Step |
Hyp |
Ref |
Expression |
1 |
|
iccss2 |
⊢ ( ( 𝑥 ∈ ( 𝐴 [,] 𝐵 ) ∧ 𝑦 ∈ ( 𝐴 [,] 𝐵 ) ) → ( 𝑥 [,] 𝑦 ) ⊆ ( 𝐴 [,] 𝐵 ) ) |
2 |
1
|
rgen2 |
⊢ ∀ 𝑥 ∈ ( 𝐴 [,] 𝐵 ) ∀ 𝑦 ∈ ( 𝐴 [,] 𝐵 ) ( 𝑥 [,] 𝑦 ) ⊆ ( 𝐴 [,] 𝐵 ) |
3 |
|
iccssre |
⊢ ( ( 𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ ) → ( 𝐴 [,] 𝐵 ) ⊆ ℝ ) |
4 |
|
reconn |
⊢ ( ( 𝐴 [,] 𝐵 ) ⊆ ℝ → ( ( ( topGen ‘ ran (,) ) ↾t ( 𝐴 [,] 𝐵 ) ) ∈ Conn ↔ ∀ 𝑥 ∈ ( 𝐴 [,] 𝐵 ) ∀ 𝑦 ∈ ( 𝐴 [,] 𝐵 ) ( 𝑥 [,] 𝑦 ) ⊆ ( 𝐴 [,] 𝐵 ) ) ) |
5 |
3 4
|
syl |
⊢ ( ( 𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ ) → ( ( ( topGen ‘ ran (,) ) ↾t ( 𝐴 [,] 𝐵 ) ) ∈ Conn ↔ ∀ 𝑥 ∈ ( 𝐴 [,] 𝐵 ) ∀ 𝑦 ∈ ( 𝐴 [,] 𝐵 ) ( 𝑥 [,] 𝑦 ) ⊆ ( 𝐴 [,] 𝐵 ) ) ) |
6 |
2 5
|
mpbiri |
⊢ ( ( 𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ ) → ( ( topGen ‘ ran (,) ) ↾t ( 𝐴 [,] 𝐵 ) ) ∈ Conn ) |