{"author_url":"https://blog.hatena.ne.jp/kiririmode/","url":"https://kiririmode.hatenablog.jp/entry/20231229/1703859058","provider_url":"https://hatena.blog","published":"2023-12-29 23:10:58","image_url":null,"type":"rich","blog_title":"\u7406\u7cfb\u5b66\u751f\u65e5\u8a18","provider_name":"Hatena Blog","blog_url":"https://kiririmode.hatenablog.jp/","description":"\u30eb\u30d9\u30fc\u30b0\u7a4d\u5206\u3092\u5b66\u3076\u306b\u3042\u305f\u3063\u3066\u3001\u307e\u305a\u306f\u5b9a\u7fa9\u3092\u62bc\u3055\u3048\u3066\u304a\u304b\u306a\u3051\u308c\u3070\u8a71\u306b\u306a\u3089\u306a\u3044\u306e\u3067\u3001\u672c\u30a8\u30f3\u30c8\u30ea\u3067\u57fa\u672c\u7684\u306a\u3053\u3068\u3092\u307e\u3068\u3081\u3066\u304a\u304d\u307e\u3059\u3002 \u5b9a\u7fa9 $\\sigma$-\u52a0\u6cd5\u65cf \u7a7a\u9593$X$\u306e\u90e8\u5206\u96c6\u5408\u65cf$\\mathfrak{B}$\u304c\u6b21\u306e\u6761\u4ef6\u3092\u6e80\u305f\u3059\u6642\u3001$\\mathfrak{B}$\u3092$X$\u4e0a\u306e$\\sigma$-\u52a0\u6cd5\u65cf\u3068\u547c\u3076\u3002 $\\emptyset \\in \\mathfrak{B}$ $E \\in \\mathfrak{B} \\Rightarrow E^{C} \\in \\mathfrak{B}$ $E _{n} \\in \\mathfrak{B} \\;(n=1,2,\\cdots) \\Rightarrow \\displays\u2026","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fkiririmode.hatenablog.jp%2Fentry%2F20231229%2F1703859058\" title=\"\u30eb\u30d9\u30fc\u30b0\u7a4d\u5206\u306b\u81f3\u308b\u307e\u3067\u306e\u5404\u7a2e\u5b9a\u7fa9\u30fb\u7a4d\u5206\u306e\u5b9a\u7fa9 - \u7406\u7cfb\u5b66\u751f\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>","categories":["math"],"width":"100%","author_name":"kiririmode","version":"1.0","height":"190","title":"\u30eb\u30d9\u30fc\u30b0\u7a4d\u5206\u306b\u81f3\u308b\u307e\u3067\u306e\u5404\u7a2e\u5b9a\u7fa9\u30fb\u7a4d\u5206\u306e\u5b9a\u7fa9"}