{"provider_name":"Hatena Blog","categories":[],"version":"1.0","image_url":null,"provider_url":"https://hatena.blog","width":"100%","type":"rich","blog_url":"https://yosh.hateblo.jp/","description":"\u81ea\u7136\u6570\u306e\u69d8\u3005\u306a\u6027\u8cea\u306f\u65e2\u306bCoq\u306e\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u306b\u8c4a\u5bcc\u306b\u63c3\u3063\u3066\u3044\u308b\u304c\u3001\u3053\u308c\u3089\u306e\u6027\u8cea\u306f\u975e\u5e38\u306b\u30d9\u30fc\u30b7\u30c3\u30af\u306a\u306e\u3067\u3001\u4e00\u304b\u3089\u5b9a\u7fa9\u3057\u3066\u8a3c\u660e\u3057\u3066\u307f\u305f\u3002\u4ee5\u4e0b\u306fCoq\u306eArith\u30e9\u30a4\u30d6\u30e9\u30ea\u3082\u7279\u5225\u306a\u30bf\u30af\u30c6\u30a3\u30c3\u30af\u3082\u4f7f\u308f\u305a\u306b\u5b9f\u88c5\u3057\u305f\u3002\u307e\u305a\u3001\u81ea\u7136\u6570\u5168\u4f53\u306e\u578b nat \u3092\u5b9a\u7fa9\u3059\u308b\u3002 Inductive nat : Set := | O : nat | S : nat -> nat. \u6b21\u306b\u3053\u306e\u81ea\u7136\u6570\u4e0a\u3067\u306e\u8db3\u3057\u7b97\u3092\u8a08\u7b97\u3059\u308b plus \u95a2\u6570\u3092\u5b9a\u7fa9\u3059\u308b\u3002 Fixpoint plus x y := match x with | O => y | S x => S (plus x y) end where \"x + y\" := (plu\u2026","author_url":"https://blog.hatena.ne.jp/yoshihiro503/","url":"https://yosh.hateblo.jp/entry/20091023/p2","author_name":"yoshihiro503","title":" \u81ea\u7136\u6570(\u30a8\u30f3\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u306f\u554f\u308f\u305a)\u306e\u52a0\u7b97\u306e\u53ef\u63db\u6cd5\u5247\u3001\u7d50\u5408\u6cd5\u5247\u3001\u5206\u914d\u6cd5\u5247\u3092\u8a3c\u660e\u3002","published":"2009-10-23 00:00:01","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fyosh.hateblo.jp%2Fentry%2F20091023%2Fp2\" title=\" \u81ea\u7136\u6570(\u30a8\u30f3\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u306f\u554f\u308f\u305a)\u306e\u52a0\u7b97\u306e\u53ef\u63db\u6cd5\u5247\u3001\u7d50\u5408\u6cd5\u5247\u3001\u5206\u914d\u6cd5\u5247\u3092\u8a3c\u660e\u3002 - \u306b\u308f\u3068\u308a\u5c0f\u5c4b\u3067\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","blog_title":"\u306b\u308f\u3068\u308a\u5c0f\u5c4b\u3067\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0","height":"190"}