Mathbox for Alexander van der Vekens < Previous   Next > Nearby theorems Mirrors  >  Home  >  MPE Home  >  Th. List  >   Mathboxes  >  upgrewlkle2 Structured version   Visualization version   GIF version

Theorem upgrewlkle2 40808
 Description: In a pseudograph, there is no s-walk of edges of length greater than 1 with s>2. (Contributed by AV, 4-Jan-2021.)
Assertion
Ref Expression
upgrewlkle2 ((𝐺 ∈ UPGraph ∧ 𝐹 ∈ (𝐺 EdgWalks 𝑆) ∧ 1 < (#‘𝐹)) → 𝑆 ≤ 2)

Proof of Theorem upgrewlkle2
Dummy variable 𝑘 is distinct from all other variables.
StepHypRef Expression
1 eqid 2610 . . . 4 (iEdg‘𝐺) = (iEdg‘𝐺)
21ewlkprop 40805 . . 3 (𝐹 ∈ (𝐺 EdgWalks 𝑆) → ((𝐺 ∈ V ∧ 𝑆 ∈ ℕ0*) ∧ 𝐹 ∈ Word dom (iEdg‘𝐺) ∧ ∀𝑘 ∈ (1..^(#‘𝐹))𝑆 ≤ (#‘(((iEdg‘𝐺)‘(𝐹‘(𝑘 − 1))) ∩ ((iEdg‘𝐺)‘(𝐹𝑘))))))
3 fvex 6113 . . . . . . . . . . 11 ((iEdg‘𝐺)‘(𝐹‘(𝑘 − 1))) ∈ V
4 hashin 13060 . . . . . . . . . . 11 (((iEdg‘𝐺)‘(𝐹‘(𝑘 − 1))) ∈ V → (#‘(((iEdg‘𝐺)‘(𝐹‘(𝑘 − 1))) ∩ ((iEdg‘𝐺)‘(𝐹𝑘)))) ≤ (#‘((iEdg‘𝐺)‘(𝐹‘(𝑘 − 1)))))
53, 4ax-mp 5 . . . . . . . . . 10 (#‘(((iEdg‘𝐺)‘(𝐹‘(𝑘 − 1))) ∩ ((iEdg‘𝐺)‘(𝐹𝑘)))) ≤ (#‘((iEdg‘𝐺)‘(𝐹‘(𝑘 − 1))))
6 simpl3 1059 . . . . . . . . . . . 12 ((((𝐺 ∈ V ∧ 𝑆 ∈ ℕ0*) ∧ 𝐹 ∈ Word dom (iEdg‘𝐺) ∧ 𝐺 ∈ UPGraph ) ∧ 𝑘 ∈ (1..^(#‘𝐹))) → 𝐺 ∈ UPGraph )
7 upgruhgr 25768 . . . . . . . . . . . . . . . 16 (𝐺 ∈ UPGraph → 𝐺 ∈ UHGraph )
81uhgrfun 25732 . . . . . . . . . . . . . . . 16 (𝐺 ∈ UHGraph → Fun (iEdg‘𝐺))
97, 8syl 17 . . . . . . . . . . . . . . 15 (𝐺 ∈ UPGraph → Fun (iEdg‘𝐺))
10 funfn 5833 . . . . . . . . . . . . . . 15 (Fun (iEdg‘𝐺) ↔ (iEdg‘𝐺) Fn dom (iEdg‘𝐺))
119, 10sylib 207 . . . . . . . . . . . . . 14 (𝐺 ∈ UPGraph → (iEdg‘𝐺) Fn dom (iEdg‘𝐺))
12113ad2ant3 1077 . . . . . . . . . . . . 13 (((𝐺 ∈ V ∧ 𝑆 ∈ ℕ0*) ∧ 𝐹 ∈ Word dom (iEdg‘𝐺) ∧ 𝐺 ∈ UPGraph ) → (iEdg‘𝐺) Fn dom (iEdg‘𝐺))
1312adantr 480 . . . . . . . . . . . 12 ((((𝐺 ∈ V ∧ 𝑆 ∈ ℕ0*) ∧ 𝐹 ∈ Word dom (iEdg‘𝐺) ∧ 𝐺 ∈ UPGraph ) ∧ 𝑘 ∈ (1..^(#‘𝐹))) → (iEdg‘𝐺) Fn dom (iEdg‘𝐺))
14 simpl 472 . . . . . . . . . . . . . . 15 ((𝐹 ∈ Word dom (iEdg‘𝐺) ∧ 𝑘 ∈ (1..^(#‘𝐹))) → 𝐹 ∈ Word dom (iEdg‘𝐺))
15 elfzofz 12354 . . . . . . . . . . . . . . . . 17 (𝑘 ∈ (1..^(#‘𝐹)) → 𝑘 ∈ (1...(#‘𝐹)))
16 fz1fzo0m1 12383 . . . . . . . . . . . . . . . . 17 (𝑘 ∈ (1...(#‘𝐹)) → (𝑘 − 1) ∈ (0..^(#‘𝐹)))
1715, 16syl 17 . . . . . . . . . . . . . . . 16 (𝑘 ∈ (1..^(#‘𝐹)) → (𝑘 − 1) ∈ (0..^(#‘𝐹)))
1817adantl 481 . . . . . . . . . . . . . . 15 ((𝐹 ∈ Word dom (iEdg‘𝐺) ∧ 𝑘 ∈ (1..^(#‘𝐹))) → (𝑘 − 1) ∈ (0..^(#‘𝐹)))
1914, 18jca 553 . . . . . . . . . . . . . 14 ((𝐹 ∈ Word dom (iEdg‘𝐺) ∧ 𝑘 ∈ (1..^(#‘𝐹))) → (𝐹 ∈ Word dom (iEdg‘𝐺) ∧ (𝑘 − 1) ∈ (0..^(#‘𝐹))))
20 wrdsymbcl 13173 . . . . . . . . . . . . . 14 ((𝐹 ∈ Word dom (iEdg‘𝐺) ∧ (𝑘 − 1) ∈ (0..^(#‘𝐹))) → (𝐹‘(𝑘 − 1)) ∈ dom (iEdg‘𝐺))
2119, 20syl 17 . . . . . . . . . . . . 13 ((𝐹 ∈ Word dom (iEdg‘𝐺) ∧ 𝑘 ∈ (1..^(#‘𝐹))) → (𝐹‘(𝑘 − 1)) ∈ dom (iEdg‘𝐺))
22213ad2antl2 1217 . . . . . . . . . . . 12 ((((𝐺 ∈ V ∧ 𝑆 ∈ ℕ0*) ∧ 𝐹 ∈ Word dom (iEdg‘𝐺) ∧ 𝐺 ∈ UPGraph ) ∧ 𝑘 ∈ (1..^(#‘𝐹))) → (𝐹‘(𝑘 − 1)) ∈ dom (iEdg‘𝐺))
23 eqid 2610 . . . . . . . . . . . . 13 (Vtx‘𝐺) = (Vtx‘𝐺)
2423, 1upgrle 25757 . . . . . . . . . . . 12 ((𝐺 ∈ UPGraph ∧ (iEdg‘𝐺) Fn dom (iEdg‘𝐺) ∧ (𝐹‘(𝑘 − 1)) ∈ dom (iEdg‘𝐺)) → (#‘((iEdg‘𝐺)‘(𝐹‘(𝑘 − 1)))) ≤ 2)
256, 13, 22, 24syl3anc 1318 . . . . . . . . . . 11 ((((𝐺 ∈ V ∧ 𝑆 ∈ ℕ0*) ∧ 𝐹 ∈ Word dom (iEdg‘𝐺) ∧ 𝐺 ∈ UPGraph ) ∧ 𝑘 ∈ (1..^(#‘𝐹))) → (#‘((iEdg‘𝐺)‘(𝐹‘(𝑘 − 1)))) ≤ 2)
263inex1 4727 . . . . . . . . . . . . . . 15 (((iEdg‘𝐺)‘(𝐹‘(𝑘 − 1))) ∩ ((iEdg‘𝐺)‘(𝐹𝑘))) ∈ V
27 hashxrcl 13010 . . . . . . . . . . . . . . 15 ((((iEdg‘𝐺)‘(𝐹‘(𝑘 − 1))) ∩ ((iEdg‘𝐺)‘(𝐹𝑘))) ∈ V → (#‘(((iEdg‘𝐺)‘(𝐹‘(𝑘 − 1))) ∩ ((iEdg‘𝐺)‘(𝐹𝑘)))) ∈ ℝ*)
2826, 27ax-mp 5 . . . . . . . . . . . . . 14 (#‘(((iEdg‘𝐺)‘(𝐹‘(𝑘 − 1))) ∩ ((iEdg‘𝐺)‘(𝐹𝑘)))) ∈ ℝ*
29 hashxrcl 13010 . . . . . . . . . . . . . . 15 (((iEdg‘𝐺)‘(𝐹‘(𝑘 − 1))) ∈ V → (#‘((iEdg‘𝐺)‘(𝐹‘(𝑘 − 1)))) ∈ ℝ*)
303, 29ax-mp 5 . . . . . . . . . . . . . 14 (#‘((iEdg‘𝐺)‘(𝐹‘(𝑘 − 1)))) ∈ ℝ*
31 2re 10967 . . . . . . . . . . . . . . 15 2 ∈ ℝ
3231rexri 9976 . . . . . . . . . . . . . 14 2 ∈ ℝ*
3328, 30, 323pm3.2i 1232 . . . . . . . . . . . . 13 ((#‘(((iEdg‘𝐺)‘(𝐹‘(𝑘 − 1))) ∩ ((iEdg‘𝐺)‘(𝐹𝑘)))) ∈ ℝ* ∧ (#‘((iEdg‘𝐺)‘(𝐹‘(𝑘 − 1)))) ∈ ℝ* ∧ 2 ∈ ℝ*)
3433a1i 11 . . . . . . . . . . . 12 ((((𝐺 ∈ V ∧ 𝑆 ∈ ℕ0*) ∧ 𝐹 ∈ Word dom (iEdg‘𝐺) ∧ 𝐺 ∈ UPGraph ) ∧ 𝑘 ∈ (1..^(#‘𝐹))) → ((#‘(((iEdg‘𝐺)‘(𝐹‘(𝑘 − 1))) ∩ ((iEdg‘𝐺)‘(𝐹𝑘)))) ∈ ℝ* ∧ (#‘((iEdg‘𝐺)‘(𝐹‘(𝑘 − 1)))) ∈ ℝ* ∧ 2 ∈ ℝ*))
35 xrletr 11865 . . . . . . . . . . . 12 (((#‘(((iEdg‘𝐺)‘(𝐹‘(𝑘 − 1))) ∩ ((iEdg‘𝐺)‘(𝐹𝑘)))) ∈ ℝ* ∧ (#‘((iEdg‘𝐺)‘(𝐹‘(𝑘 − 1)))) ∈ ℝ* ∧ 2 ∈ ℝ*) → (((#‘(((iEdg‘𝐺)‘(𝐹‘(𝑘 − 1))) ∩ ((iEdg‘𝐺)‘(𝐹𝑘)))) ≤ (#‘((iEdg‘𝐺)‘(𝐹‘(𝑘 − 1)))) ∧ (#‘((iEdg‘𝐺)‘(𝐹‘(𝑘 − 1)))) ≤ 2) → (#‘(((iEdg‘𝐺)‘(𝐹‘(𝑘 − 1))) ∩ ((iEdg‘𝐺)‘(𝐹𝑘)))) ≤ 2))
3634, 35syl 17 . . . . . . . . . . 11 ((((𝐺 ∈ V ∧ 𝑆 ∈ ℕ0*) ∧ 𝐹 ∈ Word dom (iEdg‘𝐺) ∧ 𝐺 ∈ UPGraph ) ∧ 𝑘 ∈ (1..^(#‘𝐹))) → (((#‘(((iEdg‘𝐺)‘(𝐹‘(𝑘 − 1))) ∩ ((iEdg‘𝐺)‘(𝐹𝑘)))) ≤ (#‘((iEdg‘𝐺)‘(𝐹‘(𝑘 − 1)))) ∧ (#‘((iEdg‘𝐺)‘(𝐹‘(𝑘 − 1)))) ≤ 2) → (#‘(((iEdg‘𝐺)‘(𝐹‘(𝑘 − 1))) ∩ ((iEdg‘𝐺)‘(𝐹𝑘)))) ≤ 2))
3725, 36mpan2d 706 . . . . . . . . . 10 ((((𝐺 ∈ V ∧ 𝑆 ∈ ℕ0*) ∧ 𝐹 ∈ Word dom (iEdg‘𝐺) ∧ 𝐺 ∈ UPGraph ) ∧ 𝑘 ∈ (1..^(#‘𝐹))) → ((#‘(((iEdg‘𝐺)‘(𝐹‘(𝑘 − 1))) ∩ ((iEdg‘𝐺)‘(𝐹𝑘)))) ≤ (#‘((iEdg‘𝐺)‘(𝐹‘(𝑘 − 1)))) → (#‘(((iEdg‘𝐺)‘(𝐹‘(𝑘 − 1))) ∩ ((iEdg‘𝐺)‘(𝐹𝑘)))) ≤ 2))
385, 37mpi 20 . . . . . . . . 9 ((((𝐺 ∈ V ∧ 𝑆 ∈ ℕ0*) ∧ 𝐹 ∈ Word dom (iEdg‘𝐺) ∧ 𝐺 ∈ UPGraph ) ∧ 𝑘 ∈ (1..^(#‘𝐹))) → (#‘(((iEdg‘𝐺)‘(𝐹‘(𝑘 − 1))) ∩ ((iEdg‘𝐺)‘(𝐹𝑘)))) ≤ 2)
39 xnn0xr 11245 . . . . . . . . . . . . . 14 (𝑆 ∈ ℕ0*𝑆 ∈ ℝ*)
4028a1i 11 . . . . . . . . . . . . . 14 (𝑆 ∈ ℕ0* → (#‘(((iEdg‘𝐺)‘(𝐹‘(𝑘 − 1))) ∩ ((iEdg‘𝐺)‘(𝐹𝑘)))) ∈ ℝ*)
4132a1i 11 . . . . . . . . . . . . . 14 (𝑆 ∈ ℕ0* → 2 ∈ ℝ*)
42 xrletr 11865 . . . . . . . . . . . . . 14 ((𝑆 ∈ ℝ* ∧ (#‘(((iEdg‘𝐺)‘(𝐹‘(𝑘 − 1))) ∩ ((iEdg‘𝐺)‘(𝐹𝑘)))) ∈ ℝ* ∧ 2 ∈ ℝ*) → ((𝑆 ≤ (#‘(((iEdg‘𝐺)‘(𝐹‘(𝑘 − 1))) ∩ ((iEdg‘𝐺)‘(𝐹𝑘)))) ∧ (#‘(((iEdg‘𝐺)‘(𝐹‘(𝑘 − 1))) ∩ ((iEdg‘𝐺)‘(𝐹𝑘)))) ≤ 2) → 𝑆 ≤ 2))
4339, 40, 41, 42syl3anc 1318 . . . . . . . . . . . . 13 (𝑆 ∈ ℕ0* → ((𝑆 ≤ (#‘(((iEdg‘𝐺)‘(𝐹‘(𝑘 − 1))) ∩ ((iEdg‘𝐺)‘(𝐹𝑘)))) ∧ (#‘(((iEdg‘𝐺)‘(𝐹‘(𝑘 − 1))) ∩ ((iEdg‘𝐺)‘(𝐹𝑘)))) ≤ 2) → 𝑆 ≤ 2))
4443expcomd 453 . . . . . . . . . . . 12 (𝑆 ∈ ℕ0* → ((#‘(((iEdg‘𝐺)‘(𝐹‘(𝑘 − 1))) ∩ ((iEdg‘𝐺)‘(𝐹𝑘)))) ≤ 2 → (𝑆 ≤ (#‘(((iEdg‘𝐺)‘(𝐹‘(𝑘 − 1))) ∩ ((iEdg‘𝐺)‘(𝐹𝑘)))) → 𝑆 ≤ 2)))
4544adantl 481 . . . . . . . . . . 11 ((𝐺 ∈ V ∧ 𝑆 ∈ ℕ0*) → ((#‘(((iEdg‘𝐺)‘(𝐹‘(𝑘 − 1))) ∩ ((iEdg‘𝐺)‘(𝐹𝑘)))) ≤ 2 → (𝑆 ≤ (#‘(((iEdg‘𝐺)‘(𝐹‘(𝑘 − 1))) ∩ ((iEdg‘𝐺)‘(𝐹𝑘)))) → 𝑆 ≤ 2)))
46453ad2ant1 1075 . . . . . . . . . 10 (((𝐺 ∈ V ∧ 𝑆 ∈ ℕ0*) ∧ 𝐹 ∈ Word dom (iEdg‘𝐺) ∧ 𝐺 ∈ UPGraph ) → ((#‘(((iEdg‘𝐺)‘(𝐹‘(𝑘 − 1))) ∩ ((iEdg‘𝐺)‘(𝐹𝑘)))) ≤ 2 → (𝑆 ≤ (#‘(((iEdg‘𝐺)‘(𝐹‘(𝑘 − 1))) ∩ ((iEdg‘𝐺)‘(𝐹𝑘)))) → 𝑆 ≤ 2)))
4746adantr 480 . . . . . . . . 9 ((((𝐺 ∈ V ∧ 𝑆 ∈ ℕ0*) ∧ 𝐹 ∈ Word dom (iEdg‘𝐺) ∧ 𝐺 ∈ UPGraph ) ∧ 𝑘 ∈ (1..^(#‘𝐹))) → ((#‘(((iEdg‘𝐺)‘(𝐹‘(𝑘 − 1))) ∩ ((iEdg‘𝐺)‘(𝐹𝑘)))) ≤ 2 → (𝑆 ≤ (#‘(((iEdg‘𝐺)‘(𝐹‘(𝑘 − 1))) ∩ ((iEdg‘𝐺)‘(𝐹𝑘)))) → 𝑆 ≤ 2)))
4838, 47mpd 15 . . . . . . . 8 ((((𝐺 ∈ V ∧ 𝑆 ∈ ℕ0*) ∧ 𝐹 ∈ Word dom (iEdg‘𝐺) ∧ 𝐺 ∈ UPGraph ) ∧ 𝑘 ∈ (1..^(#‘𝐹))) → (𝑆 ≤ (#‘(((iEdg‘𝐺)‘(𝐹‘(𝑘 − 1))) ∩ ((iEdg‘𝐺)‘(𝐹𝑘)))) → 𝑆 ≤ 2))
4948ralimdva 2945 . . . . . . 7 (((𝐺 ∈ V ∧ 𝑆 ∈ ℕ0*) ∧ 𝐹 ∈ Word dom (iEdg‘𝐺) ∧ 𝐺 ∈ UPGraph ) → (∀𝑘 ∈ (1..^(#‘𝐹))𝑆 ≤ (#‘(((iEdg‘𝐺)‘(𝐹‘(𝑘 − 1))) ∩ ((iEdg‘𝐺)‘(𝐹𝑘)))) → ∀𝑘 ∈ (1..^(#‘𝐹))𝑆 ≤ 2))
50493exp 1256 . . . . . 6 ((𝐺 ∈ V ∧ 𝑆 ∈ ℕ0*) → (𝐹 ∈ Word dom (iEdg‘𝐺) → (𝐺 ∈ UPGraph → (∀𝑘 ∈ (1..^(#‘𝐹))𝑆 ≤ (#‘(((iEdg‘𝐺)‘(𝐹‘(𝑘 − 1))) ∩ ((iEdg‘𝐺)‘(𝐹𝑘)))) → ∀𝑘 ∈ (1..^(#‘𝐹))𝑆 ≤ 2))))
5150com34 89 . . . . 5 ((𝐺 ∈ V ∧ 𝑆 ∈ ℕ0*) → (𝐹 ∈ Word dom (iEdg‘𝐺) → (∀𝑘 ∈ (1..^(#‘𝐹))𝑆 ≤ (#‘(((iEdg‘𝐺)‘(𝐹‘(𝑘 − 1))) ∩ ((iEdg‘𝐺)‘(𝐹𝑘)))) → (𝐺 ∈ UPGraph → ∀𝑘 ∈ (1..^(#‘𝐹))𝑆 ≤ 2))))
52513imp 1249 . . . 4 (((𝐺 ∈ V ∧ 𝑆 ∈ ℕ0*) ∧ 𝐹 ∈ Word dom (iEdg‘𝐺) ∧ ∀𝑘 ∈ (1..^(#‘𝐹))𝑆 ≤ (#‘(((iEdg‘𝐺)‘(𝐹‘(𝑘 − 1))) ∩ ((iEdg‘𝐺)‘(𝐹𝑘))))) → (𝐺 ∈ UPGraph → ∀𝑘 ∈ (1..^(#‘𝐹))𝑆 ≤ 2))
53 lencl 13179 . . . . . 6 (𝐹 ∈ Word dom (iEdg‘𝐺) → (#‘𝐹) ∈ ℕ0)
54 1zzd 11285 . . . . . . . . . . . . . . . . . 18 ((#‘𝐹) ∈ ℕ0 → 1 ∈ ℤ)
55 nn0z 11277 . . . . . . . . . . . . . . . . . 18 ((#‘𝐹) ∈ ℕ0 → (#‘𝐹) ∈ ℤ)
5654, 55jca 553 . . . . . . . . . . . . . . . . 17 ((#‘𝐹) ∈ ℕ0 → (1 ∈ ℤ ∧ (#‘𝐹) ∈ ℤ))
57 fzon 12358 . . . . . . . . . . . . . . . . 17 ((1 ∈ ℤ ∧ (#‘𝐹) ∈ ℤ) → ((#‘𝐹) ≤ 1 ↔ (1..^(#‘𝐹)) = ∅))
5856, 57syl 17 . . . . . . . . . . . . . . . 16 ((#‘𝐹) ∈ ℕ0 → ((#‘𝐹) ≤ 1 ↔ (1..^(#‘𝐹)) = ∅))
5958bicomd 212 . . . . . . . . . . . . . . 15 ((#‘𝐹) ∈ ℕ0 → ((1..^(#‘𝐹)) = ∅ ↔ (#‘𝐹) ≤ 1))
60 nn0re 11178 . . . . . . . . . . . . . . . . 17 ((#‘𝐹) ∈ ℕ0 → (#‘𝐹) ∈ ℝ)
61 1red 9934 . . . . . . . . . . . . . . . . 17 ((#‘𝐹) ∈ ℕ0 → 1 ∈ ℝ)
6260, 61jca 553 . . . . . . . . . . . . . . . 16 ((#‘𝐹) ∈ ℕ0 → ((#‘𝐹) ∈ ℝ ∧ 1 ∈ ℝ))
63 lenlt 9995 . . . . . . . . . . . . . . . 16 (((#‘𝐹) ∈ ℝ ∧ 1 ∈ ℝ) → ((#‘𝐹) ≤ 1 ↔ ¬ 1 < (#‘𝐹)))
6462, 63syl 17 . . . . . . . . . . . . . . 15 ((#‘𝐹) ∈ ℕ0 → ((#‘𝐹) ≤ 1 ↔ ¬ 1 < (#‘𝐹)))
6559, 64bitrd 267 . . . . . . . . . . . . . 14 ((#‘𝐹) ∈ ℕ0 → ((1..^(#‘𝐹)) = ∅ ↔ ¬ 1 < (#‘𝐹)))
6665biimpd 218 . . . . . . . . . . . . 13 ((#‘𝐹) ∈ ℕ0 → ((1..^(#‘𝐹)) = ∅ → ¬ 1 < (#‘𝐹)))
6766necon2ad 2797 . . . . . . . . . . . 12 ((#‘𝐹) ∈ ℕ0 → (1 < (#‘𝐹) → (1..^(#‘𝐹)) ≠ ∅))
6867impcom 445 . . . . . . . . . . 11 ((1 < (#‘𝐹) ∧ (#‘𝐹) ∈ ℕ0) → (1..^(#‘𝐹)) ≠ ∅)
69 rspn0 3892 . . . . . . . . . . 11 ((1..^(#‘𝐹)) ≠ ∅ → (∀𝑘 ∈ (1..^(#‘𝐹))𝑆 ≤ 2 → 𝑆 ≤ 2))
7068, 69syl 17 . . . . . . . . . 10 ((1 < (#‘𝐹) ∧ (#‘𝐹) ∈ ℕ0) → (∀𝑘 ∈ (1..^(#‘𝐹))𝑆 ≤ 2 → 𝑆 ≤ 2))
7170ex 449 . . . . . . . . 9 (1 < (#‘𝐹) → ((#‘𝐹) ∈ ℕ0 → (∀𝑘 ∈ (1..^(#‘𝐹))𝑆 ≤ 2 → 𝑆 ≤ 2)))
7271com23 84 . . . . . . . 8 (1 < (#‘𝐹) → (∀𝑘 ∈ (1..^(#‘𝐹))𝑆 ≤ 2 → ((#‘𝐹) ∈ ℕ0𝑆 ≤ 2)))
7372com13 86 . . . . . . 7 ((#‘𝐹) ∈ ℕ0 → (∀𝑘 ∈ (1..^(#‘𝐹))𝑆 ≤ 2 → (1 < (#‘𝐹) → 𝑆 ≤ 2)))
7473a1i 11 . . . . . 6 (𝐹 ∈ Word dom (iEdg‘𝐺) → ((#‘𝐹) ∈ ℕ0 → (∀𝑘 ∈ (1..^(#‘𝐹))𝑆 ≤ 2 → (1 < (#‘𝐹) → 𝑆 ≤ 2))))
7553, 74mpd 15 . . . . 5 (𝐹 ∈ Word dom (iEdg‘𝐺) → (∀𝑘 ∈ (1..^(#‘𝐹))𝑆 ≤ 2 → (1 < (#‘𝐹) → 𝑆 ≤ 2)))
76753ad2ant2 1076 . . . 4 (((𝐺 ∈ V ∧ 𝑆 ∈ ℕ0*) ∧ 𝐹 ∈ Word dom (iEdg‘𝐺) ∧ ∀𝑘 ∈ (1..^(#‘𝐹))𝑆 ≤ (#‘(((iEdg‘𝐺)‘(𝐹‘(𝑘 − 1))) ∩ ((iEdg‘𝐺)‘(𝐹𝑘))))) → (∀𝑘 ∈ (1..^(#‘𝐹))𝑆 ≤ 2 → (1 < (#‘𝐹) → 𝑆 ≤ 2)))
7752, 76syld 46 . . 3 (((𝐺 ∈ V ∧ 𝑆 ∈ ℕ0*) ∧ 𝐹 ∈ Word dom (iEdg‘𝐺) ∧ ∀𝑘 ∈ (1..^(#‘𝐹))𝑆 ≤ (#‘(((iEdg‘𝐺)‘(𝐹‘(𝑘 − 1))) ∩ ((iEdg‘𝐺)‘(𝐹𝑘))))) → (𝐺 ∈ UPGraph → (1 < (#‘𝐹) → 𝑆 ≤ 2)))
782, 77syl 17 . 2 (𝐹 ∈ (𝐺 EdgWalks 𝑆) → (𝐺 ∈ UPGraph → (1 < (#‘𝐹) → 𝑆 ≤ 2)))
79783imp21 1269 1 ((𝐺 ∈ UPGraph ∧ 𝐹 ∈ (𝐺 EdgWalks 𝑆) ∧ 1 < (#‘𝐹)) → 𝑆 ≤ 2)
 Colors of variables: wff setvar class Syntax hints:  ¬ wn 3   → wi 4   ↔ wb 195   ∧ wa 383   ∧ w3a 1031   = wceq 1475   ∈ wcel 1977   ≠ wne 2780  ∀wral 2896  Vcvv 3173   ∩ cin 3539  ∅c0 3874   class class class wbr 4583  dom cdm 5038  Fun wfun 5798   Fn wfn 5799  ‘cfv 5804  (class class class)co 6549  ℝcr 9814  0cc0 9815  1c1 9816  ℝ*cxr 9952   < clt 9953   ≤ cle 9954   − cmin 10145  2c2 10947  ℕ0cn0 11169  ℕ0*cxnn0 11240  ℤcz 11254  ...cfz 12197  ..^cfzo 12334  #chash 12979  Word cword 13146  Vtxcvtx 25673  iEdgciedg 25674   UHGraph cuhgr 25722   UPGraph cupgr 25747   EdgWalks cewlks 40795 This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1713  ax-4 1728  ax-5 1827  ax-6 1875  ax-7 1922  ax-8 1979  ax-9 1986  ax-10 2006  ax-11 2021  ax-12 2034  ax-13 2234  ax-ext 2590  ax-rep 4699  ax-sep 4709  ax-nul 4717  ax-pow 4769  ax-pr 4833  ax-un 6847  ax-cnex 9871  ax-resscn 9872  ax-1cn 9873  ax-icn 9874  ax-addcl 9875  ax-addrcl 9876  ax-mulcl 9877  ax-mulrcl 9878  ax-mulcom 9879  ax-addass 9880  ax-mulass 9881  ax-distr 9882  ax-i2m1 9883  ax-1ne0 9884  ax-1rid 9885  ax-rnegex 9886  ax-rrecex 9887  ax-cnre 9888  ax-pre-lttri 9889  ax-pre-lttrn 9890  ax-pre-ltadd 9891  ax-pre-mulgt0 9892 This theorem depends on definitions:  df-bi 196  df-or 384  df-an 385  df-3or 1032  df-3an 1033  df-tru 1478  df-ex 1696  df-nf 1701  df-sb 1868  df-eu 2462  df-mo 2463  df-clab 2597  df-cleq 2603  df-clel 2606  df-nfc 2740  df-ne 2782  df-nel 2783  df-ral 2901  df-rex 2902  df-reu 2903  df-rab 2905  df-v 3175  df-sbc 3403  df-csb 3500  df-dif 3543  df-un 3545  df-in 3547  df-ss 3554  df-pss 3556  df-nul 3875  df-if 4037  df-pw 4110  df-sn 4126  df-pr 4128  df-tp 4130  df-op 4132  df-uni 4373  df-int 4411  df-iun 4457  df-br 4584  df-opab 4644  df-mpt 4645  df-tr 4681  df-eprel 4949  df-id 4953  df-po 4959  df-so 4960  df-fr 4997  df-we 4999  df-xp 5044  df-rel 5045  df-cnv 5046  df-co 5047  df-dm 5048  df-rn 5049  df-res 5050  df-ima 5051  df-pred 5597  df-ord 5643  df-on 5644  df-lim 5645  df-suc 5646  df-iota 5768  df-fun 5806  df-fn 5807  df-f 5808  df-f1 5809  df-fo 5810  df-f1o 5811  df-fv 5812  df-riota 6511  df-ov 6552  df-oprab 6553  df-mpt2 6554  df-om 6958  df-1st 7059  df-2nd 7060  df-wrecs 7294  df-recs 7355  df-rdg 7393  df-1o 7447  df-oadd 7451  df-er 7629  df-map 7746  df-pm 7747  df-en 7842  df-dom 7843  df-sdom 7844  df-fin 7845  df-card 8648  df-pnf 9955  df-mnf 9956  df-xr 9957  df-ltxr 9958  df-le 9959  df-sub 10147  df-neg 10148  df-nn 10898  df-2 10956  df-n0 11170  df-xnn0 11241  df-z 11255  df-uz 11564  df-fz 12198  df-fzo 12335  df-hash 12980  df-word 13154  df-uhgr 25724  df-upgr 25749  df-ewlks 40799 This theorem is referenced by: (None)
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