{"blog_url":"https://dosei.hatenadiary.jp/","published":"2008-06-11 00:00:02","url":"https://dosei.hatenadiary.jp/entry/20080611/p2","provider_name":"Hatena Blog","provider_url":"https://hatena.blog","image_url":null,"html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fdosei.hatenadiary.jp%2Fentry%2F20080611%2Fp2\" title=\" \u76f4\u7dda\u306e\u30d1\u30e9\u30e1\u30bf\u7a7a\u9593 - DOSEI\u306e\u65e5\u8a18\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","author_url":"https://blog.hatena.ne.jp/DOSEI/","description":"\u5e73\u9762\u4e0a\u306e\u76f4\u7dda \u5e73\u9762 R2 \u4e0a\u306e\u76f4\u7dda\u306f, ax + by + c = 0 \u3068\u304b\u3051\u308b. \u3053\u308c\u3092 P2 \u4e0a\u3067\u8003\u3048\u308c\u3070, x := [x, y, w]\u22a4, l\u22a4 := [a, b, c] \u3068\u3059\u308b\u3068, l\u22a4 x = 0 \u3068\u304b\u3051\u308b\u306e\u3067, \u70b9\u3068\u76f4\u7dda\u306e\u53cc\u5bfe\u6027\u3092\u793a\u3059\u5f0f\u306b\u306a\u308b. \u7a7a\u9593\u4e0a\u306e\u76f4\u7dda R3 \u4e0a\u3067\u306f, \u5e73\u9762\u3068\u70b9\u306b\u95a2\u3057\u3066\u540c\u69d8\u306a\u6027\u8cea\u304c\u6210\u308a\u7acb\u3064\u304c, \u76f4\u7dda\u3067\u306f\u3046\u307e\u304f\u884c\u304b\u306a\u3044. \u3068\u3044\u3046\u304b, \u7a7a\u9593\u76f4\u7dda\u306f\u5e73\u9762\u306e\u3088\u3046\u306b1\u672c\u306e\u7dda\u578b\u306a\u5f0f\u3067\u306f\u66f8\u3051\u306a\u3044. \u3064\u307e\u308a, \u5c04\u5f71\u7a7a\u9593\u3067\u53cc\u5bfe\u6027\u304c\u767a\u63ee\u3067\u304d\u308b\u306e\u306f, \u70b9\u3068\u8d85\u5e73\u9762\u306e\u9593\u3060\u3051\u3067\u3042\u308b\u3002\uff08\u307b\u3093\u3068\u304b\u306a\uff09 Pl\u00fccker \u5ea7\u6a19 (\u30d7\u30ea\u30e5\u30c3\u30ab\u30fc\u2013) \u305d\u3053\u3067\u767b\u5834\u3059\u308b\u306e\u304c, Pl\u00fccker \u5ea7\u6a19\u3060. \u2026","categories":["\u30e1\u30e2","\u6570\u5b66"],"author_name":"DOSEI","type":"rich","blog_title":"DOSEI\u306e\u65e5\u8a18","width":"100%","title":" \u76f4\u7dda\u306e\u30d1\u30e9\u30e1\u30bf\u7a7a\u9593","height":"190","version":"1.0"}