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• Lit-list

Lit-list-equiv

Basic equivalence relation for lit-list structures.

Definitions and Theorems

Function: lit-list-equiv$inline

(defun lit-list-equiv$inline (acl2::x acl2::y)
  (declare (xargs :guard (and (lit-listp acl2::x)
                              (lit-listp acl2::y))))
  (equal (lit-list-fix acl2::x)
         (lit-list-fix acl2::y)))

Theorem: lit-list-equiv-is-an-equivalence

(defthm lit-list-equiv-is-an-equivalence
  (and (booleanp (lit-list-equiv x y))
       (lit-list-equiv x x)
       (implies (lit-list-equiv x y)
                (lit-list-equiv y x))
       (implies (and (lit-list-equiv x y)
                     (lit-list-equiv y z))
                (lit-list-equiv x z)))
  :rule-classes (:equivalence))

Theorem: lit-list-equiv-implies-equal-lit-list-fix-1

(defthm lit-list-equiv-implies-equal-lit-list-fix-1
  (implies (lit-list-equiv acl2::x x-equiv)
           (equal (lit-list-fix acl2::x)
                  (lit-list-fix x-equiv)))
  :rule-classes (:congruence))

Theorem: lit-list-fix-under-lit-list-equiv

(defthm lit-list-fix-under-lit-list-equiv
  (lit-list-equiv (lit-list-fix acl2::x)
                  acl2::x)
  :rule-classes (:rewrite :rewrite-quoted-constant))

Theorem: equal-of-lit-list-fix-1-forward-to-lit-list-equiv

(defthm equal-of-lit-list-fix-1-forward-to-lit-list-equiv
  (implies (equal (lit-list-fix acl2::x) acl2::y)
           (lit-list-equiv acl2::x acl2::y))
  :rule-classes :forward-chaining)

Theorem: equal-of-lit-list-fix-2-forward-to-lit-list-equiv

(defthm equal-of-lit-list-fix-2-forward-to-lit-list-equiv
  (implies (equal acl2::x (lit-list-fix acl2::y))
           (lit-list-equiv acl2::x acl2::y))
  :rule-classes :forward-chaining)

Theorem: lit-list-equiv-of-lit-list-fix-1-forward

(defthm lit-list-equiv-of-lit-list-fix-1-forward
  (implies (lit-list-equiv (lit-list-fix acl2::x)
                           acl2::y)
           (lit-list-equiv acl2::x acl2::y))
  :rule-classes :forward-chaining)

Theorem: lit-list-equiv-of-lit-list-fix-2-forward

(defthm lit-list-equiv-of-lit-list-fix-2-forward
  (implies (lit-list-equiv acl2::x (lit-list-fix acl2::y))
           (lit-list-equiv acl2::x acl2::y))
  :rule-classes :forward-chaining)