{"categories":["Clojure","SICP"],"author_url":"https://blog.hatena.ne.jp/zehnpaard/","version":"1.0","provider_name":"Hatena Blog","blog_title":"Arantium Maestum","height":"190","width":"100%","type":"rich","provider_url":"https://hatena.blog","author_name":"zehnpaard","blog_url":"https://zehnpaard.hatenablog.com/","title":"SICP\u306e\u52c9\u5f37 \u554f\u984c1.45","url":"https://zehnpaard.hatenablog.com/entry/2016/06/06/143334","description":"SICP1.3.4\u306e\u554f\u984c1.45\u3092\u89e3\u3044\u3066\u307f\u308b\u3002 average-damp\u3068fixed-point\u3092\u4f7f\u3063\u3066\u4efb\u610f\u306ex\u3001n\u306b\u304a\u3051\u308bx\u306en\u4e57\u6839\u306e\u958b\u65b9\u3092\u6c42\u3081\u308b\u3002 average-damp\u3092\u4e00\u56de\u304b\u3051\u308b\u3060\u3051\u306e\u5834\u5408\u3001y -> x/y3\u307e\u3067\u306f\u5927\u4e08\u592b\u3060\u304c y -> x/y4\u3060\u3068\u53ce\u675f\u3057\u306a\u3044\u3002 \u3068\u308a\u3042\u3048\u305aaverage-damp\u3092\u4efb\u610f\u306e\u56de\u6570\u7e70\u308a\u8fd4\u3059\u95a2\u6570n-fold-average-damp\u3092\u3001\u3053\u308c\u307e\u3067\u306e\u554f\u984c\u3067\u4f5c\u3063\u305f\u95a2\u6570\u3092\u7d44\u307f\u5408\u308f\u305b\u3066\u4f5c\u308b\uff1a (defn compose [f g] (fn [x] (f (g x)))) (defn repeated [f n] (if (>= 1 n) f (compose f (re\u2026","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fzehnpaard.hatenablog.com%2Fentry%2F2016%2F06%2F06%2F143334\" title=\"SICP\u306e\u52c9\u5f37 \u554f\u984c1.45 - Arantium Maestum\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","image_url":null,"published":"2016-06-06 14:33:34"}