Package list-reverse-thm: Properties of the list reverse function
Information
| name | list-reverse-thm |
| version | 1.15 |
| description | Properties of the list reverse function |
| author | Joe Leslie-Hurd <joe@gilith.com> |
| license | HOLLight |
| provenance | HOL Light theory extracted on 2012-03-24 |
| requires | bool list-append list-def list-length list-map list-reverse-def list-set natural set |
| show | Data.Bool Data.List Number.Natural Set |
Files
- Package tarball list-reverse-thm-1.15.tgz
- Theory file list-reverse-thm.thy (included in the package tarball)
Theorems
⊦ ∀l. reverse (reverse l) = l
⊦ ∀l. length (reverse l) = length l
⊦ ∀l. toSet (reverse l) = toSet l
⊦ ∀l x. member x (reverse l) ⇔ member x l
⊦ ∀f l. reverse (map f l) = map f (reverse l)
⊦ ∀l1 l2. reverse (l1 @ l2) = reverse l2 @ reverse l1
Input Type Operators
- →
- bool
- Data
- List
- list
- List
- Number
- Natural
- natural
- Natural
- Set
- set
Input Constants
- =
- Data
- Bool
- ∀
- ∧
- ⇒
- ⊤
- List
- ::
- @
- []
- length
- map
- member
- reverse
- toSet
- Bool
- Number
- Natural
- +
- suc
- zero
- Natural
- Set
- ∅
- insert
- ∈
- ∪
Assumptions
⊦ ⊤
⊦ length [] = 0
⊦ reverse [] = []
⊦ toSet [] = ∅
⊦ ∀t. (∀x. t) ⇔ t
⊦ (∀) = λp. p = λx. ⊤
⊦ ∀m. m + 0 = m
⊦ ∀l. [] @ l = l
⊦ ∀l. l @ [] = l
⊦ ∀f. map f [] = []
⊦ (⇒) = λp q. p ∧ q ⇔ p
⊦ ∀s t. s ∪ t = t ∪ s
⊦ ∀h t. length (h :: t) = suc (length t)
⊦ ∀l x. member x l ⇔ x ∈ toSet l
⊦ (∧) = λp q. (λf. f p q) = λf. f ⊤ ⊤
⊦ ∀h t. toSet (h :: t) = insert h (toSet t)
⊦ ∀x s. insert x ∅ ∪ s = insert x s
⊦ ∀m n. m + suc n = suc (m + n)
⊦ ∀l1 l2. length (l1 @ l2) = length l1 + length l2
⊦ ∀l1 l2. toSet (l1 @ l2) = toSet l1 ∪ toSet l2
⊦ ∀h t. reverse (h :: t) = reverse t @ h :: []
⊦ ∀l h t. (h :: t) @ l = h :: t @ l
⊦ ∀l1 l2 l3. l1 @ l2 @ l3 = (l1 @ l2) @ l3
⊦ ∀f h t. map f (h :: t) = f h :: map f t
⊦ ∀f l1 l2. map f (l1 @ l2) = map f l1 @ map f l2
⊦ ∀p. p [] ∧ (∀h t. p t ⇒ p (h :: t)) ⇒ ∀l. p l