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• Std/basic
• Ifix

Std/basic/ifix

Rules about ifix.

Definitions and Theorems

Theorem: ifix-when-integerp

(defthm ifix-when-integerp
  (implies (integerp x)
           (equal (ifix x) x)))

Theorem: integerp-of-ifix

(defthm integerp-of-ifix
  (integerp (ifix x)))