{"width":"100%","author_url":"https://blog.hatena.ne.jp/ushumpei/","height":"190","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fushumpei.hatenablog.com%2Fentry%2F2023%2F04%2F07%2F122258\" title=\"Lean4 \u5b66\u7fd23 - ushumpei\u2019s blog\" 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","blog_title":"ushumpei\u2019s blog","published":"2023-04-07 12:22:58","description":"Quantifiers and Equality \u306e\u6f14\u7fd2\u306b\u3066\u3001\u5e8a\u5c4b\u306e\u30d1\u30e9\u30c9\u30c3\u30af\u30b9\u3092\u793a\u3059\u554f\u984c\u304c\u3042\u3063\u305f\u3002\u3053\u308c\u306f\u6392\u4e2d\u5f8b\u3092\u4f7f\u7528\u3059\u308c\u3070\u3059\u3050\u306b\u89e3\u3051\u308b\u306e\u3060\u304c\u3001\u691c\u7d22\u3057\u3066\u307f\u308b\u3068\u69cb\u6210\u7684\u8a3c\u660e\u304c\u3042\u308b\u3068\u306e\u3053\u3068\u3067\u3001\u3084\u3063\u3066\u307f\u308b\u3068\u89e3\u3051\u305f\u3002 variable (men : Type) (barber : men) variable (shaves : men \u2192 men \u2192 Prop) example (h : \u2200 x : men, shaves barber x \u2194 \u00ac shaves x x) : False := let p := shaves barber barber have _ : p \u2194 \u00acp := h barb\u2026","version":"1.0","author_name":"ushumpei","provider_url":"https://hatena.blog","blog_url":"https://ushumpei.hatenablog.com/","image_url":null,"title":"Lean4 \u5b66\u7fd23","url":"https://ushumpei.hatenablog.com/entry/2023/04/07/122258","categories":[],"provider_name":"Hatena Blog"}