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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 30751 | . . . 4 ⊢ (𝐺 ∈ UHGraph → (𝐺 ∈ AcyclicGraph ↔ ¬ ∃𝑓∃𝑝(𝑓(Cycles‘𝐺)𝑝 ∧ 𝑓 ≠ ∅))) | |
| 2 | 1 | biimpac 484 | . . 3 ⊢ ((𝐺 ∈ AcyclicGraph ∧ 𝐺 ∈ UHGraph) → ¬ ∃𝑓∃𝑝(𝑓(Cycles‘𝐺)𝑝 ∧ 𝑓 ≠ ∅)) |
| 3 | loop1cycl 30744 | . . . . . . . 8 ⊢ (𝐺 ∈ UHGraph → (∃𝑓∃𝑝(𝑓(Cycles‘𝐺)𝑝 ∧ (♯‘𝑓) = 1 ∧ (𝑝‘0) = 𝑎) ↔ {𝑎} ∈ (Edg‘𝐺))) | |
| 4 | 3simpa 1166 | . . . . . . . . 9 ⊢ ((𝑓(Cycles‘𝐺)𝑝 ∧ (♯‘𝑓) = 1 ∧ (𝑝‘0) = 𝑎) → (𝑓(Cycles‘𝐺)𝑝 ∧ (♯‘𝑓) = 1)) | |
| 5 | 4 | 2eximi 1868 | . . . . . . . 8 ⊢ (∃𝑓∃𝑝(𝑓(Cycles‘𝐺)𝑝 ∧ (♯‘𝑓) = 1 ∧ (𝑝‘0) = 𝑎) → ∃𝑓∃𝑝(𝑓(Cycles‘𝐺)𝑝 ∧ (♯‘𝑓) = 1)) |
| 6 | 3, 5 | biimtrrdi 257 | . . . . . . 7 ⊢ (𝐺 ∈ UHGraph → ({𝑎} ∈ (Edg‘𝐺) → ∃𝑓∃𝑝(𝑓(Cycles‘𝐺)𝑝 ∧ (♯‘𝑓) = 1))) |
| 7 | 6 | exlimdv 1965 | . . . . . 6 ⊢ (𝐺 ∈ UHGraph → (∃𝑎{𝑎} ∈ (Edg‘𝐺) → ∃𝑓∃𝑝(𝑓(Cycles‘𝐺)𝑝 ∧ (♯‘𝑓) = 1))) |
| 8 | vex 3454 | . . . . . . . . 9 ⊢ 𝑓 ∈ V | |
| 9 | hash1n0 14566 | . . . . . . . . 9 ⊢ ((𝑓 ∈ V ∧ (♯‘𝑓) = 1) → 𝑓 ≠ ∅) | |
| 10 | 8, 9 | mpan 703 | . . . . . . . 8 ⊢ ((♯‘𝑓) = 1 → 𝑓 ≠ ∅) |
| 11 | 10 | anim2i 629 | . . . . . . 7 ⊢ ((𝑓(Cycles‘𝐺)𝑝 ∧ (♯‘𝑓) = 1) → (𝑓(Cycles‘𝐺)𝑝 ∧ 𝑓 ≠ ∅)) |
| 12 | 11 | 2eximi 1868 | . . . . . 6 ⊢ (∃𝑓∃𝑝(𝑓(Cycles‘𝐺)𝑝 ∧ (♯‘𝑓) = 1) → ∃𝑓∃𝑝(𝑓(Cycles‘𝐺)𝑝 ∧ 𝑓 ≠ ∅)) |
| 13 | 7, 12 | syl6 36 | . . . . 5 ⊢ (𝐺 ∈ UHGraph → (∃𝑎{𝑎} ∈ (Edg‘𝐺) → ∃𝑓∃𝑝(𝑓(Cycles‘𝐺)𝑝 ∧ 𝑓 ≠ ∅))) |
| 14 | 13 | con3d 153 | . . . 4 ⊢ (𝐺 ∈ UHGraph → (¬ ∃𝑓∃𝑝(𝑓(Cycles‘𝐺)𝑝 ∧ 𝑓 ≠ ∅) → ¬ ∃𝑎{𝑎} ∈ (Edg‘𝐺))) |
| 15 | 14 | adantl 487 | . . 3 ⊢ ((𝐺 ∈ AcyclicGraph ∧ 𝐺 ∈ UHGraph) → (¬ ∃𝑓∃𝑝(𝑓(Cycles‘𝐺)𝑝 ∧ 𝑓 ≠ ∅) → ¬ ∃𝑎{𝑎} ∈ (Edg‘𝐺))) |
| 16 | 2, 15 | mpd 16 | . 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 29728 | . . 3 ⊢ (𝐺 ∈ UHGraph → (𝐼:dom 𝐼⟶{𝑥 ∈ 𝒫 𝑉 ∣ 2 ≤ (♯‘𝑥)} ↔ ¬ ∃𝑎{𝑎} ∈ (Edg‘𝐺))) |
| 20 | 19 | adantl 487 | . 2 ⊢ ((𝐺 ∈ AcyclicGraph ∧ 𝐺 ∈ UHGraph) → (𝐼:dom 𝐼⟶{𝑥 ∈ 𝒫 𝑉 ∣ 2 ≤ (♯‘𝑥)} ↔ ¬ ∃𝑎{𝑎} ∈ (Edg‘𝐺))) |
| 21 | 16, 20 | mpbird 260 | 1 ⊢ ((𝐺 ∈ AcyclicGraph ∧ 𝐺 ∈ UHGraph) → 𝐼:dom 𝐼⟶{𝑥 ∈ 𝒫 𝑉 ∣ 2 ≤ (♯‘𝑥)}) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ¬ wn 3 → wi 4 ↔ wb 209 ∧ wa 401 ∧ w3a 1103 = wceq 1569 ∃wex 1811 ∈ wcel 2144 ≠ wne 2955 {crab 3412 Vcvv 3450 ∅c0 4278 𝒫 cpw 4556 {csn 4583 class class class wbr 5102 dom cdm 5650 ⟶wf 6534 ‘cfv 6538 0cc0 11200 1c1 11201 ≤ cle 11344 2c2 12397 ♯chash 14474 Vtxcvtx 29574 iEdgciedg 29575 Edgcedg 29625 UHGraphcuhgr 29634 Cyclesccycls 30372 AcyclicGraphcacycgr 30748 |
| 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 11256 ax-resscn 11257 ax-1cn 11258 ax-icn 11259 ax-addcl 11260 ax-addrcl 11261 ax-mulcl 11262 ax-mulrcl 11263 ax-mulcom 11264 ax-addass 11265 ax-mulass 11266 ax-distr 11267 ax-i2m1 11268 ax-1ne0 11269 ax-1rid 11270 ax-rnegex 11271 ax-rrecex 11272 ax-cnre 11273 ax-pre-lttri 11274 ax-pre-lttrn 11275 ax-pre-ltadd 11276 ax-pre-mulgt0 11277 |
| 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 4584 df-pr 4586 df-op 4590 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 8299 df-wrecs 8330 df-recs 8379 df-rdg 8418 df-1o 8476 df-oadd 8480 df-er 8717 df-map 8849 df-pm 8850 df-en 8974 df-dom 8975 df-sdom 8976 df-fin 8977 df-dju 9982 df-card 10020 df-pnf 11345 df-mnf 11346 df-xr 11347 df-ltxr 11348 df-le 11349 df-sub 11543 df-neg 11544 df-nn 12336 df-2 12405 df-n0 12607 df-xnn0 12680 df-z 12694 df-uz 12966 df-fz 13640 df-fzo 13789 df-hash 14475 df-word 14659 df-concat 14716 df-s1 14743 df-s2 14999 df-edg 29626 df-uhgr 29636 df-wlks 30180 df-wlkson 30181 df-trls 30275 df-trlson 30276 df-pths 30299 df-pthson 30301 df-cycls 30374 df-acycgr 30749 |
| This theorem is used by: upgracycumgr 35960 |
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