{"blog_url":"https://randommemory.hatenablog.com/","title":"\u98fd\u304d\u305f\u3089\u3084\u3081\u3088\u3046Galois\u7406\u8ad6(27)\u2015\u5177\u4f53\u4f8b","width":"100%","image_url":null,"html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Frandommemory.hatenablog.com%2Fentry%2F2016%2F09%2F05%2F000247\" title=\"\u98fd\u304d\u305f\u3089\u3084\u3081\u3088\u3046Galois\u7406\u8ad6(27)\u2015\u5177\u4f53\u4f8b - \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>","type":"rich","published":"2016-09-05 00:02:47","height":"190","description":"\u306a\u3093\u3060\u304b\u3088\u304f\u5206\u304b\u3089\u306a\u304f\u306a\u3063\u3066\u304d\u305f\u306e\u3067\u3001\u5177\u4f53\u4f8b\u3092\u898b\u3066\u3044\u304f\u3002$A$: \u74b0, $B$: $A$-\u4ee3\u6570\u3068\u3057\u3066\u3001 $A[X]$ \u306e\u4fc2\u6570\u74b0\u3092base change\u3059\u308b\u3002 $B \\otimes_A A[X] \\simeq B[X]$ \u3092\u898b\u305f\u3044\u3002 \\begin{array}{rccc} \\varphi: &A[X] &\\to &B \\otimes_A A[X] \\\\ &X^n &\\mapsto &1 \\otimes_A X^n \\end{array}\u3092\u8003\u3048\u308b\u3053\u3068\u3067\u3001 $\\{ 1 \\otimes 1, 1 \\otimes X, \\cdots, 1 \\otimes X^n, \\cdots \\}$ \u304c $B \\ot\u2026","url":"https://randommemory.hatenablog.com/entry/2016/09/05/000247","author_url":"https://blog.hatena.ne.jp/derwind/","author_name":"derwind","provider_name":"Hatena Blog","provider_url":"https://hatena.blog","categories":["math-alg"],"version":"1.0","blog_title":"\u3089\u3093\u3060\u3080\u306a\u8a18\u61b6"}