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    • Toplevel

    Toplevel-equiv

    Basic equivalence relation for toplevel structures.

    Definitions and Theorems

    Function: toplevel-equiv$inline

    (defun toplevel-equiv$inline (acl2::x acl2::y)
      (declare (xargs :guard (and (toplevelp acl2::x)
                                  (toplevelp acl2::y))))
      (equal (toplevel-fix acl2::x)
             (toplevel-fix acl2::y)))

    Theorem: toplevel-equiv-is-an-equivalence

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

    Theorem: toplevel-equiv-implies-equal-toplevel-fix-1

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

    Theorem: toplevel-fix-under-toplevel-equiv

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

    Theorem: equal-of-toplevel-fix-1-forward-to-toplevel-equiv

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

    Theorem: equal-of-toplevel-fix-2-forward-to-toplevel-equiv

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

    Theorem: toplevel-equiv-of-toplevel-fix-1-forward

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

    Theorem: toplevel-equiv-of-toplevel-fix-2-forward

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