{"version":"1.0","author_url":"https://blog.hatena.ne.jp/morita_non/","blog_title":"memo","description":"\u30d1\u30fc\u30b9\u306e\u6cd5\u5247\u304b\u3089coq\u3067\u6392\u4e2d\u5f8b\u3092\u5c0e\u304f\u3002 Theorem Peirce : forall A B : Prop, ((A -> B) -> A) -> A. Admitted. Theorem classic : forall p : Prop, ~~p -> p. Proof. unfold not. intros. apply (Peirce p False). intro. exfalso. apply H. apply H0. Qed.SoftwareFoundation\u8aad\u307f\u8fd4\u3057\u305f\u3089\u3001\u305d\u306e\u3082\u306e\u305a\u3070\u308a\u306e\u554f\u984c\u304c\u3042\u3063\u305f\u3002\u3067\u3082\u3001 Definition peirce := \u2200 P Q: Prop,\u2026","blog_url":"https://morita-non.hatenadiary.org/","type":"rich","width":"100%","image_url":null,"html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fmorita-non.hatenadiary.org%2Fentry%2F20140327%2F1395926917\" title=\"\u30d1\u30fc\u30b9\u306e\u5b9a\u7406 - memo\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","provider_name":"Hatena Blog","author_name":"morita_non","height":"190","title":"\u30d1\u30fc\u30b9\u306e\u5b9a\u7406","categories":[],"provider_url":"https://hatena.blog","url":"https://morita-non.hatenadiary.org/entry/20140327/1395926917","published":"2014-03-27 22:28:37"}