Gerald Lambeau: Mod f-x-square, d-x. So please finish Percival for next time. I know many of you had this as undergraduates, but it won't hurt to brush up. Thank you, Steven. I also put an advanced Fourier system on the main hallway chalkboard. I'm hoping that one of you might prove it by the end of the semester. Now the person to do so will not only bein my good graces but also go on to fame and fortune by having their accomplishment recorded and their name printed in the auspicious MIT Tech. Former winners include Nobel laureates, Field's Medal winners, renowned astrophysicists and lowly MIT professors. Well, that's all. If you have any questions, I'm sure that Tom has the answers.
妙语佳句,活学活用
1. Mod f-x-square, d-x
Mod 是数学中的取余函数,就是取两个数的余数,比如:
mod(10,3) 结果为1
mod(10,-3) 结果为-2
mod(-10,-3) 结果为-1
mod(-10,3) 结果为2
mod ︳f(x)︳2 结果为dx。
2. brush up
这里的意思是“review, refresh one's memory 复习”的意思,也写作brush up on,比如:Nell brushed up on her Spanish before going to Honduras.内尔在去洪都拉斯前复习了一下她的西班牙语。
3. Fourier system
傅立叶(Fourier, Jean Baptiste Joseph, 1768-1830),是傅立叶级数(三角级数)创始人。他是
这个片语的意思是“in someone's favor or good opinion 受到某人的宠爱”,也可以表示为 in someone's good books / in the good graces of,比如:Ruth is back in her mother's good graces. 鲁斯重新得到了妈妈的宠爱。