So I started off with an example that's pretty bad for this story, namely, Coke and Pepsi.

我以一个例子作为开始,一个不太恰当的例子,即,可口可乐和百事可乐

耶鲁公开课 - 博弈论课程节选

It's going to be /2 in the case where Coke and Pepsi cost exactly the same.

当可口可乐和百事可乐的价格一样时,销量将是/2

耶鲁公开课 - 博弈论课程节选

There's no Pepsi in the market and 1-P1 quantity of Coke is sold.

百事可乐卖不出去,可口可乐的销量是1-P1

耶鲁公开课 - 博弈论课程节选