{"author_url":"https://blog.hatena.ne.jp/derwind/","url":"https://randommemory.hatenablog.com/entry/2021/11/07/140025","title":"Sum \u30ce\u30fc\u30c9\u306e\u52fe\u914d","description":"\u30bc\u30ed\u3064\u304f 2 p.29 \u3092\u6398\u308a\u4e0b\u3052\u308b\u3002\u95a2\u6570 $f: \\R^n \\to \\R^1$\\begin{align*} f(x) = f(x_1, \\cdots, x_n) \\end{align*}\u3092\u8003\u3048\u308b\u3002\u66f4\u306b $g: \\R^1 \\to \\R^1$ \u304c\u3042\u308b\u6642\u3001\u5408\u6210 $g \\circ f$ \u306b\u3064\u3044\u3066\\begin{align*} (g \\circ f)(x) = g(f(x_1, \\cdots, x_n)) \\end{align*}\u3068\u66f8\u3051\u308b\u3002\u3053\u308c\u3092 $x_j$ \u306b\u3064\u3044\u3066 $x = a$ \u3067\u504f\u5fae\u5206\u3059\u308b\u3068\\begin{align*} \\frac{\\del (g \\circ f)}{\\del x_j} = \\f\u2026","type":"rich","blog_url":"https://randommemory.hatenablog.com/","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Frandommemory.hatenablog.com%2Fentry%2F2021%2F11%2F07%2F140025\" title=\"Sum \u30ce\u30fc\u30c9\u306e\u52fe\u914d - \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>","published":"2021-11-07 14:00:25","categories":["machine_learning"],"provider_name":"Hatena Blog","author_name":"derwind","width":"100%","image_url":null,"blog_title":"\u3089\u3093\u3060\u3080\u306a\u8a18\u61b6","height":"190","version":"1.0","provider_url":"https://hatena.blog"}