{"type":"rich","provider_name":"Hatena Blog","image_url":null,"title":"\u98fd\u304d\u305f\u3089\u3084\u3081\u3088\u3046Galois\u7406\u8ad6(6)\u2015\u5358\u62e1\u5927\u3067\u904a\u3076","blog_title":"\u3089\u3093\u3060\u3080\u306a\u8a18\u61b6","author_url":"https://blog.hatena.ne.jp/derwind/","categories":["math-alg"],"height":"190","provider_url":"https://hatena.blog","description":"\u5186\u5468\u7387\u00d7\u7121\u7406\u6570\u00d7\u8d85\u8d8a\u6570 - \u3089\u3093\u3060\u3080\u306a\u8a18\u61b6\u3067\u89e6\u308c\u305f\u3088\u3046\u306bTaylor\u5c55\u958b\u3092\u7528\u3044\u3066 $\\pi$ \u304c\u8d85\u8d8a\u6570\u3067\u3042\u308b\u3053\u3068\u3092\u793a\u3059\u3053\u3068\u304c\u3067\u304d\u308b\u3002 \u3068\u3044\u3046\u308f\u3051\u3067\u3001 $\\Q$ \u306e\u5358\u62e1\u5927 $\\Q(\\sqrt{-1})$ \u3068 $\\Q(\\pi)$ \u306f\u826f\u3044\u30b5\u30f3\u30d7\u30eb\u3067\u3042\u308b\u3088\u3046\u306b\u601d\u3046\u3002 $\\Q[X]/(X^2 + 1) \\simeq \\Q(\\sqrt{-1}) = \\Q[\\sqrt{-1}]$ \u3067\u3042\u308a\u3001 $\\Q(X) \\simeq \\Q(\\pi)$ \u3067\u3042\u308b\u3002\u5b9f\u969b\u306b\u96c6\u5408\u3092\u5185\u5305\u7684\u8a18\u6cd5\u3067\u66f8\u304d\u4e0b\u3059\u3068\u306a\u308b\u307b\u3069\u306a\u3068\u3044\u3046\u6c17\u5206\u306b\u306a\u308b\u3002 \u524d\u8005\u306f $\\{aX + b\\;\\ a,b \\in \\Q\\}$ \u3068 $\\{a\\sqrt{-1} + b;\u2026","published":"2016-08-17 02:34:23","author_name":"derwind","version":"1.0","width":"100%","url":"https://randommemory.hatenablog.com/entry/2016/08/17/023423","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Frandommemory.hatenablog.com%2Fentry%2F2016%2F08%2F17%2F023423\" title=\"\u98fd\u304d\u305f\u3089\u3084\u3081\u3088\u3046Galois\u7406\u8ad6(6)\u2015\u5358\u62e1\u5927\u3067\u904a\u3076 - \u3089\u3093\u3060\u3080\u306a\u8a18\u61b6\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","blog_url":"https://randommemory.hatenablog.com/"}