{"url":"https://randommemory.hatenablog.com/entry/2019/03/02/112740","author_name":"derwind","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Frandommemory.hatenablog.com%2Fentry%2F2019%2F03%2F02%2F112740\" title=\"\u81ea\u7136\u6570 - \u3089\u3093\u3060\u3080\u306a\u8a18\u61b6\" 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-other"],"version":"1.0","width":"100%","published":"2019-03-02 11:27:40","title":"\u81ea\u7136\u6570","description":"https://en.wikipedia.org/wiki/Set-theoretic_definition_of_natural_numbers#Definition_as_von_Neumann_ordinals https://en.wikipedia.org/wiki/Natural_number#Von_Neumann_ordinals von Neumann\u306b\u3088\u308b\u81ea\u7136\u6570\u306e\u69cb\u6210\u306f\u7b97\u8853\u306e\u516c\u7406\u2015\u6570\u5b66\u306e\u63a2\u7a76\u306b\u8f09\u3063\u3066\u305d\u3046\u3067\u3042\u3063\u305f\u3002","blog_url":"https://randommemory.hatenablog.com/","height":"190","author_url":"https://blog.hatena.ne.jp/derwind/","type":"rich","image_url":null,"provider_name":"Hatena Blog","provider_url":"https://hatena.blog","blog_title":"\u3089\u3093\u3060\u3080\u306a\u8a18\u61b6"}