I'm going to start this lecture with a discussion of how one constructs a portfolio and what are the mathematics of it.

首先我想讲讲,怎样建立一个投资组合,以及与其有关的数学问题。

耶鲁公开课 - 金融市场课程节选

And in particular, I'm going to cheat slightly I'm going to use a little bit of abusive mathematics, but I'm going to show you a trick to figure it out.

尤其要说明的是,我会有一点不属实在里面,我会滥用一点数学，但是,我会教会你们这个小把戏的。

麻省理工公开课 - 计算机科学及编程导论课程节选