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| Mirrors > Home > MPE Home > Th. List > Mathboxes > prclisacycgr | Structured version Visualization version GIF version | ||
| Description: A proper class (representing a null graph, see vtxvalprc 29630) has the property of an acyclic graph (see also acycgr0v 35991). (Contributed by BTernaryTau, 11-Oct-2023.) (New usage is discouraged.) |
| Ref | Expression |
|---|---|
| prclisacycgr.1 | ⊢ 𝑉 = (Vtx‘𝐺) |
| Ref | Expression |
|---|---|
| prclisacycgr | ⊢ (¬ 𝐺 ∈ V → ¬ ∃𝑓∃𝑝(𝑓(Cycles‘𝐺)𝑝 ∧ 𝑓 ≠ ∅)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | prclisacycgr.1 | . . 3 ⊢ 𝑉 = (Vtx‘𝐺) | |
| 2 | fvprc 6880 | . . 3 ⊢ (¬ 𝐺 ∈ V → (Vtx‘𝐺) = ∅) | |
| 3 | 1, 2 | eqtrid 2807 | . 2 ⊢ (¬ 𝐺 ∈ V → 𝑉 = ∅) |
| 4 | br0 5153 | . . . . . 6 ⊢ ¬ 𝑓∅𝑝 | |
| 5 | df-cycls 30381 | . . . . . . . . . 10 ⊢ Cycles = (𝑔 ∈ V ↦ {〈𝑓, 𝑝〉 ∣ (𝑓(Paths‘𝑔)𝑝 ∧ (𝑝‘0) = (𝑝‘(♯‘𝑓)))}) | |
| 6 | 5 | relmptopab 7673 | . . . . . . . . 9 ⊢ Rel (Cycles‘𝐺) |
| 7 | cycliswlk 30393 | . . . . . . . . . 10 ⊢ (𝑓(Cycles‘𝐺)𝑝 → 𝑓(Walks‘𝐺)𝑝) | |
| 8 | df-br 5103 | . . . . . . . . . 10 ⊢ (𝑓(Cycles‘𝐺)𝑝 ↔ 〈𝑓, 𝑝〉 ∈ (Cycles‘𝐺)) | |
| 9 | df-br 5103 | . . . . . . . . . 10 ⊢ (𝑓(Walks‘𝐺)𝑝 ↔ 〈𝑓, 𝑝〉 ∈ (Walks‘𝐺)) | |
| 10 | 7, 8, 9 | 3imtr3i 294 | . . . . . . . . 9 ⊢ (〈𝑓, 𝑝〉 ∈ (Cycles‘𝐺) → 〈𝑓, 𝑝〉 ∈ (Walks‘𝐺)) |
| 11 | 6, 10 | relssi 5763 | . . . . . . . 8 ⊢ (Cycles‘𝐺) ⊆ (Walks‘𝐺) |
| 12 | 1 | eqeq1i 2765 | . . . . . . . . 9 ⊢ (𝑉 = ∅ ↔ (Vtx‘𝐺) = ∅) |
| 13 | g0wlk0 30238 | . . . . . . . . 9 ⊢ ((Vtx‘𝐺) = ∅ → (Walks‘𝐺) = ∅) | |
| 14 | 12, 13 | sylbi 220 | . . . . . . . 8 ⊢ (𝑉 = ∅ → (Walks‘𝐺) = ∅) |
| 15 | 11, 14 | sseqtrid 3951 | . . . . . . 7 ⊢ (𝑉 = ∅ → (Cycles‘𝐺) ⊆ ∅) |
| 16 | ss0 4351 | . . . . . . 7 ⊢ ((Cycles‘𝐺) ⊆ ∅ → (Cycles‘𝐺) = ∅) | |
| 17 | breq 5104 | . . . . . . . 8 ⊢ ((Cycles‘𝐺) = ∅ → (𝑓(Cycles‘𝐺)𝑝 ↔ 𝑓∅𝑝)) | |
| 18 | 17 | notbid 321 | . . . . . . 7 ⊢ ((Cycles‘𝐺) = ∅ → (¬ 𝑓(Cycles‘𝐺)𝑝 ↔ ¬ 𝑓∅𝑝)) |
| 19 | 15, 16, 18 | 3syl 19 | . . . . . 6 ⊢ (𝑉 = ∅ → (¬ 𝑓(Cycles‘𝐺)𝑝 ↔ ¬ 𝑓∅𝑝)) |
| 20 | 4, 19 | mpbiri 261 | . . . . 5 ⊢ (𝑉 = ∅ → ¬ 𝑓(Cycles‘𝐺)𝑝) |
| 21 | 20 | intnanrd 495 | . . . 4 ⊢ (𝑉 = ∅ → ¬ (𝑓(Cycles‘𝐺)𝑝 ∧ 𝑓 ≠ ∅)) |
| 22 | 21 | nexdv 1968 | . . 3 ⊢ (𝑉 = ∅ → ¬ ∃𝑝(𝑓(Cycles‘𝐺)𝑝 ∧ 𝑓 ≠ ∅)) |
| 23 | 22 | nexdv 1968 | . 2 ⊢ (𝑉 = ∅ → ¬ ∃𝑓∃𝑝(𝑓(Cycles‘𝐺)𝑝 ∧ 𝑓 ≠ ∅)) |
| 24 | 3, 23 | syl 18 | 1 ⊢ (¬ 𝐺 ∈ V → ¬ ∃𝑓∃𝑝(𝑓(Cycles‘𝐺)𝑝 ∧ 𝑓 ≠ ∅)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ¬ wn 3 → wi 4 ↔ wb 209 ∧ wa 401 = wceq 1569 ∃wex 1811 ∈ wcel 2144 ≠ wne 2955 Vcvv 3450 ⊆ wss 3896 ∅c0 4277 〈cop 4834 class class class wbr 5102 ‘cfv 6541 0cc0 11205 ♯chash 14479 Vtxcvtx 29581 Walkscwlks 30184 Pathscpths 30302 Cyclesccycls 30379 |
| 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 7753 ax-cnex 11261 ax-resscn 11262 ax-1cn 11263 ax-icn 11264 ax-addcl 11265 ax-addrcl 11266 ax-mulcl 11267 ax-mulrcl 11268 ax-mulcom 11269 ax-addass 11270 ax-mulass 11271 ax-distr 11272 ax-i2m1 11273 ax-1ne0 11274 ax-1rid 11275 ax-rnegex 11276 ax-rrecex 11277 ax-cnre 11278 ax-pre-lttri 11279 ax-pre-lttrn 11280 ax-pre-ltadd 11281 ax-pre-mulgt0 11282 |
| 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 3848 df-ss 3897 df-pss 4013 df-dif 4046 df-in 4090 df-un 4150 df-nul 4278 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 6306 df-ord 6367 df-on 6368 df-lim 6369 df-suc 6370 df-iota 6496 df-fun 6543 df-fn 6544 df-f 6545 df-f1 6546 df-fo 6547 df-f1o 6548 df-fv 6549 df-riota 7379 df-ov 7425 df-oprab 7426 df-mpo 7427 df-om 7880 df-1st 8003 df-2nd 8004 df-frecs 8304 df-wrecs 8335 df-recs 8384 df-rdg 8423 df-1o 8481 df-er 8722 df-map 8854 df-en 8979 df-dom 8980 df-sdom 8981 df-fin 8982 df-card 10025 df-pnf 11350 df-mnf 11351 df-xr 11352 df-ltxr 11353 df-le 11354 df-sub 11548 df-neg 11549 df-nn 12341 df-n0 12612 df-z 12699 df-uz 12971 df-fz 13645 df-fzo 13794 df-hash 14480 df-word 14664 df-wlks 30187 df-trls 30282 df-pths 30306 df-cycls 30381 |
| This theorem is used by: (None) |
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