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Theorem clwwlkfo 29570

Description: Lemma 4 for clwwlkf1o 29571: F is an onto function. (Contributed by Alexander van der Vekens, 29-Sep-2018.) (Revised by AV, 26-Apr-2021.) (Revised by AV, 1-Nov-2022.)

**Hypotheses**
Ref	Expression
clwwlkf1o.d	⊢ 𝐷 = {𝑤 ∈ (𝑁 WWalksN 𝐺) ∣ (lastS‘𝑤) = (𝑤‘0)}
clwwlkf1o.f	⊢ 𝐹 = (𝑡 ∈ 𝐷 ↦ (𝑡 prefix 𝑁))

**Assertion**
Ref	Expression
clwwlkfo	⊢ (𝑁 ∈ ℕ → 𝐹:𝐷–onto→(𝑁 ClWWalksN 𝐺))

Distinct variable groups: 𝑤,𝐺 𝑤,𝑁 𝑡,𝐷 𝑡,𝐺,𝑤 𝑡,𝑁 Allowed substitution hints: 𝐷(𝑤) 𝐹(𝑤,𝑡)

Proof of Theorem clwwlkfo Dummy variables 𝑖 𝑥 𝑝 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		clwwlkf1o.d	. . 3 ⊢ 𝐷 = {𝑤 ∈ (𝑁 WWalksN 𝐺) ∣ (lastS‘𝑤) = (𝑤‘0)}
2		clwwlkf1o.f	. . 3 ⊢ 𝐹 = (𝑡 ∈ 𝐷 ↦ (𝑡 prefix 𝑁))
3	1, 2	clwwlkf 29567	. 2 ⊢ (𝑁 ∈ ℕ → 𝐹:𝐷⟶(𝑁 ClWWalksN 𝐺))
4		eqid 2730	. . . . . . . 8 ⊢ (Vtx‘𝐺) = (Vtx‘𝐺)
5		eqid 2730	. . . . . . . 8 ⊢ (Edg‘𝐺) = (Edg‘𝐺)
6	4, 5	clwwlknp 29557	. . . . . . 7 ⊢ (𝑝 ∈ (𝑁 ClWWalksN 𝐺) → ((𝑝 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑝) = 𝑁) ∧ ∀𝑖 ∈ (0..^(𝑁 − 1)){(𝑝‘𝑖), (𝑝‘(𝑖 + 1))} ∈ (Edg‘𝐺) ∧ {(lastS‘𝑝), (𝑝‘0)} ∈ (Edg‘𝐺)))
7		simpr 483	. . . . . . . . . 10 ⊢ ((((𝑝 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑝) = 𝑁) ∧ ∀𝑖 ∈ (0..^(𝑁 − 1)){(𝑝‘𝑖), (𝑝‘(𝑖 + 1))} ∈ (Edg‘𝐺) ∧ {(lastS‘𝑝), (𝑝‘0)} ∈ (Edg‘𝐺)) ∧ 𝑁 ∈ ℕ) → 𝑁 ∈ ℕ)
8		simpl1 1189	. . . . . . . . . 10 ⊢ ((((𝑝 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑝) = 𝑁) ∧ ∀𝑖 ∈ (0..^(𝑁 − 1)){(𝑝‘𝑖), (𝑝‘(𝑖 + 1))} ∈ (Edg‘𝐺) ∧ {(lastS‘𝑝), (𝑝‘0)} ∈ (Edg‘𝐺)) ∧ 𝑁 ∈ ℕ) → (𝑝 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑝) = 𝑁))
9		3simpc 1148	. . . . . . . . . . 11 ⊢ (((𝑝 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑝) = 𝑁) ∧ ∀𝑖 ∈ (0..^(𝑁 − 1)){(𝑝‘𝑖), (𝑝‘(𝑖 + 1))} ∈ (Edg‘𝐺) ∧ {(lastS‘𝑝), (𝑝‘0)} ∈ (Edg‘𝐺)) → (∀𝑖 ∈ (0..^(𝑁 − 1)){(𝑝‘𝑖), (𝑝‘(𝑖 + 1))} ∈ (Edg‘𝐺) ∧ {(lastS‘𝑝), (𝑝‘0)} ∈ (Edg‘𝐺)))
10	9	adantr 479	. . . . . . . . . 10 ⊢ ((((𝑝 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑝) = 𝑁) ∧ ∀𝑖 ∈ (0..^(𝑁 − 1)){(𝑝‘𝑖), (𝑝‘(𝑖 + 1))} ∈ (Edg‘𝐺) ∧ {(lastS‘𝑝), (𝑝‘0)} ∈ (Edg‘𝐺)) ∧ 𝑁 ∈ ℕ) → (∀𝑖 ∈ (0..^(𝑁 − 1)){(𝑝‘𝑖), (𝑝‘(𝑖 + 1))} ∈ (Edg‘𝐺) ∧ {(lastS‘𝑝), (𝑝‘0)} ∈ (Edg‘𝐺)))
11	1	clwwlkel 29566	. . . . . . . . . 10 ⊢ ((𝑁 ∈ ℕ ∧ (𝑝 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑝) = 𝑁) ∧ (∀𝑖 ∈ (0..^(𝑁 − 1)){(𝑝‘𝑖), (𝑝‘(𝑖 + 1))} ∈ (Edg‘𝐺) ∧ {(lastS‘𝑝), (𝑝‘0)} ∈ (Edg‘𝐺))) → (𝑝 ++ ⟨“(𝑝‘0)”⟩) ∈ 𝐷)
12	7, 8, 10, 11	syl3anc 1369	. . . . . . . . 9 ⊢ ((((𝑝 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑝) = 𝑁) ∧ ∀𝑖 ∈ (0..^(𝑁 − 1)){(𝑝‘𝑖), (𝑝‘(𝑖 + 1))} ∈ (Edg‘𝐺) ∧ {(lastS‘𝑝), (𝑝‘0)} ∈ (Edg‘𝐺)) ∧ 𝑁 ∈ ℕ) → (𝑝 ++ ⟨“(𝑝‘0)”⟩) ∈ 𝐷)
13		oveq2 7419	. . . . . . . . . . . . . 14 ⊢ (𝑁 = (♯‘𝑝) → ((𝑝 ++ ⟨“(𝑝‘0)”⟩) prefix 𝑁) = ((𝑝 ++ ⟨“(𝑝‘0)”⟩) prefix (♯‘𝑝)))
14	13	eqcoms 2738	. . . . . . . . . . . . 13 ⊢ ((♯‘𝑝) = 𝑁 → ((𝑝 ++ ⟨“(𝑝‘0)”⟩) prefix 𝑁) = ((𝑝 ++ ⟨“(𝑝‘0)”⟩) prefix (♯‘𝑝)))
15	14	adantl 480	. . . . . . . . . . . 12 ⊢ ((𝑝 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑝) = 𝑁) → ((𝑝 ++ ⟨“(𝑝‘0)”⟩) prefix 𝑁) = ((𝑝 ++ ⟨“(𝑝‘0)”⟩) prefix (♯‘𝑝)))
16	15	3ad2ant1 1131	. . . . . . . . . . 11 ⊢ (((𝑝 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑝) = 𝑁) ∧ ∀𝑖 ∈ (0..^(𝑁 − 1)){(𝑝‘𝑖), (𝑝‘(𝑖 + 1))} ∈ (Edg‘𝐺) ∧ {(lastS‘𝑝), (𝑝‘0)} ∈ (Edg‘𝐺)) → ((𝑝 ++ ⟨“(𝑝‘0)”⟩) prefix 𝑁) = ((𝑝 ++ ⟨“(𝑝‘0)”⟩) prefix (♯‘𝑝)))
17	16	adantr 479	. . . . . . . . . 10 ⊢ ((((𝑝 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑝) = 𝑁) ∧ ∀𝑖 ∈ (0..^(𝑁 − 1)){(𝑝‘𝑖), (𝑝‘(𝑖 + 1))} ∈ (Edg‘𝐺) ∧ {(lastS‘𝑝), (𝑝‘0)} ∈ (Edg‘𝐺)) ∧ 𝑁 ∈ ℕ) → ((𝑝 ++ ⟨“(𝑝‘0)”⟩) prefix 𝑁) = ((𝑝 ++ ⟨“(𝑝‘0)”⟩) prefix (♯‘𝑝)))
18		simpll 763	. . . . . . . . . . . . 13 ⊢ (((𝑝 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑝) = 𝑁) ∧ 𝑁 ∈ ℕ) → 𝑝 ∈ Word (Vtx‘𝐺))
19		fstwrdne0 14510	. . . . . . . . . . . . . . 15 ⊢ ((𝑁 ∈ ℕ ∧ (𝑝 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑝) = 𝑁)) → (𝑝‘0) ∈ (Vtx‘𝐺))
20	19	ancoms 457	. . . . . . . . . . . . . 14 ⊢ (((𝑝 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑝) = 𝑁) ∧ 𝑁 ∈ ℕ) → (𝑝‘0) ∈ (Vtx‘𝐺))
21	20	s1cld 14557	. . . . . . . . . . . . 13 ⊢ (((𝑝 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑝) = 𝑁) ∧ 𝑁 ∈ ℕ) → ⟨“(𝑝‘0)”⟩ ∈ Word (Vtx‘𝐺))
22	18, 21	jca 510	. . . . . . . . . . . 12 ⊢ (((𝑝 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑝) = 𝑁) ∧ 𝑁 ∈ ℕ) → (𝑝 ∈ Word (Vtx‘𝐺) ∧ ⟨“(𝑝‘0)”⟩ ∈ Word (Vtx‘𝐺)))
23	22	3ad2antl1 1183	. . . . . . . . . . 11 ⊢ ((((𝑝 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑝) = 𝑁) ∧ ∀𝑖 ∈ (0..^(𝑁 − 1)){(𝑝‘𝑖), (𝑝‘(𝑖 + 1))} ∈ (Edg‘𝐺) ∧ {(lastS‘𝑝), (𝑝‘0)} ∈ (Edg‘𝐺)) ∧ 𝑁 ∈ ℕ) → (𝑝 ∈ Word (Vtx‘𝐺) ∧ ⟨“(𝑝‘0)”⟩ ∈ Word (Vtx‘𝐺)))
24		pfxccat1 14656	. . . . . . . . . . 11 ⊢ ((𝑝 ∈ Word (Vtx‘𝐺) ∧ ⟨“(𝑝‘0)”⟩ ∈ Word (Vtx‘𝐺)) → ((𝑝 ++ ⟨“(𝑝‘0)”⟩) prefix (♯‘𝑝)) = 𝑝)
25	23, 24	syl 17	. . . . . . . . . 10 ⊢ ((((𝑝 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑝) = 𝑁) ∧ ∀𝑖 ∈ (0..^(𝑁 − 1)){(𝑝‘𝑖), (𝑝‘(𝑖 + 1))} ∈ (Edg‘𝐺) ∧ {(lastS‘𝑝), (𝑝‘0)} ∈ (Edg‘𝐺)) ∧ 𝑁 ∈ ℕ) → ((𝑝 ++ ⟨“(𝑝‘0)”⟩) prefix (♯‘𝑝)) = 𝑝)
26	17, 25	eqtr2d 2771	. . . . . . . . 9 ⊢ ((((𝑝 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑝) = 𝑁) ∧ ∀𝑖 ∈ (0..^(𝑁 − 1)){(𝑝‘𝑖), (𝑝‘(𝑖 + 1))} ∈ (Edg‘𝐺) ∧ {(lastS‘𝑝), (𝑝‘0)} ∈ (Edg‘𝐺)) ∧ 𝑁 ∈ ℕ) → 𝑝 = ((𝑝 ++ ⟨“(𝑝‘0)”⟩) prefix 𝑁))
27	12, 26	jca 510	. . . . . . . 8 ⊢ ((((𝑝 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑝) = 𝑁) ∧ ∀𝑖 ∈ (0..^(𝑁 − 1)){(𝑝‘𝑖), (𝑝‘(𝑖 + 1))} ∈ (Edg‘𝐺) ∧ {(lastS‘𝑝), (𝑝‘0)} ∈ (Edg‘𝐺)) ∧ 𝑁 ∈ ℕ) → ((𝑝 ++ ⟨“(𝑝‘0)”⟩) ∈ 𝐷 ∧ 𝑝 = ((𝑝 ++ ⟨“(𝑝‘0)”⟩) prefix 𝑁)))
28	27	ex 411	. . . . . . 7 ⊢ (((𝑝 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑝) = 𝑁) ∧ ∀𝑖 ∈ (0..^(𝑁 − 1)){(𝑝‘𝑖), (𝑝‘(𝑖 + 1))} ∈ (Edg‘𝐺) ∧ {(lastS‘𝑝), (𝑝‘0)} ∈ (Edg‘𝐺)) → (𝑁 ∈ ℕ → ((𝑝 ++ ⟨“(𝑝‘0)”⟩) ∈ 𝐷 ∧ 𝑝 = ((𝑝 ++ ⟨“(𝑝‘0)”⟩) prefix 𝑁))))
29	6, 28	syl 17	. . . . . 6 ⊢ (𝑝 ∈ (𝑁 ClWWalksN 𝐺) → (𝑁 ∈ ℕ → ((𝑝 ++ ⟨“(𝑝‘0)”⟩) ∈ 𝐷 ∧ 𝑝 = ((𝑝 ++ ⟨“(𝑝‘0)”⟩) prefix 𝑁))))
30	29	impcom 406	. . . . 5 ⊢ ((𝑁 ∈ ℕ ∧ 𝑝 ∈ (𝑁 ClWWalksN 𝐺)) → ((𝑝 ++ ⟨“(𝑝‘0)”⟩) ∈ 𝐷 ∧ 𝑝 = ((𝑝 ++ ⟨“(𝑝‘0)”⟩) prefix 𝑁)))
31		oveq1 7418	. . . . . 6 ⊢ (𝑥 = (𝑝 ++ ⟨“(𝑝‘0)”⟩) → (𝑥 prefix 𝑁) = ((𝑝 ++ ⟨“(𝑝‘0)”⟩) prefix 𝑁))
32	31	rspceeqv 3632	. . . . 5 ⊢ (((𝑝 ++ ⟨“(𝑝‘0)”⟩) ∈ 𝐷 ∧ 𝑝 = ((𝑝 ++ ⟨“(𝑝‘0)”⟩) prefix 𝑁)) → ∃𝑥 ∈ 𝐷 𝑝 = (𝑥 prefix 𝑁))
33	30, 32	syl 17	. . . 4 ⊢ ((𝑁 ∈ ℕ ∧ 𝑝 ∈ (𝑁 ClWWalksN 𝐺)) → ∃𝑥 ∈ 𝐷 𝑝 = (𝑥 prefix 𝑁))
34	1, 2	clwwlkfv 29568	. . . . . . 7 ⊢ (𝑥 ∈ 𝐷 → (𝐹‘𝑥) = (𝑥 prefix 𝑁))
35	34	eqeq2d 2741	. . . . . 6 ⊢ (𝑥 ∈ 𝐷 → (𝑝 = (𝐹‘𝑥) ↔ 𝑝 = (𝑥 prefix 𝑁)))
36	35	adantl 480	. . . . 5 ⊢ (((𝑁 ∈ ℕ ∧ 𝑝 ∈ (𝑁 ClWWalksN 𝐺)) ∧ 𝑥 ∈ 𝐷) → (𝑝 = (𝐹‘𝑥) ↔ 𝑝 = (𝑥 prefix 𝑁)))
37	36	rexbidva 3174	. . . 4 ⊢ ((𝑁 ∈ ℕ ∧ 𝑝 ∈ (𝑁 ClWWalksN 𝐺)) → (∃𝑥 ∈ 𝐷 𝑝 = (𝐹‘𝑥) ↔ ∃𝑥 ∈ 𝐷 𝑝 = (𝑥 prefix 𝑁)))
38	33, 37	mpbird 256	. . 3 ⊢ ((𝑁 ∈ ℕ ∧ 𝑝 ∈ (𝑁 ClWWalksN 𝐺)) → ∃𝑥 ∈ 𝐷 𝑝 = (𝐹‘𝑥))
39	38	ralrimiva 3144	. 2 ⊢ (𝑁 ∈ ℕ → ∀𝑝 ∈ (𝑁 ClWWalksN 𝐺)∃𝑥 ∈ 𝐷 𝑝 = (𝐹‘𝑥))
40		dffo3 7102	. 2 ⊢ (𝐹:𝐷–onto→(𝑁 ClWWalksN 𝐺) ↔ (𝐹:𝐷⟶(𝑁 ClWWalksN 𝐺) ∧ ∀𝑝 ∈ (𝑁 ClWWalksN 𝐺)∃𝑥 ∈ 𝐷 𝑝 = (𝐹‘𝑥)))
41	3, 39, 40	sylanbrc 581	1 ⊢ (𝑁 ∈ ℕ → 𝐹:𝐷–onto→(𝑁 ClWWalksN 𝐺))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 205 ∧ wa 394 ∧ w3a 1085 = wceq 1539 ∈ wcel 2104 ∀wral 3059 ∃wrex 3068 {crab 3430 {cpr 4629 ↦ cmpt 5230 ⟶wf 6538 –onto→wfo 6540 ‘cfv 6542 (class class class)co 7411 0cc0 11112 1c1 11113 + caddc 11115 − cmin 11448 ℕcn 12216 ..^cfzo 13631 ♯chash 14294 Word cword 14468 lastSclsw 14516 ++ cconcat 14524 ⟨“cs1 14549 prefix cpfx 14624 Vtxcvtx 28523 Edgcedg 28574 WWalksN cwwlksn 29347 ClWWalksN cclwwlkn 29544

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1911 ax-6 1969 ax-7 2009 ax-8 2106 ax-9 2114 ax-10 2135 ax-11 2152 ax-12 2169 ax-ext 2701 ax-rep 5284 ax-sep 5298 ax-nul 5305 ax-pow 5362 ax-pr 5426 ax-un 7727 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 395 df-or 844 df-3or 1086 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2532 df-eu 2561 df-clab 2708 df-cleq 2722 df-clel 2808 df-nfc 2883 df-ne 2939 df-nel 3045 df-ral 3060 df-rex 3069 df-reu 3375 df-rab 3431 df-v 3474 df-sbc 3777 df-csb 3893 df-dif 3950 df-un 3952 df-in 3954 df-ss 3964 df-pss 3966 df-nul 4322 df-if 4528 df-pw 4603 df-sn 4628 df-pr 4630 df-op 4634 df-uni 4908 df-int 4950 df-iun 4998 df-br 5148 df-opab 5210 df-mpt 5231 df-tr 5265 df-id 5573 df-eprel 5579 df-po 5587 df-so 5588 df-fr 5630 df-we 5632 df-xp 5681 df-rel 5682 df-cnv 5683 df-co 5684 df-dm 5685 df-rn 5686 df-res 5687 df-ima 5688 df-pred 6299 df-ord 6366 df-on 6367 df-lim 6368 df-suc 6369 df-iota 6494 df-fun 6544 df-fn 6545 df-f 6546 df-f1 6547 df-fo 6548 df-f1o 6549 df-fv 6550 df-riota 7367 df-ov 7414 df-oprab 7415 df-mpo 7416 df-om 7858 df-1st 7977 df-2nd 7978 df-frecs 8268 df-wrecs 8299 df-recs 8373 df-rdg 8412 df-1o 8468 df-oadd 8472 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-rp 12979 df-fz 13489 df-fzo 13632 df-hash 14295 df-word 14469 df-lsw 14517 df-concat 14525 df-s1 14550 df-substr 14595 df-pfx 14625 df-wwlks 29351 df-wwlksn 29352 df-clwwlk 29502 df-clwwlkn 29545

This theorem is referenced by: clwwlkf1o 29571

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