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Theorem wlkiswwlks2lem4 29126

Description: Lemma 4 for wlkiswwlks2 29129. (Contributed by Alexander van der Vekens, 20-Jul-2018.) (Revised by AV, 10-Apr-2021.)

**Hypotheses**
Ref	Expression
wlkiswwlks2lem.f	⊢ 𝐹 = (𝑥 ∈ (0..^((♯‘𝑃) − 1)) ↦ (^◡𝐸‘{(𝑃‘𝑥), (𝑃‘(𝑥 + 1))}))
wlkiswwlks2lem.e	⊢ 𝐸 = (iEdg‘𝐺)

**Assertion**
Ref	Expression
wlkiswwlks2lem4	⊢ ((𝐺 ∈ USPGraph ∧ 𝑃 ∈ Word 𝑉 ∧ 1 ≤ (♯‘𝑃)) → (∀𝑖 ∈ (0..^((♯‘𝑃) − 1)){(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ ran 𝐸 → ∀𝑖 ∈ (0..^(♯‘𝐹))(𝐸‘(𝐹‘𝑖)) = {(𝑃‘𝑖), (𝑃‘(𝑖 + 1))}))

Distinct variable groups: 𝑥,𝑃 𝑥,𝐸 𝑥,𝑉 𝑖,𝐹 𝑖,𝐺 𝑃,𝑖 𝑖,𝑉,𝑥 Allowed substitution hints: 𝐸(𝑖) 𝐹(𝑥) 𝐺(𝑥)

**Proof of Theorem wlkiswwlks2lem4**
Step	Hyp	Ref	Expression
1		wlkiswwlks2lem.f	. . . 4 ⊢ 𝐹 = (𝑥 ∈ (0..^((♯‘𝑃) − 1)) ↦ (^◡𝐸‘{(𝑃‘𝑥), (𝑃‘(𝑥 + 1))}))
2	1	wlkiswwlks2lem1 29123	. . 3 ⊢ ((𝑃 ∈ Word 𝑉 ∧ 1 ≤ (♯‘𝑃)) → (♯‘𝐹) = ((♯‘𝑃) − 1))
3	2	3adant1 1131	. 2 ⊢ ((𝐺 ∈ USPGraph ∧ 𝑃 ∈ Word 𝑉 ∧ 1 ≤ (♯‘𝑃)) → (♯‘𝐹) = ((♯‘𝑃) − 1))
4		lencl 14483	. . . . . . . . . 10 ⊢ (𝑃 ∈ Word 𝑉 → (♯‘𝑃) ∈ ℕ₀)
5	4	3ad2ant2 1135	. . . . . . . . 9 ⊢ ((𝐺 ∈ USPGraph ∧ 𝑃 ∈ Word 𝑉 ∧ 1 ≤ (♯‘𝑃)) → (♯‘𝑃) ∈ ℕ₀)
6	1	wlkiswwlks2lem2 29124	. . . . . . . . 9 ⊢ (((♯‘𝑃) ∈ ℕ₀ ∧ 𝑖 ∈ (0..^((♯‘𝑃) − 1))) → (𝐹‘𝑖) = (^◡𝐸‘{(𝑃‘𝑖), (𝑃‘(𝑖 + 1))}))
7	5, 6	sylan 581	. . . . . . . 8 ⊢ (((𝐺 ∈ USPGraph ∧ 𝑃 ∈ Word 𝑉 ∧ 1 ≤ (♯‘𝑃)) ∧ 𝑖 ∈ (0..^((♯‘𝑃) − 1))) → (𝐹‘𝑖) = (^◡𝐸‘{(𝑃‘𝑖), (𝑃‘(𝑖 + 1))}))
8	7	adantr 482	. . . . . . 7 ⊢ ((((𝐺 ∈ USPGraph ∧ 𝑃 ∈ Word 𝑉 ∧ 1 ≤ (♯‘𝑃)) ∧ 𝑖 ∈ (0..^((♯‘𝑃) − 1))) ∧ {(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ ran 𝐸) → (𝐹‘𝑖) = (^◡𝐸‘{(𝑃‘𝑖), (𝑃‘(𝑖 + 1))}))
9	8	fveq2d 6896	. . . . . 6 ⊢ ((((𝐺 ∈ USPGraph ∧ 𝑃 ∈ Word 𝑉 ∧ 1 ≤ (♯‘𝑃)) ∧ 𝑖 ∈ (0..^((♯‘𝑃) − 1))) ∧ {(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ ran 𝐸) → (𝐸‘(𝐹‘𝑖)) = (𝐸‘(^◡𝐸‘{(𝑃‘𝑖), (𝑃‘(𝑖 + 1))})))
10		wlkiswwlks2lem.e	. . . . . . . . . . 11 ⊢ 𝐸 = (iEdg‘𝐺)
11	10	uspgrf1oedg 28433	. . . . . . . . . 10 ⊢ (𝐺 ∈ USPGraph → 𝐸:dom 𝐸–1-1-onto→(Edg‘𝐺))
12	10	rneqi 5937	. . . . . . . . . . . 12 ⊢ ran 𝐸 = ran (iEdg‘𝐺)
13		edgval 28309	. . . . . . . . . . . 12 ⊢ (Edg‘𝐺) = ran (iEdg‘𝐺)
14	12, 13	eqtr4i 2764	. . . . . . . . . . 11 ⊢ ran 𝐸 = (Edg‘𝐺)
15		f1oeq3 6824	. . . . . . . . . . 11 ⊢ (ran 𝐸 = (Edg‘𝐺) → (𝐸:dom 𝐸–1-1-onto→ran 𝐸 ↔ 𝐸:dom 𝐸–1-1-onto→(Edg‘𝐺)))
16	14, 15	ax-mp 5	. . . . . . . . . 10 ⊢ (𝐸:dom 𝐸–1-1-onto→ran 𝐸 ↔ 𝐸:dom 𝐸–1-1-onto→(Edg‘𝐺))
17	11, 16	sylibr 233	. . . . . . . . 9 ⊢ (𝐺 ∈ USPGraph → 𝐸:dom 𝐸–1-1-onto→ran 𝐸)
18	17	3ad2ant1 1134	. . . . . . . 8 ⊢ ((𝐺 ∈ USPGraph ∧ 𝑃 ∈ Word 𝑉 ∧ 1 ≤ (♯‘𝑃)) → 𝐸:dom 𝐸–1-1-onto→ran 𝐸)
19	18	adantr 482	. . . . . . 7 ⊢ (((𝐺 ∈ USPGraph ∧ 𝑃 ∈ Word 𝑉 ∧ 1 ≤ (♯‘𝑃)) ∧ 𝑖 ∈ (0..^((♯‘𝑃) − 1))) → 𝐸:dom 𝐸–1-1-onto→ran 𝐸)
20		f1ocnvfv2 7275	. . . . . . 7 ⊢ ((𝐸:dom 𝐸–1-1-onto→ran 𝐸 ∧ {(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ ran 𝐸) → (𝐸‘(^◡𝐸‘{(𝑃‘𝑖), (𝑃‘(𝑖 + 1))})) = {(𝑃‘𝑖), (𝑃‘(𝑖 + 1))})
21	19, 20	sylan 581	. . . . . 6 ⊢ ((((𝐺 ∈ USPGraph ∧ 𝑃 ∈ Word 𝑉 ∧ 1 ≤ (♯‘𝑃)) ∧ 𝑖 ∈ (0..^((♯‘𝑃) − 1))) ∧ {(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ ran 𝐸) → (𝐸‘(^◡𝐸‘{(𝑃‘𝑖), (𝑃‘(𝑖 + 1))})) = {(𝑃‘𝑖), (𝑃‘(𝑖 + 1))})
22	9, 21	eqtrd 2773	. . . . 5 ⊢ ((((𝐺 ∈ USPGraph ∧ 𝑃 ∈ Word 𝑉 ∧ 1 ≤ (♯‘𝑃)) ∧ 𝑖 ∈ (0..^((♯‘𝑃) − 1))) ∧ {(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ ran 𝐸) → (𝐸‘(𝐹‘𝑖)) = {(𝑃‘𝑖), (𝑃‘(𝑖 + 1))})
23	22	ex 414	. . . 4 ⊢ (((𝐺 ∈ USPGraph ∧ 𝑃 ∈ Word 𝑉 ∧ 1 ≤ (♯‘𝑃)) ∧ 𝑖 ∈ (0..^((♯‘𝑃) − 1))) → ({(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ ran 𝐸 → (𝐸‘(𝐹‘𝑖)) = {(𝑃‘𝑖), (𝑃‘(𝑖 + 1))}))
24	23	ralimdva 3168	. . 3 ⊢ ((𝐺 ∈ USPGraph ∧ 𝑃 ∈ Word 𝑉 ∧ 1 ≤ (♯‘𝑃)) → (∀𝑖 ∈ (0..^((♯‘𝑃) − 1)){(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ ran 𝐸 → ∀𝑖 ∈ (0..^((♯‘𝑃) − 1))(𝐸‘(𝐹‘𝑖)) = {(𝑃‘𝑖), (𝑃‘(𝑖 + 1))}))
25		oveq2 7417	. . . . 5 ⊢ ((♯‘𝐹) = ((♯‘𝑃) − 1) → (0..^(♯‘𝐹)) = (0..^((♯‘𝑃) − 1)))
26	25	raleqdv 3326	. . . 4 ⊢ ((♯‘𝐹) = ((♯‘𝑃) − 1) → (∀𝑖 ∈ (0..^(♯‘𝐹))(𝐸‘(𝐹‘𝑖)) = {(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ↔ ∀𝑖 ∈ (0..^((♯‘𝑃) − 1))(𝐸‘(𝐹‘𝑖)) = {(𝑃‘𝑖), (𝑃‘(𝑖 + 1))}))
27	26	imbi2d 341	. . 3 ⊢ ((♯‘𝐹) = ((♯‘𝑃) − 1) → ((∀𝑖 ∈ (0..^((♯‘𝑃) − 1)){(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ ran 𝐸 → ∀𝑖 ∈ (0..^(♯‘𝐹))(𝐸‘(𝐹‘𝑖)) = {(𝑃‘𝑖), (𝑃‘(𝑖 + 1))}) ↔ (∀𝑖 ∈ (0..^((♯‘𝑃) − 1)){(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ ran 𝐸 → ∀𝑖 ∈ (0..^((♯‘𝑃) − 1))(𝐸‘(𝐹‘𝑖)) = {(𝑃‘𝑖), (𝑃‘(𝑖 + 1))})))
28	24, 27	imbitrrid 245	. 2 ⊢ ((♯‘𝐹) = ((♯‘𝑃) − 1) → ((𝐺 ∈ USPGraph ∧ 𝑃 ∈ Word 𝑉 ∧ 1 ≤ (♯‘𝑃)) → (∀𝑖 ∈ (0..^((♯‘𝑃) − 1)){(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ ran 𝐸 → ∀𝑖 ∈ (0..^(♯‘𝐹))(𝐸‘(𝐹‘𝑖)) = {(𝑃‘𝑖), (𝑃‘(𝑖 + 1))})))
29	3, 28	mpcom 38	1 ⊢ ((𝐺 ∈ USPGraph ∧ 𝑃 ∈ Word 𝑉 ∧ 1 ≤ (♯‘𝑃)) → (∀𝑖 ∈ (0..^((♯‘𝑃) − 1)){(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ ran 𝐸 → ∀𝑖 ∈ (0..^(♯‘𝐹))(𝐸‘(𝐹‘𝑖)) = {(𝑃‘𝑖), (𝑃‘(𝑖 + 1))}))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 205 ∧ wa 397 ∧ w3a 1088 = wceq 1542 ∈ wcel 2107 ∀wral 3062 {cpr 4631 class class class wbr 5149 ↦ cmpt 5232 ^◡ccnv 5676 dom cdm 5677 ran crn 5678 –1-1-onto→wf1o 6543 ‘cfv 6544 (class class class)co 7409 0cc0 11110 1c1 11111 + caddc 11113 ≤ cle 11249 − cmin 11444 ℕ₀cn0 12472 ..^cfzo 13627 ♯chash 14290 Word cword 14464 iEdgciedg 28257 Edgcedg 28307 USPGraphcuspgr 28408

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 1914 ax-6 1972 ax-7 2012 ax-8 2109 ax-9 2117 ax-10 2138 ax-11 2155 ax-12 2172 ax-ext 2704 ax-rep 5286 ax-sep 5300 ax-nul 5307 ax-pow 5364 ax-pr 5428 ax-un 7725 ax-cnex 11166 ax-resscn 11167 ax-1cn 11168 ax-icn 11169 ax-addcl 11170 ax-addrcl 11171 ax-mulcl 11172 ax-mulrcl 11173 ax-mulcom 11174 ax-addass 11175 ax-mulass 11176 ax-distr 11177 ax-i2m1 11178 ax-1ne0 11179 ax-1rid 11180 ax-rnegex 11181 ax-rrecex 11182 ax-cnre 11183 ax-pre-lttri 11184 ax-pre-lttrn 11185 ax-pre-ltadd 11186 ax-pre-mulgt0 11187

This theorem depends on definitions: df-bi 206 df-an 398 df-or 847 df-3or 1089 df-3an 1090 df-tru 1545 df-fal 1555 df-ex 1783 df-nf 1787 df-sb 2069 df-mo 2535 df-eu 2564 df-clab 2711 df-cleq 2725 df-clel 2811 df-nfc 2886 df-ne 2942 df-nel 3048 df-ral 3063 df-rex 3072 df-reu 3378 df-rab 3434 df-v 3477 df-sbc 3779 df-csb 3895 df-dif 3952 df-un 3954 df-in 3956 df-ss 3966 df-pss 3968 df-nul 4324 df-if 4530 df-pw 4605 df-sn 4630 df-pr 4632 df-op 4636 df-uni 4910 df-int 4952 df-iun 5000 df-br 5150 df-opab 5212 df-mpt 5233 df-tr 5267 df-id 5575 df-eprel 5581 df-po 5589 df-so 5590 df-fr 5632 df-we 5634 df-xp 5683 df-rel 5684 df-cnv 5685 df-co 5686 df-dm 5687 df-rn 5688 df-res 5689 df-ima 5690 df-pred 6301 df-ord 6368 df-on 6369 df-lim 6370 df-suc 6371 df-iota 6496 df-fun 6546 df-fn 6547 df-f 6548 df-f1 6549 df-fo 6550 df-f1o 6551 df-fv 6552 df-riota 7365 df-ov 7412 df-oprab 7413 df-mpo 7414 df-om 7856 df-1st 7975 df-2nd 7976 df-frecs 8266 df-wrecs 8297 df-recs 8371 df-rdg 8410 df-1o 8466 df-er 8703 df-en 8940 df-dom 8941 df-sdom 8942 df-fin 8943 df-card 9934 df-pnf 11250 df-mnf 11251 df-xr 11252 df-ltxr 11253 df-le 11254 df-sub 11446 df-neg 11447 df-nn 12213 df-n0 12473 df-z 12559 df-uz 12823 df-fz 13485 df-fzo 13628 df-hash 14291 df-word 14465 df-edg 28308 df-uspgr 28410

This theorem is referenced by: wlkiswwlks2lem6 29128

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