I think there probably is one in there somewhere, but just in case, we have had two in class, there's one on the handout.

我记得讲义里好像讲了,以防万一,我们课堂上有两个定义,在其中一个讲义里面

耶鲁公开课 - 博弈论课程节选

Now that definition, if you're worried about what I've written down here and you want to see it in words, on the handout I've already put on the web that has the summary of the first class, I included this definition in words as well.

对于这个定义,如果你还有些疑问,而且你想看用文字表述的,在讲义中有,我已经上传到网上了,里面有第一节课的总结,也这个定义的文字形式

耶鲁公开课 - 博弈论课程节选