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    %x.-fn

    Signature
    (%x.-fn nats) → element
    Arguments
    nats — Guard (nat-listp nats).
    Returns
    element — Type (elementp element).

    Definitions and Theorems

    Function: %x.-fn

    (defun %x.-fn (nats)
      (declare (xargs :guard (nat-listp nats)))
      (element-num-val (num-val-direct (num-base-hex) nats)))

    Theorem: elementp-of-%x.-fn

    (defthm elementp-of-%x.-fn
      (b* ((element (%x.-fn nats)))
        (elementp element))
      :rule-classes :rewrite)

    Theorem: %x.-fn-of-nat-list-fix-nats

    (defthm %x.-fn-of-nat-list-fix-nats
      (equal (%x.-fn (nat-list-fix nats))
             (%x.-fn nats)))

    Theorem: %x.-fn-nat-list-equiv-congruence-on-nats

    (defthm %x.-fn-nat-list-equiv-congruence-on-nats
      (implies (acl2::nat-list-equiv nats nats-equiv)
               (equal (%x.-fn nats)
                      (%x.-fn nats-equiv)))
      :rule-classes :congruence)