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Description: If a word represents a walk in (in a graph) and there are edges between the last vertex of the word and another vertex and between this other vertex and the first vertex of the word, then the concatenation of the word representing the walk with this other vertex represents a closed walk. (Contributed by Alexander van der Vekens, 3-Oct-2018) (Revised by AV, 27-Apr-2021) (Revised by AV, 14-Mar-2022)
| Ref | Expression | ||
|---|---|---|---|
| Hypotheses | clwwlkext2edg.v | ⊢ 𝑉 = ( Vtx ‘ 𝐺 ) | |
| clwwlkext2edg.e | ⊢ 𝐸 = ( Edg ‘ 𝐺 ) | ||
| Assertion | wwlksext2clwwlk | ⊢ ( ( 𝑊 ∈ ( 𝑁 WWalksN 𝐺 ) ∧ 𝑍 ∈ 𝑉 ) → ( ( { ( lastS ‘ 𝑊 ) , 𝑍 } ∈ 𝐸 ∧ { 𝑍 , ( 𝑊 ‘ 0 ) } ∈ 𝐸 ) → ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ∈ ( ( 𝑁 + 2 ) ClWWalksN 𝐺 ) ) ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | clwwlkext2edg.v | ⊢ 𝑉 = ( Vtx ‘ 𝐺 ) | |
| 2 | clwwlkext2edg.e | ⊢ 𝐸 = ( Edg ‘ 𝐺 ) | |
| 3 | wwlknbp1 | ⊢ ( 𝑊 ∈ ( 𝑁 WWalksN 𝐺 ) → ( 𝑁 ∈ ℕ0 ∧ 𝑊 ∈ Word ( Vtx ‘ 𝐺 ) ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ) | |
| 4 | 1 | wrdeqi | ⊢ Word 𝑉 = Word ( Vtx ‘ 𝐺 ) |
| 5 | 4 | eleq2i | ⊢ ( 𝑊 ∈ Word 𝑉 ↔ 𝑊 ∈ Word ( Vtx ‘ 𝐺 ) ) |
| 6 | 5 | biimpri | ⊢ ( 𝑊 ∈ Word ( Vtx ‘ 𝐺 ) → 𝑊 ∈ Word 𝑉 ) |
| 7 | 6 | 3ad2ant2 | ⊢ ( ( 𝑁 ∈ ℕ0 ∧ 𝑊 ∈ Word ( Vtx ‘ 𝐺 ) ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) → 𝑊 ∈ Word 𝑉 ) |
| 8 | 7 | ad2antlr | ⊢ ( ( ( 𝑊 ∈ ( 𝑁 WWalksN 𝐺 ) ∧ ( 𝑁 ∈ ℕ0 ∧ 𝑊 ∈ Word ( Vtx ‘ 𝐺 ) ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ) ∧ 𝑍 ∈ 𝑉 ) → 𝑊 ∈ Word 𝑉 ) |
| 9 | s1cl | ⊢ ( 𝑍 ∈ 𝑉 → 〈“ 𝑍 ”〉 ∈ Word 𝑉 ) | |
| 10 | 9 | adantl | ⊢ ( ( ( 𝑊 ∈ ( 𝑁 WWalksN 𝐺 ) ∧ ( 𝑁 ∈ ℕ0 ∧ 𝑊 ∈ Word ( Vtx ‘ 𝐺 ) ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ) ∧ 𝑍 ∈ 𝑉 ) → 〈“ 𝑍 ”〉 ∈ Word 𝑉 ) |
| 11 | ccatcl | ⊢ ( ( 𝑊 ∈ Word 𝑉 ∧ 〈“ 𝑍 ”〉 ∈ Word 𝑉 ) → ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ∈ Word 𝑉 ) | |
| 12 | 8 10 11 | syl2anc | ⊢ ( ( ( 𝑊 ∈ ( 𝑁 WWalksN 𝐺 ) ∧ ( 𝑁 ∈ ℕ0 ∧ 𝑊 ∈ Word ( Vtx ‘ 𝐺 ) ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ) ∧ 𝑍 ∈ 𝑉 ) → ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ∈ Word 𝑉 ) |
| 13 | 12 | adantr | ⊢ ( ( ( ( 𝑊 ∈ ( 𝑁 WWalksN 𝐺 ) ∧ ( 𝑁 ∈ ℕ0 ∧ 𝑊 ∈ Word ( Vtx ‘ 𝐺 ) ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ) ∧ 𝑍 ∈ 𝑉 ) ∧ ( { ( lastS ‘ 𝑊 ) , 𝑍 } ∈ 𝐸 ∧ { 𝑍 , ( 𝑊 ‘ 0 ) } ∈ 𝐸 ) ) → ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ∈ Word 𝑉 ) |
| 14 | 1 2 | wwlknp | ⊢ ( 𝑊 ∈ ( 𝑁 WWalksN 𝐺 ) → ( 𝑊 ∈ Word 𝑉 ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ∧ ∀ 𝑖 ∈ ( 0 ..^ 𝑁 ) { ( 𝑊 ‘ 𝑖 ) , ( 𝑊 ‘ ( 𝑖 + 1 ) ) } ∈ 𝐸 ) ) |
| 15 | simplll | ⊢ ( ( ( ( 𝑊 ∈ Word 𝑉 ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ∧ ( 𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0 ) ) ∧ 𝑖 ∈ ( 0 ..^ 𝑁 ) ) → 𝑊 ∈ Word 𝑉 ) | |
| 16 | 9 | adantr | ⊢ ( ( 𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0 ) → 〈“ 𝑍 ”〉 ∈ Word 𝑉 ) |
| 17 | 16 | ad2antlr | ⊢ ( ( ( ( 𝑊 ∈ Word 𝑉 ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ∧ ( 𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0 ) ) ∧ 𝑖 ∈ ( 0 ..^ 𝑁 ) ) → 〈“ 𝑍 ”〉 ∈ Word 𝑉 ) |
| 18 | elfzo0 | ⊢ ( 𝑖 ∈ ( 0 ..^ 𝑁 ) ↔ ( 𝑖 ∈ ℕ0 ∧ 𝑁 ∈ ℕ ∧ 𝑖 < 𝑁 ) ) | |
| 19 | simp1 | ⊢ ( ( 𝑖 ∈ ℕ0 ∧ 𝑁 ∈ ℕ ∧ 𝑖 < 𝑁 ) → 𝑖 ∈ ℕ0 ) | |
| 20 | peano2nn | ⊢ ( 𝑁 ∈ ℕ → ( 𝑁 + 1 ) ∈ ℕ ) | |
| 21 | 20 | 3ad2ant2 | ⊢ ( ( 𝑖 ∈ ℕ0 ∧ 𝑁 ∈ ℕ ∧ 𝑖 < 𝑁 ) → ( 𝑁 + 1 ) ∈ ℕ ) |
| 22 | nn0re | ⊢ ( 𝑖 ∈ ℕ0 → 𝑖 ∈ ℝ ) | |
| 23 | 22 | 3ad2ant1 | ⊢ ( ( 𝑖 ∈ ℕ0 ∧ 𝑁 ∈ ℕ ∧ 𝑖 < 𝑁 ) → 𝑖 ∈ ℝ ) |
| 24 | nnre | ⊢ ( 𝑁 ∈ ℕ → 𝑁 ∈ ℝ ) | |
| 25 | 24 | 3ad2ant2 | ⊢ ( ( 𝑖 ∈ ℕ0 ∧ 𝑁 ∈ ℕ ∧ 𝑖 < 𝑁 ) → 𝑁 ∈ ℝ ) |
| 26 | peano2re | ⊢ ( 𝑁 ∈ ℝ → ( 𝑁 + 1 ) ∈ ℝ ) | |
| 27 | 24 26 | syl | ⊢ ( 𝑁 ∈ ℕ → ( 𝑁 + 1 ) ∈ ℝ ) |
| 28 | 27 | 3ad2ant2 | ⊢ ( ( 𝑖 ∈ ℕ0 ∧ 𝑁 ∈ ℕ ∧ 𝑖 < 𝑁 ) → ( 𝑁 + 1 ) ∈ ℝ ) |
| 29 | simp3 | ⊢ ( ( 𝑖 ∈ ℕ0 ∧ 𝑁 ∈ ℕ ∧ 𝑖 < 𝑁 ) → 𝑖 < 𝑁 ) | |
| 30 | 24 | ltp1d | ⊢ ( 𝑁 ∈ ℕ → 𝑁 < ( 𝑁 + 1 ) ) |
| 31 | 30 | 3ad2ant2 | ⊢ ( ( 𝑖 ∈ ℕ0 ∧ 𝑁 ∈ ℕ ∧ 𝑖 < 𝑁 ) → 𝑁 < ( 𝑁 + 1 ) ) |
| 32 | 23 25 28 29 31 | lttrd | ⊢ ( ( 𝑖 ∈ ℕ0 ∧ 𝑁 ∈ ℕ ∧ 𝑖 < 𝑁 ) → 𝑖 < ( 𝑁 + 1 ) ) |
| 33 | elfzo0 | ⊢ ( 𝑖 ∈ ( 0 ..^ ( 𝑁 + 1 ) ) ↔ ( 𝑖 ∈ ℕ0 ∧ ( 𝑁 + 1 ) ∈ ℕ ∧ 𝑖 < ( 𝑁 + 1 ) ) ) | |
| 34 | 19 21 32 33 | syl3anbrc | ⊢ ( ( 𝑖 ∈ ℕ0 ∧ 𝑁 ∈ ℕ ∧ 𝑖 < 𝑁 ) → 𝑖 ∈ ( 0 ..^ ( 𝑁 + 1 ) ) ) |
| 35 | 18 34 | sylbi | ⊢ ( 𝑖 ∈ ( 0 ..^ 𝑁 ) → 𝑖 ∈ ( 0 ..^ ( 𝑁 + 1 ) ) ) |
| 36 | 35 | adantl | ⊢ ( ( ( ( 𝑊 ∈ Word 𝑉 ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ∧ ( 𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0 ) ) ∧ 𝑖 ∈ ( 0 ..^ 𝑁 ) ) → 𝑖 ∈ ( 0 ..^ ( 𝑁 + 1 ) ) ) |
| 37 | oveq2 | ⊢ ( ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) → ( 0 ..^ ( ♯ ‘ 𝑊 ) ) = ( 0 ..^ ( 𝑁 + 1 ) ) ) | |
| 38 | 37 | adantl | ⊢ ( ( 𝑊 ∈ Word 𝑉 ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) → ( 0 ..^ ( ♯ ‘ 𝑊 ) ) = ( 0 ..^ ( 𝑁 + 1 ) ) ) |
| 39 | 38 | eleq2d | ⊢ ( ( 𝑊 ∈ Word 𝑉 ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) → ( 𝑖 ∈ ( 0 ..^ ( ♯ ‘ 𝑊 ) ) ↔ 𝑖 ∈ ( 0 ..^ ( 𝑁 + 1 ) ) ) ) |
| 40 | 39 | ad2antrr | ⊢ ( ( ( ( 𝑊 ∈ Word 𝑉 ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ∧ ( 𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0 ) ) ∧ 𝑖 ∈ ( 0 ..^ 𝑁 ) ) → ( 𝑖 ∈ ( 0 ..^ ( ♯ ‘ 𝑊 ) ) ↔ 𝑖 ∈ ( 0 ..^ ( 𝑁 + 1 ) ) ) ) |
| 41 | 36 40 | mpbird | ⊢ ( ( ( ( 𝑊 ∈ Word 𝑉 ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ∧ ( 𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0 ) ) ∧ 𝑖 ∈ ( 0 ..^ 𝑁 ) ) → 𝑖 ∈ ( 0 ..^ ( ♯ ‘ 𝑊 ) ) ) |
| 42 | ccatval1 | ⊢ ( ( 𝑊 ∈ Word 𝑉 ∧ 〈“ 𝑍 ”〉 ∈ Word 𝑉 ∧ 𝑖 ∈ ( 0 ..^ ( ♯ ‘ 𝑊 ) ) ) → ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ 𝑖 ) = ( 𝑊 ‘ 𝑖 ) ) | |
| 43 | 15 17 41 42 | syl3anc | ⊢ ( ( ( ( 𝑊 ∈ Word 𝑉 ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ∧ ( 𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0 ) ) ∧ 𝑖 ∈ ( 0 ..^ 𝑁 ) ) → ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ 𝑖 ) = ( 𝑊 ‘ 𝑖 ) ) |
| 44 | fzonn0p1p1 | ⊢ ( 𝑖 ∈ ( 0 ..^ 𝑁 ) → ( 𝑖 + 1 ) ∈ ( 0 ..^ ( 𝑁 + 1 ) ) ) | |
| 45 | 44 | adantl | ⊢ ( ( ( ( 𝑊 ∈ Word 𝑉 ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ∧ ( 𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0 ) ) ∧ 𝑖 ∈ ( 0 ..^ 𝑁 ) ) → ( 𝑖 + 1 ) ∈ ( 0 ..^ ( 𝑁 + 1 ) ) ) |
| 46 | 37 | eleq2d | ⊢ ( ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) → ( ( 𝑖 + 1 ) ∈ ( 0 ..^ ( ♯ ‘ 𝑊 ) ) ↔ ( 𝑖 + 1 ) ∈ ( 0 ..^ ( 𝑁 + 1 ) ) ) ) |
| 47 | 46 | ad3antlr | ⊢ ( ( ( ( 𝑊 ∈ Word 𝑉 ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ∧ ( 𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0 ) ) ∧ 𝑖 ∈ ( 0 ..^ 𝑁 ) ) → ( ( 𝑖 + 1 ) ∈ ( 0 ..^ ( ♯ ‘ 𝑊 ) ) ↔ ( 𝑖 + 1 ) ∈ ( 0 ..^ ( 𝑁 + 1 ) ) ) ) |
| 48 | 45 47 | mpbird | ⊢ ( ( ( ( 𝑊 ∈ Word 𝑉 ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ∧ ( 𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0 ) ) ∧ 𝑖 ∈ ( 0 ..^ 𝑁 ) ) → ( 𝑖 + 1 ) ∈ ( 0 ..^ ( ♯ ‘ 𝑊 ) ) ) |
| 49 | ccatval1 | ⊢ ( ( 𝑊 ∈ Word 𝑉 ∧ 〈“ 𝑍 ”〉 ∈ Word 𝑉 ∧ ( 𝑖 + 1 ) ∈ ( 0 ..^ ( ♯ ‘ 𝑊 ) ) ) → ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ ( 𝑖 + 1 ) ) = ( 𝑊 ‘ ( 𝑖 + 1 ) ) ) | |
| 50 | 15 17 48 49 | syl3anc | ⊢ ( ( ( ( 𝑊 ∈ Word 𝑉 ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ∧ ( 𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0 ) ) ∧ 𝑖 ∈ ( 0 ..^ 𝑁 ) ) → ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ ( 𝑖 + 1 ) ) = ( 𝑊 ‘ ( 𝑖 + 1 ) ) ) |
| 51 | 43 50 | preq12d | ⊢ ( ( ( ( 𝑊 ∈ Word 𝑉 ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ∧ ( 𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0 ) ) ∧ 𝑖 ∈ ( 0 ..^ 𝑁 ) ) → { ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ 𝑖 ) , ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ ( 𝑖 + 1 ) ) } = { ( 𝑊 ‘ 𝑖 ) , ( 𝑊 ‘ ( 𝑖 + 1 ) ) } ) |
| 52 | 51 | ex | ⊢ ( ( ( 𝑊 ∈ Word 𝑉 ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ∧ ( 𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0 ) ) → ( 𝑖 ∈ ( 0 ..^ 𝑁 ) → { ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ 𝑖 ) , ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ ( 𝑖 + 1 ) ) } = { ( 𝑊 ‘ 𝑖 ) , ( 𝑊 ‘ ( 𝑖 + 1 ) ) } ) ) |
| 53 | 52 | expcom | ⊢ ( ( 𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0 ) → ( ( 𝑊 ∈ Word 𝑉 ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) → ( 𝑖 ∈ ( 0 ..^ 𝑁 ) → { ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ 𝑖 ) , ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ ( 𝑖 + 1 ) ) } = { ( 𝑊 ‘ 𝑖 ) , ( 𝑊 ‘ ( 𝑖 + 1 ) ) } ) ) ) |
| 54 | 53 | expcom | ⊢ ( 𝑁 ∈ ℕ0 → ( 𝑍 ∈ 𝑉 → ( ( 𝑊 ∈ Word 𝑉 ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) → ( 𝑖 ∈ ( 0 ..^ 𝑁 ) → { ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ 𝑖 ) , ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ ( 𝑖 + 1 ) ) } = { ( 𝑊 ‘ 𝑖 ) , ( 𝑊 ‘ ( 𝑖 + 1 ) ) } ) ) ) ) |
| 55 | 54 | 3ad2ant1 | ⊢ ( ( 𝑁 ∈ ℕ0 ∧ 𝑊 ∈ Word ( Vtx ‘ 𝐺 ) ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) → ( 𝑍 ∈ 𝑉 → ( ( 𝑊 ∈ Word 𝑉 ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) → ( 𝑖 ∈ ( 0 ..^ 𝑁 ) → { ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ 𝑖 ) , ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ ( 𝑖 + 1 ) ) } = { ( 𝑊 ‘ 𝑖 ) , ( 𝑊 ‘ ( 𝑖 + 1 ) ) } ) ) ) ) |
| 56 | 55 | imp | ⊢ ( ( ( 𝑁 ∈ ℕ0 ∧ 𝑊 ∈ Word ( Vtx ‘ 𝐺 ) ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ∧ 𝑍 ∈ 𝑉 ) → ( ( 𝑊 ∈ Word 𝑉 ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) → ( 𝑖 ∈ ( 0 ..^ 𝑁 ) → { ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ 𝑖 ) , ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ ( 𝑖 + 1 ) ) } = { ( 𝑊 ‘ 𝑖 ) , ( 𝑊 ‘ ( 𝑖 + 1 ) ) } ) ) ) |
| 57 | 56 | expdcom | ⊢ ( 𝑊 ∈ Word 𝑉 → ( ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) → ( ( ( 𝑁 ∈ ℕ0 ∧ 𝑊 ∈ Word ( Vtx ‘ 𝐺 ) ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ∧ 𝑍 ∈ 𝑉 ) → ( 𝑖 ∈ ( 0 ..^ 𝑁 ) → { ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ 𝑖 ) , ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ ( 𝑖 + 1 ) ) } = { ( 𝑊 ‘ 𝑖 ) , ( 𝑊 ‘ ( 𝑖 + 1 ) ) } ) ) ) ) |
| 58 | 57 | 3imp1 | ⊢ ( ( ( 𝑊 ∈ Word 𝑉 ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ∧ ( ( 𝑁 ∈ ℕ0 ∧ 𝑊 ∈ Word ( Vtx ‘ 𝐺 ) ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ∧ 𝑍 ∈ 𝑉 ) ) ∧ 𝑖 ∈ ( 0 ..^ 𝑁 ) ) → { ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ 𝑖 ) , ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ ( 𝑖 + 1 ) ) } = { ( 𝑊 ‘ 𝑖 ) , ( 𝑊 ‘ ( 𝑖 + 1 ) ) } ) |
| 59 | 58 | eleq1d | ⊢ ( ( ( 𝑊 ∈ Word 𝑉 ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ∧ ( ( 𝑁 ∈ ℕ0 ∧ 𝑊 ∈ Word ( Vtx ‘ 𝐺 ) ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ∧ 𝑍 ∈ 𝑉 ) ) ∧ 𝑖 ∈ ( 0 ..^ 𝑁 ) ) → ( { ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ 𝑖 ) , ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ ( 𝑖 + 1 ) ) } ∈ 𝐸 ↔ { ( 𝑊 ‘ 𝑖 ) , ( 𝑊 ‘ ( 𝑖 + 1 ) ) } ∈ 𝐸 ) ) |
| 60 | 59 | ralbidva | ⊢ ( ( 𝑊 ∈ Word 𝑉 ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ∧ ( ( 𝑁 ∈ ℕ0 ∧ 𝑊 ∈ Word ( Vtx ‘ 𝐺 ) ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ∧ 𝑍 ∈ 𝑉 ) ) → ( ∀ 𝑖 ∈ ( 0 ..^ 𝑁 ) { ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ 𝑖 ) , ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ ( 𝑖 + 1 ) ) } ∈ 𝐸 ↔ ∀ 𝑖 ∈ ( 0 ..^ 𝑁 ) { ( 𝑊 ‘ 𝑖 ) , ( 𝑊 ‘ ( 𝑖 + 1 ) ) } ∈ 𝐸 ) ) |
| 61 | 60 | biimprd | ⊢ ( ( 𝑊 ∈ Word 𝑉 ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ∧ ( ( 𝑁 ∈ ℕ0 ∧ 𝑊 ∈ Word ( Vtx ‘ 𝐺 ) ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ∧ 𝑍 ∈ 𝑉 ) ) → ( ∀ 𝑖 ∈ ( 0 ..^ 𝑁 ) { ( 𝑊 ‘ 𝑖 ) , ( 𝑊 ‘ ( 𝑖 + 1 ) ) } ∈ 𝐸 → ∀ 𝑖 ∈ ( 0 ..^ 𝑁 ) { ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ 𝑖 ) , ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ ( 𝑖 + 1 ) ) } ∈ 𝐸 ) ) |
| 62 | 61 | 3exp | ⊢ ( 𝑊 ∈ Word 𝑉 → ( ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) → ( ( ( 𝑁 ∈ ℕ0 ∧ 𝑊 ∈ Word ( Vtx ‘ 𝐺 ) ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ∧ 𝑍 ∈ 𝑉 ) → ( ∀ 𝑖 ∈ ( 0 ..^ 𝑁 ) { ( 𝑊 ‘ 𝑖 ) , ( 𝑊 ‘ ( 𝑖 + 1 ) ) } ∈ 𝐸 → ∀ 𝑖 ∈ ( 0 ..^ 𝑁 ) { ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ 𝑖 ) , ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ ( 𝑖 + 1 ) ) } ∈ 𝐸 ) ) ) ) |
| 63 | 62 | com34 | ⊢ ( 𝑊 ∈ Word 𝑉 → ( ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) → ( ∀ 𝑖 ∈ ( 0 ..^ 𝑁 ) { ( 𝑊 ‘ 𝑖 ) , ( 𝑊 ‘ ( 𝑖 + 1 ) ) } ∈ 𝐸 → ( ( ( 𝑁 ∈ ℕ0 ∧ 𝑊 ∈ Word ( Vtx ‘ 𝐺 ) ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ∧ 𝑍 ∈ 𝑉 ) → ∀ 𝑖 ∈ ( 0 ..^ 𝑁 ) { ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ 𝑖 ) , ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ ( 𝑖 + 1 ) ) } ∈ 𝐸 ) ) ) ) |
| 64 | 63 | 3imp1 | ⊢ ( ( ( 𝑊 ∈ Word 𝑉 ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ∧ ∀ 𝑖 ∈ ( 0 ..^ 𝑁 ) { ( 𝑊 ‘ 𝑖 ) , ( 𝑊 ‘ ( 𝑖 + 1 ) ) } ∈ 𝐸 ) ∧ ( ( 𝑁 ∈ ℕ0 ∧ 𝑊 ∈ Word ( Vtx ‘ 𝐺 ) ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ∧ 𝑍 ∈ 𝑉 ) ) → ∀ 𝑖 ∈ ( 0 ..^ 𝑁 ) { ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ 𝑖 ) , ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ ( 𝑖 + 1 ) ) } ∈ 𝐸 ) |
| 65 | 64 | adantr | ⊢ ( ( ( ( 𝑊 ∈ Word 𝑉 ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ∧ ∀ 𝑖 ∈ ( 0 ..^ 𝑁 ) { ( 𝑊 ‘ 𝑖 ) , ( 𝑊 ‘ ( 𝑖 + 1 ) ) } ∈ 𝐸 ) ∧ ( ( 𝑁 ∈ ℕ0 ∧ 𝑊 ∈ Word ( Vtx ‘ 𝐺 ) ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ∧ 𝑍 ∈ 𝑉 ) ) ∧ { ( lastS ‘ 𝑊 ) , 𝑍 } ∈ 𝐸 ) → ∀ 𝑖 ∈ ( 0 ..^ 𝑁 ) { ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ 𝑖 ) , ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ ( 𝑖 + 1 ) ) } ∈ 𝐸 ) |
| 66 | simpll | ⊢ ( ( ( 𝑊 ∈ Word 𝑉 ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ∧ ( 𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0 ) ) → 𝑊 ∈ Word 𝑉 ) | |
| 67 | 9 | ad2antrl | ⊢ ( ( ( 𝑊 ∈ Word 𝑉 ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ∧ ( 𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0 ) ) → 〈“ 𝑍 ”〉 ∈ Word 𝑉 ) |
| 68 | nn0p1gt0 | ⊢ ( 𝑁 ∈ ℕ0 → 0 < ( 𝑁 + 1 ) ) | |
| 69 | 68 | ad2antll | ⊢ ( ( ( 𝑊 ∈ Word 𝑉 ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ∧ ( 𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0 ) ) → 0 < ( 𝑁 + 1 ) ) |
| 70 | breq2 | ⊢ ( ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) → ( 0 < ( ♯ ‘ 𝑊 ) ↔ 0 < ( 𝑁 + 1 ) ) ) | |
| 71 | 70 | ad2antlr | ⊢ ( ( ( 𝑊 ∈ Word 𝑉 ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ∧ ( 𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0 ) ) → ( 0 < ( ♯ ‘ 𝑊 ) ↔ 0 < ( 𝑁 + 1 ) ) ) |
| 72 | 69 71 | mpbird | ⊢ ( ( ( 𝑊 ∈ Word 𝑉 ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ∧ ( 𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0 ) ) → 0 < ( ♯ ‘ 𝑊 ) ) |
| 73 | hashneq0 | ⊢ ( 𝑊 ∈ Word 𝑉 → ( 0 < ( ♯ ‘ 𝑊 ) ↔ 𝑊 ≠ ∅ ) ) | |
| 74 | 73 | ad2antrr | ⊢ ( ( ( 𝑊 ∈ Word 𝑉 ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ∧ ( 𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0 ) ) → ( 0 < ( ♯ ‘ 𝑊 ) ↔ 𝑊 ≠ ∅ ) ) |
| 75 | 72 74 | mpbid | ⊢ ( ( ( 𝑊 ∈ Word 𝑉 ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ∧ ( 𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0 ) ) → 𝑊 ≠ ∅ ) |
| 76 | ccatval1lsw | ⊢ ( ( 𝑊 ∈ Word 𝑉 ∧ 〈“ 𝑍 ”〉 ∈ Word 𝑉 ∧ 𝑊 ≠ ∅ ) → ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ ( ( ♯ ‘ 𝑊 ) − 1 ) ) = ( lastS ‘ 𝑊 ) ) | |
| 77 | 66 67 75 76 | syl3anc | ⊢ ( ( ( 𝑊 ∈ Word 𝑉 ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ∧ ( 𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0 ) ) → ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ ( ( ♯ ‘ 𝑊 ) − 1 ) ) = ( lastS ‘ 𝑊 ) ) |
| 78 | oveq1 | ⊢ ( ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) → ( ( ♯ ‘ 𝑊 ) − 1 ) = ( ( 𝑁 + 1 ) − 1 ) ) | |
| 79 | 78 | ad2antlr | ⊢ ( ( ( 𝑊 ∈ Word 𝑉 ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ∧ ( 𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0 ) ) → ( ( ♯ ‘ 𝑊 ) − 1 ) = ( ( 𝑁 + 1 ) − 1 ) ) |
| 80 | nn0cn | ⊢ ( 𝑁 ∈ ℕ0 → 𝑁 ∈ ℂ ) | |
| 81 | 80 | ad2antll | ⊢ ( ( ( 𝑊 ∈ Word 𝑉 ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ∧ ( 𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0 ) ) → 𝑁 ∈ ℂ ) |
| 82 | pncan1 | ⊢ ( 𝑁 ∈ ℂ → ( ( 𝑁 + 1 ) − 1 ) = 𝑁 ) | |
| 83 | 81 82 | syl | ⊢ ( ( ( 𝑊 ∈ Word 𝑉 ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ∧ ( 𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0 ) ) → ( ( 𝑁 + 1 ) − 1 ) = 𝑁 ) |
| 84 | 79 83 | eqtrd | ⊢ ( ( ( 𝑊 ∈ Word 𝑉 ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ∧ ( 𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0 ) ) → ( ( ♯ ‘ 𝑊 ) − 1 ) = 𝑁 ) |
| 85 | 84 | fveq2d | ⊢ ( ( ( 𝑊 ∈ Word 𝑉 ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ∧ ( 𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0 ) ) → ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ ( ( ♯ ‘ 𝑊 ) − 1 ) ) = ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ 𝑁 ) ) |
| 86 | 77 85 | eqtr3d | ⊢ ( ( ( 𝑊 ∈ Word 𝑉 ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ∧ ( 𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0 ) ) → ( lastS ‘ 𝑊 ) = ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ 𝑁 ) ) |
| 87 | ccatws1ls | ⊢ ( ( 𝑊 ∈ Word 𝑉 ∧ 𝑍 ∈ 𝑉 ) → ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ ( ♯ ‘ 𝑊 ) ) = 𝑍 ) | |
| 88 | 87 | ad2ant2r | ⊢ ( ( ( 𝑊 ∈ Word 𝑉 ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ∧ ( 𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0 ) ) → ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ ( ♯ ‘ 𝑊 ) ) = 𝑍 ) |
| 89 | fveq2 | ⊢ ( ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) → ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ ( ♯ ‘ 𝑊 ) ) = ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ ( 𝑁 + 1 ) ) ) | |
| 90 | 89 | ad2antlr | ⊢ ( ( ( 𝑊 ∈ Word 𝑉 ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ∧ ( 𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0 ) ) → ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ ( ♯ ‘ 𝑊 ) ) = ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ ( 𝑁 + 1 ) ) ) |
| 91 | 88 90 | eqtr3d | ⊢ ( ( ( 𝑊 ∈ Word 𝑉 ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ∧ ( 𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0 ) ) → 𝑍 = ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ ( 𝑁 + 1 ) ) ) |
| 92 | 86 91 | preq12d | ⊢ ( ( ( 𝑊 ∈ Word 𝑉 ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ∧ ( 𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0 ) ) → { ( lastS ‘ 𝑊 ) , 𝑍 } = { ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ 𝑁 ) , ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ ( 𝑁 + 1 ) ) } ) |
| 93 | 92 | expcom | ⊢ ( ( 𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0 ) → ( ( 𝑊 ∈ Word 𝑉 ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) → { ( lastS ‘ 𝑊 ) , 𝑍 } = { ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ 𝑁 ) , ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ ( 𝑁 + 1 ) ) } ) ) |
| 94 | 93 | expcom | ⊢ ( 𝑁 ∈ ℕ0 → ( 𝑍 ∈ 𝑉 → ( ( 𝑊 ∈ Word 𝑉 ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) → { ( lastS ‘ 𝑊 ) , 𝑍 } = { ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ 𝑁 ) , ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ ( 𝑁 + 1 ) ) } ) ) ) |
| 95 | 94 | 3ad2ant1 | ⊢ ( ( 𝑁 ∈ ℕ0 ∧ 𝑊 ∈ Word ( Vtx ‘ 𝐺 ) ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) → ( 𝑍 ∈ 𝑉 → ( ( 𝑊 ∈ Word 𝑉 ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) → { ( lastS ‘ 𝑊 ) , 𝑍 } = { ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ 𝑁 ) , ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ ( 𝑁 + 1 ) ) } ) ) ) |
| 96 | 95 | imp | ⊢ ( ( ( 𝑁 ∈ ℕ0 ∧ 𝑊 ∈ Word ( Vtx ‘ 𝐺 ) ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ∧ 𝑍 ∈ 𝑉 ) → ( ( 𝑊 ∈ Word 𝑉 ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) → { ( lastS ‘ 𝑊 ) , 𝑍 } = { ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ 𝑁 ) , ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ ( 𝑁 + 1 ) ) } ) ) |
| 97 | 96 | com12 | ⊢ ( ( 𝑊 ∈ Word 𝑉 ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) → ( ( ( 𝑁 ∈ ℕ0 ∧ 𝑊 ∈ Word ( Vtx ‘ 𝐺 ) ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ∧ 𝑍 ∈ 𝑉 ) → { ( lastS ‘ 𝑊 ) , 𝑍 } = { ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ 𝑁 ) , ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ ( 𝑁 + 1 ) ) } ) ) |
| 98 | 97 | 3adant3 | ⊢ ( ( 𝑊 ∈ Word 𝑉 ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ∧ ∀ 𝑖 ∈ ( 0 ..^ 𝑁 ) { ( 𝑊 ‘ 𝑖 ) , ( 𝑊 ‘ ( 𝑖 + 1 ) ) } ∈ 𝐸 ) → ( ( ( 𝑁 ∈ ℕ0 ∧ 𝑊 ∈ Word ( Vtx ‘ 𝐺 ) ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ∧ 𝑍 ∈ 𝑉 ) → { ( lastS ‘ 𝑊 ) , 𝑍 } = { ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ 𝑁 ) , ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ ( 𝑁 + 1 ) ) } ) ) |
| 99 | 98 | imp | ⊢ ( ( ( 𝑊 ∈ Word 𝑉 ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ∧ ∀ 𝑖 ∈ ( 0 ..^ 𝑁 ) { ( 𝑊 ‘ 𝑖 ) , ( 𝑊 ‘ ( 𝑖 + 1 ) ) } ∈ 𝐸 ) ∧ ( ( 𝑁 ∈ ℕ0 ∧ 𝑊 ∈ Word ( Vtx ‘ 𝐺 ) ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ∧ 𝑍 ∈ 𝑉 ) ) → { ( lastS ‘ 𝑊 ) , 𝑍 } = { ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ 𝑁 ) , ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ ( 𝑁 + 1 ) ) } ) |
| 100 | 99 | eleq1d | ⊢ ( ( ( 𝑊 ∈ Word 𝑉 ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ∧ ∀ 𝑖 ∈ ( 0 ..^ 𝑁 ) { ( 𝑊 ‘ 𝑖 ) , ( 𝑊 ‘ ( 𝑖 + 1 ) ) } ∈ 𝐸 ) ∧ ( ( 𝑁 ∈ ℕ0 ∧ 𝑊 ∈ Word ( Vtx ‘ 𝐺 ) ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ∧ 𝑍 ∈ 𝑉 ) ) → ( { ( lastS ‘ 𝑊 ) , 𝑍 } ∈ 𝐸 ↔ { ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ 𝑁 ) , ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ ( 𝑁 + 1 ) ) } ∈ 𝐸 ) ) |
| 101 | 100 | biimpa | ⊢ ( ( ( ( 𝑊 ∈ Word 𝑉 ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ∧ ∀ 𝑖 ∈ ( 0 ..^ 𝑁 ) { ( 𝑊 ‘ 𝑖 ) , ( 𝑊 ‘ ( 𝑖 + 1 ) ) } ∈ 𝐸 ) ∧ ( ( 𝑁 ∈ ℕ0 ∧ 𝑊 ∈ Word ( Vtx ‘ 𝐺 ) ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ∧ 𝑍 ∈ 𝑉 ) ) ∧ { ( lastS ‘ 𝑊 ) , 𝑍 } ∈ 𝐸 ) → { ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ 𝑁 ) , ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ ( 𝑁 + 1 ) ) } ∈ 𝐸 ) |
| 102 | simprl1 | ⊢ ( ( ( 𝑊 ∈ Word 𝑉 ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ∧ ∀ 𝑖 ∈ ( 0 ..^ 𝑁 ) { ( 𝑊 ‘ 𝑖 ) , ( 𝑊 ‘ ( 𝑖 + 1 ) ) } ∈ 𝐸 ) ∧ ( ( 𝑁 ∈ ℕ0 ∧ 𝑊 ∈ Word ( Vtx ‘ 𝐺 ) ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ∧ 𝑍 ∈ 𝑉 ) ) → 𝑁 ∈ ℕ0 ) | |
| 103 | 102 | adantr | ⊢ ( ( ( ( 𝑊 ∈ Word 𝑉 ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ∧ ∀ 𝑖 ∈ ( 0 ..^ 𝑁 ) { ( 𝑊 ‘ 𝑖 ) , ( 𝑊 ‘ ( 𝑖 + 1 ) ) } ∈ 𝐸 ) ∧ ( ( 𝑁 ∈ ℕ0 ∧ 𝑊 ∈ Word ( Vtx ‘ 𝐺 ) ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ∧ 𝑍 ∈ 𝑉 ) ) ∧ { ( lastS ‘ 𝑊 ) , 𝑍 } ∈ 𝐸 ) → 𝑁 ∈ ℕ0 ) |
| 104 | fveq2 | ⊢ ( 𝑖 = 𝑁 → ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ 𝑖 ) = ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ 𝑁 ) ) | |
| 105 | fvoveq1 | ⊢ ( 𝑖 = 𝑁 → ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ ( 𝑖 + 1 ) ) = ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ ( 𝑁 + 1 ) ) ) | |
| 106 | 104 105 | preq12d | ⊢ ( 𝑖 = 𝑁 → { ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ 𝑖 ) , ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ ( 𝑖 + 1 ) ) } = { ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ 𝑁 ) , ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ ( 𝑁 + 1 ) ) } ) |
| 107 | 106 | eleq1d | ⊢ ( 𝑖 = 𝑁 → ( { ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ 𝑖 ) , ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ ( 𝑖 + 1 ) ) } ∈ 𝐸 ↔ { ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ 𝑁 ) , ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ ( 𝑁 + 1 ) ) } ∈ 𝐸 ) ) |
| 108 | 107 | ralsng | ⊢ ( 𝑁 ∈ ℕ0 → ( ∀ 𝑖 ∈ { 𝑁 } { ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ 𝑖 ) , ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ ( 𝑖 + 1 ) ) } ∈ 𝐸 ↔ { ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ 𝑁 ) , ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ ( 𝑁 + 1 ) ) } ∈ 𝐸 ) ) |
| 109 | 103 108 | syl | ⊢ ( ( ( ( 𝑊 ∈ Word 𝑉 ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ∧ ∀ 𝑖 ∈ ( 0 ..^ 𝑁 ) { ( 𝑊 ‘ 𝑖 ) , ( 𝑊 ‘ ( 𝑖 + 1 ) ) } ∈ 𝐸 ) ∧ ( ( 𝑁 ∈ ℕ0 ∧ 𝑊 ∈ Word ( Vtx ‘ 𝐺 ) ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ∧ 𝑍 ∈ 𝑉 ) ) ∧ { ( lastS ‘ 𝑊 ) , 𝑍 } ∈ 𝐸 ) → ( ∀ 𝑖 ∈ { 𝑁 } { ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ 𝑖 ) , ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ ( 𝑖 + 1 ) ) } ∈ 𝐸 ↔ { ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ 𝑁 ) , ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ ( 𝑁 + 1 ) ) } ∈ 𝐸 ) ) |
| 110 | 101 109 | mpbird | ⊢ ( ( ( ( 𝑊 ∈ Word 𝑉 ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ∧ ∀ 𝑖 ∈ ( 0 ..^ 𝑁 ) { ( 𝑊 ‘ 𝑖 ) , ( 𝑊 ‘ ( 𝑖 + 1 ) ) } ∈ 𝐸 ) ∧ ( ( 𝑁 ∈ ℕ0 ∧ 𝑊 ∈ Word ( Vtx ‘ 𝐺 ) ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ∧ 𝑍 ∈ 𝑉 ) ) ∧ { ( lastS ‘ 𝑊 ) , 𝑍 } ∈ 𝐸 ) → ∀ 𝑖 ∈ { 𝑁 } { ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ 𝑖 ) , ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ ( 𝑖 + 1 ) ) } ∈ 𝐸 ) |
| 111 | ralunb | ⊢ ( ∀ 𝑖 ∈ ( ( 0 ..^ 𝑁 ) ∪ { 𝑁 } ) { ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ 𝑖 ) , ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ ( 𝑖 + 1 ) ) } ∈ 𝐸 ↔ ( ∀ 𝑖 ∈ ( 0 ..^ 𝑁 ) { ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ 𝑖 ) , ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ ( 𝑖 + 1 ) ) } ∈ 𝐸 ∧ ∀ 𝑖 ∈ { 𝑁 } { ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ 𝑖 ) , ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ ( 𝑖 + 1 ) ) } ∈ 𝐸 ) ) | |
| 112 | 65 110 111 | sylanbrc | ⊢ ( ( ( ( 𝑊 ∈ Word 𝑉 ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ∧ ∀ 𝑖 ∈ ( 0 ..^ 𝑁 ) { ( 𝑊 ‘ 𝑖 ) , ( 𝑊 ‘ ( 𝑖 + 1 ) ) } ∈ 𝐸 ) ∧ ( ( 𝑁 ∈ ℕ0 ∧ 𝑊 ∈ Word ( Vtx ‘ 𝐺 ) ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ∧ 𝑍 ∈ 𝑉 ) ) ∧ { ( lastS ‘ 𝑊 ) , 𝑍 } ∈ 𝐸 ) → ∀ 𝑖 ∈ ( ( 0 ..^ 𝑁 ) ∪ { 𝑁 } ) { ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ 𝑖 ) , ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ ( 𝑖 + 1 ) ) } ∈ 𝐸 ) |
| 113 | elnn0uz | ⊢ ( 𝑁 ∈ ℕ0 ↔ 𝑁 ∈ ( ℤ≥ ‘ 0 ) ) | |
| 114 | 102 113 | sylib | ⊢ ( ( ( 𝑊 ∈ Word 𝑉 ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ∧ ∀ 𝑖 ∈ ( 0 ..^ 𝑁 ) { ( 𝑊 ‘ 𝑖 ) , ( 𝑊 ‘ ( 𝑖 + 1 ) ) } ∈ 𝐸 ) ∧ ( ( 𝑁 ∈ ℕ0 ∧ 𝑊 ∈ Word ( Vtx ‘ 𝐺 ) ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ∧ 𝑍 ∈ 𝑉 ) ) → 𝑁 ∈ ( ℤ≥ ‘ 0 ) ) |
| 115 | 114 | adantr | ⊢ ( ( ( ( 𝑊 ∈ Word 𝑉 ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ∧ ∀ 𝑖 ∈ ( 0 ..^ 𝑁 ) { ( 𝑊 ‘ 𝑖 ) , ( 𝑊 ‘ ( 𝑖 + 1 ) ) } ∈ 𝐸 ) ∧ ( ( 𝑁 ∈ ℕ0 ∧ 𝑊 ∈ Word ( Vtx ‘ 𝐺 ) ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ∧ 𝑍 ∈ 𝑉 ) ) ∧ { ( lastS ‘ 𝑊 ) , 𝑍 } ∈ 𝐸 ) → 𝑁 ∈ ( ℤ≥ ‘ 0 ) ) |
| 116 | fzosplitsn | ⊢ ( 𝑁 ∈ ( ℤ≥ ‘ 0 ) → ( 0 ..^ ( 𝑁 + 1 ) ) = ( ( 0 ..^ 𝑁 ) ∪ { 𝑁 } ) ) | |
| 117 | 115 116 | syl | ⊢ ( ( ( ( 𝑊 ∈ Word 𝑉 ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ∧ ∀ 𝑖 ∈ ( 0 ..^ 𝑁 ) { ( 𝑊 ‘ 𝑖 ) , ( 𝑊 ‘ ( 𝑖 + 1 ) ) } ∈ 𝐸 ) ∧ ( ( 𝑁 ∈ ℕ0 ∧ 𝑊 ∈ Word ( Vtx ‘ 𝐺 ) ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ∧ 𝑍 ∈ 𝑉 ) ) ∧ { ( lastS ‘ 𝑊 ) , 𝑍 } ∈ 𝐸 ) → ( 0 ..^ ( 𝑁 + 1 ) ) = ( ( 0 ..^ 𝑁 ) ∪ { 𝑁 } ) ) |
| 118 | 112 117 | raleqtrrdv | ⊢ ( ( ( ( 𝑊 ∈ Word 𝑉 ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ∧ ∀ 𝑖 ∈ ( 0 ..^ 𝑁 ) { ( 𝑊 ‘ 𝑖 ) , ( 𝑊 ‘ ( 𝑖 + 1 ) ) } ∈ 𝐸 ) ∧ ( ( 𝑁 ∈ ℕ0 ∧ 𝑊 ∈ Word ( Vtx ‘ 𝐺 ) ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ∧ 𝑍 ∈ 𝑉 ) ) ∧ { ( lastS ‘ 𝑊 ) , 𝑍 } ∈ 𝐸 ) → ∀ 𝑖 ∈ ( 0 ..^ ( 𝑁 + 1 ) ) { ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ 𝑖 ) , ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ ( 𝑖 + 1 ) ) } ∈ 𝐸 ) |
| 119 | ccatws1len | ⊢ ( 𝑊 ∈ Word 𝑉 → ( ♯ ‘ ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ) = ( ( ♯ ‘ 𝑊 ) + 1 ) ) | |
| 120 | 119 | 3ad2ant1 | ⊢ ( ( 𝑊 ∈ Word 𝑉 ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ∧ ∀ 𝑖 ∈ ( 0 ..^ 𝑁 ) { ( 𝑊 ‘ 𝑖 ) , ( 𝑊 ‘ ( 𝑖 + 1 ) ) } ∈ 𝐸 ) → ( ♯ ‘ ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ) = ( ( ♯ ‘ 𝑊 ) + 1 ) ) |
| 121 | 120 | ad2antrr | ⊢ ( ( ( ( 𝑊 ∈ Word 𝑉 ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ∧ ∀ 𝑖 ∈ ( 0 ..^ 𝑁 ) { ( 𝑊 ‘ 𝑖 ) , ( 𝑊 ‘ ( 𝑖 + 1 ) ) } ∈ 𝐸 ) ∧ ( ( 𝑁 ∈ ℕ0 ∧ 𝑊 ∈ Word ( Vtx ‘ 𝐺 ) ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ∧ 𝑍 ∈ 𝑉 ) ) ∧ { ( lastS ‘ 𝑊 ) , 𝑍 } ∈ 𝐸 ) → ( ♯ ‘ ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ) = ( ( ♯ ‘ 𝑊 ) + 1 ) ) |
| 122 | 121 | oveq1d | ⊢ ( ( ( ( 𝑊 ∈ Word 𝑉 ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ∧ ∀ 𝑖 ∈ ( 0 ..^ 𝑁 ) { ( 𝑊 ‘ 𝑖 ) , ( 𝑊 ‘ ( 𝑖 + 1 ) ) } ∈ 𝐸 ) ∧ ( ( 𝑁 ∈ ℕ0 ∧ 𝑊 ∈ Word ( Vtx ‘ 𝐺 ) ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ∧ 𝑍 ∈ 𝑉 ) ) ∧ { ( lastS ‘ 𝑊 ) , 𝑍 } ∈ 𝐸 ) → ( ( ♯ ‘ ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ) − 1 ) = ( ( ( ♯ ‘ 𝑊 ) + 1 ) − 1 ) ) |
| 123 | oveq1 | ⊢ ( ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) → ( ( ♯ ‘ 𝑊 ) + 1 ) = ( ( 𝑁 + 1 ) + 1 ) ) | |
| 124 | 123 | oveq1d | ⊢ ( ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) → ( ( ( ♯ ‘ 𝑊 ) + 1 ) − 1 ) = ( ( ( 𝑁 + 1 ) + 1 ) − 1 ) ) |
| 125 | 1cnd | ⊢ ( 𝑁 ∈ ℕ0 → 1 ∈ ℂ ) | |
| 126 | 80 125 | addcld | ⊢ ( 𝑁 ∈ ℕ0 → ( 𝑁 + 1 ) ∈ ℂ ) |
| 127 | 126 125 | pncand | ⊢ ( 𝑁 ∈ ℕ0 → ( ( ( 𝑁 + 1 ) + 1 ) − 1 ) = ( 𝑁 + 1 ) ) |
| 128 | 127 | 3ad2ant1 | ⊢ ( ( 𝑁 ∈ ℕ0 ∧ 𝑊 ∈ Word ( Vtx ‘ 𝐺 ) ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) → ( ( ( 𝑁 + 1 ) + 1 ) − 1 ) = ( 𝑁 + 1 ) ) |
| 129 | 128 | adantr | ⊢ ( ( ( 𝑁 ∈ ℕ0 ∧ 𝑊 ∈ Word ( Vtx ‘ 𝐺 ) ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ∧ 𝑍 ∈ 𝑉 ) → ( ( ( 𝑁 + 1 ) + 1 ) − 1 ) = ( 𝑁 + 1 ) ) |
| 130 | 124 129 | sylan9eq | ⊢ ( ( ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ∧ ( ( 𝑁 ∈ ℕ0 ∧ 𝑊 ∈ Word ( Vtx ‘ 𝐺 ) ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ∧ 𝑍 ∈ 𝑉 ) ) → ( ( ( ♯ ‘ 𝑊 ) + 1 ) − 1 ) = ( 𝑁 + 1 ) ) |
| 131 | 130 | 3ad2antl2 | ⊢ ( ( ( 𝑊 ∈ Word 𝑉 ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ∧ ∀ 𝑖 ∈ ( 0 ..^ 𝑁 ) { ( 𝑊 ‘ 𝑖 ) , ( 𝑊 ‘ ( 𝑖 + 1 ) ) } ∈ 𝐸 ) ∧ ( ( 𝑁 ∈ ℕ0 ∧ 𝑊 ∈ Word ( Vtx ‘ 𝐺 ) ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ∧ 𝑍 ∈ 𝑉 ) ) → ( ( ( ♯ ‘ 𝑊 ) + 1 ) − 1 ) = ( 𝑁 + 1 ) ) |
| 132 | 131 | adantr | ⊢ ( ( ( ( 𝑊 ∈ Word 𝑉 ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ∧ ∀ 𝑖 ∈ ( 0 ..^ 𝑁 ) { ( 𝑊 ‘ 𝑖 ) , ( 𝑊 ‘ ( 𝑖 + 1 ) ) } ∈ 𝐸 ) ∧ ( ( 𝑁 ∈ ℕ0 ∧ 𝑊 ∈ Word ( Vtx ‘ 𝐺 ) ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ∧ 𝑍 ∈ 𝑉 ) ) ∧ { ( lastS ‘ 𝑊 ) , 𝑍 } ∈ 𝐸 ) → ( ( ( ♯ ‘ 𝑊 ) + 1 ) − 1 ) = ( 𝑁 + 1 ) ) |
| 133 | 122 132 | eqtrd | ⊢ ( ( ( ( 𝑊 ∈ Word 𝑉 ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ∧ ∀ 𝑖 ∈ ( 0 ..^ 𝑁 ) { ( 𝑊 ‘ 𝑖 ) , ( 𝑊 ‘ ( 𝑖 + 1 ) ) } ∈ 𝐸 ) ∧ ( ( 𝑁 ∈ ℕ0 ∧ 𝑊 ∈ Word ( Vtx ‘ 𝐺 ) ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ∧ 𝑍 ∈ 𝑉 ) ) ∧ { ( lastS ‘ 𝑊 ) , 𝑍 } ∈ 𝐸 ) → ( ( ♯ ‘ ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ) − 1 ) = ( 𝑁 + 1 ) ) |
| 134 | 133 | oveq2d | ⊢ ( ( ( ( 𝑊 ∈ Word 𝑉 ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ∧ ∀ 𝑖 ∈ ( 0 ..^ 𝑁 ) { ( 𝑊 ‘ 𝑖 ) , ( 𝑊 ‘ ( 𝑖 + 1 ) ) } ∈ 𝐸 ) ∧ ( ( 𝑁 ∈ ℕ0 ∧ 𝑊 ∈ Word ( Vtx ‘ 𝐺 ) ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ∧ 𝑍 ∈ 𝑉 ) ) ∧ { ( lastS ‘ 𝑊 ) , 𝑍 } ∈ 𝐸 ) → ( 0 ..^ ( ( ♯ ‘ ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ) − 1 ) ) = ( 0 ..^ ( 𝑁 + 1 ) ) ) |
| 135 | 118 134 | raleqtrrdv | ⊢ ( ( ( ( 𝑊 ∈ Word 𝑉 ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ∧ ∀ 𝑖 ∈ ( 0 ..^ 𝑁 ) { ( 𝑊 ‘ 𝑖 ) , ( 𝑊 ‘ ( 𝑖 + 1 ) ) } ∈ 𝐸 ) ∧ ( ( 𝑁 ∈ ℕ0 ∧ 𝑊 ∈ Word ( Vtx ‘ 𝐺 ) ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ∧ 𝑍 ∈ 𝑉 ) ) ∧ { ( lastS ‘ 𝑊 ) , 𝑍 } ∈ 𝐸 ) → ∀ 𝑖 ∈ ( 0 ..^ ( ( ♯ ‘ ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ) − 1 ) ) { ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ 𝑖 ) , ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ ( 𝑖 + 1 ) ) } ∈ 𝐸 ) |
| 136 | 135 | exp42 | ⊢ ( ( 𝑊 ∈ Word 𝑉 ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ∧ ∀ 𝑖 ∈ ( 0 ..^ 𝑁 ) { ( 𝑊 ‘ 𝑖 ) , ( 𝑊 ‘ ( 𝑖 + 1 ) ) } ∈ 𝐸 ) → ( ( 𝑁 ∈ ℕ0 ∧ 𝑊 ∈ Word ( Vtx ‘ 𝐺 ) ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) → ( 𝑍 ∈ 𝑉 → ( { ( lastS ‘ 𝑊 ) , 𝑍 } ∈ 𝐸 → ∀ 𝑖 ∈ ( 0 ..^ ( ( ♯ ‘ ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ) − 1 ) ) { ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ 𝑖 ) , ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ ( 𝑖 + 1 ) ) } ∈ 𝐸 ) ) ) ) |
| 137 | 14 136 | syl | ⊢ ( 𝑊 ∈ ( 𝑁 WWalksN 𝐺 ) → ( ( 𝑁 ∈ ℕ0 ∧ 𝑊 ∈ Word ( Vtx ‘ 𝐺 ) ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) → ( 𝑍 ∈ 𝑉 → ( { ( lastS ‘ 𝑊 ) , 𝑍 } ∈ 𝐸 → ∀ 𝑖 ∈ ( 0 ..^ ( ( ♯ ‘ ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ) − 1 ) ) { ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ 𝑖 ) , ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ ( 𝑖 + 1 ) ) } ∈ 𝐸 ) ) ) ) |
| 138 | 137 | imp41 | ⊢ ( ( ( ( 𝑊 ∈ ( 𝑁 WWalksN 𝐺 ) ∧ ( 𝑁 ∈ ℕ0 ∧ 𝑊 ∈ Word ( Vtx ‘ 𝐺 ) ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ) ∧ 𝑍 ∈ 𝑉 ) ∧ { ( lastS ‘ 𝑊 ) , 𝑍 } ∈ 𝐸 ) → ∀ 𝑖 ∈ ( 0 ..^ ( ( ♯ ‘ ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ) − 1 ) ) { ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ 𝑖 ) , ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ ( 𝑖 + 1 ) ) } ∈ 𝐸 ) |
| 139 | 138 | adantrr | ⊢ ( ( ( ( 𝑊 ∈ ( 𝑁 WWalksN 𝐺 ) ∧ ( 𝑁 ∈ ℕ0 ∧ 𝑊 ∈ Word ( Vtx ‘ 𝐺 ) ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ) ∧ 𝑍 ∈ 𝑉 ) ∧ ( { ( lastS ‘ 𝑊 ) , 𝑍 } ∈ 𝐸 ∧ { 𝑍 , ( 𝑊 ‘ 0 ) } ∈ 𝐸 ) ) → ∀ 𝑖 ∈ ( 0 ..^ ( ( ♯ ‘ ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ) − 1 ) ) { ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ 𝑖 ) , ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ ( 𝑖 + 1 ) ) } ∈ 𝐸 ) |
| 140 | lswccats1 | ⊢ ( ( 𝑊 ∈ Word 𝑉 ∧ 𝑍 ∈ 𝑉 ) → ( lastS ‘ ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ) = 𝑍 ) | |
| 141 | 8 140 | sylancom | ⊢ ( ( ( 𝑊 ∈ ( 𝑁 WWalksN 𝐺 ) ∧ ( 𝑁 ∈ ℕ0 ∧ 𝑊 ∈ Word ( Vtx ‘ 𝐺 ) ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ) ∧ 𝑍 ∈ 𝑉 ) → ( lastS ‘ ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ) = 𝑍 ) |
| 142 | 68 | 3ad2ant1 | ⊢ ( ( 𝑁 ∈ ℕ0 ∧ 𝑊 ∈ Word ( Vtx ‘ 𝐺 ) ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) → 0 < ( 𝑁 + 1 ) ) |
| 143 | 70 | 3ad2ant3 | ⊢ ( ( 𝑁 ∈ ℕ0 ∧ 𝑊 ∈ Word ( Vtx ‘ 𝐺 ) ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) → ( 0 < ( ♯ ‘ 𝑊 ) ↔ 0 < ( 𝑁 + 1 ) ) ) |
| 144 | 142 143 | mpbird | ⊢ ( ( 𝑁 ∈ ℕ0 ∧ 𝑊 ∈ Word ( Vtx ‘ 𝐺 ) ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) → 0 < ( ♯ ‘ 𝑊 ) ) |
| 145 | 144 | ad2antlr | ⊢ ( ( ( 𝑊 ∈ ( 𝑁 WWalksN 𝐺 ) ∧ ( 𝑁 ∈ ℕ0 ∧ 𝑊 ∈ Word ( Vtx ‘ 𝐺 ) ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ) ∧ 𝑍 ∈ 𝑉 ) → 0 < ( ♯ ‘ 𝑊 ) ) |
| 146 | ccatfv0 | ⊢ ( ( 𝑊 ∈ Word 𝑉 ∧ 〈“ 𝑍 ”〉 ∈ Word 𝑉 ∧ 0 < ( ♯ ‘ 𝑊 ) ) → ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ 0 ) = ( 𝑊 ‘ 0 ) ) | |
| 147 | 8 10 145 146 | syl3anc | ⊢ ( ( ( 𝑊 ∈ ( 𝑁 WWalksN 𝐺 ) ∧ ( 𝑁 ∈ ℕ0 ∧ 𝑊 ∈ Word ( Vtx ‘ 𝐺 ) ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ) ∧ 𝑍 ∈ 𝑉 ) → ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ 0 ) = ( 𝑊 ‘ 0 ) ) |
| 148 | 141 147 | preq12d | ⊢ ( ( ( 𝑊 ∈ ( 𝑁 WWalksN 𝐺 ) ∧ ( 𝑁 ∈ ℕ0 ∧ 𝑊 ∈ Word ( Vtx ‘ 𝐺 ) ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ) ∧ 𝑍 ∈ 𝑉 ) → { ( lastS ‘ ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ) , ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ 0 ) } = { 𝑍 , ( 𝑊 ‘ 0 ) } ) |
| 149 | 148 | eleq1d | ⊢ ( ( ( 𝑊 ∈ ( 𝑁 WWalksN 𝐺 ) ∧ ( 𝑁 ∈ ℕ0 ∧ 𝑊 ∈ Word ( Vtx ‘ 𝐺 ) ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ) ∧ 𝑍 ∈ 𝑉 ) → ( { ( lastS ‘ ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ) , ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ 0 ) } ∈ 𝐸 ↔ { 𝑍 , ( 𝑊 ‘ 0 ) } ∈ 𝐸 ) ) |
| 150 | 149 | biimprcd | ⊢ ( { 𝑍 , ( 𝑊 ‘ 0 ) } ∈ 𝐸 → ( ( ( 𝑊 ∈ ( 𝑁 WWalksN 𝐺 ) ∧ ( 𝑁 ∈ ℕ0 ∧ 𝑊 ∈ Word ( Vtx ‘ 𝐺 ) ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ) ∧ 𝑍 ∈ 𝑉 ) → { ( lastS ‘ ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ) , ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ 0 ) } ∈ 𝐸 ) ) |
| 151 | 150 | adantl | ⊢ ( ( { ( lastS ‘ 𝑊 ) , 𝑍 } ∈ 𝐸 ∧ { 𝑍 , ( 𝑊 ‘ 0 ) } ∈ 𝐸 ) → ( ( ( 𝑊 ∈ ( 𝑁 WWalksN 𝐺 ) ∧ ( 𝑁 ∈ ℕ0 ∧ 𝑊 ∈ Word ( Vtx ‘ 𝐺 ) ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ) ∧ 𝑍 ∈ 𝑉 ) → { ( lastS ‘ ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ) , ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ 0 ) } ∈ 𝐸 ) ) |
| 152 | 151 | impcom | ⊢ ( ( ( ( 𝑊 ∈ ( 𝑁 WWalksN 𝐺 ) ∧ ( 𝑁 ∈ ℕ0 ∧ 𝑊 ∈ Word ( Vtx ‘ 𝐺 ) ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ) ∧ 𝑍 ∈ 𝑉 ) ∧ ( { ( lastS ‘ 𝑊 ) , 𝑍 } ∈ 𝐸 ∧ { 𝑍 , ( 𝑊 ‘ 0 ) } ∈ 𝐸 ) ) → { ( lastS ‘ ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ) , ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ 0 ) } ∈ 𝐸 ) |
| 153 | 13 139 152 | 3jca | ⊢ ( ( ( ( 𝑊 ∈ ( 𝑁 WWalksN 𝐺 ) ∧ ( 𝑁 ∈ ℕ0 ∧ 𝑊 ∈ Word ( Vtx ‘ 𝐺 ) ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ) ∧ 𝑍 ∈ 𝑉 ) ∧ ( { ( lastS ‘ 𝑊 ) , 𝑍 } ∈ 𝐸 ∧ { 𝑍 , ( 𝑊 ‘ 0 ) } ∈ 𝐸 ) ) → ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ∈ Word 𝑉 ∧ ∀ 𝑖 ∈ ( 0 ..^ ( ( ♯ ‘ ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ) − 1 ) ) { ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ 𝑖 ) , ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ ( 𝑖 + 1 ) ) } ∈ 𝐸 ∧ { ( lastS ‘ ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ) , ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ 0 ) } ∈ 𝐸 ) ) |
| 154 | ccatws1len | ⊢ ( 𝑊 ∈ Word ( Vtx ‘ 𝐺 ) → ( ♯ ‘ ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ) = ( ( ♯ ‘ 𝑊 ) + 1 ) ) | |
| 155 | 154 | 3ad2ant2 | ⊢ ( ( 𝑁 ∈ ℕ0 ∧ 𝑊 ∈ Word ( Vtx ‘ 𝐺 ) ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) → ( ♯ ‘ ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ) = ( ( ♯ ‘ 𝑊 ) + 1 ) ) |
| 156 | 123 | 3ad2ant3 | ⊢ ( ( 𝑁 ∈ ℕ0 ∧ 𝑊 ∈ Word ( Vtx ‘ 𝐺 ) ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) → ( ( ♯ ‘ 𝑊 ) + 1 ) = ( ( 𝑁 + 1 ) + 1 ) ) |
| 157 | 80 125 125 | addassd | ⊢ ( 𝑁 ∈ ℕ0 → ( ( 𝑁 + 1 ) + 1 ) = ( 𝑁 + ( 1 + 1 ) ) ) |
| 158 | 1p1e2 | ⊢ ( 1 + 1 ) = 2 | |
| 159 | 158 | oveq2i | ⊢ ( 𝑁 + ( 1 + 1 ) ) = ( 𝑁 + 2 ) |
| 160 | 157 159 | eqtrdi | ⊢ ( 𝑁 ∈ ℕ0 → ( ( 𝑁 + 1 ) + 1 ) = ( 𝑁 + 2 ) ) |
| 161 | 160 | 3ad2ant1 | ⊢ ( ( 𝑁 ∈ ℕ0 ∧ 𝑊 ∈ Word ( Vtx ‘ 𝐺 ) ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) → ( ( 𝑁 + 1 ) + 1 ) = ( 𝑁 + 2 ) ) |
| 162 | 155 156 161 | 3eqtrd | ⊢ ( ( 𝑁 ∈ ℕ0 ∧ 𝑊 ∈ Word ( Vtx ‘ 𝐺 ) ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) → ( ♯ ‘ ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ) = ( 𝑁 + 2 ) ) |
| 163 | 162 | ad3antlr | ⊢ ( ( ( ( 𝑊 ∈ ( 𝑁 WWalksN 𝐺 ) ∧ ( 𝑁 ∈ ℕ0 ∧ 𝑊 ∈ Word ( Vtx ‘ 𝐺 ) ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ) ∧ 𝑍 ∈ 𝑉 ) ∧ ( { ( lastS ‘ 𝑊 ) , 𝑍 } ∈ 𝐸 ∧ { 𝑍 , ( 𝑊 ‘ 0 ) } ∈ 𝐸 ) ) → ( ♯ ‘ ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ) = ( 𝑁 + 2 ) ) |
| 164 | 2nn | ⊢ 2 ∈ ℕ | |
| 165 | nn0nnaddcl | ⊢ ( ( 𝑁 ∈ ℕ0 ∧ 2 ∈ ℕ ) → ( 𝑁 + 2 ) ∈ ℕ ) | |
| 166 | 164 165 | mpan2 | ⊢ ( 𝑁 ∈ ℕ0 → ( 𝑁 + 2 ) ∈ ℕ ) |
| 167 | 166 | 3ad2ant1 | ⊢ ( ( 𝑁 ∈ ℕ0 ∧ 𝑊 ∈ Word ( Vtx ‘ 𝐺 ) ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) → ( 𝑁 + 2 ) ∈ ℕ ) |
| 168 | 1 2 | isclwwlknx | ⊢ ( ( 𝑁 + 2 ) ∈ ℕ → ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ∈ ( ( 𝑁 + 2 ) ClWWalksN 𝐺 ) ↔ ( ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ∈ Word 𝑉 ∧ ∀ 𝑖 ∈ ( 0 ..^ ( ( ♯ ‘ ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ) − 1 ) ) { ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ 𝑖 ) , ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ ( 𝑖 + 1 ) ) } ∈ 𝐸 ∧ { ( lastS ‘ ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ) , ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ 0 ) } ∈ 𝐸 ) ∧ ( ♯ ‘ ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ) = ( 𝑁 + 2 ) ) ) ) |
| 169 | 167 168 | syl | ⊢ ( ( 𝑁 ∈ ℕ0 ∧ 𝑊 ∈ Word ( Vtx ‘ 𝐺 ) ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) → ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ∈ ( ( 𝑁 + 2 ) ClWWalksN 𝐺 ) ↔ ( ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ∈ Word 𝑉 ∧ ∀ 𝑖 ∈ ( 0 ..^ ( ( ♯ ‘ ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ) − 1 ) ) { ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ 𝑖 ) , ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ ( 𝑖 + 1 ) ) } ∈ 𝐸 ∧ { ( lastS ‘ ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ) , ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ 0 ) } ∈ 𝐸 ) ∧ ( ♯ ‘ ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ) = ( 𝑁 + 2 ) ) ) ) |
| 170 | 169 | ad3antlr | ⊢ ( ( ( ( 𝑊 ∈ ( 𝑁 WWalksN 𝐺 ) ∧ ( 𝑁 ∈ ℕ0 ∧ 𝑊 ∈ Word ( Vtx ‘ 𝐺 ) ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ) ∧ 𝑍 ∈ 𝑉 ) ∧ ( { ( lastS ‘ 𝑊 ) , 𝑍 } ∈ 𝐸 ∧ { 𝑍 , ( 𝑊 ‘ 0 ) } ∈ 𝐸 ) ) → ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ∈ ( ( 𝑁 + 2 ) ClWWalksN 𝐺 ) ↔ ( ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ∈ Word 𝑉 ∧ ∀ 𝑖 ∈ ( 0 ..^ ( ( ♯ ‘ ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ) − 1 ) ) { ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ 𝑖 ) , ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ ( 𝑖 + 1 ) ) } ∈ 𝐸 ∧ { ( lastS ‘ ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ) , ( ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ‘ 0 ) } ∈ 𝐸 ) ∧ ( ♯ ‘ ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ) = ( 𝑁 + 2 ) ) ) ) |
| 171 | 153 163 170 | mpbir2and | ⊢ ( ( ( ( 𝑊 ∈ ( 𝑁 WWalksN 𝐺 ) ∧ ( 𝑁 ∈ ℕ0 ∧ 𝑊 ∈ Word ( Vtx ‘ 𝐺 ) ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ) ∧ 𝑍 ∈ 𝑉 ) ∧ ( { ( lastS ‘ 𝑊 ) , 𝑍 } ∈ 𝐸 ∧ { 𝑍 , ( 𝑊 ‘ 0 ) } ∈ 𝐸 ) ) → ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ∈ ( ( 𝑁 + 2 ) ClWWalksN 𝐺 ) ) |
| 172 | 171 | exp31 | ⊢ ( ( 𝑊 ∈ ( 𝑁 WWalksN 𝐺 ) ∧ ( 𝑁 ∈ ℕ0 ∧ 𝑊 ∈ Word ( Vtx ‘ 𝐺 ) ∧ ( ♯ ‘ 𝑊 ) = ( 𝑁 + 1 ) ) ) → ( 𝑍 ∈ 𝑉 → ( ( { ( lastS ‘ 𝑊 ) , 𝑍 } ∈ 𝐸 ∧ { 𝑍 , ( 𝑊 ‘ 0 ) } ∈ 𝐸 ) → ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ∈ ( ( 𝑁 + 2 ) ClWWalksN 𝐺 ) ) ) ) |
| 173 | 3 172 | mpdan | ⊢ ( 𝑊 ∈ ( 𝑁 WWalksN 𝐺 ) → ( 𝑍 ∈ 𝑉 → ( ( { ( lastS ‘ 𝑊 ) , 𝑍 } ∈ 𝐸 ∧ { 𝑍 , ( 𝑊 ‘ 0 ) } ∈ 𝐸 ) → ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ∈ ( ( 𝑁 + 2 ) ClWWalksN 𝐺 ) ) ) ) |
| 174 | 173 | imp | ⊢ ( ( 𝑊 ∈ ( 𝑁 WWalksN 𝐺 ) ∧ 𝑍 ∈ 𝑉 ) → ( ( { ( lastS ‘ 𝑊 ) , 𝑍 } ∈ 𝐸 ∧ { 𝑍 , ( 𝑊 ‘ 0 ) } ∈ 𝐸 ) → ( 𝑊 ++ 〈“ 𝑍 ”〉 ) ∈ ( ( 𝑁 + 2 ) ClWWalksN 𝐺 ) ) ) |