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| Mirrors > Home > MPE Home > Th. List > eupthres | Structured version Visualization version GIF version | ||
| Description: The restriction 〈𝐻, 𝑄〉 of an Eulerian path 〈𝐹, 𝑃〉 to an initial segment of the path (of length 𝑁) forms an Eulerian path on the subgraph 𝑆 consisting of the edges in the initial segment. (Contributed by Mario Carneiro, 12-Mar-2015.) (Revised by Mario Carneiro, 3-May-2015.) (Revised by AV, 6-Mar-2021.) Hypothesis revised using the prefix operation. (Revised by AV, 30-Nov-2022.) |
| Ref | Expression |
|---|---|
| eupth0.v | ⊢ 𝑉 = (Vtx‘𝐺) |
| eupth0.i | ⊢ 𝐼 = (iEdg‘𝐺) |
| eupthres.d | ⊢ (𝜑 → 𝐹(EulerPaths‘𝐺)𝑃) |
| eupthres.n | ⊢ (𝜑 → 𝑁 ∈ (0..^(♯‘𝐹))) |
| eupthres.e | ⊢ (𝜑 → (iEdg‘𝑆) = (𝐼 ↾ (𝐹 “ (0..^𝑁)))) |
| eupthres.h | ⊢ 𝐻 = (𝐹 prefix 𝑁) |
| eupthres.q | ⊢ 𝑄 = (𝑃 ↾ (0...𝑁)) |
| eupthres.s | ⊢ (Vtx‘𝑆) = 𝑉 |
| Ref | Expression |
|---|---|
| eupthres | ⊢ (𝜑 → 𝐻(EulerPaths‘𝑆)𝑄) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eupth0.v | . . 3 ⊢ 𝑉 = (Vtx‘𝐺) | |
| 2 | eupth0.i | . . 3 ⊢ 𝐼 = (iEdg‘𝐺) | |
| 3 | eupthres.d | . . . 4 ⊢ (𝜑 → 𝐹(EulerPaths‘𝐺)𝑃) | |
| 4 | eupthistrl 30869 | . . . 4 ⊢ (𝐹(EulerPaths‘𝐺)𝑃 → 𝐹(Trails‘𝐺)𝑃) | |
| 5 | trliswlk 30337 | . . . 4 ⊢ (𝐹(Trails‘𝐺)𝑃 → 𝐹(Walks‘𝐺)𝑃) | |
| 6 | 3, 4, 5 | 3syl 19 | . . 3 ⊢ (𝜑 → 𝐹(Walks‘𝐺)𝑃) |
| 7 | eupthres.n | . . 3 ⊢ (𝜑 → 𝑁 ∈ (0..^(♯‘𝐹))) | |
| 8 | eupthres.s | . . . 4 ⊢ (Vtx‘𝑆) = 𝑉 | |
| 9 | 8 | a1i 11 | . . 3 ⊢ (𝜑 → (Vtx‘𝑆) = 𝑉) |
| 10 | eupthres.e | . . 3 ⊢ (𝜑 → (iEdg‘𝑆) = (𝐼 ↾ (𝐹 “ (0..^𝑁)))) | |
| 11 | eupthres.h | . . 3 ⊢ 𝐻 = (𝐹 prefix 𝑁) | |
| 12 | eupthres.q | . . 3 ⊢ 𝑄 = (𝑃 ↾ (0...𝑁)) | |
| 13 | 1, 2, 6, 7, 9, 10, 11, 12 | wlkres 30306 | . 2 ⊢ (𝜑 → 𝐻(Walks‘𝑆)𝑄) |
| 14 | 3, 4 | syl 18 | . . 3 ⊢ (𝜑 → 𝐹(Trails‘𝐺)𝑃) |
| 15 | 1, 2, 14, 7, 11 | trlreslem 30339 | . 2 ⊢ (𝜑 → 𝐻:(0..^(♯‘𝐻))⟶1-1ontodom (𝐼 ↾ (𝐹 “ (0..^𝑁)))) |
| 16 | eqid 2763 | . . . 4 ⊢ (iEdg‘𝑆) = (iEdg‘𝑆) | |
| 17 | 16 | iseupthf1o 30860 | . . 3 ⊢ (𝐻(EulerPaths‘𝑆)𝑄 ↔ (𝐻(Walks‘𝑆)𝑄 ∧ 𝐻:(0..^(♯‘𝐻))⟶1-1ontodom (iEdg‘𝑆))) |
| 18 | 10 | dmeqd 5899 | . . . . 5 ⊢ (𝜑 → dom (iEdg‘𝑆) = dom (𝐼 ↾ (𝐹 “ (0..^𝑁)))) |
| 19 | 18 | f1oeq3d 6851 | . . . 4 ⊢ (𝜑 → (𝐻:(0..^(♯‘𝐻))⟶1-1ontodom (iEdg‘𝑆) ↔ 𝐻:(0..^(♯‘𝐻))⟶1-1ontodom (𝐼 ↾ (𝐹 “ (0..^𝑁))))) |
| 20 | 19 | anbi2d 642 | . . 3 ⊢ (𝜑 → ((𝐻(Walks‘𝑆)𝑄 ∧ 𝐻:(0..^(♯‘𝐻))⟶1-1ontodom (iEdg‘𝑆)) ↔ (𝐻(Walks‘𝑆)𝑄 ∧ 𝐻:(0..^(♯‘𝐻))⟶1-1ontodom (𝐼 ↾ (𝐹 “ (0..^𝑁)))))) |
| 21 | 17, 20 | bitrid 286 | . 2 ⊢ (𝜑 → (𝐻(EulerPaths‘𝑆)𝑄 ↔ (𝐻(Walks‘𝑆)𝑄 ∧ 𝐻:(0..^(♯‘𝐻))⟶1-1ontodom (𝐼 ↾ (𝐹 “ (0..^𝑁)))))) |
| 22 | 13, 15, 21 | mpbir2and 726 | 1 ⊢ (𝜑 → 𝐻(EulerPaths‘𝑆)𝑄) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 = wceq 1570 ∈ wcel 2147 class class class wbr 5108 dom cdm 5658 ↾ cres 5660 “ cima 5661 ⟶1-1ontowf1o 6565 ‘cfv 6566 (class class class)co 7451 0cc0 11239 ...cfz 13679 ..^cfzo 13828 ♯chash 14515 prefix cpfx 14862 Vtxcvtx 29631 iEdgciedg 29632 Walkscwlks 30234 Trailsctrls 30330 EulerPathsceupth 30855 |
| 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 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-10 2180 ax-11 2197 ax-12 2216 ax-ext 2735 ax-rep 5238 ax-sep 5255 ax-nul 5266 ax-pow 5334 ax-pr 5398 ax-un 7783 ax-cnex 11295 ax-resscn 11296 ax-1cn 11297 ax-icn 11298 ax-addcl 11299 ax-addrcl 11300 ax-mulcl 11301 ax-mulrcl 11302 ax-mulcom 11303 ax-addass 11304 ax-mulass 11305 ax-distr 11306 ax-i2m1 11307 ax-1ne0 11308 ax-1rid 11309 ax-rnegex 11310 ax-rrecex 11311 ax-cnre 11312 ax-pre-lttri 11313 ax-pre-lttrn 11314 ax-pre-ltadd 11315 ax-pre-mulgt0 11316 |
| 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 2102 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ne 2960 df-nel 3066 df-ral 3081 df-rex 3091 df-reu 3370 df-rab 3417 df-v 3456 df-sbc 3743 df-csb 3852 df-ss 3901 df-pss 4017 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-pw 4562 df-sn 4589 df-pr 4591 df-op 4841 df-uni 4873 df-int 4913 df-iun 4958 df-br 5109 df-opab 5174 df-mpt 5193 df-tr 5219 df-id 5553 df-eprel 5558 df-po 5566 df-so 5567 df-fr 5611 df-we 5613 df-xp 5664 df-rel 5665 df-cnv 5666 df-co 5667 df-dm 5668 df-rn 5669 df-res 5670 df-ima 5671 df-pred 6330 df-ord 6391 df-on 6392 df-lim 6393 df-suc 6394 df-iota 6520 df-fun 6568 df-fn 6569 df-f 6570 df-f1 6571 df-fo 6572 df-f1o 6573 df-fv 6574 df-riota 7408 df-ov 7454 df-oprab 7455 df-mpo 7456 df-om 7912 df-1st 8035 df-2nd 8036 df-frecs 8337 df-wrecs 8368 df-recs 8417 df-rdg 8456 df-1o 8514 df-er 8755 df-map 8887 df-pm 8888 df-en 9012 df-dom 9013 df-sdom 9014 df-fin 9015 df-card 10057 df-pnf 11384 df-mnf 11385 df-xr 11386 df-ltxr 11387 df-le 11388 df-sub 11582 df-neg 11583 df-nn 12376 df-n0 12647 df-z 12734 df-uz 13006 df-fz 13680 df-fzo 13829 df-hash 14516 df-word 14700 df-substr 14831 df-pfx 14863 df-wlks 30237 df-trls 30332 df-eupth 30856 |
| This theorem is used by: eucrct2eupth1 30902 |
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