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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 30286 | . . . 4 ⊢ (𝐹(EulerPaths‘𝐺)𝑃 → 𝐹(Trails‘𝐺)𝑃) | |
| 5 | trliswlk 29769 | . . . 4 ⊢ (𝐹(Trails‘𝐺)𝑃 → 𝐹(Walks‘𝐺)𝑃) | |
| 6 | 3, 4, 5 | 3syl 18 | . . 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 29742 | . 2 ⊢ (𝜑 → 𝐻(Walks‘𝑆)𝑄) |
| 14 | 3, 4 | syl 17 | . . 3 ⊢ (𝜑 → 𝐹(Trails‘𝐺)𝑃) |
| 15 | 1, 2, 14, 7, 11 | trlreslem 29771 | . 2 ⊢ (𝜑 → 𝐻:(0..^(♯‘𝐻))–1-1-onto→dom (𝐼 ↾ (𝐹 “ (0..^𝑁)))) |
| 16 | eqid 2736 | . . . 4 ⊢ (iEdg‘𝑆) = (iEdg‘𝑆) | |
| 17 | 16 | iseupthf1o 30277 | . . 3 ⊢ (𝐻(EulerPaths‘𝑆)𝑄 ↔ (𝐻(Walks‘𝑆)𝑄 ∧ 𝐻:(0..^(♯‘𝐻))–1-1-onto→dom (iEdg‘𝑆))) |
| 18 | 10 | dmeqd 5854 | . . . . 5 ⊢ (𝜑 → dom (iEdg‘𝑆) = dom (𝐼 ↾ (𝐹 “ (0..^𝑁)))) |
| 19 | 18 | f1oeq3d 6771 | . . . 4 ⊢ (𝜑 → (𝐻:(0..^(♯‘𝐻))–1-1-onto→dom (iEdg‘𝑆) ↔ 𝐻:(0..^(♯‘𝐻))–1-1-onto→dom (𝐼 ↾ (𝐹 “ (0..^𝑁))))) |
| 20 | 19 | anbi2d 630 | . . 3 ⊢ (𝜑 → ((𝐻(Walks‘𝑆)𝑄 ∧ 𝐻:(0..^(♯‘𝐻))–1-1-onto→dom (iEdg‘𝑆)) ↔ (𝐻(Walks‘𝑆)𝑄 ∧ 𝐻:(0..^(♯‘𝐻))–1-1-onto→dom (𝐼 ↾ (𝐹 “ (0..^𝑁)))))) |
| 21 | 17, 20 | bitrid 283 | . 2 ⊢ (𝜑 → (𝐻(EulerPaths‘𝑆)𝑄 ↔ (𝐻(Walks‘𝑆)𝑄 ∧ 𝐻:(0..^(♯‘𝐻))–1-1-onto→dom (𝐼 ↾ (𝐹 “ (0..^𝑁)))))) |
| 22 | 13, 15, 21 | mpbir2and 713 | 1 ⊢ (𝜑 → 𝐻(EulerPaths‘𝑆)𝑄) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 = wceq 1541 ∈ wcel 2113 class class class wbr 5098 dom cdm 5624 ↾ cres 5626 “ cima 5627 –1-1-onto→wf1o 6491 ‘cfv 6492 (class class class)co 7358 0cc0 11026 ...cfz 13423 ..^cfzo 13570 ♯chash 14253 prefix cpfx 14594 Vtxcvtx 29069 iEdgciedg 29070 Walkscwlks 29670 Trailsctrls 29762 EulerPathsceupth 30272 |
| 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 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-10 2146 ax-11 2162 ax-12 2184 ax-ext 2708 ax-rep 5224 ax-sep 5241 ax-nul 5251 ax-pow 5310 ax-pr 5377 ax-un 7680 ax-cnex 11082 ax-resscn 11083 ax-1cn 11084 ax-icn 11085 ax-addcl 11086 ax-addrcl 11087 ax-mulcl 11088 ax-mulrcl 11089 ax-mulcom 11090 ax-addass 11091 ax-mulass 11092 ax-distr 11093 ax-i2m1 11094 ax-1ne0 11095 ax-1rid 11096 ax-rnegex 11097 ax-rrecex 11098 ax-cnre 11099 ax-pre-lttri 11100 ax-pre-lttrn 11101 ax-pre-ltadd 11102 ax-pre-mulgt0 11103 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-ifp 1063 df-3or 1087 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2539 df-eu 2569 df-clab 2715 df-cleq 2728 df-clel 2811 df-nfc 2885 df-ne 2933 df-nel 3037 df-ral 3052 df-rex 3061 df-reu 3351 df-rab 3400 df-v 3442 df-sbc 3741 df-csb 3850 df-dif 3904 df-un 3906 df-in 3908 df-ss 3918 df-pss 3921 df-nul 4286 df-if 4480 df-pw 4556 df-sn 4581 df-pr 4583 df-op 4587 df-uni 4864 df-int 4903 df-iun 4948 df-br 5099 df-opab 5161 df-mpt 5180 df-tr 5206 df-id 5519 df-eprel 5524 df-po 5532 df-so 5533 df-fr 5577 df-we 5579 df-xp 5630 df-rel 5631 df-cnv 5632 df-co 5633 df-dm 5634 df-rn 5635 df-res 5636 df-ima 5637 df-pred 6259 df-ord 6320 df-on 6321 df-lim 6322 df-suc 6323 df-iota 6448 df-fun 6494 df-fn 6495 df-f 6496 df-f1 6497 df-fo 6498 df-f1o 6499 df-fv 6500 df-riota 7315 df-ov 7361 df-oprab 7362 df-mpo 7363 df-om 7809 df-1st 7933 df-2nd 7934 df-frecs 8223 df-wrecs 8254 df-recs 8303 df-rdg 8341 df-1o 8397 df-er 8635 df-map 8765 df-pm 8766 df-en 8884 df-dom 8885 df-sdom 8886 df-fin 8887 df-card 9851 df-pnf 11168 df-mnf 11169 df-xr 11170 df-ltxr 11171 df-le 11172 df-sub 11366 df-neg 11367 df-nn 12146 df-n0 12402 df-z 12489 df-uz 12752 df-fz 13424 df-fzo 13571 df-hash 14254 df-word 14437 df-substr 14565 df-pfx 14595 df-wlks 29673 df-trls 29764 df-eupth 30273 |
| This theorem is referenced by: eucrct2eupth1 30319 |
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