{"published":"2022-01-29 20:07:23","author_url":"https://blog.hatena.ne.jp/derwind/","blog_title":"\u3089\u3093\u3060\u3080\u306a\u8a18\u61b6","blog_url":"https://randommemory.hatenablog.com/","title":"\u96e2\u6563 Fourier \u5909\u63db","image_url":null,"author_name":"derwind","description":"\u96e2\u6563 Fourier \u5909\u63db\u306b\u3064\u3044\u3066\u78ba\u8a8d\u3057\u3066\u307f\u305f\u3044\u3002\u7c21\u5358\u306e\u305f\u3081\u9577\u3055 3 \u306e\u8907\u7d20\u6570\u5217 $\\{x_0, x_1, x_2\\}$ \u3092\u8003\u3048\u308b\u3002$$ \\begin{align*} y_m = \\sum_{k=0}^2 x_k e^{-2 \\pi i \\frac{mk}{3}},\\ 0 \\leq m \\leq 2 \\tag{1} \\end{align*} $$\u3068\u7f6e\u304f\u3002\u6b21\u306b $\\{y_0, y_1, y_2\\}$ \u3092\u7528\u3044\u3066$$ \\begin{align*} z_n = \\sum_{m=0}^2 y_m e^{2 \\pi i \\frac{nm}{3}},\\ 0 \\leq n \\leq 2 \\tag{2} \\en\u2026","type":"rich","version":"1.0","width":"100%","height":"190","categories":["math-other"],"provider_url":"https://hatena.blog","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Frandommemory.hatenablog.com%2Fentry%2F2022%2F01%2F29%2F200723\" title=\"\u96e2\u6563 Fourier \u5909\u63db - \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>","provider_name":"Hatena Blog","url":"https://randommemory.hatenablog.com/entry/2022/01/29/200723"}