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Theorem wlkiswwlks2lem4 29394

Description: Lemma 4 for wlkiswwlks2 29397. (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 29391	. . 3 ⊢ ((𝑃 ∈ Word 𝑉 ∧ 1 ≤ (♯‘𝑃)) → (♯‘𝐹) = ((♯‘𝑃) − 1))
3	2	3adant1 1129	. 2 ⊢ ((𝐺 ∈ USPGraph ∧ 𝑃 ∈ Word 𝑉 ∧ 1 ≤ (♯‘𝑃)) → (♯‘𝐹) = ((♯‘𝑃) − 1))
4		lencl 14488	. . . . . . . . . 10 ⊢ (𝑃 ∈ Word 𝑉 → (♯‘𝑃) ∈ ℕ₀)
5	4	3ad2ant2 1133	. . . . . . . . 9 ⊢ ((𝐺 ∈ USPGraph ∧ 𝑃 ∈ Word 𝑉 ∧ 1 ≤ (♯‘𝑃)) → (♯‘𝑃) ∈ ℕ₀)
6	1	wlkiswwlks2lem2 29392	. . . . . . . . 9 ⊢ (((♯‘𝑃) ∈ ℕ₀ ∧ 𝑖 ∈ (0..^((♯‘𝑃) − 1))) → (𝐹‘𝑖) = (^◡𝐸‘{(𝑃‘𝑖), (𝑃‘(𝑖 + 1))}))
7	5, 6	sylan 579	. . . . . . . 8 ⊢ (((𝐺 ∈ USPGraph ∧ 𝑃 ∈ Word 𝑉 ∧ 1 ≤ (♯‘𝑃)) ∧ 𝑖 ∈ (0..^((♯‘𝑃) − 1))) → (𝐹‘𝑖) = (^◡𝐸‘{(𝑃‘𝑖), (𝑃‘(𝑖 + 1))}))
8	7	adantr 480	. . . . . . 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 6895	. . . . . 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 28701	. . . . . . . . . 10 ⊢ (𝐺 ∈ USPGraph → 𝐸:dom 𝐸–1-1-onto→(Edg‘𝐺))
12	10	rneqi 5936	. . . . . . . . . . . 12 ⊢ ran 𝐸 = ran (iEdg‘𝐺)
13		edgval 28577	. . . . . . . . . . . 12 ⊢ (Edg‘𝐺) = ran (iEdg‘𝐺)
14	12, 13	eqtr4i 2762	. . . . . . . . . . 11 ⊢ ran 𝐸 = (Edg‘𝐺)
15		f1oeq3 6823	. . . . . . . . . . 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 1132	. . . . . . . 8 ⊢ ((𝐺 ∈ USPGraph ∧ 𝑃 ∈ Word 𝑉 ∧ 1 ≤ (♯‘𝑃)) → 𝐸:dom 𝐸–1-1-onto→ran 𝐸)
19	18	adantr 480	. . . . . . 7 ⊢ (((𝐺 ∈ USPGraph ∧ 𝑃 ∈ Word 𝑉 ∧ 1 ≤ (♯‘𝑃)) ∧ 𝑖 ∈ (0..^((♯‘𝑃) − 1))) → 𝐸:dom 𝐸–1-1-onto→ran 𝐸)
20		f1ocnvfv2 7278	. . . . . . 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 579	. . . . . 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 2771	. . . . 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 412	. . . 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 3166	. . 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 7420	. . . . 5 ⊢ ((♯‘𝐹) = ((♯‘𝑃) − 1) → (0..^(♯‘𝐹)) = (0..^((♯‘𝑃) − 1)))
26	25	raleqdv 3324	. . . 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 340	. . 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 395 ∧ w3a 1086 = wceq 1540 ∈ wcel 2105 ∀wral 3060 {cpr 4630 class class class wbr 5148 ↦ cmpt 5231 ^◡ccnv 5675 dom cdm 5676 ran crn 5677 –1-1-onto→wf1o 6542 ‘cfv 6543 (class class class)co 7412 0cc0 11114 1c1 11115 + caddc 11117 ≤ cle 11254 − cmin 11449 ℕ₀cn0 12477 ..^cfzo 13632 ♯chash 14295 Word cword 14469 iEdgciedg 28525 Edgcedg 28575 USPGraphcuspgr 28676

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1912 ax-6 1970 ax-7 2010 ax-8 2107 ax-9 2115 ax-10 2136 ax-11 2153 ax-12 2170 ax-ext 2702 ax-rep 5285 ax-sep 5299 ax-nul 5306 ax-pow 5363 ax-pr 5427 ax-un 7729 ax-cnex 11170 ax-resscn 11171 ax-1cn 11172 ax-icn 11173 ax-addcl 11174 ax-addrcl 11175 ax-mulcl 11176 ax-mulrcl 11177 ax-mulcom 11178 ax-addass 11179 ax-mulass 11180 ax-distr 11181 ax-i2m1 11182 ax-1ne0 11183 ax-1rid 11184 ax-rnegex 11185 ax-rrecex 11186 ax-cnre 11187 ax-pre-lttri 11188 ax-pre-lttrn 11189 ax-pre-ltadd 11190 ax-pre-mulgt0 11191

This theorem depends on definitions: df-bi 206 df-an 396 df-or 845 df-3or 1087 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1781 df-nf 1785 df-sb 2067 df-mo 2533 df-eu 2562 df-clab 2709 df-cleq 2723 df-clel 2809 df-nfc 2884 df-ne 2940 df-nel 3046 df-ral 3061 df-rex 3070 df-reu 3376 df-rab 3432 df-v 3475 df-sbc 3778 df-csb 3894 df-dif 3951 df-un 3953 df-in 3955 df-ss 3965 df-pss 3967 df-nul 4323 df-if 4529 df-pw 4604 df-sn 4629 df-pr 4631 df-op 4635 df-uni 4909 df-int 4951 df-iun 4999 df-br 5149 df-opab 5211 df-mpt 5232 df-tr 5266 df-id 5574 df-eprel 5580 df-po 5588 df-so 5589 df-fr 5631 df-we 5633 df-xp 5682 df-rel 5683 df-cnv 5684 df-co 5685 df-dm 5686 df-rn 5687 df-res 5688 df-ima 5689 df-pred 6300 df-ord 6367 df-on 6368 df-lim 6369 df-suc 6370 df-iota 6495 df-fun 6545 df-fn 6546 df-f 6547 df-f1 6548 df-fo 6549 df-f1o 6550 df-fv 6551 df-riota 7368 df-ov 7415 df-oprab 7416 df-mpo 7417 df-om 7860 df-1st 7979 df-2nd 7980 df-frecs 8270 df-wrecs 8301 df-recs 8375 df-rdg 8414 df-1o 8470 df-er 8707 df-en 8944 df-dom 8945 df-sdom 8946 df-fin 8947 df-card 9938 df-pnf 11255 df-mnf 11256 df-xr 11257 df-ltxr 11258 df-le 11259 df-sub 11451 df-neg 11452 df-nn 12218 df-n0 12478 df-z 12564 df-uz 12828 df-fz 13490 df-fzo 13633 df-hash 14296 df-word 14470 df-edg 28576 df-uspgr 28678

This theorem is referenced by: wlkiswwlks2lem6 29396

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