diff options
Diffstat (limited to 'src/Cfe/Language')
| -rw-r--r-- | src/Cfe/Language/Properties.agda | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/src/Cfe/Language/Properties.agda b/src/Cfe/Language/Properties.agda index 61a11b2..6248e76 100644 --- a/src/Cfe/Language/Properties.agda +++ b/src/Cfe/Language/Properties.agda @@ -833,3 +833,10 @@ Fⁿ⊆⋃F = FⁿA⊆SupFA ⋃-inverseʳ : ∀ (A : Language a) → ⋃ (const A) ≈ A ⋃-inverseʳ _ = ⊆-antisym (sub λ {(ℕ.suc _ , w∈A) → w∈A}) (Fⁿ⊆⋃F 1) + +------------------------------------------------------------------------ +-- Other properties of Null +------------------------------------------------------------------------ + +∣w∣≡0+w∈A⇒ε∈A : ∀ {w} → length w ≡ 0 → w ∈ A → Null A +∣w∣≡0+w∈A⇒ε∈A {w = []} _ ε∈A = ε∈A |