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• Any-nat-map

Any-nat-mequiv

Basic equivalence relation for any-nat-map structures.

Definitions and Theorems

Function: any-nat-mequiv$inline

(defun any-nat-mequiv$inline (x y)
  (declare (xargs :guard (and (any-nat-mapp x)
                              (any-nat-mapp y))))
  (equal (any-nat-mfix x)
         (any-nat-mfix y)))

Theorem: any-nat-mequiv-is-an-equivalence

(defthm any-nat-mequiv-is-an-equivalence
  (and (booleanp (any-nat-mequiv x y))
       (any-nat-mequiv x x)
       (implies (any-nat-mequiv x y)
                (any-nat-mequiv y x))
       (implies (and (any-nat-mequiv x y)
                     (any-nat-mequiv y z))
                (any-nat-mequiv x z)))
  :rule-classes (:equivalence))

Theorem: any-nat-mequiv-implies-equal-any-nat-mfix-1

(defthm any-nat-mequiv-implies-equal-any-nat-mfix-1
  (implies (any-nat-mequiv x x-equiv)
           (equal (any-nat-mfix x)
                  (any-nat-mfix x-equiv)))
  :rule-classes (:congruence))

Theorem: any-nat-mfix-under-any-nat-mequiv

(defthm any-nat-mfix-under-any-nat-mequiv
  (any-nat-mequiv (any-nat-mfix x) x)
  :rule-classes (:rewrite :rewrite-quoted-constant))

Theorem: equal-of-any-nat-mfix-1-forward-to-any-nat-mequiv

(defthm equal-of-any-nat-mfix-1-forward-to-any-nat-mequiv
  (implies (equal (any-nat-mfix x) y)
           (any-nat-mequiv x y))
  :rule-classes :forward-chaining)

Theorem: equal-of-any-nat-mfix-2-forward-to-any-nat-mequiv

(defthm equal-of-any-nat-mfix-2-forward-to-any-nat-mequiv
  (implies (equal x (any-nat-mfix y))
           (any-nat-mequiv x y))
  :rule-classes :forward-chaining)

Theorem: any-nat-mequiv-of-any-nat-mfix-1-forward

(defthm any-nat-mequiv-of-any-nat-mfix-1-forward
  (implies (any-nat-mequiv (any-nat-mfix x) y)
           (any-nat-mequiv x y))
  :rule-classes :forward-chaining)

Theorem: any-nat-mequiv-of-any-nat-mfix-2-forward

(defthm any-nat-mequiv-of-any-nat-mfix-2-forward
  (implies (any-nat-mequiv x (any-nat-mfix y))
           (any-nat-mequiv x y))
  :rule-classes :forward-chaining)