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• Evalue+denv

Evalue+denv-equiv

Basic equivalence relation for evalue+denv structures.

Definitions and Theorems

Function: evalue+denv-equiv$inline

(defun evalue+denv-equiv$inline (acl2::x acl2::y)
  (declare (xargs :guard (and (evalue+denv-p acl2::x)
                              (evalue+denv-p acl2::y))))
  (equal (evalue+denv-fix acl2::x)
         (evalue+denv-fix acl2::y)))

Theorem: evalue+denv-equiv-is-an-equivalence

(defthm evalue+denv-equiv-is-an-equivalence
  (and (booleanp (evalue+denv-equiv x y))
       (evalue+denv-equiv x x)
       (implies (evalue+denv-equiv x y)
                (evalue+denv-equiv y x))
       (implies (and (evalue+denv-equiv x y)
                     (evalue+denv-equiv y z))
                (evalue+denv-equiv x z)))
  :rule-classes (:equivalence))

Theorem: evalue+denv-equiv-implies-equal-evalue+denv-fix-1

(defthm evalue+denv-equiv-implies-equal-evalue+denv-fix-1
  (implies (evalue+denv-equiv acl2::x x-equiv)
           (equal (evalue+denv-fix acl2::x)
                  (evalue+denv-fix x-equiv)))
  :rule-classes (:congruence))

Theorem: evalue+denv-fix-under-evalue+denv-equiv

(defthm evalue+denv-fix-under-evalue+denv-equiv
  (evalue+denv-equiv (evalue+denv-fix acl2::x)
                     acl2::x)
  :rule-classes (:rewrite :rewrite-quoted-constant))

Theorem: equal-of-evalue+denv-fix-1-forward-to-evalue+denv-equiv

(defthm equal-of-evalue+denv-fix-1-forward-to-evalue+denv-equiv
  (implies (equal (evalue+denv-fix acl2::x)
                  acl2::y)
           (evalue+denv-equiv acl2::x acl2::y))
  :rule-classes :forward-chaining)

Theorem: equal-of-evalue+denv-fix-2-forward-to-evalue+denv-equiv

(defthm equal-of-evalue+denv-fix-2-forward-to-evalue+denv-equiv
  (implies (equal acl2::x (evalue+denv-fix acl2::y))
           (evalue+denv-equiv acl2::x acl2::y))
  :rule-classes :forward-chaining)

Theorem: evalue+denv-equiv-of-evalue+denv-fix-1-forward

(defthm evalue+denv-equiv-of-evalue+denv-fix-1-forward
  (implies (evalue+denv-equiv (evalue+denv-fix acl2::x)
                              acl2::y)
           (evalue+denv-equiv acl2::x acl2::y))
  :rule-classes :forward-chaining)

Theorem: evalue+denv-equiv-of-evalue+denv-fix-2-forward

(defthm evalue+denv-equiv-of-evalue+denv-fix-2-forward
  (implies (evalue+denv-equiv acl2::x (evalue+denv-fix acl2::y))
           (evalue+denv-equiv acl2::x acl2::y))
  :rule-classes :forward-chaining)