Package relation: Relation operators

Information

name	relation
version	1.25
description	Relation operators
author	Joe Hurd <joe@gilith.com>
license	MIT
requires	bool function pair natural set
show	Data.Bool Data.Pair Function Number.Natural Relation

Files

Package tarball relation-1.25.tgz
Theory file relation.thy (included in the package tarball)

Defined Constants

Number
- Natural
  - isSuc
Relation
- bigIntersect
- bigUnion
- empty
- fromSet
- intersect
- irreflexive
- measure
- reflexive
- subrelation
- toSet
- transitive
- transitiveClosure
- union
- universe
- wellFounded

Theorems

⊦ irreflexive empty

⊦ irreflexive isSuc

⊦ reflexive universe

⊦ transitive empty

⊦ transitive universe

⊦ transitive (<)

⊦ wellFounded empty

⊦ wellFounded (<)

⊦ wellFounded isSuc

⊦ subrelation isSuc (<)

⊦ empty = fromSet Set.∅

⊦ universe = fromSet Set.universe

⊦ transitiveClosure isSuc = (<)

⊦ ∀m. wellFounded (measure m)

⊦ ∀r. transitive (transitiveClosure r)

⊦ ∀r. subrelation r r

⊦ ∀r. subrelation r (transitiveClosure r)

⊦ ∀x y. universe x y

⊦ ∀s. toSet (fromSet s) = s

⊦ ∀r. wellFounded r ⇒ irreflexive r

⊦ ∀r. fromSet (toSet r) = r

⊦ ∀x y. ¬empty x y

⊦ ∀r x. reflexive r ⇒ r x x

⊦ ∀r. reflexive r ⇔ ∀x. r x x

⊦ ∀s. bigIntersect s = fromSet (Set.bigIntersect (Set.image toSet s))

⊦ ∀s. bigUnion s = fromSet (Set.bigUnion (Set.image toSet s))

⊦ ∀r x. irreflexive r ⇒ ¬r x x

⊦ ∀r. irreflexive r ⇔ ∀x. ¬r x x

⊦ ∀m n. isSuc m n ⇔ suc m = n

⊦ ∀r. subrelation isSuc r ∧ transitive r ⇒ subrelation (<) r

⊦ ∀r s. subrelation r s ∧ wellFounded s ⇒ wellFounded r

⊦ ∀r s. subrelation r s ⇔ Set.⊆ (toSet r) (toSet s)

⊦ ∀r s. toSet r = toSet s ⇒ r = s

⊦ ∀r s. intersect r s = fromSet (Set.∩ (toSet r) (toSet s))

⊦ ∀r s. union r s = fromSet (Set.∪ (toSet r) (toSet s))

⊦ ∀r m. wellFounded r ⇒ wellFounded (λx y. r (m x) (m y))

⊦ ∀r s.
subrelation r s ∧ transitive s ⇒ subrelation (transitiveClosure r) s

⊦ ∀r s. subrelation r s ∧ subrelation s r ⇒ r = s

⊦ ∀m x y. measure m x y ⇔ m x < m y

⊦ ∀s x y. fromSet s x y ⇔ Set.∈ (x, y) s

⊦ ∀r. wellFounded r ⇔ ¬∃f. ∀n. r (f (suc n)) (f n)

⊦ ∀r x y. Set.∈ (x, y) (toSet r) ⇔ r x y

⊦ ∀r s t. subrelation r s ∧ subrelation s t ⇒ subrelation r t

⊦ ∀r s. subrelation r (bigIntersect s) ⇔ ∀t. Set.∈ t s ⇒ subrelation r t

⊦ ∀r s. subrelation r s ⇔ ∀x y. r x y ⇒ s x y

⊦ ∀r s. (∀x y. r x y ⇔ s x y) ⇒ r = s

⊦ ∀r. toSet r = { x y. x, y | r x y }

⊦ ∀s x y. bigIntersect s x y ⇔ ∀r. Set.∈ r s ⇒ r x y

⊦ ∀s x y. bigUnion s x y ⇔ ∃r. Set.∈ r s ∧ r x y

⊦ ∀p g h. ∃f. ∀x. f x = if p x then f (g x) else h x

⊦ ∀r.
transitiveClosure r =
bigIntersect { s. s | subrelation r s ∧ transitive s }

⊦ ∀r s x y. intersect r s x y ⇔ r x y ∧ s x y

⊦ ∀r s x y. union r s x y ⇔ r x y ∨ s x y

⊦ ∀r. transitive r ⇔ ∀x y z. r x y ∧ r y z ⇒ r x z

⊦ ∀m a b. (∀y. measure m y a ⇒ measure m y b) ⇔ m a ≤ m b

⊦ ∀r. wellFounded r ⇔ ∀p. (∀x. (∀y. r y x ⇒ p y) ⇒ p x) ⇒ ∀x. p x

⊦ ∀r. wellFounded r ⇔ ∀p. (∃x. p x) ⇔ ∃x. p x ∧ ∀y. r y x ⇒ ¬p y

⊦ ∀r. wellFounded r ⇔ ∀p. (∃x. p x) ⇒ ∃x. p x ∧ ∀y. r y x ⇒ ¬p y

⊦ ∀r s.
wellFounded r ∧ wellFounded s ⇒
wellFounded (λ(x1, y1) (x2, y2). r x1 x2 ∧ s y1 y2)

⊦ ∀r.
    wellFounded r ⇒
    ∀h.
      (∀f g x. (∀z. r z x ⇒ f z = g z) ⇒ h f x = h g x) ⇒
      ∃!f. ∀x. f x = h f x

⊦ ∀r s.
wellFounded r ∧ wellFounded s ⇒
wellFounded (λ(x1, y1) (x2, y2). r x1 x2 ∨ x1 = x2 ∧ s y1 y2)

⊦ ∀r.
(∀x. ¬r x x) ∧ (∀x y z. r x y ∧ r y z ⇒ r x z) ∧
(∀x. Set.finite { y. y | r y x }) ⇒ wellFounded r

⊦ ∀r s.
wellFounded r ∧ (∀a. wellFounded (s a)) ⇒
wellFounded (λ(x1, y1) (x2, y2). r x1 x2 ∨ x1 = x2 ∧ s x1 y1 y2)

Input Type Operators

→
bool
Data
- Pair
  - ×
Number
- Natural
  - natural
Set
- Set.set

Input Constants

=
select
Data
- Bool
  - ∀
  - ∧
  - ⇒
  - ∃
  - ∃!
  - ∨
  - ¬
  - cond
  - F
  - T
- Pair
  - ,
Function
- id
Number
- Natural
  - +
  - <
  - ≤
  - suc
  - zero
Set
- Set.∅
- Set.bigIntersect
- Set.bigUnion
- Set.finite
- Set.fromPredicate
- Set.image
- Set.infinite
- Set.insert
- Set.∩
- Set.∈
- Set.⊆
- Set.∪
- Set.universe

Assumptions

⊦ T

⊦ Set.infinite Set.universe

⊦ ¬F ⇔ T

⊦ ¬T ⇔ F

⊦ ∀x. Set.∈ x Set.universe

⊦ ∀t. t ⇒ t

⊦ F ⇔ ∀p. p

⊦ ∀x. ¬Set.∈ x Set.∅

⊦ ∀x. id x = x

⊦ ∀t. t ∨ ¬t

⊦ ∀n. ¬(n < n)

⊦ ∀n. 0 < suc n

⊦ ∀n. n < suc n

⊦ (¬) = λp. p ⇒ F

⊦ ∀t. (∀x. t) ⇔ t

⊦ ∀t. (∃x. t) ⇔ t

⊦ ∀t. (λx. t x) = t

⊦ (∀) = λp. p = λx. T

⊦ ∀t. ¬¬t ⇔ t

⊦ ∀t. (T ⇔ t) ⇔ t

⊦ ∀t. F ∧ t ⇔ F

⊦ ∀t. T ∧ t ⇔ t

⊦ ∀t. t ∧ F ⇔ F

⊦ ∀t. t ∧ T ⇔ t

⊦ ∀t. F ⇒ t ⇔ T

⊦ ∀t. T ⇒ t ⇔ t

⊦ ∀t. t ⇒ T ⇔ T

⊦ ∀t. F ∨ t ⇔ t

⊦ ∀t. T ∨ t ⇔ T

⊦ ∀t. t ∨ F ⇔ t

⊦ ∀t. t ∨ T ⇔ T

⊦ ∀m. m < 0 ⇔ F

⊦ ∀m. m + 0 = m

⊦ ∀t. (F ⇔ t) ⇔ ¬t

⊦ ∀t. (t ⇔ F) ⇔ ¬t

⊦ ∀t. t ⇒ F ⇔ ¬t

⊦ ∀s. Set.infinite s ⇔ ¬Set.finite s

⊦ (⇒) = λp q. p ∧ q ⇔ p

⊦ ∀t. (t ⇔ T) ∨ (t ⇔ F)

⊦ ∀t1 t2. (if F then t1 else t2) = t2

⊦ ∀t1 t2. (if T then t1 else t2) = t1

⊦ ∀p x. p x ⇒ p ((select) p)

⊦ ∀f y. (let x ← y in f x) = f y

⊦ ∀x y. x = y ⇔ y = x

⊦ ∀t1 t2. t1 ∧ t2 ⇔ t2 ∧ t1

⊦ ∀t1 t2. t1 ∨ t2 ⇔ t2 ∨ t1

⊦ ∀s x. Set.finite (Set.insert x s) ⇔ Set.finite s

⊦ ∀p x. Set.∈ x (Set.fromPredicate p) ⇔ p x

⊦ ∀m n. ¬(m ≤ n) ⇔ n < m

⊦ ∀m. m = 0 ∨ ∃n. m = suc n

⊦ (∧) = λp q. (λf. f p q) = λf. f T T

⊦ ∀P. ¬(∀x. P x) ⇔ ∃x. ¬P x

⊦ ∀P. ¬(∃x. P x) ⇔ ∀x. ¬P x

⊦ (∃) = λP. ∀q. (∀x. P x ⇒ q) ⇒ q

⊦ ∀t1 t2. ¬(t1 ⇒ t2) ⇔ t1 ∧ ¬t2

⊦ ∀t1 t2. ¬t1 ⇒ ¬t2 ⇔ t2 ⇒ t1

⊦ ∀m n. m + suc n = suc (m + n)

⊦ ∀m n. suc m < suc n ⇔ m < n

⊦ ∀s t. Set.finite t ∧ Set.⊆ s t ⇒ Set.finite s

⊦ ∀t1 t2. ¬(t1 ∧ t2) ⇔ ¬t1 ∨ ¬t2

⊦ ∀P. (∀p. P p) ⇔ ∀p1 p2. P (p1, p2)

⊦ ∀f g. (∀x. f x = g x) ⇔ f = g

⊦ (∨) = λp q. ∀r. (p ⇒ r) ⇒ (q ⇒ r) ⇒ r

⊦ ∀m n. m < n ∨ n < m ∨ m = n

⊦ ∀s t. Set.⊆ s t ∧ Set.⊆ t s ⇒ s = t

⊦ ∀PAIR'. ∃fn. ∀a0 a1. fn (a0, a1) = PAIR' a0 a1

⊦ ∀m n. m < n ⇔ ∃d. n = m + suc d

⊦ ∀P Q. (∀x. P ∨ Q x) ⇔ P ∨ ∀x. Q x

⊦ ∀P Q. (∃x. P ∧ Q x) ⇔ P ∧ ∃x. Q x

⊦ ∀P Q. P ∧ (∀x. Q x) ⇔ ∀x. P ∧ Q x

⊦ ∀P Q. P ∧ (∃x. Q x) ⇔ ∃x. P ∧ Q x

⊦ ∀P Q. P ⇒ (∀x. Q x) ⇔ ∀x. P ⇒ Q x

⊦ ∀P Q. P ∨ (∀x. Q x) ⇔ ∀x. P ∨ Q x

⊦ ∀P Q. P ∨ (∃x. Q x) ⇔ ∃x. P ∨ Q x

⊦ ∀m n. m < suc n ⇔ m = n ∨ m < n

⊦ ∀P Q. (∀x. P x) ∧ Q ⇔ ∀x. P x ∧ Q

⊦ ∀P Q. (∃x. P x) ∧ Q ⇔ ∃x. P x ∧ Q

⊦ ∀P Q. (∃x. P x) ⇒ Q ⇔ ∀x. P x ⇒ Q

⊦ ∀P Q. (∀x. P x) ∨ Q ⇔ ∀x. P x ∨ Q

⊦ ∀P Q. (∃x. P x) ∨ Q ⇔ ∃x. P x ∨ Q

⊦ ∀p q r. p ⇒ q ⇒ r ⇔ p ∧ q ⇒ r

⊦ ∀t1 t2 t3. (t1 ∧ t2) ∧ t3 ⇔ t1 ∧ t2 ∧ t3

⊦ ∀t1 t2 t3. (t1 ∨ t2) ∨ t3 ⇔ t1 ∨ t2 ∨ t3

⊦ ∀m n p. m < n ∧ n < p ⇒ m < p

⊦ ∀m n p. m < n ∧ n ≤ p ⇒ m < p

⊦ ∀s t u. Set.⊆ s t ∧ Set.⊆ t u ⇒ Set.⊆ s u

⊦ ∀s t. Set.⊆ s t ⇔ ∀x. Set.∈ x s ⇒ Set.∈ x t

⊦ ∀s t. (∀x. Set.∈ x s ⇔ Set.∈ x t) ⇒ s = t

⊦ ∀P x. (∀y. P y ⇔ y = x) ⇒ (select) P = x

⊦ ∀P. (∀x. ∃y. P x y) ⇔ ∃y. ∀x. P x (y x)

⊦ ∀t f. Set.⊆ t (Set.bigIntersect f) ⇔ ∀s. Set.∈ s f ⇒ Set.⊆ t s

⊦ ∀P. P 0 ∧ (∀n. P n ⇒ P (suc n)) ⇒ ∀n. P n

⊦ ∀s x. Set.∈ x (Set.bigIntersect s) ⇔ ∀t. Set.∈ t s ⇒ Set.∈ x t

⊦ ∀s x. Set.∈ x (Set.bigUnion s) ⇔ ∃t. Set.∈ t s ∧ Set.∈ x t

⊦ ∀p x. Set.∈ x { y. y | p y } ⇔ p x

⊦ ∀x y s. Set.∈ x (Set.insert y s) ⇔ x = y ∨ Set.∈ x s

⊦ ∀s t x. Set.∈ x (Set.∩ s t) ⇔ Set.∈ x s ∧ Set.∈ x t

⊦ ∀s t x. Set.∈ x (Set.∪ s t) ⇔ Set.∈ x s ∨ Set.∈ x t

⊦ (∃!) = λP. (∃) P ∧ ∀x y. P x ∧ P y ⇒ x = y

⊦ ∀P. (∀n. (∀m. m < n ⇒ P m) ⇒ P n) ⇒ ∀n. P n

⊦ ∀P Q. (∀x. P x ∧ Q x) ⇔ (∀x. P x) ∧ ∀x. Q x

⊦ ∀P Q. (∃x. P x ∨ Q x) ⇔ (∃x. P x) ∨ ∃x. Q x

⊦ ∀P Q. (∀x. P x ⇒ Q x) ⇒ (∀x. P x) ⇒ ∀x. Q x

⊦ ∀P Q. (∀x. P x ⇒ Q x) ⇒ (∃x. P x) ⇒ ∃x. Q x

⊦ ∀P Q. (∃x. P x) ∨ (∃x. Q x) ⇔ ∃x. P x ∨ Q x

⊦ ∀e f. ∃!fn. fn 0 = e ∧ ∀n. fn (suc n) = f (fn n) n

⊦ ∀y s f. Set.∈ y (Set.image f s) ⇔ ∃x. y = f x ∧ Set.∈ x s

⊦ ∀x y a b. (x, y) = (a, b) ⇔ x = a ∧ y = b

⊦ ∀A B C D. (A ⇒ B) ∧ (C ⇒ D) ⇒ A ∧ C ⇒ B ∧ D

⊦ ∀A B C D. (B ⇒ A) ∧ (C ⇒ D) ⇒ (A ⇒ C) ⇒ B ⇒ D

⊦ ∀P c x y. P (if c then x else y) ⇔ (c ⇒ P x) ∧ (¬c ⇒ P y)

⊦ ∀f s.
(∀x y. f x = f y ⇒ x = y) ∧ Set.infinite s ⇒
Set.infinite (Set.image f s)

⊦ ∀P f s. (∀y. Set.∈ y (Set.image f s) ⇒ P y) ⇔ ∀x. Set.∈ x s ⇒ P (f x)