{"url":"https://blog.ngtkana.com/entry/2026/07/24/003405","version":"1.0","author_url":"https://blog.hatena.ne.jp/ngtkana/","categories":[],"provider_name":"Hatena Blog","type":"rich","published":"2026-07-24 00:34:05","height":"190","author_name":"ngtkana","description":"\u5c0e\u5165 \u5f62\u5f0f\u7684\u51aa\u7d1a\u6570 $f(x) \\in k [ [ x ] ]$ \u306b\u5bfe\u3057\u3066\u3001$1 / f, \\ \\sqrt{f}, \\ \\exp{f}$ \u306a\u3069\u3092\u8a08\u7b97\u3059\u308b\u624b\u6cd5\u3068\u3057\u3066\u3001\u30cb\u30e5\u30fc\u30c8\u30f3\u6cd5\u304c\u3042\u308a\u307e\u3059\u306d\u3002\u3053\u308c\u306f\u6b32\u3057\u3044\u5f62\u5f0f\u7684\u51aa\u7d1a\u6570 $g(x) \\in k [ [ x ] ]$ \u3092\u3042\u308b\u65b9\u7a0b\u5f0f $\\varphi(g) = 0$ ($\\varphi$ \u3082\u5f62\u5f0f\u7684\u51aa\u7d1a\u6570)\u3067\u8868\u3057\u3066\u3001\u6f38\u5316\u5f0f $\\psi(g) = g - \\varphi(g) / \\varphi ' (g)$ \u306b\u3088\u3063\u3066\u7cbe\u5ea6\u3092\u500d\u3005\u306b\u3057\u3066\u3044\u304f (\u3064\u307e\u308a $\\varphi (g) \\in \\left ( x ^ d \\right )$ $\\implies$ $\\\u2026","image_url":null,"title":"\u5f62\u5f0f\u7684\u51aa\u7d1a\u6570\u306e\u30cb\u30e5\u30fc\u30c8\u30f3\u6cd5 (2\u6b21\u53ce\u675f\u6027\u306e\u8a3c\u660e)","provider_url":"https://hatena.blog","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fblog.ngtkana.com%2Fentry%2F2026%2F07%2F24%2F003405\" title=\"\u5f62\u5f0f\u7684\u51aa\u7d1a\u6570\u306e\u30cb\u30e5\u30fc\u30c8\u30f3\u6cd5 (2\u6b21\u53ce\u675f\u6027\u306e\u8a3c\u660e) - \u30d6\u30ed\u30b0\u540d\" 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://blog.ngtkana.com/","width":"100%","blog_title":"\u30d6\u30ed\u30b0\u540d"}