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| Mirrors > Home > MPE Home > Th. List > wlkreslem | Structured version Visualization version GIF version | ||
| Description: Lemma for wlkres 29927. (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 3065 | . . 3 ⊢ (𝑆 ∉ V ↔ ¬ 𝑆 ∈ V) | |
| 3 | wlkres.d | . . . . 5 ⊢ (𝜑 → 𝐹(Walks‘𝐺)𝑃) | |
| 4 | df-br 5106 | . . . . . 6 ⊢ (𝐹(Walks‘𝐺)𝑃 ↔ 〈𝐹, 𝑃〉 ∈ (Walks‘𝐺)) | |
| 5 | ne0i 4296 | . . . . . . 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 2816 | . . . . . . . . . . 11 ⊢ (𝜑 → (Vtx‘𝑆) = (Vtx‘𝐺)) |
| 9 | 8 | anim1ci 627 | . . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑆 ∉ V) → (𝑆 ∉ V ∧ (Vtx‘𝑆) = (Vtx‘𝐺))) |
| 10 | wlk0prc 29911 | . . . . . . . . . 10 ⊢ ((𝑆 ∉ V ∧ (Vtx‘𝑆) = (Vtx‘𝐺)) → (Walks‘𝐺) = ∅) | |
| 11 | eqneqall 2971 | . . . . . . . . . 10 ⊢ ((Walks‘𝐺) = ∅ → ((Walks‘𝐺) ≠ ∅ → 𝑆 ∈ V)) | |
| 12 | 9, 10, 11 | 3syl 19 | . . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑆 ∉ V) → ((Walks‘𝐺) ≠ ∅ → 𝑆 ∈ V)) |
| 13 | 12 | expcom 418 | . . . . . . . 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 |
| Syntax hints: ¬ wn 3 → wi 4 ∧ wa 400 = wceq 1563 ∈ wcel 2145 ≠ wne 2960 ∉ wnel 3064 Vcvv 3457 ∅c0 4288 〈cop 4591 class class class wbr 5105 ‘cfv 6525 (class class class)co 7400 0cc0 11088 ..^cfzo 13673 ♯chash 14357 Vtxcvtx 29255 iEdgciedg 29256 Walkscwlks 29855 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1818 ax-4 1832 ax-5 1933 ax-6 1990 ax-7 2031 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2215 ax-ext 2737 ax-rep 5232 ax-sep 5251 ax-nul 5261 ax-pow 5327 ax-pr 5395 ax-un 7722 ax-cnex 11144 ax-resscn 11145 ax-1cn 11146 ax-icn 11147 ax-addcl 11148 ax-addrcl 11149 ax-mulcl 11150 ax-mulrcl 11151 ax-mulcom 11152 ax-addass 11153 ax-mulass 11154 ax-distr 11155 ax-i2m1 11156 ax-1ne0 11157 ax-1rid 11158 ax-rnegex 11159 ax-rrecex 11160 ax-cnre 11161 ax-pre-lttri 11162 ax-pre-lttrn 11163 ax-pre-ltadd 11164 ax-pre-mulgt0 11165 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-ifp 1077 df-3or 1102 df-3an 1103 df-tru 1566 df-fal 1576 df-ex 1803 df-nf 1807 df-sb 2094 df-mo 2569 df-eu 2599 df-clab 2744 df-cleq 2757 df-clel 2840 df-nfc 2914 df-ne 2961 df-nel 3065 df-ral 3080 df-rex 3090 df-reu 3371 df-rab 3418 df-v 3459 df-sbc 3748 df-csb 3856 df-dif 3910 df-un 3912 df-in 3914 df-ss 3924 df-pss 3927 df-nul 4289 df-if 4484 df-pw 4560 df-sn 4586 df-pr 4588 df-op 4592 df-uni 4869 df-int 4909 df-iun 4954 df-br 5106 df-opab 5168 df-mpt 5187 df-tr 5213 df-id 5547 df-eprel 5552 df-po 5560 df-so 5561 df-fr 5605 df-we 5607 df-xp 5658 df-rel 5659 df-cnv 5660 df-co 5661 df-dm 5662 df-rn 5663 df-res 5664 df-ima 5665 df-pred 6292 df-ord 6353 df-on 6354 df-lim 6355 df-suc 6356 df-iota 6481 df-fun 6527 df-fn 6528 df-f 6529 df-f1 6530 df-fo 6531 df-f1o 6532 df-fv 6533 df-riota 7357 df-ov 7403 df-oprab 7404 df-mpo 7405 df-om 7851 df-1st 7974 df-2nd 7975 df-frecs 8266 df-wrecs 8297 df-recs 8346 df-rdg 8385 df-1o 8441 df-er 8682 df-map 8814 df-en 8932 df-dom 8933 df-sdom 8934 df-fin 8935 df-card 9913 df-pnf 11233 df-mnf 11234 df-xr 11235 df-ltxr 11236 df-le 11237 df-sub 11431 df-neg 11432 df-nn 12225 df-n0 12496 df-z 12583 df-uz 12854 df-fz 13527 df-fzo 13674 df-hash 14358 df-word 14541 df-wlks 29858 |
| This theorem is referenced by: wlkres 29927 |
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