{"id":169,"date":"2025-08-29T05:00:00","date_gmt":"2025-08-28T20:00:00","guid":{"rendered":"https:\/\/yamamath.org\/?p=169"},"modified":"2025-08-14T15:04:37","modified_gmt":"2025-08-14T06:04:37","slug":"1087_4%e3%81%a4%e3%81%ae%e4%b8%89%e8%a7%92%e5%bd%a2%e3%81%ae%e3%83%9d%e3%83%aa%e3%83%aa%e3%83%b3%e3%82%af","status":"publish","type":"post","link":"https:\/\/yamamath.org\/?p=169","title":{"rendered":"1087_4\u3064\u306e\u4e09\u89d2\u5f62\u306e\u30dd\u30ea\u30ea\u30f3\u30af"},"content":{"rendered":"\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"577\" height=\"513\" src=\"https:\/\/yamamath.org\/wp-content\/uploads\/2025\/08\/coxeter-4triangles-small.jpg\" alt=\"\" class=\"wp-image-170\" srcset=\"https:\/\/yamamath.org\/wp-content\/uploads\/2025\/08\/coxeter-4triangles-small.jpg 577w, https:\/\/yamamath.org\/wp-content\/uploads\/2025\/08\/coxeter-4triangles-small-300x267.jpg 300w\" sizes=\"auto, (max-width: 577px) 100vw, 577px\" \/><\/figure>\n\n\n\n<p>\u3000coxeter-4triangles-small.jpg<br>\u3000&#8212;&#8211; * &#8212;&#8211; * &#8212;&#8211;<\/p>\n\n\n\n<figure class=\"wp-block-embed\"><div class=\"wp-block-embed__wrapper\">\nhttps:\/\/www.georgehart.com\/orderly-tangles-revisited\/tangles.htm\u306b\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u8ad6\u6587\u304c\u8f09\u3063\u3066\u3044\u307e\u3059\u3002\n<\/div><\/figure>\n\n\n\n<p>\u79e9\u5e8f\u3042\u308b\u7d61\u307f\u5408\u3044\u306e\u518d\u8003\uff1a\u30b8\u30e7\u30fc\u30b8\u30fbW\u30fb\u30cf\u30fc\u30c8<\/p>\n\n\n\n<p>\u3053\u308c\u306f\u30012005\u5e747\u670831\u65e5\u304b\u30898\u67083\u65e5\u306b\u30a2\u30eb\u30d0\u30fc\u30bf\u5dde\u30d0\u30f3\u30d5\u3067\u958b\u50ac\u3055\u308c\u305f\u300c\u30eb\u30cd\u30c3\u30b5\u30f3\u30b9\u30fb\u30d0\u30f3\u30d5\uff1a\u30d6\u30ea\u30c3\u30b8\u30ba\uff0b\u30b3\u30af\u30bb\u30bf\u30fc\u30fb\u30c7\u30fc\u300d\u306e\u8b70\u4e8b\u9332\u306b\u63b2\u8f09\u3055\u308c\u305f\u79c1\u306e\u8ad6\u6587\u3092\u30a6\u30a7\u30d6\u5316\u3057\u305f\u30d0\u30fc\u30b8\u30e7\u30f3\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u3000\u3000\u3000\u3000\u3000\u3000Orderly Tangles Revisited &#8212; George W. 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