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-rw-r--r--divisor-list.lisp1
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diff --git a/divisor-list.lisp b/divisor-list.lisp
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--- a/divisor-list.lisp
+++ b/divisor-list.lisp
@@ -1,4 +1,5 @@
;;; divisor-list.lisp: 約数に関する証明
+(in-package "ACL2")
;; e が x の約数であるかどうかを調べる述語
(defmacro divisorp (e x)