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• Lift-info

Lift-info-equiv

Basic equivalence relation for lift-info structures.

Definitions and Theorems

Function: lift-info-equiv$inline

(defun lift-info-equiv$inline (acl2::x acl2::y)
  (declare (xargs :guard (and (lift-infop acl2::x)
                              (lift-infop acl2::y))))
  (equal (lift-info-fix acl2::x)
         (lift-info-fix acl2::y)))

Theorem: lift-info-equiv-is-an-equivalence

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

Theorem: lift-info-equiv-implies-equal-lift-info-fix-1

(defthm lift-info-equiv-implies-equal-lift-info-fix-1
  (implies (lift-info-equiv acl2::x x-equiv)
           (equal (lift-info-fix acl2::x)
                  (lift-info-fix x-equiv)))
  :rule-classes (:congruence))

Theorem: lift-info-fix-under-lift-info-equiv

(defthm lift-info-fix-under-lift-info-equiv
  (lift-info-equiv (lift-info-fix acl2::x)
                   acl2::x)
  :rule-classes (:rewrite :rewrite-quoted-constant))

Theorem: equal-of-lift-info-fix-1-forward-to-lift-info-equiv

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

Theorem: equal-of-lift-info-fix-2-forward-to-lift-info-equiv

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

Theorem: lift-info-equiv-of-lift-info-fix-1-forward

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

Theorem: lift-info-equiv-of-lift-info-fix-2-forward

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