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Var-sinfo

Var-sinfo-equiv

Basic equivalence relation for var-sinfo structures.

Definitions and Theorems

Function: var-sinfo-equiv$inline

(defun var-sinfo-equiv$inline (acl2::x acl2::y)
  (declare (xargs :guard (and (var-sinfop acl2::x)
                              (var-sinfop acl2::y))))
  (equal (var-sinfo-fix acl2::x)
         (var-sinfo-fix acl2::y)))

Theorem: var-sinfo-equiv-is-an-equivalence

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

Theorem: var-sinfo-equiv-implies-equal-var-sinfo-fix-1

(defthm var-sinfo-equiv-implies-equal-var-sinfo-fix-1
  (implies (var-sinfo-equiv acl2::x x-equiv)
           (equal (var-sinfo-fix acl2::x)
                  (var-sinfo-fix x-equiv)))
  :rule-classes (:congruence))

Theorem: var-sinfo-fix-under-var-sinfo-equiv

(defthm var-sinfo-fix-under-var-sinfo-equiv
  (var-sinfo-equiv (var-sinfo-fix acl2::x)
                   acl2::x)
  :rule-classes (:rewrite :rewrite-quoted-constant))

Theorem: equal-of-var-sinfo-fix-1-forward-to-var-sinfo-equiv

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

Theorem: equal-of-var-sinfo-fix-2-forward-to-var-sinfo-equiv

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

Theorem: var-sinfo-equiv-of-var-sinfo-fix-1-forward

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

Theorem: var-sinfo-equiv-of-var-sinfo-fix-2-forward

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