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| Mirrors > Home > MPE Home > Th. List > wlkreslem | Structured version Visualization version GIF version | ||
| Description: Lemma for wlkres 30254. (Contributed by AV, 5-Mar-2021.) (Revised by AV, 30-Nov-2022.) |
| Ref | Expression |
|---|---|
| wlkres.v | ⊢ 𝑉 = (Vtx‘𝐺) |
| wlkres.i | ⊢ 𝐼 = (iEdg‘𝐺) |
| wlkres.d | ⊢ (𝜑 → 𝐹(Walks‘𝐺)𝑃) |
| wlkres.n | ⊢ (𝜑 → 𝑁 ∈ (0..^(♯‘𝐹))) |
| wlkres.s | ⊢ (𝜑 → (Vtx‘𝑆) = 𝑉) |
| Ref | Expression |
|---|---|
| wlkreslem | ⊢ (𝜑 → 𝑆 ∈ V) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ax-1 6 | . 2 ⊢ (𝑆 ∈ V → (𝜑 → 𝑆 ∈ V)) | |
| 2 | df-nel 3062 | . . 3 ⊢ (𝑆 ∉ V ↔ ¬ 𝑆 ∈ V) | |
| 3 | wlkres.d | . . . . 5 ⊢ (𝜑 → 𝐹(Walks‘𝐺)𝑃) | |
| 4 | df-br 5103 | . . . . . 6 ⊢ (𝐹(Walks‘𝐺)𝑃 ↔ 〈𝐹, 𝑃〉 ∈ (Walks‘𝐺)) | |
| 5 | ne0i 4286 | . . . . . . 7 ⊢ (〈𝐹, 𝑃〉 ∈ (Walks‘𝐺) → (Walks‘𝐺) ≠ ∅) | |
| 6 | wlkres.s | . . . . . . . . . . . 12 ⊢ (𝜑 → (Vtx‘𝑆) = 𝑉) | |
| 7 | wlkres.v | . . . . . . . . . . . 12 ⊢ 𝑉 = (Vtx‘𝐺) | |
| 8 | 6, 7 | eqtrdi 2811 | . . . . . . . . . . 11 ⊢ (𝜑 → (Vtx‘𝑆) = (Vtx‘𝐺)) |
| 9 | 8 | anim1ci 628 | . . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑆 ∉ V) → (𝑆 ∉ V ∧ (Vtx‘𝑆) = (Vtx‘𝐺))) |
| 10 | wlk0prc 30238 | . . . . . . . . . 10 ⊢ ((𝑆 ∉ V ∧ (Vtx‘𝑆) = (Vtx‘𝐺)) → (Walks‘𝐺) = ∅) | |
| 11 | eqneqall 2966 | . . . . . . . . . 10 ⊢ ((Walks‘𝐺) = ∅ → ((Walks‘𝐺) ≠ ∅ → 𝑆 ∈ V)) | |
| 12 | 9, 10, 11 | 3syl 19 | . . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑆 ∉ V) → ((Walks‘𝐺) ≠ ∅ → 𝑆 ∈ V)) |
| 13 | 12 | expcom 419 | . . . . . . . 8 ⊢ (𝑆 ∉ V → (𝜑 → ((Walks‘𝐺) ≠ ∅ → 𝑆 ∈ V))) |
| 14 | 13 | com13 89 | . . . . . . 7 ⊢ ((Walks‘𝐺) ≠ ∅ → (𝜑 → (𝑆 ∉ V → 𝑆 ∈ V))) |
| 15 | 5, 14 | syl 18 | . . . . . 6 ⊢ (〈𝐹, 𝑃〉 ∈ (Walks‘𝐺) → (𝜑 → (𝑆 ∉ V → 𝑆 ∈ V))) |
| 16 | 4, 15 | sylbi 220 | . . . . 5 ⊢ (𝐹(Walks‘𝐺)𝑃 → (𝜑 → (𝑆 ∉ V → 𝑆 ∈ V))) |
| 17 | 3, 16 | mpcom 39 | . . . 4 ⊢ (𝜑 → (𝑆 ∉ V → 𝑆 ∈ V)) |
| 18 | 17 | com12 33 | . . 3 ⊢ (𝑆 ∉ V → (𝜑 → 𝑆 ∈ V)) |
| 19 | 2, 18 | sylbir 238 | . 2 ⊢ (¬ 𝑆 ∈ V → (𝜑 → 𝑆 ∈ V)) |
| 20 | 1, 19 | pm2.61i 184 | 1 ⊢ (𝜑 → 𝑆 ∈ V) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ¬ wn 3 → wi 4 ∧ wa 401 = wceq 1569 ∈ wcel 2144 ≠ wne 2955 ∉ wnel 3061 Vcvv 3450 ∅c0 4278 〈cop 4834 class class class wbr 5102 ‘cfv 6538 (class class class)co 7420 0cc0 11203 ..^cfzo 13791 ♯chash 14477 Vtxcvtx 29579 iEdgciedg 29580 Walkscwlks 30182 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2212 ax-ext 2732 ax-rep 5231 ax-sep 5248 ax-nul 5259 ax-pow 5326 ax-pr 5390 ax-un 7751 ax-cnex 11259 ax-resscn 11260 ax-1cn 11261 ax-icn 11262 ax-addcl 11263 ax-addrcl 11264 ax-mulcl 11265 ax-mulrcl 11266 ax-mulcom 11267 ax-addass 11268 ax-mulass 11269 ax-distr 11270 ax-i2m1 11271 ax-1ne0 11272 ax-1rid 11273 ax-rnegex 11274 ax-rrecex 11275 ax-cnre 11276 ax-pre-lttri 11277 ax-pre-lttrn 11278 ax-pre-ltadd 11279 ax-pre-mulgt0 11280 |
| 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 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2099 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 3739 df-csb 3847 df-ss 3896 df-pss 4014 df-dif 4047 df-in 4091 df-un 4151 df-nul 4279 df-if 4482 df-pw 4558 df-sn 4585 df-pr 4587 df-op 4835 df-uni 4867 df-int 4907 df-iun 4952 df-br 5103 df-opab 5167 df-mpt 5186 df-tr 5212 df-id 5545 df-eprel 5550 df-po 5558 df-so 5559 df-fr 5603 df-we 5605 df-xp 5656 df-rel 5657 df-cnv 5658 df-co 5659 df-dm 5660 df-rn 5661 df-res 5662 df-ima 5663 df-pred 6304 df-ord 6365 df-on 6366 df-lim 6367 df-suc 6368 df-iota 6494 df-fun 6540 df-fn 6541 df-f 6542 df-f1 6543 df-fo 6544 df-f1o 6545 df-fv 6546 df-riota 7377 df-ov 7423 df-oprab 7424 df-mpo 7425 df-om 7878 df-1st 8001 df-2nd 8002 df-frecs 8302 df-wrecs 8333 df-recs 8382 df-rdg 8421 df-1o 8479 df-er 8720 df-map 8852 df-en 8977 df-dom 8978 df-sdom 8979 df-fin 8980 df-card 10023 df-pnf 11348 df-mnf 11349 df-xr 11350 df-ltxr 11351 df-le 11352 df-sub 11546 df-neg 11547 df-nn 12339 df-n0 12610 df-z 12697 df-uz 12969 df-fz 13643 df-fzo 13792 df-hash 14478 df-word 14662 df-wlks 30185 |
| This theorem is used by: wlkres 30254 |
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