I want to derive the last result in another way, then I will stop, and that's pretty interesting because it tells you the use and abuse of calculus.

让我用其他方法解答最后一个问题,然后今天就到这 这是一个挺有意思的题,因为它展示了微积分的正确用法和错误用法

耶鲁公开课 - 基础物理课程节选

The point is that in this game in which firms competed in prices, even though there were only two firms in the market, only one firm more than monopoly, we get a dramatically different result than we had last time.

重点是这个公司进行价格竞争的博弈,尽管博弈中只有两家公司,仅仅比垄断情况下多了一家,我们得到了与上次完全不同的结果

耶鲁公开课 - 博弈论课程节选

The most important result from last time was that if you took this r, and you took two derivatives of this to find the acceleration, d^2 r over dt^2, try to do this in your head.

上节课最重要的结论,就是如果你把 r 写成这样,对 r 求两次导就能得到加速度,d^2 r / dt^2,心算一下

耶鲁公开课 - 基础物理课程节选