . . 6 ⊢ 〈“𝐽𝐾𝐿”〉 ∈ Word V | |
| 14 | 2, 13 | eqeltri 2856 | . . . . 5 ⊢ 𝐹 ∈ Word V |
| 15 | s4cli 14953 | . . . . . 6 ⊢ 〈“𝐴𝐵𝐶𝐷”〉 ∈ Word V | |
| 16 | 1, 15 | eqeltri 2856 | . . . . 5 ⊢ 𝑃 ∈ Word V |
| 17 | 14, 16 | pm3.2i 476 | . . . 4 ⊢ (𝐹 ∈ Word V ∧ 𝑃 ∈ Word V) |
| 18 | 17 | a1i 11 | . . 3 ⊢ (𝜑 → (𝐹 ∈ Word V ∧ 𝑃 ∈ Word V)) |
| 19 | 6 | istrlson 30168 | . . 3 ⊢ (((𝐴 ∈ 𝑉 ∧ 𝐷 ∈ 𝑉) ∧ (𝐹 ∈ Word V ∧ 𝑃 ∈ Word V)) → (𝐹(𝐴(TrailsOn‘𝐺)𝐷)𝑃 ↔ (𝐹(𝐴(WalksOn‘𝐺)𝐷)𝑃 ∧ 𝐹(Trails‘𝐺)𝑃))) |
| 20 | 11, 12, 18, 19 | syl21anc 851 | . 2 ⊢ (𝜑 → (𝐹(𝐴(TrailsOn‘𝐺)𝐷)𝑃 ↔ (𝐹(𝐴(WalksOn‘𝐺)𝐷)𝑃 ∧ 𝐹(Trails‘𝐺)𝑃))) |
| 21 | 8, 10, 20 | mpbir2and 726 | 1 ⊢ (𝜑 → 𝐹(𝐴(TrailsOn‘𝐺)𝐷)𝑃) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 ∧ wa 401 ∧ w3a 1103 = wceq 1570 ∈ wcel 2145 ≠ wne 2955 Vcvv 3450 ⊆ wss 3899 {cpr 4586 class class class wbr 5103 ‘cfv 6533 (class class class)co 7413 Word cword 14578 〈“cs3 14913 〈“cs4 14914 Vtxcvtx 29453 iEdgciedg 29454 WalksOncwlkson 30057 Trailsctrls 30152 TrailsOnctrlson 30153 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2732 ax-rep 5232 ax-sep 5251 ax-nul 5263 ax-pow 5330 ax-pr 5398 ax-un 7736 ax-cnex 11180 ax-resscn 11181 ax-1cn 11182 ax-icn 11183 ax-addcl 11184 ax-addrcl 11185 ax-mulcl 11186 ax-mulrcl 11187 ax-mulcom 11188 ax-addass 11189 ax-mulass 11190 ax-distr 11191 ax-i2m1 11192 ax-1ne0 11193 ax-1rid 11194 ax-rnegex 11195 ax-rrecex 11196 ax-cnre 11197 ax-pre-lttri 11198 ax-pre-lttrn 11199 ax-pre-ltadd 11200 ax-pre-mulgt0 11201 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-ifp 1079 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-nel 3062 df-ral 3077 df-rex 3087 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-tp 4589 df-op 4591 df-uni 4868 df-int 4908 df-iun 4953 df-br 5104 df-opab 5168 df-mpt 5187 df-tr 5213 df-id 5550 df-eprel 5555 df-po 5563 df-so 5564 df-fr 5608 df-we 5610 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-res 5667 df-ima 5668 df-pred 6299 df-ord 6360 df-on 6361 df-lim 6362 df-suc 6363 df-iota 6489 df-fun 6535 df-fn 6536 df-f 6537 df-f1 6538 df-fo 6539 df-f1o 6540 df-fv 6541 df-riota 7370 df-ov 7416 df-oprab 7417 df-mpo 7418 df-om 7863 df-1st 7986 df-2nd 7987 df-frecs 8280 df-wrecs 8311 df-recs 8360 df-rdg 8399 df-1o 8455 df-er 8696 df-map 8828 df-en 8953 df-dom 8954 df-sdom 8955 df-fin 8956 df-card 9944 df-pnf 11269 df-mnf 11270 df-xr 11271 df-ltxr 11272 df-le 11273 df-sub 11467 df-neg 11468 df-nn 12258 df-2 12327 df-3 12328 df-4 12329 df-n0 12529 df-z 12616 df-uz 12888 df-fz 13562 df-fzo 13710 df-hash 14395 df-word 14579 df-lsw 14628 df-concat 14636 df-s1 14663 df-s2 14919 df-s3 14920 df-s4 14921 df-wlks 30059 df-wlkson 30060 df-trls 30154 df-trlson 30155 |
| This theorem is used by: 3pthond 30655 3spthond 30657 |
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