Metamath Proof Explorer

Theorem cgrextend

Description: Link congruence over a pair of line segments. Theorem 2.11 of Schwabhauser p. 29. (Contributed by Scott Fenton, 12-Jun-2013)

Ref Expression
Assertion cgrextend ( ( 𝑁 ∈ ℕ ∧ ( 𝐴 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐵 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐶 ∈ ( 𝔼 ‘ 𝑁 ) ) ∧ ( 𝐷 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐸 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐹 ∈ ( 𝔼 ‘ 𝑁 ) ) ) → ( ( ( 𝐵 Btwn ⟨ 𝐴 , 𝐶 ⟩ ∧ 𝐸 Btwn ⟨ 𝐷 , 𝐹 ⟩ ) ∧ ( ⟨ 𝐴 , 𝐵 ⟩ Cgr ⟨ 𝐷 , 𝐸 ⟩ ∧ ⟨ 𝐵 , 𝐶 ⟩ Cgr ⟨ 𝐸 , 𝐹 ⟩ ) ) → ⟨ 𝐴 , 𝐶 ⟩ Cgr ⟨ 𝐷 , 𝐹 ⟩ ) )

Proof

Step Hyp Ref Expression
1 opeq1 ⊢ ( 𝐴 = 𝐵 → ⟨ 𝐴 , 𝐵 ⟩ = ⟨ 𝐵 , 𝐵 ⟩ )
2 1 breq1d ⊢ ( 𝐴 = 𝐵 → ( ⟨ 𝐴 , 𝐵 ⟩ Cgr ⟨ 𝐷 , 𝐸 ⟩ ↔ ⟨ 𝐵 , 𝐵 ⟩ Cgr ⟨ 𝐷 , 𝐸 ⟩ ) )
3 2 adantr ⊢ ( ( 𝐴 = 𝐵 ∧ ( 𝑁 ∈ ℕ ∧ ( 𝐴 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐵 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐶 ∈ ( 𝔼 ‘ 𝑁 ) ) ∧ ( 𝐷 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐸 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐹 ∈ ( 𝔼 ‘ 𝑁 ) ) ) ) → ( ⟨ 𝐴 , 𝐵 ⟩ Cgr ⟨ 𝐷 , 𝐸 ⟩ ↔ ⟨ 𝐵 , 𝐵 ⟩ Cgr ⟨ 𝐷 , 𝐸 ⟩ ) )
4 simp1 ⊢ ( ( 𝑁 ∈ ℕ ∧ ( 𝐴 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐵 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐶 ∈ ( 𝔼 ‘ 𝑁 ) ) ∧ ( 𝐷 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐸 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐹 ∈ ( 𝔼 ‘ 𝑁 ) ) ) → 𝑁 ∈ ℕ )
5 simp22 ⊢ ( ( 𝑁 ∈ ℕ ∧ ( 𝐴 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐵 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐶 ∈ ( 𝔼 ‘ 𝑁 ) ) ∧ ( 𝐷 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐸 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐹 ∈ ( 𝔼 ‘ 𝑁 ) ) ) → 𝐵 ∈ ( 𝔼 ‘ 𝑁 ) )
6 simp31 ⊢ ( ( 𝑁 ∈ ℕ ∧ ( 𝐴 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐵 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐶 ∈ ( 𝔼 ‘ 𝑁 ) ) ∧ ( 𝐷 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐸 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐹 ∈ ( 𝔼 ‘ 𝑁 ) ) ) → 𝐷 ∈ ( 𝔼 ‘ 𝑁 ) )
7 simp32 ⊢ ( ( 𝑁 ∈ ℕ ∧ ( 𝐴 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐵 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐶 ∈ ( 𝔼 ‘ 𝑁 ) ) ∧ ( 𝐷 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐸 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐹 ∈ ( 𝔼 ‘ 𝑁 ) ) ) → 𝐸 ∈ ( 𝔼 ‘ 𝑁 ) )
8 cgrid2 ⊢ ( ( 𝑁 ∈ ℕ ∧ ( 𝐵 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐷 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐸 ∈ ( 𝔼 ‘ 𝑁 ) ) ) → ( ⟨ 𝐵 , 𝐵 ⟩ Cgr ⟨ 𝐷 , 𝐸 ⟩ → 𝐷 = 𝐸 ) )
9 4 5 6 7 8 syl13anc ⊢ ( ( 𝑁 ∈ ℕ ∧ ( 𝐴 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐵 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐶 ∈ ( 𝔼 ‘ 𝑁 ) ) ∧ ( 𝐷 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐸 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐹 ∈ ( 𝔼 ‘ 𝑁 ) ) ) → ( ⟨ 𝐵 , 𝐵 ⟩ Cgr ⟨ 𝐷 , 𝐸 ⟩ → 𝐷 = 𝐸 ) )
10 9 adantl ⊢ ( ( 𝐴 = 𝐵 ∧ ( 𝑁 ∈ ℕ ∧ ( 𝐴 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐵 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐶 ∈ ( 𝔼 ‘ 𝑁 ) ) ∧ ( 𝐷 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐸 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐹 ∈ ( 𝔼 ‘ 𝑁 ) ) ) ) → ( ⟨ 𝐵 , 𝐵 ⟩ Cgr ⟨ 𝐷 , 𝐸 ⟩ → 𝐷 = 𝐸 ) )
11 3 10 sylbid ⊢ ( ( 𝐴 = 𝐵 ∧ ( 𝑁 ∈ ℕ ∧ ( 𝐴 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐵 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐶 ∈ ( 𝔼 ‘ 𝑁 ) ) ∧ ( 𝐷 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐸 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐹 ∈ ( 𝔼 ‘ 𝑁 ) ) ) ) → ( ⟨ 𝐴 , 𝐵 ⟩ Cgr ⟨ 𝐷 , 𝐸 ⟩ → 𝐷 = 𝐸 ) )
12 opeq1 ⊢ ( 𝐴 = 𝐵 → ⟨ 𝐴 , 𝐶 ⟩ = ⟨ 𝐵 , 𝐶 ⟩ )
13 opeq1 ⊢ ( 𝐷 = 𝐸 → ⟨ 𝐷 , 𝐹 ⟩ = ⟨ 𝐸 , 𝐹 ⟩ )
14 12 13 breqan12d ⊢ ( ( 𝐴 = 𝐵 ∧ 𝐷 = 𝐸 ) → ( ⟨ 𝐴 , 𝐶 ⟩ Cgr ⟨ 𝐷 , 𝐹 ⟩ ↔ ⟨ 𝐵 , 𝐶 ⟩ Cgr ⟨ 𝐸 , 𝐹 ⟩ ) )
15 14 exbiri ⊢ ( 𝐴 = 𝐵 → ( 𝐷 = 𝐸 → ( ⟨ 𝐵 , 𝐶 ⟩ Cgr ⟨ 𝐸 , 𝐹 ⟩ → ⟨ 𝐴 , 𝐶 ⟩ Cgr ⟨ 𝐷 , 𝐹 ⟩ ) ) )
16 15 adantr ⊢ ( ( 𝐴 = 𝐵 ∧ ( 𝑁 ∈ ℕ ∧ ( 𝐴 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐵 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐶 ∈ ( 𝔼 ‘ 𝑁 ) ) ∧ ( 𝐷 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐸 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐹 ∈ ( 𝔼 ‘ 𝑁 ) ) ) ) → ( 𝐷 = 𝐸 → ( ⟨ 𝐵 , 𝐶 ⟩ Cgr ⟨ 𝐸 , 𝐹 ⟩ → ⟨ 𝐴 , 𝐶 ⟩ Cgr ⟨ 𝐷 , 𝐹 ⟩ ) ) )
17 11 16 syld ⊢ ( ( 𝐴 = 𝐵 ∧ ( 𝑁 ∈ ℕ ∧ ( 𝐴 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐵 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐶 ∈ ( 𝔼 ‘ 𝑁 ) ) ∧ ( 𝐷 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐸 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐹 ∈ ( 𝔼 ‘ 𝑁 ) ) ) ) → ( ⟨ 𝐴 , 𝐵 ⟩ Cgr ⟨ 𝐷 , 𝐸 ⟩ → ( ⟨ 𝐵 , 𝐶 ⟩ Cgr ⟨ 𝐸 , 𝐹 ⟩ → ⟨ 𝐴 , 𝐶 ⟩ Cgr ⟨ 𝐷 , 𝐹 ⟩ ) ) )
18 17 impd ⊢ ( ( 𝐴 = 𝐵 ∧ ( 𝑁 ∈ ℕ ∧ ( 𝐴 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐵 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐶 ∈ ( 𝔼 ‘ 𝑁 ) ) ∧ ( 𝐷 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐸 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐹 ∈ ( 𝔼 ‘ 𝑁 ) ) ) ) → ( ( ⟨ 𝐴 , 𝐵 ⟩ Cgr ⟨ 𝐷 , 𝐸 ⟩ ∧ ⟨ 𝐵 , 𝐶 ⟩ Cgr ⟨ 𝐸 , 𝐹 ⟩ ) → ⟨ 𝐴 , 𝐶 ⟩ Cgr ⟨ 𝐷 , 𝐹 ⟩ ) )
19 18 adantld ⊢ ( ( 𝐴 = 𝐵 ∧ ( 𝑁 ∈ ℕ ∧ ( 𝐴 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐵 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐶 ∈ ( 𝔼 ‘ 𝑁 ) ) ∧ ( 𝐷 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐸 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐹 ∈ ( 𝔼 ‘ 𝑁 ) ) ) ) → ( ( ( 𝐵 Btwn ⟨ 𝐴 , 𝐶 ⟩ ∧ 𝐸 Btwn ⟨ 𝐷 , 𝐹 ⟩ ) ∧ ( ⟨ 𝐴 , 𝐵 ⟩ Cgr ⟨ 𝐷 , 𝐸 ⟩ ∧ ⟨ 𝐵 , 𝐶 ⟩ Cgr ⟨ 𝐸 , 𝐹 ⟩ ) ) → ⟨ 𝐴 , 𝐶 ⟩ Cgr ⟨ 𝐷 , 𝐹 ⟩ ) )
20 19 ex ⊢ ( 𝐴 = 𝐵 → ( ( 𝑁 ∈ ℕ ∧ ( 𝐴 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐵 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐶 ∈ ( 𝔼 ‘ 𝑁 ) ) ∧ ( 𝐷 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐸 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐹 ∈ ( 𝔼 ‘ 𝑁 ) ) ) → ( ( ( 𝐵 Btwn ⟨ 𝐴 , 𝐶 ⟩ ∧ 𝐸 Btwn ⟨ 𝐷 , 𝐹 ⟩ ) ∧ ( ⟨ 𝐴 , 𝐵 ⟩ Cgr ⟨ 𝐷 , 𝐸 ⟩ ∧ ⟨ 𝐵 , 𝐶 ⟩ Cgr ⟨ 𝐸 , 𝐹 ⟩ ) ) → ⟨ 𝐴 , 𝐶 ⟩ Cgr ⟨ 𝐷 , 𝐹 ⟩ ) ) )
21 simpl1 ⊢ ( ( ( 𝑁 ∈ ℕ ∧ ( 𝐴 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐵 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐶 ∈ ( 𝔼 ‘ 𝑁 ) ) ∧ ( 𝐷 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐸 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐹 ∈ ( 𝔼 ‘ 𝑁 ) ) ) ∧ ( 𝐴 ≠ 𝐵 ∧ ( ( 𝐵 Btwn ⟨ 𝐴 , 𝐶 ⟩ ∧ 𝐸 Btwn ⟨ 𝐷 , 𝐹 ⟩ ) ∧ ( ⟨ 𝐴 , 𝐵 ⟩ Cgr ⟨ 𝐷 , 𝐸 ⟩ ∧ ⟨ 𝐵 , 𝐶 ⟩ Cgr ⟨ 𝐸 , 𝐹 ⟩ ) ) ) ) → 𝑁 ∈ ℕ )
22 simpl21 ⊢ ( ( ( 𝑁 ∈ ℕ ∧ ( 𝐴 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐵 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐶 ∈ ( 𝔼 ‘ 𝑁 ) ) ∧ ( 𝐷 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐸 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐹 ∈ ( 𝔼 ‘ 𝑁 ) ) ) ∧ ( 𝐴 ≠ 𝐵 ∧ ( ( 𝐵 Btwn ⟨ 𝐴 , 𝐶 ⟩ ∧ 𝐸 Btwn ⟨ 𝐷 , 𝐹 ⟩ ) ∧ ( ⟨ 𝐴 , 𝐵 ⟩ Cgr ⟨ 𝐷 , 𝐸 ⟩ ∧ ⟨ 𝐵 , 𝐶 ⟩ Cgr ⟨ 𝐸 , 𝐹 ⟩ ) ) ) ) → 𝐴 ∈ ( 𝔼 ‘ 𝑁 ) )
23 simpl22 ⊢ ( ( ( 𝑁 ∈ ℕ ∧ ( 𝐴 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐵 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐶 ∈ ( 𝔼 ‘ 𝑁 ) ) ∧ ( 𝐷 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐸 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐹 ∈ ( 𝔼 ‘ 𝑁 ) ) ) ∧ ( 𝐴 ≠ 𝐵 ∧ ( ( 𝐵 Btwn ⟨ 𝐴 , 𝐶 ⟩ ∧ 𝐸 Btwn ⟨ 𝐷 , 𝐹 ⟩ ) ∧ ( ⟨ 𝐴 , 𝐵 ⟩ Cgr ⟨ 𝐷 , 𝐸 ⟩ ∧ ⟨ 𝐵 , 𝐶 ⟩ Cgr ⟨ 𝐸 , 𝐹 ⟩ ) ) ) ) → 𝐵 ∈ ( 𝔼 ‘ 𝑁 ) )
24 21 22 23 3jca ⊢ ( ( ( 𝑁 ∈ ℕ ∧ ( 𝐴 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐵 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐶 ∈ ( 𝔼 ‘ 𝑁 ) ) ∧ ( 𝐷 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐸 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐹 ∈ ( 𝔼 ‘ 𝑁 ) ) ) ∧ ( 𝐴 ≠ 𝐵 ∧ ( ( 𝐵 Btwn ⟨ 𝐴 , 𝐶 ⟩ ∧ 𝐸 Btwn ⟨ 𝐷 , 𝐹 ⟩ ) ∧ ( ⟨ 𝐴 , 𝐵 ⟩ Cgr ⟨ 𝐷 , 𝐸 ⟩ ∧ ⟨ 𝐵 , 𝐶 ⟩ Cgr ⟨ 𝐸 , 𝐹 ⟩ ) ) ) ) → ( 𝑁 ∈ ℕ ∧ 𝐴 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐵 ∈ ( 𝔼 ‘ 𝑁 ) ) )
25 simpl23 ⊢ ( ( ( 𝑁 ∈ ℕ ∧ ( 𝐴 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐵 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐶 ∈ ( 𝔼 ‘ 𝑁 ) ) ∧ ( 𝐷 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐸 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐹 ∈ ( 𝔼 ‘ 𝑁 ) ) ) ∧ ( 𝐴 ≠ 𝐵 ∧ ( ( 𝐵 Btwn ⟨ 𝐴 , 𝐶 ⟩ ∧ 𝐸 Btwn ⟨ 𝐷 , 𝐹 ⟩ ) ∧ ( ⟨ 𝐴 , 𝐵 ⟩ Cgr ⟨ 𝐷 , 𝐸 ⟩ ∧ ⟨ 𝐵 , 𝐶 ⟩ Cgr ⟨ 𝐸 , 𝐹 ⟩ ) ) ) ) → 𝐶 ∈ ( 𝔼 ‘ 𝑁 ) )
26 simpl31 ⊢ ( ( ( 𝑁 ∈ ℕ ∧ ( 𝐴 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐵 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐶 ∈ ( 𝔼 ‘ 𝑁 ) ) ∧ ( 𝐷 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐸 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐹 ∈ ( 𝔼 ‘ 𝑁 ) ) ) ∧ ( 𝐴 ≠ 𝐵 ∧ ( ( 𝐵 Btwn ⟨ 𝐴 , 𝐶 ⟩ ∧ 𝐸 Btwn ⟨ 𝐷 , 𝐹 ⟩ ) ∧ ( ⟨ 𝐴 , 𝐵 ⟩ Cgr ⟨ 𝐷 , 𝐸 ⟩ ∧ ⟨ 𝐵 , 𝐶 ⟩ Cgr ⟨ 𝐸 , 𝐹 ⟩ ) ) ) ) → 𝐷 ∈ ( 𝔼 ‘ 𝑁 ) )
27 25 22 26 3jca ⊢ ( ( ( 𝑁 ∈ ℕ ∧ ( 𝐴 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐵 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐶 ∈ ( 𝔼 ‘ 𝑁 ) ) ∧ ( 𝐷 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐸 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐹 ∈ ( 𝔼 ‘ 𝑁 ) ) ) ∧ ( 𝐴 ≠ 𝐵 ∧ ( ( 𝐵 Btwn ⟨ 𝐴 , 𝐶 ⟩ ∧ 𝐸 Btwn ⟨ 𝐷 , 𝐹 ⟩ ) ∧ ( ⟨ 𝐴 , 𝐵 ⟩ Cgr ⟨ 𝐷 , 𝐸 ⟩ ∧ ⟨ 𝐵 , 𝐶 ⟩ Cgr ⟨ 𝐸 , 𝐹 ⟩ ) ) ) ) → ( 𝐶 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐴 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐷 ∈ ( 𝔼 ‘ 𝑁 ) ) )
28 simpl32 ⊢ ( ( ( 𝑁 ∈ ℕ ∧ ( 𝐴 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐵 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐶 ∈ ( 𝔼 ‘ 𝑁 ) ) ∧ ( 𝐷 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐸 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐹 ∈ ( 𝔼 ‘ 𝑁 ) ) ) ∧ ( 𝐴 ≠ 𝐵 ∧ ( ( 𝐵 Btwn ⟨ 𝐴 , 𝐶 ⟩ ∧ 𝐸 Btwn ⟨ 𝐷 , 𝐹 ⟩ ) ∧ ( ⟨ 𝐴 , 𝐵 ⟩ Cgr ⟨ 𝐷 , 𝐸 ⟩ ∧ ⟨ 𝐵 , 𝐶 ⟩ Cgr ⟨ 𝐸 , 𝐹 ⟩ ) ) ) ) → 𝐸 ∈ ( 𝔼 ‘ 𝑁 ) )
29 simpl33 ⊢ ( ( ( 𝑁 ∈ ℕ ∧ ( 𝐴 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐵 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐶 ∈ ( 𝔼 ‘ 𝑁 ) ) ∧ ( 𝐷 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐸 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐹 ∈ ( 𝔼 ‘ 𝑁 ) ) ) ∧ ( 𝐴 ≠ 𝐵 ∧ ( ( 𝐵 Btwn ⟨ 𝐴 , 𝐶 ⟩ ∧ 𝐸 Btwn ⟨ 𝐷 , 𝐹 ⟩ ) ∧ ( ⟨ 𝐴 , 𝐵 ⟩ Cgr ⟨ 𝐷 , 𝐸 ⟩ ∧ ⟨ 𝐵 , 𝐶 ⟩ Cgr ⟨ 𝐸 , 𝐹 ⟩ ) ) ) ) → 𝐹 ∈ ( 𝔼 ‘ 𝑁 ) )
30 28 29 26 3jca ⊢ ( ( ( 𝑁 ∈ ℕ ∧ ( 𝐴 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐵 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐶 ∈ ( 𝔼 ‘ 𝑁 ) ) ∧ ( 𝐷 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐸 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐹 ∈ ( 𝔼 ‘ 𝑁 ) ) ) ∧ ( 𝐴 ≠ 𝐵 ∧ ( ( 𝐵 Btwn ⟨ 𝐴 , 𝐶 ⟩ ∧ 𝐸 Btwn ⟨ 𝐷 , 𝐹 ⟩ ) ∧ ( ⟨ 𝐴 , 𝐵 ⟩ Cgr ⟨ 𝐷 , 𝐸 ⟩ ∧ ⟨ 𝐵 , 𝐶 ⟩ Cgr ⟨ 𝐸 , 𝐹 ⟩ ) ) ) ) → ( 𝐸 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐹 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐷 ∈ ( 𝔼 ‘ 𝑁 ) ) )
31 24 27 30 3jca ⊢ ( ( ( 𝑁 ∈ ℕ ∧ ( 𝐴 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐵 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐶 ∈ ( 𝔼 ‘ 𝑁 ) ) ∧ ( 𝐷 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐸 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐹 ∈ ( 𝔼 ‘ 𝑁 ) ) ) ∧ ( 𝐴 ≠ 𝐵 ∧ ( ( 𝐵 Btwn ⟨ 𝐴 , 𝐶 ⟩ ∧ 𝐸 Btwn ⟨ 𝐷 , 𝐹 ⟩ ) ∧ ( ⟨ 𝐴 , 𝐵 ⟩ Cgr ⟨ 𝐷 , 𝐸 ⟩ ∧ ⟨ 𝐵 , 𝐶 ⟩ Cgr ⟨ 𝐸 , 𝐹 ⟩ ) ) ) ) → ( ( 𝑁 ∈ ℕ ∧ 𝐴 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐵 ∈ ( 𝔼 ‘ 𝑁 ) ) ∧ ( 𝐶 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐴 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐷 ∈ ( 𝔼 ‘ 𝑁 ) ) ∧ ( 𝐸 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐹 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐷 ∈ ( 𝔼 ‘ 𝑁 ) ) ) )
32 simprrl ⊢ ( ( ( 𝑁 ∈ ℕ ∧ ( 𝐴 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐵 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐶 ∈ ( 𝔼 ‘ 𝑁 ) ) ∧ ( 𝐷 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐸 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐹 ∈ ( 𝔼 ‘ 𝑁 ) ) ) ∧ ( 𝐴 ≠ 𝐵 ∧ ( ( 𝐵 Btwn ⟨ 𝐴 , 𝐶 ⟩ ∧ 𝐸 Btwn ⟨ 𝐷 , 𝐹 ⟩ ) ∧ ( ⟨ 𝐴 , 𝐵 ⟩ Cgr ⟨ 𝐷 , 𝐸 ⟩ ∧ ⟨ 𝐵 , 𝐶 ⟩ Cgr ⟨ 𝐸 , 𝐹 ⟩ ) ) ) ) → ( 𝐵 Btwn ⟨ 𝐴 , 𝐶 ⟩ ∧ 𝐸 Btwn ⟨ 𝐷 , 𝐹 ⟩ ) )
33 simprrr ⊢ ( ( ( 𝑁 ∈ ℕ ∧ ( 𝐴 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐵 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐶 ∈ ( 𝔼 ‘ 𝑁 ) ) ∧ ( 𝐷 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐸 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐹 ∈ ( 𝔼 ‘ 𝑁 ) ) ) ∧ ( 𝐴 ≠ 𝐵 ∧ ( ( 𝐵 Btwn ⟨ 𝐴 , 𝐶 ⟩ ∧ 𝐸 Btwn ⟨ 𝐷 , 𝐹 ⟩ ) ∧ ( ⟨ 𝐴 , 𝐵 ⟩ Cgr ⟨ 𝐷 , 𝐸 ⟩ ∧ ⟨ 𝐵 , 𝐶 ⟩ Cgr ⟨ 𝐸 , 𝐹 ⟩ ) ) ) ) → ( ⟨ 𝐴 , 𝐵 ⟩ Cgr ⟨ 𝐷 , 𝐸 ⟩ ∧ ⟨ 𝐵 , 𝐶 ⟩ Cgr ⟨ 𝐸 , 𝐹 ⟩ ) )
34 cgrtriv ⊢ ( ( 𝑁 ∈ ℕ ∧ 𝐴 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐷 ∈ ( 𝔼 ‘ 𝑁 ) ) → ⟨ 𝐴 , 𝐴 ⟩ Cgr ⟨ 𝐷 , 𝐷 ⟩ )
35 21 22 26 34 syl3anc ⊢ ( ( ( 𝑁 ∈ ℕ ∧ ( 𝐴 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐵 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐶 ∈ ( 𝔼 ‘ 𝑁 ) ) ∧ ( 𝐷 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐸 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐹 ∈ ( 𝔼 ‘ 𝑁 ) ) ) ∧ ( 𝐴 ≠ 𝐵 ∧ ( ( 𝐵 Btwn ⟨ 𝐴 , 𝐶 ⟩ ∧ 𝐸 Btwn ⟨ 𝐷 , 𝐹 ⟩ ) ∧ ( ⟨ 𝐴 , 𝐵 ⟩ Cgr ⟨ 𝐷 , 𝐸 ⟩ ∧ ⟨ 𝐵 , 𝐶 ⟩ Cgr ⟨ 𝐸 , 𝐹 ⟩ ) ) ) ) → ⟨ 𝐴 , 𝐴 ⟩ Cgr ⟨ 𝐷 , 𝐷 ⟩ )
36 33 simpld ⊢ ( ( ( 𝑁 ∈ ℕ ∧ ( 𝐴 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐵 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐶 ∈ ( 𝔼 ‘ 𝑁 ) ) ∧ ( 𝐷 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐸 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐹 ∈ ( 𝔼 ‘ 𝑁 ) ) ) ∧ ( 𝐴 ≠ 𝐵 ∧ ( ( 𝐵 Btwn ⟨ 𝐴 , 𝐶 ⟩ ∧ 𝐸 Btwn ⟨ 𝐷 , 𝐹 ⟩ ) ∧ ( ⟨ 𝐴 , 𝐵 ⟩ Cgr ⟨ 𝐷 , 𝐸 ⟩ ∧ ⟨ 𝐵 , 𝐶 ⟩ Cgr ⟨ 𝐸 , 𝐹 ⟩ ) ) ) ) → ⟨ 𝐴 , 𝐵 ⟩ Cgr ⟨ 𝐷 , 𝐸 ⟩ )
37 cgrcomlr ⊢ ( ( 𝑁 ∈ ℕ ∧ ( 𝐴 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐵 ∈ ( 𝔼 ‘ 𝑁 ) ) ∧ ( 𝐷 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐸 ∈ ( 𝔼 ‘ 𝑁 ) ) ) → ( ⟨ 𝐴 , 𝐵 ⟩ Cgr ⟨ 𝐷 , 𝐸 ⟩ ↔ ⟨ 𝐵 , 𝐴 ⟩ Cgr ⟨ 𝐸 , 𝐷 ⟩ ) )
38 21 22 23 26 28 37 syl122anc ⊢ ( ( ( 𝑁 ∈ ℕ ∧ ( 𝐴 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐵 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐶 ∈ ( 𝔼 ‘ 𝑁 ) ) ∧ ( 𝐷 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐸 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐹 ∈ ( 𝔼 ‘ 𝑁 ) ) ) ∧ ( 𝐴 ≠ 𝐵 ∧ ( ( 𝐵 Btwn ⟨ 𝐴 , 𝐶 ⟩ ∧ 𝐸 Btwn ⟨ 𝐷 , 𝐹 ⟩ ) ∧ ( ⟨ 𝐴 , 𝐵 ⟩ Cgr ⟨ 𝐷 , 𝐸 ⟩ ∧ ⟨ 𝐵 , 𝐶 ⟩ Cgr ⟨ 𝐸 , 𝐹 ⟩ ) ) ) ) → ( ⟨ 𝐴 , 𝐵 ⟩ Cgr ⟨ 𝐷 , 𝐸 ⟩ ↔ ⟨ 𝐵 , 𝐴 ⟩ Cgr ⟨ 𝐸 , 𝐷 ⟩ ) )
39 36 38 mpbid ⊢ ( ( ( 𝑁 ∈ ℕ ∧ ( 𝐴 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐵 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐶 ∈ ( 𝔼 ‘ 𝑁 ) ) ∧ ( 𝐷 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐸 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐹 ∈ ( 𝔼 ‘ 𝑁 ) ) ) ∧ ( 𝐴 ≠ 𝐵 ∧ ( ( 𝐵 Btwn ⟨ 𝐴 , 𝐶 ⟩ ∧ 𝐸 Btwn ⟨ 𝐷 , 𝐹 ⟩ ) ∧ ( ⟨ 𝐴 , 𝐵 ⟩ Cgr ⟨ 𝐷 , 𝐸 ⟩ ∧ ⟨ 𝐵 , 𝐶 ⟩ Cgr ⟨ 𝐸 , 𝐹 ⟩ ) ) ) ) → ⟨ 𝐵 , 𝐴 ⟩ Cgr ⟨ 𝐸 , 𝐷 ⟩ )
40 35 39 jca ⊢ ( ( ( 𝑁 ∈ ℕ ∧ ( 𝐴 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐵 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐶 ∈ ( 𝔼 ‘ 𝑁 ) ) ∧ ( 𝐷 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐸 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐹 ∈ ( 𝔼 ‘ 𝑁 ) ) ) ∧ ( 𝐴 ≠ 𝐵 ∧ ( ( 𝐵 Btwn ⟨ 𝐴 , 𝐶 ⟩ ∧ 𝐸 Btwn ⟨ 𝐷 , 𝐹 ⟩ ) ∧ ( ⟨ 𝐴 , 𝐵 ⟩ Cgr ⟨ 𝐷 , 𝐸 ⟩ ∧ ⟨ 𝐵 , 𝐶 ⟩ Cgr ⟨ 𝐸 , 𝐹 ⟩ ) ) ) ) → ( ⟨ 𝐴 , 𝐴 ⟩ Cgr ⟨ 𝐷 , 𝐷 ⟩ ∧ ⟨ 𝐵 , 𝐴 ⟩ Cgr ⟨ 𝐸 , 𝐷 ⟩ ) )
41 brofs ⊢ ( ( ( 𝑁 ∈ ℕ ∧ 𝐴 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐵 ∈ ( 𝔼 ‘ 𝑁 ) ) ∧ ( 𝐶 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐴 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐷 ∈ ( 𝔼 ‘ 𝑁 ) ) ∧ ( 𝐸 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐹 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐷 ∈ ( 𝔼 ‘ 𝑁 ) ) ) → ( ⟨ ⟨ 𝐴 , 𝐵 ⟩ , ⟨ 𝐶 , 𝐴 ⟩ ⟩ OuterFiveSeg ⟨ ⟨ 𝐷 , 𝐸 ⟩ , ⟨ 𝐹 , 𝐷 ⟩ ⟩ ↔ ( ( 𝐵 Btwn ⟨ 𝐴 , 𝐶 ⟩ ∧ 𝐸 Btwn ⟨ 𝐷 , 𝐹 ⟩ ) ∧ ( ⟨ 𝐴 , 𝐵 ⟩ Cgr ⟨ 𝐷 , 𝐸 ⟩ ∧ ⟨ 𝐵 , 𝐶 ⟩ Cgr ⟨ 𝐸 , 𝐹 ⟩ ) ∧ ( ⟨ 𝐴 , 𝐴 ⟩ Cgr ⟨ 𝐷 , 𝐷 ⟩ ∧ ⟨ 𝐵 , 𝐴 ⟩ Cgr ⟨ 𝐸 , 𝐷 ⟩ ) ) ) )
42 21 22 23 25 22 26 28 29 26 41 syl333anc ⊢ ( ( ( 𝑁 ∈ ℕ ∧ ( 𝐴 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐵 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐶 ∈ ( 𝔼 ‘ 𝑁 ) ) ∧ ( 𝐷 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐸 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐹 ∈ ( 𝔼 ‘ 𝑁 ) ) ) ∧ ( 𝐴 ≠ 𝐵 ∧ ( ( 𝐵 Btwn ⟨ 𝐴 , 𝐶 ⟩ ∧ 𝐸 Btwn ⟨ 𝐷 , 𝐹 ⟩ ) ∧ ( ⟨ 𝐴 , 𝐵 ⟩ Cgr ⟨ 𝐷 , 𝐸 ⟩ ∧ ⟨ 𝐵 , 𝐶 ⟩ Cgr ⟨ 𝐸 , 𝐹 ⟩ ) ) ) ) → ( ⟨ ⟨ 𝐴 , 𝐵 ⟩ , ⟨ 𝐶 , 𝐴 ⟩ ⟩ OuterFiveSeg ⟨ ⟨ 𝐷 , 𝐸 ⟩ , ⟨ 𝐹 , 𝐷 ⟩ ⟩ ↔ ( ( 𝐵 Btwn ⟨ 𝐴 , 𝐶 ⟩ ∧ 𝐸 Btwn ⟨ 𝐷 , 𝐹 ⟩ ) ∧ ( ⟨ 𝐴 , 𝐵 ⟩ Cgr ⟨ 𝐷 , 𝐸 ⟩ ∧ ⟨ 𝐵 , 𝐶 ⟩ Cgr ⟨ 𝐸 , 𝐹 ⟩ ) ∧ ( ⟨ 𝐴 , 𝐴 ⟩ Cgr ⟨ 𝐷 , 𝐷 ⟩ ∧ ⟨ 𝐵 , 𝐴 ⟩ Cgr ⟨ 𝐸 , 𝐷 ⟩ ) ) ) )
43 32 33 40 42 mpbir3and ⊢ ( ( ( 𝑁 ∈ ℕ ∧ ( 𝐴 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐵 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐶 ∈ ( 𝔼 ‘ 𝑁 ) ) ∧ ( 𝐷 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐸 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐹 ∈ ( 𝔼 ‘ 𝑁 ) ) ) ∧ ( 𝐴 ≠ 𝐵 ∧ ( ( 𝐵 Btwn ⟨ 𝐴 , 𝐶 ⟩ ∧ 𝐸 Btwn ⟨ 𝐷 , 𝐹 ⟩ ) ∧ ( ⟨ 𝐴 , 𝐵 ⟩ Cgr ⟨ 𝐷 , 𝐸 ⟩ ∧ ⟨ 𝐵 , 𝐶 ⟩ Cgr ⟨ 𝐸 , 𝐹 ⟩ ) ) ) ) → ⟨ ⟨ 𝐴 , 𝐵 ⟩ , ⟨ 𝐶 , 𝐴 ⟩ ⟩ OuterFiveSeg ⟨ ⟨ 𝐷 , 𝐸 ⟩ , ⟨ 𝐹 , 𝐷 ⟩ ⟩ )
44 simprl ⊢ ( ( ( 𝑁 ∈ ℕ ∧ ( 𝐴 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐵 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐶 ∈ ( 𝔼 ‘ 𝑁 ) ) ∧ ( 𝐷 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐸 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐹 ∈ ( 𝔼 ‘ 𝑁 ) ) ) ∧ ( 𝐴 ≠ 𝐵 ∧ ( ( 𝐵 Btwn ⟨ 𝐴 , 𝐶 ⟩ ∧ 𝐸 Btwn ⟨ 𝐷 , 𝐹 ⟩ ) ∧ ( ⟨ 𝐴 , 𝐵 ⟩ Cgr ⟨ 𝐷 , 𝐸 ⟩ ∧ ⟨ 𝐵 , 𝐶 ⟩ Cgr ⟨ 𝐸 , 𝐹 ⟩ ) ) ) ) → 𝐴 ≠ 𝐵 )
45 43 44 jca ⊢ ( ( ( 𝑁 ∈ ℕ ∧ ( 𝐴 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐵 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐶 ∈ ( 𝔼 ‘ 𝑁 ) ) ∧ ( 𝐷 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐸 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐹 ∈ ( 𝔼 ‘ 𝑁 ) ) ) ∧ ( 𝐴 ≠ 𝐵 ∧ ( ( 𝐵 Btwn ⟨ 𝐴 , 𝐶 ⟩ ∧ 𝐸 Btwn ⟨ 𝐷 , 𝐹 ⟩ ) ∧ ( ⟨ 𝐴 , 𝐵 ⟩ Cgr ⟨ 𝐷 , 𝐸 ⟩ ∧ ⟨ 𝐵 , 𝐶 ⟩ Cgr ⟨ 𝐸 , 𝐹 ⟩ ) ) ) ) → ( ⟨ ⟨ 𝐴 , 𝐵 ⟩ , ⟨ 𝐶 , 𝐴 ⟩ ⟩ OuterFiveSeg ⟨ ⟨ 𝐷 , 𝐸 ⟩ , ⟨ 𝐹 , 𝐷 ⟩ ⟩ ∧ 𝐴 ≠ 𝐵 ) )
46 5segofs ⊢ ( ( ( 𝑁 ∈ ℕ ∧ 𝐴 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐵 ∈ ( 𝔼 ‘ 𝑁 ) ) ∧ ( 𝐶 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐴 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐷 ∈ ( 𝔼 ‘ 𝑁 ) ) ∧ ( 𝐸 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐹 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐷 ∈ ( 𝔼 ‘ 𝑁 ) ) ) → ( ( ⟨ ⟨ 𝐴 , 𝐵 ⟩ , ⟨ 𝐶 , 𝐴 ⟩ ⟩ OuterFiveSeg ⟨ ⟨ 𝐷 , 𝐸 ⟩ , ⟨ 𝐹 , 𝐷 ⟩ ⟩ ∧ 𝐴 ≠ 𝐵 ) → ⟨ 𝐶 , 𝐴 ⟩ Cgr ⟨ 𝐹 , 𝐷 ⟩ ) )
47 31 45 46 sylc ⊢ ( ( ( 𝑁 ∈ ℕ ∧ ( 𝐴 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐵 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐶 ∈ ( 𝔼 ‘ 𝑁 ) ) ∧ ( 𝐷 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐸 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐹 ∈ ( 𝔼 ‘ 𝑁 ) ) ) ∧ ( 𝐴 ≠ 𝐵 ∧ ( ( 𝐵 Btwn ⟨ 𝐴 , 𝐶 ⟩ ∧ 𝐸 Btwn ⟨ 𝐷 , 𝐹 ⟩ ) ∧ ( ⟨ 𝐴 , 𝐵 ⟩ Cgr ⟨ 𝐷 , 𝐸 ⟩ ∧ ⟨ 𝐵 , 𝐶 ⟩ Cgr ⟨ 𝐸 , 𝐹 ⟩ ) ) ) ) → ⟨ 𝐶 , 𝐴 ⟩ Cgr ⟨ 𝐹 , 𝐷 ⟩ )
48 cgrcomlr ⊢ ( ( 𝑁 ∈ ℕ ∧ ( 𝐶 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐴 ∈ ( 𝔼 ‘ 𝑁 ) ) ∧ ( 𝐹 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐷 ∈ ( 𝔼 ‘ 𝑁 ) ) ) → ( ⟨ 𝐶 , 𝐴 ⟩ Cgr ⟨ 𝐹 , 𝐷 ⟩ ↔ ⟨ 𝐴 , 𝐶 ⟩ Cgr ⟨ 𝐷 , 𝐹 ⟩ ) )
49 21 25 22 29 26 48 syl122anc ⊢ ( ( ( 𝑁 ∈ ℕ ∧ ( 𝐴 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐵 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐶 ∈ ( 𝔼 ‘ 𝑁 ) ) ∧ ( 𝐷 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐸 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐹 ∈ ( 𝔼 ‘ 𝑁 ) ) ) ∧ ( 𝐴 ≠ 𝐵 ∧ ( ( 𝐵 Btwn ⟨ 𝐴 , 𝐶 ⟩ ∧ 𝐸 Btwn ⟨ 𝐷 , 𝐹 ⟩ ) ∧ ( ⟨ 𝐴 , 𝐵 ⟩ Cgr ⟨ 𝐷 , 𝐸 ⟩ ∧ ⟨ 𝐵 , 𝐶 ⟩ Cgr ⟨ 𝐸 , 𝐹 ⟩ ) ) ) ) → ( ⟨ 𝐶 , 𝐴 ⟩ Cgr ⟨ 𝐹 , 𝐷 ⟩ ↔ ⟨ 𝐴 , 𝐶 ⟩ Cgr ⟨ 𝐷 , 𝐹 ⟩ ) )
50 47 49 mpbid ⊢ ( ( ( 𝑁 ∈ ℕ ∧ ( 𝐴 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐵 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐶 ∈ ( 𝔼 ‘ 𝑁 ) ) ∧ ( 𝐷 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐸 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐹 ∈ ( 𝔼 ‘ 𝑁 ) ) ) ∧ ( 𝐴 ≠ 𝐵 ∧ ( ( 𝐵 Btwn ⟨ 𝐴 , 𝐶 ⟩ ∧ 𝐸 Btwn ⟨ 𝐷 , 𝐹 ⟩ ) ∧ ( ⟨ 𝐴 , 𝐵 ⟩ Cgr ⟨ 𝐷 , 𝐸 ⟩ ∧ ⟨ 𝐵 , 𝐶 ⟩ Cgr ⟨ 𝐸 , 𝐹 ⟩ ) ) ) ) → ⟨ 𝐴 , 𝐶 ⟩ Cgr ⟨ 𝐷 , 𝐹 ⟩ )
51 50 exp32 ⊢ ( ( 𝑁 ∈ ℕ ∧ ( 𝐴 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐵 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐶 ∈ ( 𝔼 ‘ 𝑁 ) ) ∧ ( 𝐷 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐸 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐹 ∈ ( 𝔼 ‘ 𝑁 ) ) ) → ( 𝐴 ≠ 𝐵 → ( ( ( 𝐵 Btwn ⟨ 𝐴 , 𝐶 ⟩ ∧ 𝐸 Btwn ⟨ 𝐷 , 𝐹 ⟩ ) ∧ ( ⟨ 𝐴 , 𝐵 ⟩ Cgr ⟨ 𝐷 , 𝐸 ⟩ ∧ ⟨ 𝐵 , 𝐶 ⟩ Cgr ⟨ 𝐸 , 𝐹 ⟩ ) ) → ⟨ 𝐴 , 𝐶 ⟩ Cgr ⟨ 𝐷 , 𝐹 ⟩ ) ) )
52 51 com12 ⊢ ( 𝐴 ≠ 𝐵 → ( ( 𝑁 ∈ ℕ ∧ ( 𝐴 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐵 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐶 ∈ ( 𝔼 ‘ 𝑁 ) ) ∧ ( 𝐷 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐸 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐹 ∈ ( 𝔼 ‘ 𝑁 ) ) ) → ( ( ( 𝐵 Btwn ⟨ 𝐴 , 𝐶 ⟩ ∧ 𝐸 Btwn ⟨ 𝐷 , 𝐹 ⟩ ) ∧ ( ⟨ 𝐴 , 𝐵 ⟩ Cgr ⟨ 𝐷 , 𝐸 ⟩ ∧ ⟨ 𝐵 , 𝐶 ⟩ Cgr ⟨ 𝐸 , 𝐹 ⟩ ) ) → ⟨ 𝐴 , 𝐶 ⟩ Cgr ⟨ 𝐷 , 𝐹 ⟩ ) ) )
53 20 52 pm2.61ine ⊢ ( ( 𝑁 ∈ ℕ ∧ ( 𝐴 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐵 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐶 ∈ ( 𝔼 ‘ 𝑁 ) ) ∧ ( 𝐷 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐸 ∈ ( 𝔼 ‘ 𝑁 ) ∧ 𝐹 ∈ ( 𝔼 ‘ 𝑁 ) ) ) → ( ( ( 𝐵 Btwn ⟨ 𝐴 , 𝐶 ⟩ ∧ 𝐸 Btwn ⟨ 𝐷 , 𝐹 ⟩ ) ∧ ( ⟨ 𝐴 , 𝐵 ⟩ Cgr ⟨ 𝐷 , 𝐸 ⟩ ∧ ⟨ 𝐵 , 𝐶 ⟩ Cgr ⟨ 𝐸 , 𝐹 ⟩ ) ) → ⟨ 𝐴 , 𝐶 ⟩ Cgr ⟨ 𝐷 , 𝐹 ⟩ ) )