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| Mirrors > Home > MPE Home > Th. List > Mathboxes > 2cycld | Structured version Visualization version GIF version | ||
| Description: Construction of a 2-cycle from two given edges in a graph. (Contributed by BTernaryTau, 16-Oct-2023.) |
| Ref | Expression |
|---|---|
| 2cycld.1 | ⊢ 𝑃 = 〈“𝐴𝐵𝐶”〉 |
| 2cycld.2 | ⊢ 𝐹 = 〈“𝐽𝐾”〉 |
| 2cycld.3 | ⊢ (𝜑 → (𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑉 ∧ 𝐶 ∈ 𝑉)) |
| 2cycld.4 | ⊢ (𝜑 → (𝐴 ≠ 𝐵 ∧ 𝐵 ≠ 𝐶)) |
| 2cycld.5 | ⊢ (𝜑 → ({𝐴, 𝐵} ⊆ (𝐼‘𝐽) ∧ {𝐵, 𝐶} ⊆ (𝐼‘𝐾))) |
| 2cycld.6 | ⊢ 𝑉 = (Vtx‘𝐺) |
| 2cycld.7 | ⊢ 𝐼 = (iEdg‘𝐺) |
| 2cycld.8 | ⊢ (𝜑 → 𝐽 ≠ 𝐾) |
| 2cycld.9 | ⊢ (𝜑 → 𝐴 = 𝐶) |
| Ref | Expression |
|---|---|
| 2cycld | ⊢ (𝜑 → 𝐹(Cycles‘𝐺)𝑃) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 2cycld.1 | . . 3 ⊢ 𝑃 = 〈“𝐴𝐵𝐶”〉 | |
| 2 | 2cycld.2 | . . 3 ⊢ 𝐹 = 〈“𝐽𝐾”〉 | |
| 3 | 2cycld.3 | . . 3 ⊢ (𝜑 → (𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑉 ∧ 𝐶 ∈ 𝑉)) | |
| 4 | 2cycld.4 | . . 3 ⊢ (𝜑 → (𝐴 ≠ 𝐵 ∧ 𝐵 ≠ 𝐶)) | |
| 5 | 2cycld.5 | . . 3 ⊢ (𝜑 → ({𝐴, 𝐵} ⊆ (𝐼‘𝐽) ∧ {𝐵, 𝐶} ⊆ (𝐼‘𝐾))) | |
| 6 | 2cycld.6 | . . 3 ⊢ 𝑉 = (Vtx‘𝐺) | |
| 7 | 2cycld.7 | . . 3 ⊢ 𝐼 = (iEdg‘𝐺) | |
| 8 | 2cycld.8 | . . 3 ⊢ (𝜑 → 𝐽 ≠ 𝐾) | |
| 9 | 1, 2, 3, 4, 5, 6, 7, 8 | 2pthd 30255 | . 2 ⊢ (𝜑 → 𝐹(Paths‘𝐺)𝑃) |
| 10 | 2cycld.9 | . . 3 ⊢ (𝜑 → 𝐴 = 𝐶) | |
| 11 | 1 | fveq1i 6882 | . . . . . . 7 ⊢ (𝑃‘0) = (〈“𝐴𝐵𝐶”〉‘0) |
| 12 | s3fv0 14928 | . . . . . . 7 ⊢ (𝐴 ∈ 𝑉 → (〈“𝐴𝐵𝐶”〉‘0) = 𝐴) | |
| 13 | 11, 12 | eqtrid 2808 | . . . . . 6 ⊢ (𝐴 ∈ 𝑉 → (𝑃‘0) = 𝐴) |
| 14 | 13 | 3ad2ant1 1149 | . . . . 5 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑉 ∧ 𝐶 ∈ 𝑉) → (𝑃‘0) = 𝐴) |
| 15 | 14 | adantr 485 | . . . 4 ⊢ (((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑉 ∧ 𝐶 ∈ 𝑉) ∧ 𝐴 = 𝐶) → (𝑃‘0) = 𝐴) |
| 16 | simpr 489 | . . . 4 ⊢ (((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑉 ∧ 𝐶 ∈ 𝑉) ∧ 𝐴 = 𝐶) → 𝐴 = 𝐶) | |
| 17 | 2 | fveq2i 6884 | . . . . . . . . 9 ⊢ (♯‘𝐹) = (♯‘〈“𝐽𝐾”〉) |
| 18 | s2len 14926 | . . . . . . . . 9 ⊢ (♯‘〈“𝐽𝐾”〉) = 2 | |
| 19 | 17, 18 | eqtri 2784 | . . . . . . . 8 ⊢ (♯‘𝐹) = 2 |
| 20 | 1, 19 | fveq12i 6887 | . . . . . . 7 ⊢ (𝑃‘(♯‘𝐹)) = (〈“𝐴𝐵𝐶”〉‘2) |
| 21 | s3fv2 14930 | . . . . . . 7 ⊢ (𝐶 ∈ 𝑉 → (〈“𝐴𝐵𝐶”〉‘2) = 𝐶) | |
| 22 | 20, 21 | eqtr2id 2809 | . . . . . 6 ⊢ (𝐶 ∈ 𝑉 → 𝐶 = (𝑃‘(♯‘𝐹))) |
| 23 | 22 | 3ad2ant3 1151 | . . . . 5 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑉 ∧ 𝐶 ∈ 𝑉) → 𝐶 = (𝑃‘(♯‘𝐹))) |
| 24 | 23 | adantr 485 | . . . 4 ⊢ (((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑉 ∧ 𝐶 ∈ 𝑉) ∧ 𝐴 = 𝐶) → 𝐶 = (𝑃‘(♯‘𝐹))) |
| 25 | 15, 16, 24 | 3eqtrd 2800 | . . 3 ⊢ (((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑉 ∧ 𝐶 ∈ 𝑉) ∧ 𝐴 = 𝐶) → (𝑃‘0) = (𝑃‘(♯‘𝐹))) |
| 26 | 3, 10, 25 | syl2anc 595 | . 2 ⊢ (𝜑 → (𝑃‘0) = (𝑃‘(♯‘𝐹))) |
| 27 | iscycl 30106 | . 2 ⊢ (𝐹(Cycles‘𝐺)𝑃 ↔ (𝐹(Paths‘𝐺)𝑃 ∧ (𝑃‘0) = (𝑃‘(♯‘𝐹)))) | |
| 28 | 9, 26, 27 | sylanbrc 594 | 1 ⊢ (𝜑 → 𝐹(Cycles‘𝐺)𝑃) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 400 ∧ w3a 1101 = wceq 1568 ∈ wcel 2141 ≠ wne 2956 ⊆ wss 3904 {cpr 4590 class class class wbr 5108 ‘cfv 6536 0cc0 11099 2c2 12294 ♯chash 14366 〈“cs2 14878 〈“cs3 14879 Vtxcvtx 29312 iEdgciedg 29313 Pathscpths 30025 Cyclesccycls 30100 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1823 ax-4 1837 ax-5 1938 ax-6 1995 ax-7 2036 ax-8 2143 ax-9 2151 ax-10 2174 ax-11 2190 ax-12 2211 ax-ext 2733 ax-rep 5237 ax-sep 5256 ax-nul 5268 ax-pow 5336 ax-pr 5404 ax-un 7732 ax-cnex 11155 ax-resscn 11156 ax-1cn 11157 ax-icn 11158 ax-addcl 11159 ax-addrcl 11160 ax-mulcl 11161 ax-mulrcl 11162 ax-mulcom 11163 ax-addass 11164 ax-mulass 11165 ax-distr 11166 ax-i2m1 11167 ax-1ne0 11168 ax-1rid 11169 ax-rnegex 11170 ax-rrecex 11171 ax-cnre 11172 ax-pre-lttri 11173 ax-pre-lttrn 11174 ax-pre-ltadd 11175 ax-pre-mulgt0 11176 |
| 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 1571 df-fal 1581 df-ex 1808 df-nf 1812 df-sb 2095 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-nel 3063 df-ral 3078 df-rex 3088 df-reu 3368 df-rab 3415 df-v 3455 df-sbc 3744 df-csb 3853 df-dif 3907 df-un 3909 df-in 3911 df-ss 3921 df-pss 3924 df-nul 4286 df-if 4487 df-pw 4563 df-sn 4589 df-pr 4591 df-tp 4593 df-op 4595 df-uni 4872 df-int 4912 df-iun 4957 df-br 5109 df-opab 5173 df-mpt 5192 df-tr 5218 df-id 5556 df-eprel 5561 df-po 5569 df-so 5570 df-fr 5614 df-we 5616 df-xp 5667 df-rel 5668 df-cnv 5669 df-co 5670 df-dm 5671 df-rn 5672 df-res 5673 df-ima 5674 df-pred 6302 df-ord 6363 df-on 6364 df-lim 6365 df-suc 6366 df-iota 6492 df-fun 6538 df-fn 6539 df-f 6540 df-f1 6541 df-fo 6542 df-f1o 6543 df-fv 6544 df-riota 7367 df-ov 7413 df-oprab 7414 df-mpo 7415 df-om 7862 df-1st 7985 df-2nd 7986 df-frecs 8277 df-wrecs 8308 df-recs 8357 df-rdg 8396 df-1o 8452 df-er 8693 df-map 8825 df-en 8943 df-dom 8944 df-sdom 8945 df-fin 8946 df-card 9924 df-pnf 11244 df-mnf 11245 df-xr 11246 df-ltxr 11247 df-le 11248 df-sub 11442 df-neg 11443 df-nn 12233 df-2 12302 df-3 12303 df-n0 12504 df-z 12591 df-uz 12862 df-fz 13535 df-fzo 13683 df-hash 14367 df-word 14551 df-concat 14608 df-s1 14634 df-s2 14885 df-s3 14886 df-wlks 29915 df-trls 30006 df-pths 30029 df-cycls 30102 |
| This theorem is referenced by: 2cycl2d 35597 |
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