Proof of Theorem elwwlks2ons3im
| Step | Hyp | Ref
| Expression |
| 1 | | wwlks2onv.v |
. . 3
⊢ 𝑉 = (Vtx‘𝐺) |
| 2 | 1 | wwlksonvtx 29941 |
. 2
⊢ (𝑊 ∈ (𝐴(2 WWalksNOn 𝐺)𝐶) → (𝐴 ∈ 𝑉 ∧ 𝐶 ∈ 𝑉)) |
| 3 | | wwlknon 29943 |
. . 3
⊢ (𝑊 ∈ (𝐴(2 WWalksNOn 𝐺)𝐶) ↔ (𝑊 ∈ (2 WWalksN 𝐺) ∧ (𝑊‘0) = 𝐴 ∧ (𝑊‘2) = 𝐶)) |
| 4 | | wwlknbp1 29930 |
. . . . 5
⊢ (𝑊 ∈ (2 WWalksN 𝐺) → (2 ∈
ℕ0 ∧ 𝑊
∈ Word (Vtx‘𝐺)
∧ (♯‘𝑊) =
(2 + 1))) |
| 5 | | 2p1e3 12309 |
. . . . . . . 8
⊢ (2 + 1) =
3 |
| 6 | 5 | eqeq2i 2752 |
. . . . . . 7
⊢
((♯‘𝑊) =
(2 + 1) ↔ (♯‘𝑊) = 3) |
| 7 | | 1ex 11131 |
. . . . . . . . . . . . . 14
⊢ 1 ∈
V |
| 8 | 7 | tpid2 4702 |
. . . . . . . . . . . . 13
⊢ 1 ∈
{0, 1, 2} |
| 9 | | fzo0to3tp 13698 |
. . . . . . . . . . . . 13
⊢ (0..^3) =
{0, 1, 2} |
| 10 | 8, 9 | eleqtrri 2838 |
. . . . . . . . . . . 12
⊢ 1 ∈
(0..^3) |
| 11 | | oveq2 7364 |
. . . . . . . . . . . 12
⊢
((♯‘𝑊) =
3 → (0..^(♯‘𝑊)) = (0..^3)) |
| 12 | 10, 11 | eleqtrrid 2846 |
. . . . . . . . . . 11
⊢
((♯‘𝑊) =
3 → 1 ∈ (0..^(♯‘𝑊))) |
| 13 | | wrdsymbcl 14480 |
. . . . . . . . . . 11
⊢ ((𝑊 ∈ Word (Vtx‘𝐺) ∧ 1 ∈
(0..^(♯‘𝑊)))
→ (𝑊‘1) ∈
(Vtx‘𝐺)) |
| 14 | 12, 13 | sylan2 599 |
. . . . . . . . . 10
⊢ ((𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = 3) → (𝑊‘1) ∈ (Vtx‘𝐺)) |
| 15 | 14 | 3ad2ant1 1139 |
. . . . . . . . 9
⊢ (((𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = 3) ∧ ((𝑊‘0) = 𝐴 ∧ (𝑊‘2) = 𝐶) ∧ (𝐴 ∈ 𝑉 ∧ 𝐶 ∈ 𝑉)) → (𝑊‘1) ∈ (Vtx‘𝐺)) |
| 16 | | simpl1r 1232 |
. . . . . . . . . . 11
⊢ ((((𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = 3) ∧ ((𝑊‘0) = 𝐴 ∧ (𝑊‘2) = 𝐶) ∧ (𝐴 ∈ 𝑉 ∧ 𝐶 ∈ 𝑉)) ∧ (𝑊‘1) ∈ (Vtx‘𝐺)) → (♯‘𝑊) = 3) |
| 17 | | simpl 483 |
. . . . . . . . . . . . . 14
⊢ (((𝑊‘0) = 𝐴 ∧ (𝑊‘2) = 𝐶) → (𝑊‘0) = 𝐴) |
| 18 | | eqidd 2740 |
. . . . . . . . . . . . . 14
⊢ (((𝑊‘0) = 𝐴 ∧ (𝑊‘2) = 𝐶) → (𝑊‘1) = (𝑊‘1)) |
| 19 | | simpr 485 |
. . . . . . . . . . . . . 14
⊢ (((𝑊‘0) = 𝐴 ∧ (𝑊‘2) = 𝐶) → (𝑊‘2) = 𝐶) |
| 20 | 17, 18, 19 | 3jca 1134 |
. . . . . . . . . . . . 13
⊢ (((𝑊‘0) = 𝐴 ∧ (𝑊‘2) = 𝐶) → ((𝑊‘0) = 𝐴 ∧ (𝑊‘1) = (𝑊‘1) ∧ (𝑊‘2) = 𝐶)) |
| 21 | 20 | 3ad2ant2 1140 |
. . . . . . . . . . . 12
⊢ (((𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = 3) ∧ ((𝑊‘0) = 𝐴 ∧ (𝑊‘2) = 𝐶) ∧ (𝐴 ∈ 𝑉 ∧ 𝐶 ∈ 𝑉)) → ((𝑊‘0) = 𝐴 ∧ (𝑊‘1) = (𝑊‘1) ∧ (𝑊‘2) = 𝐶)) |
| 22 | 21 | adantr 481 |
. . . . . . . . . . 11
⊢ ((((𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = 3) ∧ ((𝑊‘0) = 𝐴 ∧ (𝑊‘2) = 𝐶) ∧ (𝐴 ∈ 𝑉 ∧ 𝐶 ∈ 𝑉)) ∧ (𝑊‘1) ∈ (Vtx‘𝐺)) → ((𝑊‘0) = 𝐴 ∧ (𝑊‘1) = (𝑊‘1) ∧ (𝑊‘2) = 𝐶)) |
| 23 | 1 | eqcomi 2748 |
. . . . . . . . . . . . . . . . 17
⊢
(Vtx‘𝐺) =
𝑉 |
| 24 | 23 | wrdeqi 14490 |
. . . . . . . . . . . . . . . 16
⊢ Word
(Vtx‘𝐺) = Word 𝑉 |
| 25 | 24 | eleq2i 2831 |
. . . . . . . . . . . . . . 15
⊢ (𝑊 ∈ Word (Vtx‘𝐺) ↔ 𝑊 ∈ Word 𝑉) |
| 26 | 25 | birani 504 |
. . . . . . . . . . . . . 14
⊢ ((𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = 3) → 𝑊 ∈ Word 𝑉) |
| 27 | 26 | 3ad2ant1 1139 |
. . . . . . . . . . . . 13
⊢ (((𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = 3) ∧ ((𝑊‘0) = 𝐴 ∧ (𝑊‘2) = 𝐶) ∧ (𝐴 ∈ 𝑉 ∧ 𝐶 ∈ 𝑉)) → 𝑊 ∈ Word 𝑉) |
| 28 | 27 | adantr 481 |
. . . . . . . . . . . 12
⊢ ((((𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = 3) ∧ ((𝑊‘0) = 𝐴 ∧ (𝑊‘2) = 𝐶) ∧ (𝐴 ∈ 𝑉 ∧ 𝐶 ∈ 𝑉)) ∧ (𝑊‘1) ∈ (Vtx‘𝐺)) → 𝑊 ∈ Word 𝑉) |
| 29 | | simpl3l 1235 |
. . . . . . . . . . . 12
⊢ ((((𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = 3) ∧ ((𝑊‘0) = 𝐴 ∧ (𝑊‘2) = 𝐶) ∧ (𝐴 ∈ 𝑉 ∧ 𝐶 ∈ 𝑉)) ∧ (𝑊‘1) ∈ (Vtx‘𝐺)) → 𝐴 ∈ 𝑉) |
| 30 | 23 | eleq2i 2831 |
. . . . . . . . . . . . 13
⊢ ((𝑊‘1) ∈
(Vtx‘𝐺) ↔ (𝑊‘1) ∈ 𝑉) |
| 31 | 30 | bilani 505 |
. . . . . . . . . . . 12
⊢ ((((𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = 3) ∧ ((𝑊‘0) = 𝐴 ∧ (𝑊‘2) = 𝐶) ∧ (𝐴 ∈ 𝑉 ∧ 𝐶 ∈ 𝑉)) ∧ (𝑊‘1) ∈ (Vtx‘𝐺)) → (𝑊‘1) ∈ 𝑉) |
| 32 | | simpl3r 1236 |
. . . . . . . . . . . 12
⊢ ((((𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = 3) ∧ ((𝑊‘0) = 𝐴 ∧ (𝑊‘2) = 𝐶) ∧ (𝐴 ∈ 𝑉 ∧ 𝐶 ∈ 𝑉)) ∧ (𝑊‘1) ∈ (Vtx‘𝐺)) → 𝐶 ∈ 𝑉) |
| 33 | | eqwrds3 14914 |
. . . . . . . . . . . 12
⊢ ((𝑊 ∈ Word 𝑉 ∧ (𝐴 ∈ 𝑉 ∧ (𝑊‘1) ∈ 𝑉 ∧ 𝐶 ∈ 𝑉)) → (𝑊 = 〈“𝐴(𝑊‘1)𝐶”〉 ↔ ((♯‘𝑊) = 3 ∧ ((𝑊‘0) = 𝐴 ∧ (𝑊‘1) = (𝑊‘1) ∧ (𝑊‘2) = 𝐶)))) |
| 34 | 28, 29, 31, 32, 33 | syl13anc 1380 |
. . . . . . . . . . 11
⊢ ((((𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = 3) ∧ ((𝑊‘0) = 𝐴 ∧ (𝑊‘2) = 𝐶) ∧ (𝐴 ∈ 𝑉 ∧ 𝐶 ∈ 𝑉)) ∧ (𝑊‘1) ∈ (Vtx‘𝐺)) → (𝑊 = 〈“𝐴(𝑊‘1)𝐶”〉 ↔ ((♯‘𝑊) = 3 ∧ ((𝑊‘0) = 𝐴 ∧ (𝑊‘1) = (𝑊‘1) ∧ (𝑊‘2) = 𝐶)))) |
| 35 | 16, 22, 34 | mpbir2and 719 |
. . . . . . . . . 10
⊢ ((((𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = 3) ∧ ((𝑊‘0) = 𝐴 ∧ (𝑊‘2) = 𝐶) ∧ (𝐴 ∈ 𝑉 ∧ 𝐶 ∈ 𝑉)) ∧ (𝑊‘1) ∈ (Vtx‘𝐺)) → 𝑊 = 〈“𝐴(𝑊‘1)𝐶”〉) |
| 36 | 35, 31 | jca 516 |
. . . . . . . . 9
⊢ ((((𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = 3) ∧ ((𝑊‘0) = 𝐴 ∧ (𝑊‘2) = 𝐶) ∧ (𝐴 ∈ 𝑉 ∧ 𝐶 ∈ 𝑉)) ∧ (𝑊‘1) ∈ (Vtx‘𝐺)) → (𝑊 = 〈“𝐴(𝑊‘1)𝐶”〉 ∧ (𝑊‘1) ∈ 𝑉)) |
| 37 | 15, 36 | mpdan 693 |
. . . . . . . 8
⊢ (((𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = 3) ∧ ((𝑊‘0) = 𝐴 ∧ (𝑊‘2) = 𝐶) ∧ (𝐴 ∈ 𝑉 ∧ 𝐶 ∈ 𝑉)) → (𝑊 = 〈“𝐴(𝑊‘1)𝐶”〉 ∧ (𝑊‘1) ∈ 𝑉)) |
| 38 | 37 | 3exp 1125 |
. . . . . . 7
⊢ ((𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = 3) → (((𝑊‘0) = 𝐴 ∧ (𝑊‘2) = 𝐶) → ((𝐴 ∈ 𝑉 ∧ 𝐶 ∈ 𝑉) → (𝑊 = 〈“𝐴(𝑊‘1)𝐶”〉 ∧ (𝑊‘1) ∈ 𝑉)))) |
| 39 | 6, 38 | sylan2b 600 |
. . . . . 6
⊢ ((𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (2 + 1)) → (((𝑊‘0) = 𝐴 ∧ (𝑊‘2) = 𝐶) → ((𝐴 ∈ 𝑉 ∧ 𝐶 ∈ 𝑉) → (𝑊 = 〈“𝐴(𝑊‘1)𝐶”〉 ∧ (𝑊‘1) ∈ 𝑉)))) |
| 40 | 39 | 3adant1 1136 |
. . . . 5
⊢ ((2
∈ ℕ0 ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (2 + 1)) → (((𝑊‘0) = 𝐴 ∧ (𝑊‘2) = 𝐶) → ((𝐴 ∈ 𝑉 ∧ 𝐶 ∈ 𝑉) → (𝑊 = 〈“𝐴(𝑊‘1)𝐶”〉 ∧ (𝑊‘1) ∈ 𝑉)))) |
| 41 | 4, 40 | syl 17 |
. . . 4
⊢ (𝑊 ∈ (2 WWalksN 𝐺) → (((𝑊‘0) = 𝐴 ∧ (𝑊‘2) = 𝐶) → ((𝐴 ∈ 𝑉 ∧ 𝐶 ∈ 𝑉) → (𝑊 = 〈“𝐴(𝑊‘1)𝐶”〉 ∧ (𝑊‘1) ∈ 𝑉)))) |
| 42 | 41 | 3impib 1122 |
. . 3
⊢ ((𝑊 ∈ (2 WWalksN 𝐺) ∧ (𝑊‘0) = 𝐴 ∧ (𝑊‘2) = 𝐶) → ((𝐴 ∈ 𝑉 ∧ 𝐶 ∈ 𝑉) → (𝑊 = 〈“𝐴(𝑊‘1)𝐶”〉 ∧ (𝑊‘1) ∈ 𝑉))) |
| 43 | 3, 42 | sylbi 218 |
. 2
⊢ (𝑊 ∈ (𝐴(2 WWalksNOn 𝐺)𝐶) → ((𝐴 ∈ 𝑉 ∧ 𝐶 ∈ 𝑉) → (𝑊 = 〈“𝐴(𝑊‘1)𝐶”〉 ∧ (𝑊‘1) ∈ 𝑉))) |
| 44 | 2, 43 | mpd 15 |
1
⊢ (𝑊 ∈ (𝐴(2 WWalksNOn 𝐺)𝐶) → (𝑊 = 〈“𝐴(𝑊‘1)𝐶”〉 ∧ (𝑊‘1) ∈ 𝑉)) |