{"provider_url":"https://hatena.blog","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fintegers.hatenablog.com%2Fentry%2F2017%2F08%2F30%2F014113\" title=\"Brocard-Ramanujan\u65b9\u7a0b\u5f0f - INTEGERS\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","type":"rich","categories":["\u6574\u6570","\u6574\u6570-25","\u6574\u6570-121","\u6574\u6570-5041"],"provider_name":"Hatena Blog","image_url":"https://cdn-ak.f.st-hatena.com/images/fotolife/i/integers/20170816/20170816181312.png","published":"2017-08-30 01:41:13","url":"https://integers.hatenablog.com/entry/2017/08/30/014113","title":"Brocard-Ramanujan\u65b9\u7a0b\u5f0f","height":"190","author_name":"integers","description":"\u65b9\u7a0b\u5f0f\u306e\u6b63\u6574\u6570\u89e3\u306f\u3057\u304b\u77e5\u3089\u308c\u3066\u3044\u307e\u305b\u3093\u30021876\u5e74\u53ca\u30731885\u5e74\u306bBrocard\u304c\u30011913\u5e74\u306bRamanujan\u304c\u3053\u306e\u65b9\u7a0b\u5f0f\u3092\u6271\u3063\u3066\u3044\u307e\u3059\u3002Erd\u0151s\u306f\u3053\u308c\u3089\u4ee5\u5916\u306b\u89e3\u306f\u5b58\u5728\u3057\u306a\u3044\u3068\u4e88\u60f3\u3057\u3066\u3044\u308b\u305d\u3046\u3067\u3059\u3002\u5b9a\u7406 (Overholt, 1993) ABC\u4e88\u60f3\u304c\u6b63\u3057\u3044\u3068\u4eee\u5b9a\u3059\u308b\u3002\u3053\u306e\u3068\u304d\u3001Brocard-Ramanujan\u65b9\u7a0b\u5f0f\u306f\u6b63\u6574\u6570\u89e3\u3092\u9ad8\u3005\u6709\u9650\u500b\u3057\u304b\u6301\u305f\u306a\u3044\u3002\u8a3c\u660e. \u3068\u3057\u3001\u3067\u3042\u308b\u3068\u3059\u308b\u3002\u3053\u306e\u3068\u304d\u3001\u306f\u5947\u6570\u306a\u306e\u3067\u3001\u3068\u304a\u304f\u3068\u3001\u30fb\u304c\u6210\u308a\u7acb\u3064*1\u3002\u30fbChebyshev\u306e\u5b9a\u7406\u3088\u308a\u3001\u6216\u308b\u5b9a\u6570\u304c\u5b58\u5728\u3057\u3066\u304c\u6210\u308a\u7acb\u3064(\u306f\u7d20\u6570)\u3002\u30fb\u3092\u4e00\u3064\u3068\u3063\u3066\u56fa\u5b9a\u3059\u308b\u3002\u3053\u306e\u3068\u304d\u3001\u304c\u5b58\u5728\u3057\u3066\u3001\u4efb\u610f\u306eABC\u30c8\u30ea\u30d7\u30eb\u306b\u5bfe\u3057\u3066\u304c\u6210\u308a\u7acb\u3064\u3002\u305f\u2026","blog_title":"INTEGERS","width":"100%","author_url":"https://blog.hatena.ne.jp/integers/","version":"1.0","blog_url":"https://integers.hatenablog.com/"}