Just a quick check and this is not for the camera, how many of you have seen Bertrand competition before?

我们迅速了解一下,这不是为了录影,你们谁之前学过伯川德竞争

耶鲁公开课 - 博弈论课程节选

And again, anytime I'm doing algebra on the board, someone should check me at home, so just have a quick look at that. Is that right?

还有,每回我在黑板上演算,你们都帮我检查一下,看看有没有算错,这次算对了吗

耶鲁公开课 - 博弈论课程节选