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| Mirrors > Home > MPE Home > Th. List > eucrct2eupth1 | Structured version Visualization version GIF version | ||
| Description: Removing one edge (𝐼‘(𝐹‘𝑁)) from a nonempty graph 𝐺 with an Eulerian circuit 〈𝐹, 𝑃〉 results in a graph 𝑆 with an Eulerian path 〈𝐻, 𝑄〉. This is the special case of eucrct2eupth 30334 (with 𝐽 = (𝑁 − 1)) where the last segment/edge of the circuit is removed. (Contributed by AV, 11-Mar-2021.) Hypothesis revised using the prefix operation. (Revised by AV, 30-Nov-2022.) |
| Ref | Expression |
|---|---|
| eucrct2eupth1.v | ⊢ 𝑉 = (Vtx‘𝐺) |
| eucrct2eupth1.i | ⊢ 𝐼 = (iEdg‘𝐺) |
| eucrct2eupth1.d | ⊢ (𝜑 → 𝐹(EulerPaths‘𝐺)𝑃) |
| eucrct2eupth1.c | ⊢ (𝜑 → 𝐹(Circuits‘𝐺)𝑃) |
| eucrct2eupth1.s | ⊢ (Vtx‘𝑆) = 𝑉 |
| eucrct2eupth1.g | ⊢ (𝜑 → 0 < (♯‘𝐹)) |
| eucrct2eupth1.n | ⊢ (𝜑 → 𝑁 = ((♯‘𝐹) − 1)) |
| eucrct2eupth1.e | ⊢ (𝜑 → (iEdg‘𝑆) = (𝐼 ↾ (𝐹 “ (0..^𝑁)))) |
| eucrct2eupth1.h | ⊢ 𝐻 = (𝐹 prefix 𝑁) |
| eucrct2eupth1.q | ⊢ 𝑄 = (𝑃 ↾ (0...𝑁)) |
| Ref | Expression |
|---|---|
| eucrct2eupth1 | ⊢ (𝜑 → 𝐻(EulerPaths‘𝑆)𝑄) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eucrct2eupth1.v | . 2 ⊢ 𝑉 = (Vtx‘𝐺) | |
| 2 | eucrct2eupth1.i | . 2 ⊢ 𝐼 = (iEdg‘𝐺) | |
| 3 | eucrct2eupth1.d | . 2 ⊢ (𝜑 → 𝐹(EulerPaths‘𝐺)𝑃) | |
| 4 | eucrct2eupth1.n | . . 3 ⊢ (𝜑 → 𝑁 = ((♯‘𝐹) − 1)) | |
| 5 | eucrct2eupth1.g | . . . . 5 ⊢ (𝜑 → 0 < (♯‘𝐹)) | |
| 6 | eupthiswlk 30301 | . . . . . 6 ⊢ (𝐹(EulerPaths‘𝐺)𝑃 → 𝐹(Walks‘𝐺)𝑃) | |
| 7 | wlkcl 29703 | . . . . . 6 ⊢ (𝐹(Walks‘𝐺)𝑃 → (♯‘𝐹) ∈ ℕ0) | |
| 8 | nn0z 12540 | . . . . . . . . 9 ⊢ ((♯‘𝐹) ∈ ℕ0 → (♯‘𝐹) ∈ ℤ) | |
| 9 | 8 | anim1i 621 | . . . . . . . 8 ⊢ (((♯‘𝐹) ∈ ℕ0 ∧ 0 < (♯‘𝐹)) → ((♯‘𝐹) ∈ ℤ ∧ 0 < (♯‘𝐹))) |
| 10 | elnnz 12526 | . . . . . . . 8 ⊢ ((♯‘𝐹) ∈ ℕ ↔ ((♯‘𝐹) ∈ ℤ ∧ 0 < (♯‘𝐹))) | |
| 11 | 9, 10 | sylibr 235 | . . . . . . 7 ⊢ (((♯‘𝐹) ∈ ℕ0 ∧ 0 < (♯‘𝐹)) → (♯‘𝐹) ∈ ℕ) |
| 12 | 11 | ex 413 | . . . . . 6 ⊢ ((♯‘𝐹) ∈ ℕ0 → (0 < (♯‘𝐹) → (♯‘𝐹) ∈ ℕ)) |
| 13 | 3, 6, 7, 12 | 4syl 19 | . . . . 5 ⊢ (𝜑 → (0 < (♯‘𝐹) → (♯‘𝐹) ∈ ℕ)) |
| 14 | 5, 13 | mpd 15 | . . . 4 ⊢ (𝜑 → (♯‘𝐹) ∈ ℕ) |
| 15 | fzo0end 13705 | . . . 4 ⊢ ((♯‘𝐹) ∈ ℕ → ((♯‘𝐹) − 1) ∈ (0..^(♯‘𝐹))) | |
| 16 | 14, 15 | syl 17 | . . 3 ⊢ (𝜑 → ((♯‘𝐹) − 1) ∈ (0..^(♯‘𝐹))) |
| 17 | 4, 16 | eqeltrd 2839 | . 2 ⊢ (𝜑 → 𝑁 ∈ (0..^(♯‘𝐹))) |
| 18 | eucrct2eupth1.e | . 2 ⊢ (𝜑 → (iEdg‘𝑆) = (𝐼 ↾ (𝐹 “ (0..^𝑁)))) | |
| 19 | eucrct2eupth1.h | . 2 ⊢ 𝐻 = (𝐹 prefix 𝑁) | |
| 20 | eucrct2eupth1.q | . 2 ⊢ 𝑄 = (𝑃 ↾ (0...𝑁)) | |
| 21 | eucrct2eupth1.s | . 2 ⊢ (Vtx‘𝑆) = 𝑉 | |
| 22 | 1, 2, 3, 17, 18, 19, 20, 21 | eupthres 30304 | 1 ⊢ (𝜑 → 𝐻(EulerPaths‘𝑆)𝑄) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 396 = wceq 1547 ∈ wcel 2119 class class class wbr 5073 ↾ cres 5621 “ cima 5622 ‘cfv 6486 (class class class)co 7357 0cc0 11030 1c1 11031 < clt 11171 − cmin 11369 ℕcn 12166 ℕ0cn0 12429 ℤcz 12516 ...cfz 13453 ..^cfzo 13600 ♯chash 14284 prefix cpfx 14625 Vtxcvtx 29084 iEdgciedg 29085 Walkscwlks 29684 Circuitsccrcts 29871 EulerPathsceupth 30286 |
| 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 1974 ax-7 2015 ax-8 2121 ax-9 2129 ax-10 2152 ax-11 2168 ax-12 2189 ax-ext 2711 ax-rep 5200 ax-sep 5219 ax-nul 5229 ax-pow 5295 ax-pr 5363 ax-un 7679 ax-cnex 11086 ax-resscn 11087 ax-1cn 11088 ax-icn 11089 ax-addcl 11090 ax-addrcl 11091 ax-mulcl 11092 ax-mulrcl 11093 ax-mulcom 11094 ax-addass 11095 ax-mulass 11096 ax-distr 11097 ax-i2m1 11098 ax-1ne0 11099 ax-1rid 11100 ax-rnegex 11101 ax-rrecex 11102 ax-cnre 11103 ax-pre-lttri 11104 ax-pre-lttrn 11105 ax-pre-ltadd 11106 ax-pre-mulgt0 11107 |
| This theorem depends on definitions: df-bi 208 df-an 397 df-or 854 df-ifp 1069 df-3or 1093 df-3an 1094 df-tru 1550 df-fal 1560 df-ex 1787 df-nf 1791 df-sb 2074 df-mo 2543 df-eu 2573 df-clab 2718 df-cleq 2731 df-clel 2814 df-nfc 2888 df-ne 2935 df-nel 3039 df-ral 3054 df-rex 3064 df-reu 3345 df-rab 3392 df-v 3433 df-sbc 3724 df-csb 3832 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-pss 3903 df-nul 4263 df-if 4456 df-pw 4532 df-sn 4557 df-pr 4559 df-op 4563 df-uni 4840 df-int 4879 df-iun 4924 df-br 5074 df-opab 5136 df-mpt 5155 df-tr 5181 df-id 5514 df-eprel 5519 df-po 5527 df-so 5528 df-fr 5572 df-we 5574 df-xp 5625 df-rel 5626 df-cnv 5627 df-co 5628 df-dm 5629 df-rn 5630 df-res 5631 df-ima 5632 df-pred 6253 df-ord 6314 df-on 6315 df-lim 6316 df-suc 6317 df-iota 6442 df-fun 6488 df-fn 6489 df-f 6490 df-f1 6491 df-fo 6492 df-f1o 6493 df-fv 6494 df-riota 7314 df-ov 7360 df-oprab 7361 df-mpo 7362 df-om 7808 df-1st 7932 df-2nd 7933 df-frecs 8222 df-wrecs 8253 df-recs 8302 df-rdg 8340 df-1o 8396 df-er 8634 df-map 8766 df-pm 8767 df-en 8885 df-dom 8886 df-sdom 8887 df-fin 8888 df-card 9855 df-pnf 11173 df-mnf 11174 df-xr 11175 df-ltxr 11176 df-le 11177 df-sub 11371 df-neg 11372 df-nn 12167 df-n0 12430 df-z 12517 df-uz 12781 df-fz 13454 df-fzo 13601 df-hash 14285 df-word 14468 df-substr 14596 df-pfx 14626 df-wlks 29687 df-trls 29778 df-eupth 30287 |
| This theorem is referenced by: eucrct2eupth 30334 |
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