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| Mirrors > Home > MPE Home > Th. List > Mathboxes > acycgrislfgr | Structured version Visualization version GIF version | ||
| Description: An acyclic hypergraph is a loop-free hypergraph. (Contributed by BTernaryTau, 15-Oct-2023.) |
| Ref | Expression |
|---|---|
| acycgrislfgr.1 | ⊢ 𝑉 = (Vtx‘𝐺) |
| acycgrislfgr.2 | ⊢ 𝐼 = (iEdg‘𝐺) |
| Ref | Expression |
|---|---|
| acycgrislfgr | ⊢ ((𝐺 ∈ AcyclicGraph ∧ 𝐺 ∈ UHGraph) → 𝐼:dom 𝐼⟶{𝑥 ∈ 𝒫 𝑉 ∣ 2 ≤ (♯‘𝑥)}) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | isacycgr 35288 | . . . 4 ⊢ (𝐺 ∈ UHGraph → (𝐺 ∈ AcyclicGraph ↔ ¬ ∃𝑓∃𝑝(𝑓(Cycles‘𝐺)𝑝 ∧ 𝑓 ≠ ∅))) | |
| 2 | 1 | biimpac 478 | . . 3 ⊢ ((𝐺 ∈ AcyclicGraph ∧ 𝐺 ∈ UHGraph) → ¬ ∃𝑓∃𝑝(𝑓(Cycles‘𝐺)𝑝 ∧ 𝑓 ≠ ∅)) |
| 3 | loop1cycl 35280 | . . . . . . . 8 ⊢ (𝐺 ∈ UHGraph → (∃𝑓∃𝑝(𝑓(Cycles‘𝐺)𝑝 ∧ (♯‘𝑓) = 1 ∧ (𝑝‘0) = 𝑎) ↔ {𝑎} ∈ (Edg‘𝐺))) | |
| 4 | 3simpa 1148 | . . . . . . . . 9 ⊢ ((𝑓(Cycles‘𝐺)𝑝 ∧ (♯‘𝑓) = 1 ∧ (𝑝‘0) = 𝑎) → (𝑓(Cycles‘𝐺)𝑝 ∧ (♯‘𝑓) = 1)) | |
| 5 | 4 | 2eximi 1837 | . . . . . . . 8 ⊢ (∃𝑓∃𝑝(𝑓(Cycles‘𝐺)𝑝 ∧ (♯‘𝑓) = 1 ∧ (𝑝‘0) = 𝑎) → ∃𝑓∃𝑝(𝑓(Cycles‘𝐺)𝑝 ∧ (♯‘𝑓) = 1)) |
| 6 | 3, 5 | biimtrrdi 254 | . . . . . . 7 ⊢ (𝐺 ∈ UHGraph → ({𝑎} ∈ (Edg‘𝐺) → ∃𝑓∃𝑝(𝑓(Cycles‘𝐺)𝑝 ∧ (♯‘𝑓) = 1))) |
| 7 | 6 | exlimdv 1934 | . . . . . 6 ⊢ (𝐺 ∈ UHGraph → (∃𝑎{𝑎} ∈ (Edg‘𝐺) → ∃𝑓∃𝑝(𝑓(Cycles‘𝐺)𝑝 ∧ (♯‘𝑓) = 1))) |
| 8 | vex 3442 | . . . . . . . . 9 ⊢ 𝑓 ∈ V | |
| 9 | hash1n0 14342 | . . . . . . . . 9 ⊢ ((𝑓 ∈ V ∧ (♯‘𝑓) = 1) → 𝑓 ≠ ∅) | |
| 10 | 8, 9 | mpan 690 | . . . . . . . 8 ⊢ ((♯‘𝑓) = 1 → 𝑓 ≠ ∅) |
| 11 | 10 | anim2i 617 | . . . . . . 7 ⊢ ((𝑓(Cycles‘𝐺)𝑝 ∧ (♯‘𝑓) = 1) → (𝑓(Cycles‘𝐺)𝑝 ∧ 𝑓 ≠ ∅)) |
| 12 | 11 | 2eximi 1837 | . . . . . 6 ⊢ (∃𝑓∃𝑝(𝑓(Cycles‘𝐺)𝑝 ∧ (♯‘𝑓) = 1) → ∃𝑓∃𝑝(𝑓(Cycles‘𝐺)𝑝 ∧ 𝑓 ≠ ∅)) |
| 13 | 7, 12 | syl6 35 | . . . . 5 ⊢ (𝐺 ∈ UHGraph → (∃𝑎{𝑎} ∈ (Edg‘𝐺) → ∃𝑓∃𝑝(𝑓(Cycles‘𝐺)𝑝 ∧ 𝑓 ≠ ∅))) |
| 14 | 13 | con3d 152 | . . . 4 ⊢ (𝐺 ∈ UHGraph → (¬ ∃𝑓∃𝑝(𝑓(Cycles‘𝐺)𝑝 ∧ 𝑓 ≠ ∅) → ¬ ∃𝑎{𝑎} ∈ (Edg‘𝐺))) |
| 15 | 14 | adantl 481 | . . 3 ⊢ ((𝐺 ∈ AcyclicGraph ∧ 𝐺 ∈ UHGraph) → (¬ ∃𝑓∃𝑝(𝑓(Cycles‘𝐺)𝑝 ∧ 𝑓 ≠ ∅) → ¬ ∃𝑎{𝑎} ∈ (Edg‘𝐺))) |
| 16 | 2, 15 | mpd 15 | . 2 ⊢ ((𝐺 ∈ AcyclicGraph ∧ 𝐺 ∈ UHGraph) → ¬ ∃𝑎{𝑎} ∈ (Edg‘𝐺)) |
| 17 | acycgrislfgr.1 | . . . 4 ⊢ 𝑉 = (Vtx‘𝐺) | |
| 18 | acycgrislfgr.2 | . . . 4 ⊢ 𝐼 = (iEdg‘𝐺) | |
| 19 | 17, 18 | lfuhgr3 35263 | . . 3 ⊢ (𝐺 ∈ UHGraph → (𝐼:dom 𝐼⟶{𝑥 ∈ 𝒫 𝑉 ∣ 2 ≤ (♯‘𝑥)} ↔ ¬ ∃𝑎{𝑎} ∈ (Edg‘𝐺))) |
| 20 | 19 | adantl 481 | . 2 ⊢ ((𝐺 ∈ AcyclicGraph ∧ 𝐺 ∈ UHGraph) → (𝐼:dom 𝐼⟶{𝑥 ∈ 𝒫 𝑉 ∣ 2 ≤ (♯‘𝑥)} ↔ ¬ ∃𝑎{𝑎} ∈ (Edg‘𝐺))) |
| 21 | 16, 20 | mpbird 257 | 1 ⊢ ((𝐺 ∈ AcyclicGraph ∧ 𝐺 ∈ UHGraph) → 𝐼:dom 𝐼⟶{𝑥 ∈ 𝒫 𝑉 ∣ 2 ≤ (♯‘𝑥)}) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ↔ wb 206 ∧ wa 395 ∧ w3a 1086 = wceq 1541 ∃wex 1780 ∈ wcel 2113 ≠ wne 2930 {crab 3397 Vcvv 3438 ∅c0 4283 𝒫 cpw 4552 {csn 4578 class class class wbr 5096 dom cdm 5622 ⟶wf 6486 ‘cfv 6490 0cc0 11024 1c1 11025 ≤ cle 11165 2c2 12198 ♯chash 14251 Vtxcvtx 29018 iEdgciedg 29019 Edgcedg 29069 UHGraphcuhgr 29078 Cyclesccycls 29807 AcyclicGraphcacycgr 35285 |
| 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 2182 ax-ext 2706 ax-rep 5222 ax-sep 5239 ax-nul 5249 ax-pow 5308 ax-pr 5375 ax-un 7678 ax-cnex 11080 ax-resscn 11081 ax-1cn 11082 ax-icn 11083 ax-addcl 11084 ax-addrcl 11085 ax-mulcl 11086 ax-mulrcl 11087 ax-mulcom 11088 ax-addass 11089 ax-mulass 11090 ax-distr 11091 ax-i2m1 11092 ax-1ne0 11093 ax-1rid 11094 ax-rnegex 11095 ax-rrecex 11096 ax-cnre 11097 ax-pre-lttri 11098 ax-pre-lttrn 11099 ax-pre-ltadd 11100 ax-pre-mulgt0 11101 |
| 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 2537 df-eu 2567 df-clab 2713 df-cleq 2726 df-clel 2809 df-nfc 2883 df-ne 2931 df-nel 3035 df-ral 3050 df-rex 3059 df-reu 3349 df-rab 3398 df-v 3440 df-sbc 3739 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4284 df-if 4478 df-pw 4554 df-sn 4579 df-pr 4581 df-op 4585 df-uni 4862 df-int 4901 df-iun 4946 df-br 5097 df-opab 5159 df-mpt 5178 df-tr 5204 df-id 5517 df-eprel 5522 df-po 5530 df-so 5531 df-fr 5575 df-we 5577 df-xp 5628 df-rel 5629 df-cnv 5630 df-co 5631 df-dm 5632 df-rn 5633 df-res 5634 df-ima 5635 df-pred 6257 df-ord 6318 df-on 6319 df-lim 6320 df-suc 6321 df-iota 6446 df-fun 6492 df-fn 6493 df-f 6494 df-f1 6495 df-fo 6496 df-f1o 6497 df-fv 6498 df-riota 7313 df-ov 7359 df-oprab 7360 df-mpo 7361 df-om 7807 df-1st 7931 df-2nd 7932 df-frecs 8221 df-wrecs 8252 df-recs 8301 df-rdg 8339 df-1o 8395 df-oadd 8399 df-er 8633 df-map 8763 df-pm 8764 df-en 8882 df-dom 8883 df-sdom 8884 df-fin 8885 df-dju 9811 df-card 9849 df-pnf 11166 df-mnf 11167 df-xr 11168 df-ltxr 11169 df-le 11170 df-sub 11364 df-neg 11365 df-nn 12144 df-2 12206 df-n0 12400 df-xnn0 12473 df-z 12487 df-uz 12750 df-fz 13422 df-fzo 13569 df-hash 14252 df-word 14435 df-concat 14492 df-s1 14518 df-s2 14769 df-edg 29070 df-uhgr 29080 df-wlks 29622 df-wlkson 29623 df-trls 29713 df-trlson 29714 df-pths 29736 df-pthson 29738 df-cycls 29809 df-acycgr 35286 |
| This theorem is referenced by: upgracycumgr 35296 |
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