clwwlknon - Metamath Proof Explorer

	Metamath Proof Explorer		< Previous Next > Nearby theorems
Mirrors > Home > MPE Home > Th. List > clwwlknon		Structured version Visualization version GIF version

Theorem clwwlknon 29852

Description: The set of closed walks on vertex 𝑋 of length 𝑁 in a graph 𝐺 as words over the set of vertices. (Contributed by Alexander van der Vekens, 14-Sep-2018.) (Revised by AV, 28-May-2021.) (Revised by AV, 24-Mar-2022.)

**Assertion**
Ref	Expression
clwwlknon	⊢ (𝑋(ClWWalksNOn‘𝐺)𝑁) = {𝑤 ∈ (𝑁 ClWWalksN 𝐺) ∣ (𝑤‘0) = 𝑋}

Distinct variable groups: 𝑤,𝐺 𝑤,𝑁 𝑤,𝑋

Proof of Theorem clwwlknon Dummy variables 𝑛 𝑣 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		eqeq2 2738	. . . 4 ⊢ (𝑣 = 𝑋 → ((𝑤‘0) = 𝑣 ↔ (𝑤‘0) = 𝑋))
2	1	rabbidv 3434	. . 3 ⊢ (𝑣 = 𝑋 → {𝑤 ∈ (𝑛 ClWWalksN 𝐺) ∣ (𝑤‘0) = 𝑣} = {𝑤 ∈ (𝑛 ClWWalksN 𝐺) ∣ (𝑤‘0) = 𝑋})
3		oveq1 7412	. . . 4 ⊢ (𝑛 = 𝑁 → (𝑛 ClWWalksN 𝐺) = (𝑁 ClWWalksN 𝐺))
4	3	rabeqdv 3441	. . 3 ⊢ (𝑛 = 𝑁 → {𝑤 ∈ (𝑛 ClWWalksN 𝐺) ∣ (𝑤‘0) = 𝑋} = {𝑤 ∈ (𝑁 ClWWalksN 𝐺) ∣ (𝑤‘0) = 𝑋})
5		clwwlknonmpo 29851	. . 3 ⊢ (ClWWalksNOn‘𝐺) = (𝑣 ∈ (Vtx‘𝐺), 𝑛 ∈ ℕ₀ ↦ {𝑤 ∈ (𝑛 ClWWalksN 𝐺) ∣ (𝑤‘0) = 𝑣})
6		ovex 7438	. . . 4 ⊢ (𝑁 ClWWalksN 𝐺) ∈ V
7	6	rabex 5325	. . 3 ⊢ {𝑤 ∈ (𝑁 ClWWalksN 𝐺) ∣ (𝑤‘0) = 𝑋} ∈ V
8	2, 4, 5, 7	ovmpo 7564	. 2 ⊢ ((𝑋 ∈ (Vtx‘𝐺) ∧ 𝑁 ∈ ℕ₀) → (𝑋(ClWWalksNOn‘𝐺)𝑁) = {𝑤 ∈ (𝑁 ClWWalksN 𝐺) ∣ (𝑤‘0) = 𝑋})
9	5	mpondm0 7644	. . 3 ⊢ (¬ (𝑋 ∈ (Vtx‘𝐺) ∧ 𝑁 ∈ ℕ₀) → (𝑋(ClWWalksNOn‘𝐺)𝑁) = ∅)
10		isclwwlkn 29789	. . . . . . . . . . 11 ⊢ (𝑤 ∈ (𝑁 ClWWalksN 𝐺) ↔ (𝑤 ∈ (ClWWalks‘𝐺) ∧ (♯‘𝑤) = 𝑁))
11		eqid 2726	. . . . . . . . . . . . . 14 ⊢ (Vtx‘𝐺) = (Vtx‘𝐺)
12	11	clwwlkbp 29747	. . . . . . . . . . . . 13 ⊢ (𝑤 ∈ (ClWWalks‘𝐺) → (𝐺 ∈ V ∧ 𝑤 ∈ Word (Vtx‘𝐺) ∧ 𝑤 ≠ ∅))
13		fstwrdne 14511	. . . . . . . . . . . . . 14 ⊢ ((𝑤 ∈ Word (Vtx‘𝐺) ∧ 𝑤 ≠ ∅) → (𝑤‘0) ∈ (Vtx‘𝐺))
14	13	3adant1 1127	. . . . . . . . . . . . 13 ⊢ ((𝐺 ∈ V ∧ 𝑤 ∈ Word (Vtx‘𝐺) ∧ 𝑤 ≠ ∅) → (𝑤‘0) ∈ (Vtx‘𝐺))
15	12, 14	syl 17	. . . . . . . . . . . 12 ⊢ (𝑤 ∈ (ClWWalks‘𝐺) → (𝑤‘0) ∈ (Vtx‘𝐺))
16	15	adantr 480	. . . . . . . . . . 11 ⊢ ((𝑤 ∈ (ClWWalks‘𝐺) ∧ (♯‘𝑤) = 𝑁) → (𝑤‘0) ∈ (Vtx‘𝐺))
17	10, 16	sylbi 216	. . . . . . . . . 10 ⊢ (𝑤 ∈ (𝑁 ClWWalksN 𝐺) → (𝑤‘0) ∈ (Vtx‘𝐺))
18	17	adantr 480	. . . . . . . . 9 ⊢ ((𝑤 ∈ (𝑁 ClWWalksN 𝐺) ∧ (𝑤‘0) = 𝑋) → (𝑤‘0) ∈ (Vtx‘𝐺))
19		eleq1 2815	. . . . . . . . . 10 ⊢ ((𝑤‘0) = 𝑋 → ((𝑤‘0) ∈ (Vtx‘𝐺) ↔ 𝑋 ∈ (Vtx‘𝐺)))
20	19	adantl 481	. . . . . . . . 9 ⊢ ((𝑤 ∈ (𝑁 ClWWalksN 𝐺) ∧ (𝑤‘0) = 𝑋) → ((𝑤‘0) ∈ (Vtx‘𝐺) ↔ 𝑋 ∈ (Vtx‘𝐺)))
21	18, 20	mpbid 231	. . . . . . . 8 ⊢ ((𝑤 ∈ (𝑁 ClWWalksN 𝐺) ∧ (𝑤‘0) = 𝑋) → 𝑋 ∈ (Vtx‘𝐺))
22		clwwlknnn 29795	. . . . . . . . . 10 ⊢ (𝑤 ∈ (𝑁 ClWWalksN 𝐺) → 𝑁 ∈ ℕ)
23	22	nnnn0d 12536	. . . . . . . . 9 ⊢ (𝑤 ∈ (𝑁 ClWWalksN 𝐺) → 𝑁 ∈ ℕ₀)
24	23	adantr 480	. . . . . . . 8 ⊢ ((𝑤 ∈ (𝑁 ClWWalksN 𝐺) ∧ (𝑤‘0) = 𝑋) → 𝑁 ∈ ℕ₀)
25	21, 24	jca 511	. . . . . . 7 ⊢ ((𝑤 ∈ (𝑁 ClWWalksN 𝐺) ∧ (𝑤‘0) = 𝑋) → (𝑋 ∈ (Vtx‘𝐺) ∧ 𝑁 ∈ ℕ₀))
26	25	ex 412	. . . . . 6 ⊢ (𝑤 ∈ (𝑁 ClWWalksN 𝐺) → ((𝑤‘0) = 𝑋 → (𝑋 ∈ (Vtx‘𝐺) ∧ 𝑁 ∈ ℕ₀)))
27	26	con3rr3 155	. . . . 5 ⊢ (¬ (𝑋 ∈ (Vtx‘𝐺) ∧ 𝑁 ∈ ℕ₀) → (𝑤 ∈ (𝑁 ClWWalksN 𝐺) → ¬ (𝑤‘0) = 𝑋))
28	27	ralrimiv 3139	. . . 4 ⊢ (¬ (𝑋 ∈ (Vtx‘𝐺) ∧ 𝑁 ∈ ℕ₀) → ∀𝑤 ∈ (𝑁 ClWWalksN 𝐺) ¬ (𝑤‘0) = 𝑋)
29		rabeq0 4379	. . . 4 ⊢ ({𝑤 ∈ (𝑁 ClWWalksN 𝐺) ∣ (𝑤‘0) = 𝑋} = ∅ ↔ ∀𝑤 ∈ (𝑁 ClWWalksN 𝐺) ¬ (𝑤‘0) = 𝑋)
30	28, 29	sylibr 233	. . 3 ⊢ (¬ (𝑋 ∈ (Vtx‘𝐺) ∧ 𝑁 ∈ ℕ₀) → {𝑤 ∈ (𝑁 ClWWalksN 𝐺) ∣ (𝑤‘0) = 𝑋} = ∅)
31	9, 30	eqtr4d 2769	. 2 ⊢ (¬ (𝑋 ∈ (Vtx‘𝐺) ∧ 𝑁 ∈ ℕ₀) → (𝑋(ClWWalksNOn‘𝐺)𝑁) = {𝑤 ∈ (𝑁 ClWWalksN 𝐺) ∣ (𝑤‘0) = 𝑋})
32	8, 31	pm2.61i 182	1 ⊢ (𝑋(ClWWalksNOn‘𝐺)𝑁) = {𝑤 ∈ (𝑁 ClWWalksN 𝐺) ∣ (𝑤‘0) = 𝑋}

Colors of variables: wff setvar class

Syntax hints: ¬ wn 3 ↔ wb 205 ∧ wa 395 ∧ w3a 1084 = wceq 1533 ∈ wcel 2098 ≠ wne 2934 ∀wral 3055 {crab 3426 Vcvv 3468 ∅c0 4317 ‘cfv 6537 (class class class)co 7405 0cc0 11112 ℕ₀cn0 12476 ♯chash 14295 Word cword 14470 Vtxcvtx 28764 ClWWalkscclwwlk 29743 ClWWalksN cclwwlkn 29786 ClWWalksNOncclwwlknon 29849

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1789 ax-4 1803 ax-5 1905 ax-6 1963 ax-7 2003 ax-8 2100 ax-9 2108 ax-10 2129 ax-11 2146 ax-12 2163 ax-ext 2697 ax-rep 5278 ax-sep 5292 ax-nul 5299 ax-pow 5356 ax-pr 5420 ax-un 7722 ax-cnex 11168 ax-resscn 11169 ax-1cn 11170 ax-icn 11171 ax-addcl 11172 ax-addrcl 11173 ax-mulcl 11174 ax-mulrcl 11175 ax-mulcom 11176 ax-addass 11177 ax-mulass 11178 ax-distr 11179 ax-i2m1 11180 ax-1ne0 11181 ax-1rid 11182 ax-rnegex 11183 ax-rrecex 11184 ax-cnre 11185 ax-pre-lttri 11186 ax-pre-lttrn 11187 ax-pre-ltadd 11188 ax-pre-mulgt0 11189

This theorem depends on definitions: df-bi 206 df-an 396 df-or 845 df-3or 1085 df-3an 1086 df-tru 1536 df-fal 1546 df-ex 1774 df-nf 1778 df-sb 2060 df-mo 2528 df-eu 2557 df-clab 2704 df-cleq 2718 df-clel 2804 df-nfc 2879 df-ne 2935 df-nel 3041 df-ral 3056 df-rex 3065 df-reu 3371 df-rab 3427 df-v 3470 df-sbc 3773 df-csb 3889 df-dif 3946 df-un 3948 df-in 3950 df-ss 3960 df-pss 3962 df-nul 4318 df-if 4524 df-pw 4599 df-sn 4624 df-pr 4626 df-op 4630 df-uni 4903 df-int 4944 df-iun 4992 df-br 5142 df-opab 5204 df-mpt 5225 df-tr 5259 df-id 5567 df-eprel 5573 df-po 5581 df-so 5582 df-fr 5624 df-we 5626 df-xp 5675 df-rel 5676 df-cnv 5677 df-co 5678 df-dm 5679 df-rn 5680 df-res 5681 df-ima 5682 df-pred 6294 df-ord 6361 df-on 6362 df-lim 6363 df-suc 6364 df-iota 6489 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 df-fo 6543 df-f1o 6544 df-fv 6545 df-riota 7361 df-ov 7408 df-oprab 7409 df-mpo 7410 df-om 7853 df-1st 7974 df-2nd 7975 df-frecs 8267 df-wrecs 8298 df-recs 8372 df-rdg 8411 df-1o 8467 df-oadd 8471 df-er 8705 df-map 8824 df-en 8942 df-dom 8943 df-sdom 8944 df-fin 8945 df-card 9936 df-pnf 11254 df-mnf 11255 df-xr 11256 df-ltxr 11257 df-le 11258 df-sub 11450 df-neg 11451 df-nn 12217 df-n0 12477 df-xnn0 12549 df-z 12563 df-uz 12827 df-fz 13491 df-fzo 13634 df-hash 14296 df-word 14471 df-clwwlk 29744 df-clwwlkn 29787 df-clwwlknon 29850

This theorem is referenced by: isclwwlknon 29853 clwwlknonfin 29856 clwwlknon1 29859 clwwlknon2 29864 clwwlknondisj 29873 clwwlkvbij 29875 extwwlkfab 30114 clwwlknonclwlknonf1o 30124

W3C validator