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Mirrors > Home > MPE Home > Th. List > pthdepisspth | Structured version Visualization version GIF version |
Description: A path with different start and end points is a simple path (in an undirected graph). (Contributed by Alexander van der Vekens, 31-Oct-2017.) (Revised by AV, 12-Jan-2021.) (Proof shortened by AV, 30-Oct-2021.) |
Ref | Expression |
---|---|
pthdepisspth | ⊢ ((𝐹(Paths‘𝐺)𝑃 ∧ (𝑃‘0) ≠ (𝑃‘(♯‘𝐹))) → 𝐹(SPaths‘𝐺)𝑃) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ispth 28091 | . . . 4 ⊢ (𝐹(Paths‘𝐺)𝑃 ↔ (𝐹(Trails‘𝐺)𝑃 ∧ Fun ◡(𝑃 ↾ (1..^(♯‘𝐹))) ∧ ((𝑃 “ {0, (♯‘𝐹)}) ∩ (𝑃 “ (1..^(♯‘𝐹)))) = ∅)) | |
2 | simplll 772 | . . . . . 6 ⊢ ((((𝐹(Trails‘𝐺)𝑃 ∧ Fun ◡(𝑃 ↾ (1..^(♯‘𝐹)))) ∧ ((𝑃 “ {0, (♯‘𝐹)}) ∩ (𝑃 “ (1..^(♯‘𝐹)))) = ∅) ∧ (𝑃‘0) ≠ (𝑃‘(♯‘𝐹))) → 𝐹(Trails‘𝐺)𝑃) | |
3 | trliswlk 28065 | . . . . . . . . 9 ⊢ (𝐹(Trails‘𝐺)𝑃 → 𝐹(Walks‘𝐺)𝑃) | |
4 | wlkcl 27982 | . . . . . . . . 9 ⊢ (𝐹(Walks‘𝐺)𝑃 → (♯‘𝐹) ∈ ℕ0) | |
5 | 3, 4 | syl 17 | . . . . . . . 8 ⊢ (𝐹(Trails‘𝐺)𝑃 → (♯‘𝐹) ∈ ℕ0) |
6 | 5 | ad3antrrr 727 | . . . . . . 7 ⊢ ((((𝐹(Trails‘𝐺)𝑃 ∧ Fun ◡(𝑃 ↾ (1..^(♯‘𝐹)))) ∧ ((𝑃 “ {0, (♯‘𝐹)}) ∩ (𝑃 “ (1..^(♯‘𝐹)))) = ∅) ∧ (𝑃‘0) ≠ (𝑃‘(♯‘𝐹))) → (♯‘𝐹) ∈ ℕ0) |
7 | eqid 2738 | . . . . . . . . . . 11 ⊢ (Vtx‘𝐺) = (Vtx‘𝐺) | |
8 | 7 | wlkp 27983 | . . . . . . . . . 10 ⊢ (𝐹(Walks‘𝐺)𝑃 → 𝑃:(0...(♯‘𝐹))⟶(Vtx‘𝐺)) |
9 | 3, 8 | syl 17 | . . . . . . . . 9 ⊢ (𝐹(Trails‘𝐺)𝑃 → 𝑃:(0...(♯‘𝐹))⟶(Vtx‘𝐺)) |
10 | 9 | ad3antrrr 727 | . . . . . . . 8 ⊢ ((((𝐹(Trails‘𝐺)𝑃 ∧ Fun ◡(𝑃 ↾ (1..^(♯‘𝐹)))) ∧ ((𝑃 “ {0, (♯‘𝐹)}) ∩ (𝑃 “ (1..^(♯‘𝐹)))) = ∅) ∧ (𝑃‘0) ≠ (𝑃‘(♯‘𝐹))) → 𝑃:(0...(♯‘𝐹))⟶(Vtx‘𝐺)) |
11 | simpllr 773 | . . . . . . . 8 ⊢ ((((𝐹(Trails‘𝐺)𝑃 ∧ Fun ◡(𝑃 ↾ (1..^(♯‘𝐹)))) ∧ ((𝑃 “ {0, (♯‘𝐹)}) ∩ (𝑃 “ (1..^(♯‘𝐹)))) = ∅) ∧ (𝑃‘0) ≠ (𝑃‘(♯‘𝐹))) → Fun ◡(𝑃 ↾ (1..^(♯‘𝐹)))) | |
12 | simpr 485 | . . . . . . . 8 ⊢ ((((𝐹(Trails‘𝐺)𝑃 ∧ Fun ◡(𝑃 ↾ (1..^(♯‘𝐹)))) ∧ ((𝑃 “ {0, (♯‘𝐹)}) ∩ (𝑃 “ (1..^(♯‘𝐹)))) = ∅) ∧ (𝑃‘0) ≠ (𝑃‘(♯‘𝐹))) → (𝑃‘0) ≠ (𝑃‘(♯‘𝐹))) | |
13 | 10, 11, 12 | 3jca 1127 | . . . . . . 7 ⊢ ((((𝐹(Trails‘𝐺)𝑃 ∧ Fun ◡(𝑃 ↾ (1..^(♯‘𝐹)))) ∧ ((𝑃 “ {0, (♯‘𝐹)}) ∩ (𝑃 “ (1..^(♯‘𝐹)))) = ∅) ∧ (𝑃‘0) ≠ (𝑃‘(♯‘𝐹))) → (𝑃:(0...(♯‘𝐹))⟶(Vtx‘𝐺) ∧ Fun ◡(𝑃 ↾ (1..^(♯‘𝐹))) ∧ (𝑃‘0) ≠ (𝑃‘(♯‘𝐹)))) |
14 | simplr 766 | . . . . . . 7 ⊢ ((((𝐹(Trails‘𝐺)𝑃 ∧ Fun ◡(𝑃 ↾ (1..^(♯‘𝐹)))) ∧ ((𝑃 “ {0, (♯‘𝐹)}) ∩ (𝑃 “ (1..^(♯‘𝐹)))) = ∅) ∧ (𝑃‘0) ≠ (𝑃‘(♯‘𝐹))) → ((𝑃 “ {0, (♯‘𝐹)}) ∩ (𝑃 “ (1..^(♯‘𝐹)))) = ∅) | |
15 | injresinj 13508 | . . . . . . 7 ⊢ ((♯‘𝐹) ∈ ℕ0 → ((𝑃:(0...(♯‘𝐹))⟶(Vtx‘𝐺) ∧ Fun ◡(𝑃 ↾ (1..^(♯‘𝐹))) ∧ (𝑃‘0) ≠ (𝑃‘(♯‘𝐹))) → (((𝑃 “ {0, (♯‘𝐹)}) ∩ (𝑃 “ (1..^(♯‘𝐹)))) = ∅ → Fun ◡𝑃))) | |
16 | 6, 13, 14, 15 | syl3c 66 | . . . . . 6 ⊢ ((((𝐹(Trails‘𝐺)𝑃 ∧ Fun ◡(𝑃 ↾ (1..^(♯‘𝐹)))) ∧ ((𝑃 “ {0, (♯‘𝐹)}) ∩ (𝑃 “ (1..^(♯‘𝐹)))) = ∅) ∧ (𝑃‘0) ≠ (𝑃‘(♯‘𝐹))) → Fun ◡𝑃) |
17 | 2, 16 | jca 512 | . . . . 5 ⊢ ((((𝐹(Trails‘𝐺)𝑃 ∧ Fun ◡(𝑃 ↾ (1..^(♯‘𝐹)))) ∧ ((𝑃 “ {0, (♯‘𝐹)}) ∩ (𝑃 “ (1..^(♯‘𝐹)))) = ∅) ∧ (𝑃‘0) ≠ (𝑃‘(♯‘𝐹))) → (𝐹(Trails‘𝐺)𝑃 ∧ Fun ◡𝑃)) |
18 | 17 | ex3 1345 | . . . 4 ⊢ ((𝐹(Trails‘𝐺)𝑃 ∧ Fun ◡(𝑃 ↾ (1..^(♯‘𝐹))) ∧ ((𝑃 “ {0, (♯‘𝐹)}) ∩ (𝑃 “ (1..^(♯‘𝐹)))) = ∅) → ((𝑃‘0) ≠ (𝑃‘(♯‘𝐹)) → (𝐹(Trails‘𝐺)𝑃 ∧ Fun ◡𝑃))) |
19 | 1, 18 | sylbi 216 | . . 3 ⊢ (𝐹(Paths‘𝐺)𝑃 → ((𝑃‘0) ≠ (𝑃‘(♯‘𝐹)) → (𝐹(Trails‘𝐺)𝑃 ∧ Fun ◡𝑃))) |
20 | 19 | imp 407 | . 2 ⊢ ((𝐹(Paths‘𝐺)𝑃 ∧ (𝑃‘0) ≠ (𝑃‘(♯‘𝐹))) → (𝐹(Trails‘𝐺)𝑃 ∧ Fun ◡𝑃)) |
21 | isspth 28092 | . 2 ⊢ (𝐹(SPaths‘𝐺)𝑃 ↔ (𝐹(Trails‘𝐺)𝑃 ∧ Fun ◡𝑃)) | |
22 | 20, 21 | sylibr 233 | 1 ⊢ ((𝐹(Paths‘𝐺)𝑃 ∧ (𝑃‘0) ≠ (𝑃‘(♯‘𝐹))) → 𝐹(SPaths‘𝐺)𝑃) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 396 ∧ w3a 1086 = wceq 1539 ∈ wcel 2106 ≠ wne 2943 ∩ cin 3886 ∅c0 4256 {cpr 4563 class class class wbr 5074 ◡ccnv 5588 ↾ cres 5591 “ cima 5592 Fun wfun 6427 ⟶wf 6429 ‘cfv 6433 (class class class)co 7275 0cc0 10871 1c1 10872 ℕ0cn0 12233 ...cfz 13239 ..^cfzo 13382 ♯chash 14044 Vtxcvtx 27366 Walkscwlks 27963 Trailsctrls 28058 Pathscpths 28080 SPathscspths 28081 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2709 ax-rep 5209 ax-sep 5223 ax-nul 5230 ax-pow 5288 ax-pr 5352 ax-un 7588 ax-cnex 10927 ax-resscn 10928 ax-1cn 10929 ax-icn 10930 ax-addcl 10931 ax-addrcl 10932 ax-mulcl 10933 ax-mulrcl 10934 ax-mulcom 10935 ax-addass 10936 ax-mulass 10937 ax-distr 10938 ax-i2m1 10939 ax-1ne0 10940 ax-1rid 10941 ax-rnegex 10942 ax-rrecex 10943 ax-cnre 10944 ax-pre-lttri 10945 ax-pre-lttrn 10946 ax-pre-ltadd 10947 ax-pre-mulgt0 10948 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-ifp 1061 df-3or 1087 df-3an 1088 df-tru 1542 df-fal 1552 df-ex 1783 df-nf 1787 df-sb 2068 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2816 df-nfc 2889 df-ne 2944 df-nel 3050 df-ral 3069 df-rex 3070 df-reu 3072 df-rab 3073 df-v 3434 df-sbc 3717 df-csb 3833 df-dif 3890 df-un 3892 df-in 3894 df-ss 3904 df-pss 3906 df-nul 4257 df-if 4460 df-pw 4535 df-sn 4562 df-pr 4564 df-op 4568 df-uni 4840 df-int 4880 df-iun 4926 df-br 5075 df-opab 5137 df-mpt 5158 df-tr 5192 df-id 5489 df-eprel 5495 df-po 5503 df-so 5504 df-fr 5544 df-we 5546 df-xp 5595 df-rel 5596 df-cnv 5597 df-co 5598 df-dm 5599 df-rn 5600 df-res 5601 df-ima 5602 df-pred 6202 df-ord 6269 df-on 6270 df-lim 6271 df-suc 6272 df-iota 6391 df-fun 6435 df-fn 6436 df-f 6437 df-f1 6438 df-fo 6439 df-f1o 6440 df-fv 6441 df-riota 7232 df-ov 7278 df-oprab 7279 df-mpo 7280 df-om 7713 df-1st 7831 df-2nd 7832 df-frecs 8097 df-wrecs 8128 df-recs 8202 df-rdg 8241 df-1o 8297 df-er 8498 df-map 8617 df-en 8734 df-dom 8735 df-sdom 8736 df-fin 8737 df-card 9697 df-pnf 11011 df-mnf 11012 df-xr 11013 df-ltxr 11014 df-le 11015 df-sub 11207 df-neg 11208 df-nn 11974 df-n0 12234 df-z 12320 df-uz 12583 df-fz 13240 df-fzo 13383 df-hash 14045 df-word 14218 df-wlks 27966 df-trls 28060 df-pths 28084 df-spths 28085 |
This theorem is referenced by: pthisspthorcycl 33090 |
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