發送短信 : Theorem Proving in Higher Order Logics
______ _ _ _ _ ______ ______ /_ _// | || | || | \ / || /_ _// /_ _// | || | || | || | \/ || -| ||- `-| |,- _| || | \\_/ || | . . || _| ||_ | || /__// \____// |_|\/|_|| /_____// |_|| `--` `---` `-` `-` `-----` `-`'