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Irr-dexprefix

An irrelevant decimal exponent prefix.

This can be used as a dummy value of the type.

Function: irr-dexprefix

(defun irr-dexprefix nil
  (declare (xargs :guard t))
  (dexprefix-locase-e))

Theorem: dexprefixp-of-irr-dexprefix

(defthm dexprefixp-of-irr-dexprefix
  (b* ((acl2::irr (irr-dexprefix)))
    (dexprefixp acl2::irr))
  :rule-classes :rewrite)