{"provider_name":"Hatena Blog","image_url":null,"type":"rich","title":"R^d\u306e\u3042\u308b\u70b9\u5217\u306e\u96c6\u7a4d\u70b9\u5168\u4f53\u3068\u306a\u308b\u96c6\u5408\u306f\uff1f","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Ffujidig.hatenablog.com%2Fentry%2F2015%2F08%2F29%2F151028\" title=\"R^d\u306e\u3042\u308b\u70b9\u5217\u306e\u96c6\u7a4d\u70b9\u5168\u4f53\u3068\u306a\u308b\u96c6\u5408\u306f\uff1f - \u7406\u79d1\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","categories":[],"provider_url":"https://hatena.blog","width":"100%","author_url":"https://blog.hatena.ne.jp/fujidig/","blog_title":"\u7406\u79d1","blog_url":"https://fujidig.hatenablog.com/","url":"https://fujidig.hatenablog.com/entry/2015/08/29/151028","published":"2015-08-29 15:10:28","height":"190","author_name":"fujidig","version":"1.0","description":"\u5b9a\u7fa9 $\\mathbb{R}^d$\u306e\u70b9\u5217$\\{x_n\\}$\u306b\u5bfe\u3057\u3001\u3053\u306e\u70b9\u5217\u306e\u53ce\u675f\u3059\u308b\u90e8\u5206\u5217\u306e\u6975\u9650\u3068\u306a\u308b\u70b9\u3092\u70b9\u5217$\\{x_n\\}$\u306e\u96c6\u7a4d\u70b9\u3068\u3044\u3046\u3002 \u554f\u984c $\\mathbb{R}^d$\u306e\u3042\u308b\u70b9\u5217\u306e\u96c6\u7a4d\u70b9\u5168\u4f53\u3068\u306a\u308b\u96c6\u5408\u306f\u3069\u3093\u306a\u96c6\u5408\u304b\u3002 \u7b54\u3048 $\\mathbb{R}^d$\u306e\u9589\u96c6\u5408\u3067\u3042\u308b\u3002 \u5fc5\u8981\u6027\u306e\u8a3c\u660e $A \\subset \\mathbb{R}^d$\u304c\u70b9\u5217$\\{x_n\\}$\u306e\u96c6\u7a4d\u70b9\u5168\u4f53\u3068\u3059\u308b\u3002$A$\u304c\u9589\u96c6\u5408\u3067\u3042\u308b\u3053\u3068\u3092\u793a\u3059\u3002\u307e\u305a\u3001 $a \\in A \\iff$ \u4efb\u610f\u306e$\\epsilon > 0$\u306b\u5bfe\u3057\u7121\u9650\u500b\u306e\u81ea\u7136\u6570$n$\u304c\u5b58\u5728\u3057\u3066$|x_n - a| \u304c\u6210\u308a\u7acb\u3064\u3002 $A$\u304c\u9589\u96c6\u5408\u3067\u3042\u308b\u3053\u3068\u3092\u793a\u3059\u306b\u306f$\u2026"}