{"id":610,"date":"2026-01-07T05:00:00","date_gmt":"2026-01-06T20:00:00","guid":{"rendered":"https:\/\/yamamath.org\/?p=610"},"modified":"2026-01-07T06:58:15","modified_gmt":"2026-01-06T21:58:15","slug":"1147_%e3%82%a6%e3%82%a7%e3%82%a4%e3%83%90%e3%83%83%e3%82%af%e3%83%9e%e3%82%b7%e3%83%b3","status":"publish","type":"post","link":"https:\/\/yamamath.org\/?p=610","title":{"rendered":"1147_\u30a6\u30a7\u30a4\u30d0\u30c3\u30af\u30de\u30b7\u30f3"},"content":{"rendered":"\n<p>\u3000s-640Wayback Machine_\u56fd\u7acb\u56fd\u4f1a\u56f3\u66f8\u9928\u306e\u8aac\u660e.jpg<br>\u3000&#8212;&#8211; * &#8212;&#8211; * &#8212;&#8211;<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"569\" src=\"http:\/\/yamamath.org\/wp-content\/uploads\/2025\/12\/s-640Wayback-Machine_\u56fd\u7acb\u56fd\u4f1a\u56f3\u66f8\u9928\u306e\u8aac\u660e.jpg\" alt=\"\" class=\"wp-image-611\" srcset=\"https:\/\/yamamath.org\/wp-content\/uploads\/2025\/12\/s-640Wayback-Machine_\u56fd\u7acb\u56fd\u4f1a\u56f3\u66f8\u9928\u306e\u8aac\u660e.jpg 640w, https:\/\/yamamath.org\/wp-content\/uploads\/2025\/12\/s-640Wayback-Machine_\u56fd\u7acb\u56fd\u4f1a\u56f3\u66f8\u9928\u306e\u8aac\u660e-300x267.jpg 300w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><\/figure>\n\n\n\n<p>\u3000riviere \u6c0f\u304b\u3089\u6559\u3048\u3066\u3044\u305f\u3060\u3044\u305f\u30ea\u30f3\u30af\u304c\u3069\u306e\u3088\u3046\u306b\u3057\u3066\u3067\u304d\u3066\u3044\u308b\u306e\u304b\u3092\u8003\u3048\u3066\u3044\u307e\u3057\u305f\u3002Internet Archive\u3000\u300c\u56fd\u7acb\u56fd\u4f1a\u56f3\u66f8\u9928\u306e\u8aac\u660e\u300d\u304c\u7684\u3092\u5c04\u305f\u8aac\u660e\u306e\u3088\u3046\u3067\u3057\u305f\u306e\u3067\u5148\u982d\u56f3\u306b\u793a\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u3000&#8212;&#8211; * &#8212;&#8211; * &#8212;&#8211;<\/p>\n\n\n\n<p>\u3000\u305d\u3046\u3044\u3048\u3070\u300c\u83f1\u5f62\u5341\u4e8c\u9762\u4f53\u306e\u661f\u5f62\u300d\u3092\u8003\u3048\u3066\u3044\u308b\u9803\u306b\u3082\u4f55\u56de\u304b\u5229\u7528\u3057\u305f\u3053\u3068\u304c\u3042\u308a\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<p>\u3000\u3000s-640 Internet Archive_\u83f1\u5f62\u5341\u4e8c\u9762\u4f53\u306e\u661f\u5f62.jpg<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"217\" src=\"https:\/\/yamamath.org\/wp-content\/uploads\/2025\/12\/s-640-Internet-Archive_\u83f1\u5f62\u5341\u4e8c\u9762\u4f53\u306e\u661f\u5f62.jpg\" alt=\"\" class=\"wp-image-616\" srcset=\"https:\/\/yamamath.org\/wp-content\/uploads\/2025\/12\/s-640-Internet-Archive_\u83f1\u5f62\u5341\u4e8c\u9762\u4f53\u306e\u661f\u5f62.jpg 640w, https:\/\/yamamath.org\/wp-content\/uploads\/2025\/12\/s-640-Internet-Archive_\u83f1\u5f62\u5341\u4e8c\u9762\u4f53\u306e\u661f\u5f62-300x102.jpg 300w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><\/figure>\n\n\n\n<p>\u3000&#8212;&#8211; 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