Theorem wlkiswwlks2 28141

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 2738	. . . 4 ⊢ (Vtx‘𝐺) = (Vtx‘𝐺)
2	1	wwlkbp 28107	. . 3 ⊢ (𝑃 ∈ (WWalks‘𝐺) → (𝐺 ∈ V ∧ 𝑃 ∈ Word (Vtx‘𝐺)))
3		eqid 2738	. . . . 5 ⊢ (Edg‘𝐺) = (Edg‘𝐺)
4	1, 3	iswwlks 28102	. . . 4 ⊢ (𝑃 ∈ (WWalks‘𝐺) ↔ (𝑃 ≠ ∅ ∧ 𝑃 ∈ Word (Vtx‘𝐺) ∧ ∀𝑖 ∈ (0..^((♯‘𝑃) − 1)){(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ (Edg‘𝐺)))
5		ovex 7288	. . . . . . . . . . . . . . 15 ⊢ (0..^((♯‘𝑃) − 1)) ∈ V
6		mptexg 7079	. . . . . . . . . . . . . . 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 769	. . . . . . . . . . . . . . . . . 18 ⊢ (((𝑃 ≠ ∅ ∧ 𝑃 ∈ Word (Vtx‘𝐺)) ∧ ((𝐺 ∈ V ∧ 𝑃 ∈ Word (Vtx‘𝐺)) ∧ 𝐺 ∈ USPGraph)) → 𝐺 ∈ USPGraph)
9		simplr 765	. . . . . . . . . . . . . . . . . 18 ⊢ (((𝑃 ≠ ∅ ∧ 𝑃 ∈ Word (Vtx‘𝐺)) ∧ ((𝐺 ∈ V ∧ 𝑃 ∈ Word (Vtx‘𝐺)) ∧ 𝐺 ∈ USPGraph)) → 𝑃 ∈ Word (Vtx‘𝐺))
10		hashge1 14032	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((𝑃 ∈ Word (Vtx‘𝐺) ∧ 𝑃 ≠ ∅) → 1 ≤ (♯‘𝑃))
11	10	ancoms 458	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝑃 ≠ ∅ ∧ 𝑃 ∈ Word (Vtx‘𝐺)) → 1 ≤ (♯‘𝑃))
12	11	adantr 480	. . . . . . . . . . . . . . . . . 18 ⊢ (((𝑃 ≠ ∅ ∧ 𝑃 ∈ Word (Vtx‘𝐺)) ∧ ((𝐺 ∈ V ∧ 𝑃 ∈ Word (Vtx‘𝐺)) ∧ 𝐺 ∈ USPGraph)) → 1 ≤ (♯‘𝑃))
13	8, 9, 12	3jca 1126	. . . . . . . . . . . . . . . . 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 480	. . . . . . . . . . . . . . . 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 27322	. . . . . . . . . . . . . . . . . . . 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 2824	. . . . . . . . . . . . . . . . . 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 3120	. . . . . . . . . . . . . . . . 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 228	. . . . . . . . . . . . . . . 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 2738	. . . . . . . . . . . . . . . . 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 2738	. . . . . . . . . . . . . . . . 17 ⊢ (iEdg‘𝐺) = (iEdg‘𝐺)
22	20, 21	wlkiswwlks2lem6 28140	. . . . . . . . . . . . . . . 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 2826	. . . . . . . . . . . . . . . . . 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 6756	. . . . . . . . . . . . . . . . . . . 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 7271	. . . . . . . . . . . . . . . . . . 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 6570	. . . . . . . . . . . . . . . . . 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 7271	. . . . . . . . . . . . . . . . . . 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 6755	. . . . . . . . . . . . . . . . . . . 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 6764	. . . . . . . . . . . . . . . . . . 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 3327	. . . . . . . . . . . . . . . . . 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 1434	. . . . . . . . . . . . . . . . 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 340	. . . . . . . . . . . . . . . 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 481	. . . . . . . . . . . . . . 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 256	. . . . . . . . . . . . . 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 3524	. . . . . . . . . . . . 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 412	. . . . . . . . . . . 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 1115	. . . . . . . . . 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 415	. . . . . . . . 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 407	. . . . . . . 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 406	. . . . . . 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 27449	. . . . . . . . . 10 ⊢ (𝐺 ∈ USPGraph → 𝐺 ∈ UPGraph)
44	1, 21	upgriswlk 27910	. . . . . . . . . 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 481	. . . . . . . 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 1925	. . . . . . 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 256	. . . . . 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 412	. . . . 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 412	. . . 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 241	. . 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 205   ∧ wa 395   ∧ w3a 1085   = wceq 1539  ∃wex 1783   ∈ wcel 2108   ≠ wne 2942  ∀wral 3063  Vcvv 3422  ∅c0 4253  {cpr 4560   class class class wbr 5070   ↦ cmpt 5153  ^◡ccnv 5579  dom cdm 5580  ran crn 5581  ⟶wf 6414  ‘cfv 6418  (class class class)co 7255  0cc0 10802  1c1 10803   + caddc 10805   ≤ cle 10941   − cmin 11135  ...cfz 13168  ..^cfzo 13311  ♯chash 13972  Word cword 14145  Vtxcvtx 27269  iEdgciedg 27270  Edgcedg 27320  UPGraphcupgr 27353  USPGraphcuspgr 27421  Walkscwlks 27866  WWalkscwwlks 28091

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1799  ax-4 1813  ax-5 1914  ax-6 1972  ax-7 2012  ax-8 2110  ax-9 2118  ax-10 2139  ax-11 2156  ax-12 2173  ax-ext 2709  ax-rep 5205  ax-sep 5218  ax-nul 5225  ax-pow 5283  ax-pr 5347  ax-un 7566  ax-cnex 10858  ax-resscn 10859  ax-1cn 10860  ax-icn 10861  ax-addcl 10862  ax-addrcl 10863  ax-mulcl 10864  ax-mulrcl 10865  ax-mulcom 10866  ax-addass 10867  ax-mulass 10868  ax-distr 10869  ax-i2m1 10870  ax-1ne0 10871  ax-1rid 10872  ax-rnegex 10873  ax-rrecex 10874  ax-cnre 10875  ax-pre-lttri 10876  ax-pre-lttrn 10877  ax-pre-ltadd 10878  ax-pre-mulgt0 10879

This theorem depends on definitions:  df-bi 206  df-an 396  df-or 844  df-ifp 1060  df-3or 1086  df-3an 1087  df-tru 1542  df-fal 1552  df-ex 1784  df-nf 1788  df-sb 2069  df-mo 2540  df-eu 2569  df-clab 2716  df-cleq 2730  df-clel 2817  df-nfc 2888  df-ne 2943  df-nel 3049  df-ral 3068  df-rex 3069  df-reu 3070  df-rab 3072  df-v 3424  df-sbc 3712  df-csb 3829  df-dif 3886  df-un 3888  df-in 3890  df-ss 3900  df-pss 3902  df-nul 4254  df-if 4457  df-pw 4532  df-sn 4559  df-pr 4561  df-tp 4563  df-op 4565  df-uni 4837  df-int 4877  df-iun 4923  df-br 5071  df-opab 5133  df-mpt 5154  df-tr 5188  df-id 5480  df-eprel 5486  df-po 5494  df-so 5495  df-fr 5535  df-we 5537  df-xp 5586  df-rel 5587  df-cnv 5588  df-co 5589  df-dm 5590  df-rn 5591  df-res 5592  df-ima 5593  df-pred 6191  df-ord 6254  df-on 6255  df-lim 6256  df-suc 6257  df-iota 6376  df-fun 6420  df-fn 6421  df-f 6422  df-f1 6423  df-fo 6424  df-f1o 6425  df-fv 6426  df-riota 7212  df-ov 7258  df-oprab 7259  df-mpo 7260  df-om 7688  df-1st 7804  df-2nd 7805  df-frecs 8068  df-wrecs 8099  df-recs 8173  df-rdg 8212  df-1o 8267  df-2o 8268  df-oadd 8271  df-er 8456  df-map 8575  df-pm 8576  df-en 8692  df-dom 8693  df-sdom 8694  df-fin 8695  df-dju 9590  df-card 9628  df-pnf 10942  df-mnf 10943  df-xr 10944  df-ltxr 10945  df-le 10946  df-sub 11137  df-neg 11138  df-nn 11904  df-2 11966  df-n0 12164  df-xnn0 12236  df-z 12250  df-uz 12512  df-fz 13169  df-fzo 13312  df-hash 13973  df-word 14146  df-edg 27321  df-uhgr 27331  df-upgr 27355  df-uspgr 27423  df-wlks 27869  df-wwlks 28096

This theorem is referenced by:  wlkiswwlks  28142  wlklnwwlkln2  28149