15 lines
360 B
Text
15 lines
360 B
Text
Set: pp::colors
|
||
Set: pp::unicode
|
||
Imported 'cast'
|
||
Assumed: vec
|
||
Assumed: concat
|
||
Assumed: concat_assoc
|
||
Assumed: empty
|
||
Assumed: concat_empty
|
||
∀ (n : ℕ) (v : vec (n + 0)) (w : vec n), v = w ; empty
|
||
====>
|
||
∀ (n : ℕ) (v w : vec n), v = w
|
||
|
||
λ n : ℕ, ∃ (v : vec (n + 0)) (w : vec n), v ≠ w ; empty
|
||
====>
|
||
λ n : ℕ, ∃ v x : vec n, v ≠ x
|