Theorem wlkiswwlks2 27181

Description: A walk as word corresponds to the sequence of vertices in a walk in a simple pseudograph. (Contributed by Alexander van der Vekens, 21-Jul-2018.) (Revised by AV, 10-Apr-2021.)

Assertion

Ref	Expression
wlkiswwlks2	⊢ (𝐺 ∈ USPGraph → (𝑃 ∈ (WWalks‘𝐺) → ∃𝑓 𝑓(Walks‘𝐺)𝑃))

Distinct variable groups:   𝑓,𝐺   𝑃,𝑓

Proof of Theorem wlkiswwlks2

Dummy variables 𝑖 𝑥 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		eqid 2825	. . . 4 ⊢ (Vtx‘𝐺) = (Vtx‘𝐺)
2	1	wwlkbp 27147	. . 3 ⊢ (𝑃 ∈ (WWalks‘𝐺) → (𝐺 ∈ V ∧ 𝑃 ∈ Word (Vtx‘𝐺)))
3		eqid 2825	. . . . 5 ⊢ (Edg‘𝐺) = (Edg‘𝐺)
4	1, 3	iswwlks 27142	. . . 4 ⊢ (𝑃 ∈ (WWalks‘𝐺) ↔ (𝑃 ≠ ∅ ∧ 𝑃 ∈ Word (Vtx‘𝐺) ∧ ∀𝑖 ∈ (0..^((♯‘𝑃) − 1)){(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ (Edg‘𝐺)))
5		ovex 6942	. . . . . . . . . . . . . . 15 ⊢ (0..^((♯‘𝑃) − 1)) ∈ V
6		mptexg 6745	. . . . . . . . . . . . . . 15 ⊢ ((0..^((♯‘𝑃) − 1)) ∈ V → (𝑥 ∈ (0..^((♯‘𝑃) − 1)) ↦ (◡(iEdg‘𝐺)‘{(𝑃‘𝑥), (𝑃‘(𝑥 + 1))})) ∈ V)
7	5, 6	mp1i 13	. . . . . . . . . . . . . 14 ⊢ (((𝑃 ≠ ∅ ∧ 𝑃 ∈ Word (Vtx‘𝐺)) ∧ ((𝐺 ∈ V ∧ 𝑃 ∈ Word (Vtx‘𝐺)) ∧ 𝐺 ∈ USPGraph)) → (𝑥 ∈ (0..^((♯‘𝑃) − 1)) ↦ (◡(iEdg‘𝐺)‘{(𝑃‘𝑥), (𝑃‘(𝑥 + 1))})) ∈ V)
8		simprr 789	. . . . . . . . . . . . . . . . . 18 ⊢ (((𝑃 ≠ ∅ ∧ 𝑃 ∈ Word (Vtx‘𝐺)) ∧ ((𝐺 ∈ V ∧ 𝑃 ∈ Word (Vtx‘𝐺)) ∧ 𝐺 ∈ USPGraph)) → 𝐺 ∈ USPGraph)
9		simplr 785	. . . . . . . . . . . . . . . . . 18 ⊢ (((𝑃 ≠ ∅ ∧ 𝑃 ∈ Word (Vtx‘𝐺)) ∧ ((𝐺 ∈ V ∧ 𝑃 ∈ Word (Vtx‘𝐺)) ∧ 𝐺 ∈ USPGraph)) → 𝑃 ∈ Word (Vtx‘𝐺))
10		hashge1 13475	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((𝑃 ∈ Word (Vtx‘𝐺) ∧ 𝑃 ≠ ∅) → 1 ≤ (♯‘𝑃))
11	10	ancoms 452	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝑃 ≠ ∅ ∧ 𝑃 ∈ Word (Vtx‘𝐺)) → 1 ≤ (♯‘𝑃))
12	11	adantr 474	. . . . . . . . . . . . . . . . . 18 ⊢ (((𝑃 ≠ ∅ ∧ 𝑃 ∈ Word (Vtx‘𝐺)) ∧ ((𝐺 ∈ V ∧ 𝑃 ∈ Word (Vtx‘𝐺)) ∧ 𝐺 ∈ USPGraph)) → 1 ≤ (♯‘𝑃))
13	8, 9, 12	3jca 1162	. . . . . . . . . . . . . . . . 17 ⊢ (((𝑃 ≠ ∅ ∧ 𝑃 ∈ Word (Vtx‘𝐺)) ∧ ((𝐺 ∈ V ∧ 𝑃 ∈ Word (Vtx‘𝐺)) ∧ 𝐺 ∈ USPGraph)) → (𝐺 ∈ USPGraph ∧ 𝑃 ∈ Word (Vtx‘𝐺) ∧ 1 ≤ (♯‘𝑃)))
14	13	adantr 474	. . . . . . . . . . . . . . . 16 ⊢ ((((𝑃 ≠ ∅ ∧ 𝑃 ∈ Word (Vtx‘𝐺)) ∧ ((𝐺 ∈ V ∧ 𝑃 ∈ Word (Vtx‘𝐺)) ∧ 𝐺 ∈ USPGraph)) ∧ 𝑓 = (𝑥 ∈ (0..^((♯‘𝑃) − 1)) ↦ (◡(iEdg‘𝐺)‘{(𝑃‘𝑥), (𝑃‘(𝑥 + 1))}))) → (𝐺 ∈ USPGraph ∧ 𝑃 ∈ Word (Vtx‘𝐺) ∧ 1 ≤ (♯‘𝑃)))
15		edgval 26354	. . . . . . . . . . . . . . . . . . . 20 ⊢ (Edg‘𝐺) = ran (iEdg‘𝐺)
16	15	a1i 11	. . . . . . . . . . . . . . . . . . 19 ⊢ ((((𝑃 ≠ ∅ ∧ 𝑃 ∈ Word (Vtx‘𝐺)) ∧ ((𝐺 ∈ V ∧ 𝑃 ∈ Word (Vtx‘𝐺)) ∧ 𝐺 ∈ USPGraph)) ∧ 𝑓 = (𝑥 ∈ (0..^((♯‘𝑃) − 1)) ↦ (◡(iEdg‘𝐺)‘{(𝑃‘𝑥), (𝑃‘(𝑥 + 1))}))) → (Edg‘𝐺) = ran (iEdg‘𝐺))
17	16	eleq2d 2892	. . . . . . . . . . . . . . . . . 18 ⊢ ((((𝑃 ≠ ∅ ∧ 𝑃 ∈ Word (Vtx‘𝐺)) ∧ ((𝐺 ∈ V ∧ 𝑃 ∈ Word (Vtx‘𝐺)) ∧ 𝐺 ∈ USPGraph)) ∧ 𝑓 = (𝑥 ∈ (0..^((♯‘𝑃) − 1)) ↦ (◡(iEdg‘𝐺)‘{(𝑃‘𝑥), (𝑃‘(𝑥 + 1))}))) → ({(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ (Edg‘𝐺) ↔ {(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ ran (iEdg‘𝐺)))
18	17	ralbidv 3195	. . . . . . . . . . . . . . . . 17 ⊢ ((((𝑃 ≠ ∅ ∧ 𝑃 ∈ Word (Vtx‘𝐺)) ∧ ((𝐺 ∈ V ∧ 𝑃 ∈ Word (Vtx‘𝐺)) ∧ 𝐺 ∈ USPGraph)) ∧ 𝑓 = (𝑥 ∈ (0..^((♯‘𝑃) − 1)) ↦ (◡(iEdg‘𝐺)‘{(𝑃‘𝑥), (𝑃‘(𝑥 + 1))}))) → (∀𝑖 ∈ (0..^((♯‘𝑃) − 1)){(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ (Edg‘𝐺) ↔ ∀𝑖 ∈ (0..^((♯‘𝑃) − 1)){(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ ran (iEdg‘𝐺)))
19	18	biimpd 221	. . . . . . . . . . . . . . . 16 ⊢ ((((𝑃 ≠ ∅ ∧ 𝑃 ∈ Word (Vtx‘𝐺)) ∧ ((𝐺 ∈ V ∧ 𝑃 ∈ Word (Vtx‘𝐺)) ∧ 𝐺 ∈ USPGraph)) ∧ 𝑓 = (𝑥 ∈ (0..^((♯‘𝑃) − 1)) ↦ (◡(iEdg‘𝐺)‘{(𝑃‘𝑥), (𝑃‘(𝑥 + 1))}))) → (∀𝑖 ∈ (0..^((♯‘𝑃) − 1)){(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ (Edg‘𝐺) → ∀𝑖 ∈ (0..^((♯‘𝑃) − 1)){(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ ran (iEdg‘𝐺)))
20		eqid 2825	. . . . . . . . . . . . . . . . 17 ⊢ (𝑥 ∈ (0..^((♯‘𝑃) − 1)) ↦ (◡(iEdg‘𝐺)‘{(𝑃‘𝑥), (𝑃‘(𝑥 + 1))})) = (𝑥 ∈ (0..^((♯‘𝑃) − 1)) ↦ (◡(iEdg‘𝐺)‘{(𝑃‘𝑥), (𝑃‘(𝑥 + 1))}))
21		eqid 2825	. . . . . . . . . . . . . . . . 17 ⊢ (iEdg‘𝐺) = (iEdg‘𝐺)
22	20, 21	wlkiswwlks2lem6 27180	. . . . . . . . . . . . . . . 16 ⊢ ((𝐺 ∈ USPGraph ∧ 𝑃 ∈ Word (Vtx‘𝐺) ∧ 1 ≤ (♯‘𝑃)) → (∀𝑖 ∈ (0..^((♯‘𝑃) − 1)){(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ ran (iEdg‘𝐺) → ((𝑥 ∈ (0..^((♯‘𝑃) − 1)) ↦ (◡(iEdg‘𝐺)‘{(𝑃‘𝑥), (𝑃‘(𝑥 + 1))})) ∈ Word dom (iEdg‘𝐺) ∧ 𝑃:(0...(♯‘(𝑥 ∈ (0..^((♯‘𝑃) − 1)) ↦ (◡(iEdg‘𝐺)‘{(𝑃‘𝑥), (𝑃‘(𝑥 + 1))}))))⟶(Vtx‘𝐺) ∧ ∀𝑖 ∈ (0..^(♯‘(𝑥 ∈ (0..^((♯‘𝑃) − 1)) ↦ (◡(iEdg‘𝐺)‘{(𝑃‘𝑥), (𝑃‘(𝑥 + 1))}))))((iEdg‘𝐺)‘((𝑥 ∈ (0..^((♯‘𝑃) − 1)) ↦ (◡(iEdg‘𝐺)‘{(𝑃‘𝑥), (𝑃‘(𝑥 + 1))}))‘𝑖)) = {(𝑃‘𝑖), (𝑃‘(𝑖 + 1))})))
23	14, 19, 22	sylsyld 61	. . . . . . . . . . . . . . 15 ⊢ ((((𝑃 ≠ ∅ ∧ 𝑃 ∈ Word (Vtx‘𝐺)) ∧ ((𝐺 ∈ V ∧ 𝑃 ∈ Word (Vtx‘𝐺)) ∧ 𝐺 ∈ USPGraph)) ∧ 𝑓 = (𝑥 ∈ (0..^((♯‘𝑃) − 1)) ↦ (◡(iEdg‘𝐺)‘{(𝑃‘𝑥), (𝑃‘(𝑥 + 1))}))) → (∀𝑖 ∈ (0..^((♯‘𝑃) − 1)){(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ (Edg‘𝐺) → ((𝑥 ∈ (0..^((♯‘𝑃) − 1)) ↦ (◡(iEdg‘𝐺)‘{(𝑃‘𝑥), (𝑃‘(𝑥 + 1))})) ∈ Word dom (iEdg‘𝐺) ∧ 𝑃:(0...(♯‘(𝑥 ∈ (0..^((♯‘𝑃) − 1)) ↦ (◡(iEdg‘𝐺)‘{(𝑃‘𝑥), (𝑃‘(𝑥 + 1))}))))⟶(Vtx‘𝐺) ∧ ∀𝑖 ∈ (0..^(♯‘(𝑥 ∈ (0..^((♯‘𝑃) − 1)) ↦ (◡(iEdg‘𝐺)‘{(𝑃‘𝑥), (𝑃‘(𝑥 + 1))}))))((iEdg‘𝐺)‘((𝑥 ∈ (0..^((♯‘𝑃) − 1)) ↦ (◡(iEdg‘𝐺)‘{(𝑃‘𝑥), (𝑃‘(𝑥 + 1))}))‘𝑖)) = {(𝑃‘𝑖), (𝑃‘(𝑖 + 1))})))
24		eleq1 2894	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑓 = (𝑥 ∈ (0..^((♯‘𝑃) − 1)) ↦ (◡(iEdg‘𝐺)‘{(𝑃‘𝑥), (𝑃‘(𝑥 + 1))})) → (𝑓 ∈ Word dom (iEdg‘𝐺) ↔ (𝑥 ∈ (0..^((♯‘𝑃) − 1)) ↦ (◡(iEdg‘𝐺)‘{(𝑃‘𝑥), (𝑃‘(𝑥 + 1))})) ∈ Word dom (iEdg‘𝐺)))
25		fveq2 6437	. . . . . . . . . . . . . . . . . . . 20 ⊢ (𝑓 = (𝑥 ∈ (0..^((♯‘𝑃) − 1)) ↦ (◡(iEdg‘𝐺)‘{(𝑃‘𝑥), (𝑃‘(𝑥 + 1))})) → (♯‘𝑓) = (♯‘(𝑥 ∈ (0..^((♯‘𝑃) − 1)) ↦ (◡(iEdg‘𝐺)‘{(𝑃‘𝑥), (𝑃‘(𝑥 + 1))}))))
26	25	oveq2d 6926	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝑓 = (𝑥 ∈ (0..^((♯‘𝑃) − 1)) ↦ (◡(iEdg‘𝐺)‘{(𝑃‘𝑥), (𝑃‘(𝑥 + 1))})) → (0...(♯‘𝑓)) = (0...(♯‘(𝑥 ∈ (0..^((♯‘𝑃) − 1)) ↦ (◡(iEdg‘𝐺)‘{(𝑃‘𝑥), (𝑃‘(𝑥 + 1))})))))
27	26	feq2d 6268	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑓 = (𝑥 ∈ (0..^((♯‘𝑃) − 1)) ↦ (◡(iEdg‘𝐺)‘{(𝑃‘𝑥), (𝑃‘(𝑥 + 1))})) → (𝑃:(0...(♯‘𝑓))⟶(Vtx‘𝐺) ↔ 𝑃:(0...(♯‘(𝑥 ∈ (0..^((♯‘𝑃) − 1)) ↦ (◡(iEdg‘𝐺)‘{(𝑃‘𝑥), (𝑃‘(𝑥 + 1))}))))⟶(Vtx‘𝐺)))
28	25	oveq2d 6926	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝑓 = (𝑥 ∈ (0..^((♯‘𝑃) − 1)) ↦ (◡(iEdg‘𝐺)‘{(𝑃‘𝑥), (𝑃‘(𝑥 + 1))})) → (0..^(♯‘𝑓)) = (0..^(♯‘(𝑥 ∈ (0..^((♯‘𝑃) − 1)) ↦ (◡(iEdg‘𝐺)‘{(𝑃‘𝑥), (𝑃‘(𝑥 + 1))})))))
29		fveq1 6436	. . . . . . . . . . . . . . . . . . . 20 ⊢ (𝑓 = (𝑥 ∈ (0..^((♯‘𝑃) − 1)) ↦ (◡(iEdg‘𝐺)‘{(𝑃‘𝑥), (𝑃‘(𝑥 + 1))})) → (𝑓‘𝑖) = ((𝑥 ∈ (0..^((♯‘𝑃) − 1)) ↦ (◡(iEdg‘𝐺)‘{(𝑃‘𝑥), (𝑃‘(𝑥 + 1))}))‘𝑖))
30	29	fveqeq2d 6445	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝑓 = (𝑥 ∈ (0..^((♯‘𝑃) − 1)) ↦ (◡(iEdg‘𝐺)‘{(𝑃‘𝑥), (𝑃‘(𝑥 + 1))})) → (((iEdg‘𝐺)‘(𝑓‘𝑖)) = {(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ↔ ((iEdg‘𝐺)‘((𝑥 ∈ (0..^((♯‘𝑃) − 1)) ↦ (◡(iEdg‘𝐺)‘{(𝑃‘𝑥), (𝑃‘(𝑥 + 1))}))‘𝑖)) = {(𝑃‘𝑖), (𝑃‘(𝑖 + 1))}))
31	28, 30	raleqbidv 3364	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑓 = (𝑥 ∈ (0..^((♯‘𝑃) − 1)) ↦ (◡(iEdg‘𝐺)‘{(𝑃‘𝑥), (𝑃‘(𝑥 + 1))})) → (∀𝑖 ∈ (0..^(♯‘𝑓))((iEdg‘𝐺)‘(𝑓‘𝑖)) = {(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ↔ ∀𝑖 ∈ (0..^(♯‘(𝑥 ∈ (0..^((♯‘𝑃) − 1)) ↦ (◡(iEdg‘𝐺)‘{(𝑃‘𝑥), (𝑃‘(𝑥 + 1))}))))((iEdg‘𝐺)‘((𝑥 ∈ (0..^((♯‘𝑃) − 1)) ↦ (◡(iEdg‘𝐺)‘{(𝑃‘𝑥), (𝑃‘(𝑥 + 1))}))‘𝑖)) = {(𝑃‘𝑖), (𝑃‘(𝑖 + 1))}))
32	24, 27, 31	3anbi123d 1564	. . . . . . . . . . . . . . . . 17 ⊢ (𝑓 = (𝑥 ∈ (0..^((♯‘𝑃) − 1)) ↦ (◡(iEdg‘𝐺)‘{(𝑃‘𝑥), (𝑃‘(𝑥 + 1))})) → ((𝑓 ∈ Word dom (iEdg‘𝐺) ∧ 𝑃:(0...(♯‘𝑓))⟶(Vtx‘𝐺) ∧ ∀𝑖 ∈ (0..^(♯‘𝑓))((iEdg‘𝐺)‘(𝑓‘𝑖)) = {(𝑃‘𝑖), (𝑃‘(𝑖 + 1))}) ↔ ((𝑥 ∈ (0..^((♯‘𝑃) − 1)) ↦ (◡(iEdg‘𝐺)‘{(𝑃‘𝑥), (𝑃‘(𝑥 + 1))})) ∈ Word dom (iEdg‘𝐺) ∧ 𝑃:(0...(♯‘(𝑥 ∈ (0..^((♯‘𝑃) − 1)) ↦ (◡(iEdg‘𝐺)‘{(𝑃‘𝑥), (𝑃‘(𝑥 + 1))}))))⟶(Vtx‘𝐺) ∧ ∀𝑖 ∈ (0..^(♯‘(𝑥 ∈ (0..^((♯‘𝑃) − 1)) ↦ (◡(iEdg‘𝐺)‘{(𝑃‘𝑥), (𝑃‘(𝑥 + 1))}))))((iEdg‘𝐺)‘((𝑥 ∈ (0..^((♯‘𝑃) − 1)) ↦ (◡(iEdg‘𝐺)‘{(𝑃‘𝑥), (𝑃‘(𝑥 + 1))}))‘𝑖)) = {(𝑃‘𝑖), (𝑃‘(𝑖 + 1))})))
33	32	imbi2d 332	. . . . . . . . . . . . . . . 16 ⊢ (𝑓 = (𝑥 ∈ (0..^((♯‘𝑃) − 1)) ↦ (◡(iEdg‘𝐺)‘{(𝑃‘𝑥), (𝑃‘(𝑥 + 1))})) → ((∀𝑖 ∈ (0..^((♯‘𝑃) − 1)){(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ (Edg‘𝐺) → (𝑓 ∈ Word dom (iEdg‘𝐺) ∧ 𝑃:(0...(♯‘𝑓))⟶(Vtx‘𝐺) ∧ ∀𝑖 ∈ (0..^(♯‘𝑓))((iEdg‘𝐺)‘(𝑓‘𝑖)) = {(𝑃‘𝑖), (𝑃‘(𝑖 + 1))})) ↔ (∀𝑖 ∈ (0..^((♯‘𝑃) − 1)){(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ (Edg‘𝐺) → ((𝑥 ∈ (0..^((♯‘𝑃) − 1)) ↦ (◡(iEdg‘𝐺)‘{(𝑃‘𝑥), (𝑃‘(𝑥 + 1))})) ∈ Word dom (iEdg‘𝐺) ∧ 𝑃:(0...(♯‘(𝑥 ∈ (0..^((♯‘𝑃) − 1)) ↦ (◡(iEdg‘𝐺)‘{(𝑃‘𝑥), (𝑃‘(𝑥 + 1))}))))⟶(Vtx‘𝐺) ∧ ∀𝑖 ∈ (0..^(♯‘(𝑥 ∈ (0..^((♯‘𝑃) − 1)) ↦ (◡(iEdg‘𝐺)‘{(𝑃‘𝑥), (𝑃‘(𝑥 + 1))}))))((iEdg‘𝐺)‘((𝑥 ∈ (0..^((♯‘𝑃) − 1)) ↦ (◡(iEdg‘𝐺)‘{(𝑃‘𝑥), (𝑃‘(𝑥 + 1))}))‘𝑖)) = {(𝑃‘𝑖), (𝑃‘(𝑖 + 1))}))))
34	33	adantl 475	. . . . . . . . . . . . . . 15 ⊢ ((((𝑃 ≠ ∅ ∧ 𝑃 ∈ Word (Vtx‘𝐺)) ∧ ((𝐺 ∈ V ∧ 𝑃 ∈ Word (Vtx‘𝐺)) ∧ 𝐺 ∈ USPGraph)) ∧ 𝑓 = (𝑥 ∈ (0..^((♯‘𝑃) − 1)) ↦ (◡(iEdg‘𝐺)‘{(𝑃‘𝑥), (𝑃‘(𝑥 + 1))}))) → ((∀𝑖 ∈ (0..^((♯‘𝑃) − 1)){(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ (Edg‘𝐺) → (𝑓 ∈ Word dom (iEdg‘𝐺) ∧ 𝑃:(0...(♯‘𝑓))⟶(Vtx‘𝐺) ∧ ∀𝑖 ∈ (0..^(♯‘𝑓))((iEdg‘𝐺)‘(𝑓‘𝑖)) = {(𝑃‘𝑖), (𝑃‘(𝑖 + 1))})) ↔ (∀𝑖 ∈ (0..^((♯‘𝑃) − 1)){(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ (Edg‘𝐺) → ((𝑥 ∈ (0..^((♯‘𝑃) − 1)) ↦ (◡(iEdg‘𝐺)‘{(𝑃‘𝑥), (𝑃‘(𝑥 + 1))})) ∈ Word dom (iEdg‘𝐺) ∧ 𝑃:(0...(♯‘(𝑥 ∈ (0..^((♯‘𝑃) − 1)) ↦ (◡(iEdg‘𝐺)‘{(𝑃‘𝑥), (𝑃‘(𝑥 + 1))}))))⟶(Vtx‘𝐺) ∧ ∀𝑖 ∈ (0..^(♯‘(𝑥 ∈ (0..^((♯‘𝑃) − 1)) ↦ (◡(iEdg‘𝐺)‘{(𝑃‘𝑥), (𝑃‘(𝑥 + 1))}))))((iEdg‘𝐺)‘((𝑥 ∈ (0..^((♯‘𝑃) − 1)) ↦ (◡(iEdg‘𝐺)‘{(𝑃‘𝑥), (𝑃‘(𝑥 + 1))}))‘𝑖)) = {(𝑃‘𝑖), (𝑃‘(𝑖 + 1))}))))
35	23, 34	mpbird 249	. . . . . . . . . . . . . 14 ⊢ ((((𝑃 ≠ ∅ ∧ 𝑃 ∈ Word (Vtx‘𝐺)) ∧ ((𝐺 ∈ V ∧ 𝑃 ∈ Word (Vtx‘𝐺)) ∧ 𝐺 ∈ USPGraph)) ∧ 𝑓 = (𝑥 ∈ (0..^((♯‘𝑃) − 1)) ↦ (◡(iEdg‘𝐺)‘{(𝑃‘𝑥), (𝑃‘(𝑥 + 1))}))) → (∀𝑖 ∈ (0..^((♯‘𝑃) − 1)){(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ (Edg‘𝐺) → (𝑓 ∈ Word dom (iEdg‘𝐺) ∧ 𝑃:(0...(♯‘𝑓))⟶(Vtx‘𝐺) ∧ ∀𝑖 ∈ (0..^(♯‘𝑓))((iEdg‘𝐺)‘(𝑓‘𝑖)) = {(𝑃‘𝑖), (𝑃‘(𝑖 + 1))})))
36	7, 35	spcimedv 3509	. . . . . . . . . . . . 13 ⊢ (((𝑃 ≠ ∅ ∧ 𝑃 ∈ Word (Vtx‘𝐺)) ∧ ((𝐺 ∈ V ∧ 𝑃 ∈ Word (Vtx‘𝐺)) ∧ 𝐺 ∈ USPGraph)) → (∀𝑖 ∈ (0..^((♯‘𝑃) − 1)){(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ (Edg‘𝐺) → ∃𝑓(𝑓 ∈ Word dom (iEdg‘𝐺) ∧ 𝑃:(0...(♯‘𝑓))⟶(Vtx‘𝐺) ∧ ∀𝑖 ∈ (0..^(♯‘𝑓))((iEdg‘𝐺)‘(𝑓‘𝑖)) = {(𝑃‘𝑖), (𝑃‘(𝑖 + 1))})))
37	36	ex 403	. . . . . . . . . . . 12 ⊢ ((𝑃 ≠ ∅ ∧ 𝑃 ∈ Word (Vtx‘𝐺)) → (((𝐺 ∈ V ∧ 𝑃 ∈ Word (Vtx‘𝐺)) ∧ 𝐺 ∈ USPGraph) → (∀𝑖 ∈ (0..^((♯‘𝑃) − 1)){(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ (Edg‘𝐺) → ∃𝑓(𝑓 ∈ Word dom (iEdg‘𝐺) ∧ 𝑃:(0...(♯‘𝑓))⟶(Vtx‘𝐺) ∧ ∀𝑖 ∈ (0..^(♯‘𝑓))((iEdg‘𝐺)‘(𝑓‘𝑖)) = {(𝑃‘𝑖), (𝑃‘(𝑖 + 1))}))))
38	37	com23 86	. . . . . . . . . . 11 ⊢ ((𝑃 ≠ ∅ ∧ 𝑃 ∈ Word (Vtx‘𝐺)) → (∀𝑖 ∈ (0..^((♯‘𝑃) − 1)){(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ (Edg‘𝐺) → (((𝐺 ∈ V ∧ 𝑃 ∈ Word (Vtx‘𝐺)) ∧ 𝐺 ∈ USPGraph) → ∃𝑓(𝑓 ∈ Word dom (iEdg‘𝐺) ∧ 𝑃:(0...(♯‘𝑓))⟶(Vtx‘𝐺) ∧ ∀𝑖 ∈ (0..^(♯‘𝑓))((iEdg‘𝐺)‘(𝑓‘𝑖)) = {(𝑃‘𝑖), (𝑃‘(𝑖 + 1))}))))
39	38	3impia 1149	. . . . . . . . . 10 ⊢ ((𝑃 ≠ ∅ ∧ 𝑃 ∈ Word (Vtx‘𝐺) ∧ ∀𝑖 ∈ (0..^((♯‘𝑃) − 1)){(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ (Edg‘𝐺)) → (((𝐺 ∈ V ∧ 𝑃 ∈ Word (Vtx‘𝐺)) ∧ 𝐺 ∈ USPGraph) → ∃𝑓(𝑓 ∈ Word dom (iEdg‘𝐺) ∧ 𝑃:(0...(♯‘𝑓))⟶(Vtx‘𝐺) ∧ ∀𝑖 ∈ (0..^(♯‘𝑓))((iEdg‘𝐺)‘(𝑓‘𝑖)) = {(𝑃‘𝑖), (𝑃‘(𝑖 + 1))})))
40	39	expd 406	. . . . . . . . 9 ⊢ ((𝑃 ≠ ∅ ∧ 𝑃 ∈ Word (Vtx‘𝐺) ∧ ∀𝑖 ∈ (0..^((♯‘𝑃) − 1)){(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ (Edg‘𝐺)) → ((𝐺 ∈ V ∧ 𝑃 ∈ Word (Vtx‘𝐺)) → (𝐺 ∈ USPGraph → ∃𝑓(𝑓 ∈ Word dom (iEdg‘𝐺) ∧ 𝑃:(0...(♯‘𝑓))⟶(Vtx‘𝐺) ∧ ∀𝑖 ∈ (0..^(♯‘𝑓))((iEdg‘𝐺)‘(𝑓‘𝑖)) = {(𝑃‘𝑖), (𝑃‘(𝑖 + 1))}))))
41	40	impcom 398	. . . . . . . 8 ⊢ (((𝐺 ∈ V ∧ 𝑃 ∈ Word (Vtx‘𝐺)) ∧ (𝑃 ≠ ∅ ∧ 𝑃 ∈ Word (Vtx‘𝐺) ∧ ∀𝑖 ∈ (0..^((♯‘𝑃) − 1)){(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ (Edg‘𝐺))) → (𝐺 ∈ USPGraph → ∃𝑓(𝑓 ∈ Word dom (iEdg‘𝐺) ∧ 𝑃:(0...(♯‘𝑓))⟶(Vtx‘𝐺) ∧ ∀𝑖 ∈ (0..^(♯‘𝑓))((iEdg‘𝐺)‘(𝑓‘𝑖)) = {(𝑃‘𝑖), (𝑃‘(𝑖 + 1))})))
42	41	imp 397	. . . . . . 7 ⊢ ((((𝐺 ∈ V ∧ 𝑃 ∈ Word (Vtx‘𝐺)) ∧ (𝑃 ≠ ∅ ∧ 𝑃 ∈ Word (Vtx‘𝐺) ∧ ∀𝑖 ∈ (0..^((♯‘𝑃) − 1)){(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ (Edg‘𝐺))) ∧ 𝐺 ∈ USPGraph) → ∃𝑓(𝑓 ∈ Word dom (iEdg‘𝐺) ∧ 𝑃:(0...(♯‘𝑓))⟶(Vtx‘𝐺) ∧ ∀𝑖 ∈ (0..^(♯‘𝑓))((iEdg‘𝐺)‘(𝑓‘𝑖)) = {(𝑃‘𝑖), (𝑃‘(𝑖 + 1))}))
43		uspgrupgr 26482	. . . . . . . . . 10 ⊢ (𝐺 ∈ USPGraph → 𝐺 ∈ UPGraph)
44	1, 21	upgriswlk 26945	. . . . . . . . . 10 ⊢ (𝐺 ∈ UPGraph → (𝑓(Walks‘𝐺)𝑃 ↔ (𝑓 ∈ Word dom (iEdg‘𝐺) ∧ 𝑃:(0...(♯‘𝑓))⟶(Vtx‘𝐺) ∧ ∀𝑖 ∈ (0..^(♯‘𝑓))((iEdg‘𝐺)‘(𝑓‘𝑖)) = {(𝑃‘𝑖), (𝑃‘(𝑖 + 1))})))
45	43, 44	syl 17	. . . . . . . . 9 ⊢ (𝐺 ∈ USPGraph → (𝑓(Walks‘𝐺)𝑃 ↔ (𝑓 ∈ Word dom (iEdg‘𝐺) ∧ 𝑃:(0...(♯‘𝑓))⟶(Vtx‘𝐺) ∧ ∀𝑖 ∈ (0..^(♯‘𝑓))((iEdg‘𝐺)‘(𝑓‘𝑖)) = {(𝑃‘𝑖), (𝑃‘(𝑖 + 1))})))
46	45	adantl 475	. . . . . . . 8 ⊢ ((((𝐺 ∈ V ∧ 𝑃 ∈ Word (Vtx‘𝐺)) ∧ (𝑃 ≠ ∅ ∧ 𝑃 ∈ Word (Vtx‘𝐺) ∧ ∀𝑖 ∈ (0..^((♯‘𝑃) − 1)){(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ (Edg‘𝐺))) ∧ 𝐺 ∈ USPGraph) → (𝑓(Walks‘𝐺)𝑃 ↔ (𝑓 ∈ Word dom (iEdg‘𝐺) ∧ 𝑃:(0...(♯‘𝑓))⟶(Vtx‘𝐺) ∧ ∀𝑖 ∈ (0..^(♯‘𝑓))((iEdg‘𝐺)‘(𝑓‘𝑖)) = {(𝑃‘𝑖), (𝑃‘(𝑖 + 1))})))
47	46	exbidv 2020	. . . . . . 7 ⊢ ((((𝐺 ∈ V ∧ 𝑃 ∈ Word (Vtx‘𝐺)) ∧ (𝑃 ≠ ∅ ∧ 𝑃 ∈ Word (Vtx‘𝐺) ∧ ∀𝑖 ∈ (0..^((♯‘𝑃) − 1)){(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ (Edg‘𝐺))) ∧ 𝐺 ∈ USPGraph) → (∃𝑓 𝑓(Walks‘𝐺)𝑃 ↔ ∃𝑓(𝑓 ∈ Word dom (iEdg‘𝐺) ∧ 𝑃:(0...(♯‘𝑓))⟶(Vtx‘𝐺) ∧ ∀𝑖 ∈ (0..^(♯‘𝑓))((iEdg‘𝐺)‘(𝑓‘𝑖)) = {(𝑃‘𝑖), (𝑃‘(𝑖 + 1))})))
48	42, 47	mpbird 249	. . . . . 6 ⊢ ((((𝐺 ∈ V ∧ 𝑃 ∈ Word (Vtx‘𝐺)) ∧ (𝑃 ≠ ∅ ∧ 𝑃 ∈ Word (Vtx‘𝐺) ∧ ∀𝑖 ∈ (0..^((♯‘𝑃) − 1)){(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ (Edg‘𝐺))) ∧ 𝐺 ∈ USPGraph) → ∃𝑓 𝑓(Walks‘𝐺)𝑃)
49	48	ex 403	. . . . 5 ⊢ (((𝐺 ∈ V ∧ 𝑃 ∈ Word (Vtx‘𝐺)) ∧ (𝑃 ≠ ∅ ∧ 𝑃 ∈ Word (Vtx‘𝐺) ∧ ∀𝑖 ∈ (0..^((♯‘𝑃) − 1)){(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ (Edg‘𝐺))) → (𝐺 ∈ USPGraph → ∃𝑓 𝑓(Walks‘𝐺)𝑃))
50	49	ex 403	. . . 4 ⊢ ((𝐺 ∈ V ∧ 𝑃 ∈ Word (Vtx‘𝐺)) → ((𝑃 ≠ ∅ ∧ 𝑃 ∈ Word (Vtx‘𝐺) ∧ ∀𝑖 ∈ (0..^((♯‘𝑃) − 1)){(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ (Edg‘𝐺)) → (𝐺 ∈ USPGraph → ∃𝑓 𝑓(Walks‘𝐺)𝑃)))
51	4, 50	syl5bi 234	. . 3 ⊢ ((𝐺 ∈ V ∧ 𝑃 ∈ Word (Vtx‘𝐺)) → (𝑃 ∈ (WWalks‘𝐺) → (𝐺 ∈ USPGraph → ∃𝑓 𝑓(Walks‘𝐺)𝑃)))
52	2, 51	mpcom 38	. 2 ⊢ (𝑃 ∈ (WWalks‘𝐺) → (𝐺 ∈ USPGraph → ∃𝑓 𝑓(Walks‘𝐺)𝑃))
53	52	com12 32	1 ⊢ (𝐺 ∈ USPGraph → (𝑃 ∈ (WWalks‘𝐺) → ∃𝑓 𝑓(Walks‘𝐺)𝑃))

Syntax hints:   → wi 4   ↔ wb 198   ∧ wa 386   ∧ w3a 1111   = wceq 1656  ∃wex 1878   ∈ wcel 2164   ≠ wne 2999  ∀wral 3117  Vcvv 3414  ∅c0 4146  {cpr 4401   class class class wbr 4875   ↦ cmpt 4954  ^◡ccnv 5345  dom cdm 5346  ran crn 5347  ⟶wf 6123  ‘cfv 6127  (class class class)co 6910  0cc0 10259  1c1 10260   + caddc 10262   ≤ cle 10399   − cmin 10592  ...cfz 12626  ..^cfzo 12767  ♯chash 13417  Word cword 13581  Vtxcvtx 26301  iEdgciedg 26302  Edgcedg 26352  UPGraphcupgr 26385  USPGraphcuspgr 26454  Walkscwlks 26901  WWalkscwwlks 27131

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1894  ax-4 1908  ax-5 2009  ax-6 2075  ax-7 2112  ax-8 2166  ax-9 2173  ax-10 2192  ax-11 2207  ax-12 2220  ax-13 2389  ax-ext 2803  ax-rep 4996  ax-sep 5007  ax-nul 5015  ax-pow 5067  ax-pr 5129  ax-un 7214  ax-cnex 10315  ax-resscn 10316  ax-1cn 10317  ax-icn 10318  ax-addcl 10319  ax-addrcl 10320  ax-mulcl 10321  ax-mulrcl 10322  ax-mulcom 10323  ax-addass 10324  ax-mulass 10325  ax-distr 10326  ax-i2m1 10327  ax-1ne0 10328  ax-1rid 10329  ax-rnegex 10330  ax-rrecex 10331  ax-cnre 10332  ax-pre-lttri 10333  ax-pre-lttrn 10334  ax-pre-ltadd 10335  ax-pre-mulgt0 10336

This theorem depends on definitions:  df-bi 199  df-an 387  df-or 879  df-ifp 1090  df-3or 1112  df-3an 1113  df-tru 1660  df-ex 1879  df-nf 1883  df-sb 2068  df-mo 2605  df-eu 2640  df-clab 2812  df-cleq 2818  df-clel 2821  df-nfc 2958  df-ne 3000  df-nel 3103  df-ral 3122  df-rex 3123  df-reu 3124  df-rmo 3125  df-rab 3126  df-v 3416  df-sbc 3663  df-csb 3758  df-dif 3801  df-un 3803  df-in 3805  df-ss 3812  df-pss 3814  df-nul 4147  df-if 4309  df-pw 4382  df-sn 4400  df-pr 4402  df-tp 4404  df-op 4406  df-uni 4661  df-int 4700  df-iun 4744  df-br 4876  df-opab 4938  df-mpt 4955  df-tr 4978  df-id 5252  df-eprel 5257  df-po 5265  df-so 5266  df-fr 5305  df-we 5307  df-xp 5352  df-rel 5353  df-cnv 5354  df-co 5355  df-dm 5356  df-rn 5357  df-res 5358  df-ima 5359  df-pred 5924  df-ord 5970  df-on 5971  df-lim 5972  df-suc 5973  df-iota 6090  df-fun 6129  df-fn 6130  df-f 6131  df-f1 6132  df-fo 6133  df-f1o 6134  df-fv 6135  df-riota 6871  df-ov 6913  df-oprab 6914  df-mpt2 6915  df-om 7332  df-1st 7433  df-2nd 7434  df-wrecs 7677  df-recs 7739  df-rdg 7777  df-1o 7831  df-2o 7832  df-oadd 7835  df-er 8014  df-map 8129  df-pm 8130  df-en 8229  df-dom 8230  df-sdom 8231  df-fin 8232  df-card 9085  df-cda 9312  df-pnf 10400  df-mnf 10401  df-xr 10402  df-ltxr 10403  df-le 10404  df-sub 10594  df-neg 10595  df-nn 11358  df-2 11421  df-n0 11626  df-xnn0 11698  df-z 11712  df-uz 11976  df-fz 12627  df-fzo 12768  df-hash 13418  df-word 13582  df-edg 26353  df-uhgr 26363  df-upgr 26387  df-uspgr 26456  df-wlks 26904  df-wwlks 27136

This theorem is referenced by:  wlkiswwlks  27182  wlklnwwlkln2  27190