Math

Does our approach to teaching math fail even the smartest kids

Here’s why the math education your children need is most likely not what their school is teaching. by: Carol Lloyd | February 3, 2016  Print article As sure as one plus one equals two, it happens year after year. Kids who have been bringing home A’s in chemistry and acing AP Calculus arrive at college with visions of STEM careers dancing in their heads. Then they hit an invisible, but very painful, wall. According to research from the University of California, Los Angeles, as many as 60 percent of all collegeRead More

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The House Always Wins

Twitter Ed Thorp used math to become the first person to beat the casinos at blackjack. Then he changed the way Wall Street thinks about investing. RACHEL MARTIN, HOST: The card game blackjack has been around a long time. But until Ed Thorp came along, no one had figured out how to beat it. Thorp has just written a book called “A Man For All Markets” about how he did just that. He beat blackjack and then he went on to transform the world of investing. Jacob Goldstein of ourRead More

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数学家聚首牛津尝试破解望月新一的神秘数学证明

数学家聚首牛津尝试破解望月新一的神秘数学证明 2015/12/21 Derived Image. Original Image Credit: Kanijoman 你为什么需要这则新闻 一批数学......

中国数学界扫地僧:当过服务生 蛰伏30年拿遍荣誉

中国数学界扫地僧:当过服务生 蛰伏30年拿遍荣誉 作者 大脸 2016-11-07 10:27:30 有这样一个华人数学家, 他解决了素数分布领域的“孪生素数猜想”,被认为可能超过数学家陈景润的......

An Introduction to Gradient Descent and Linear Regression

http://spin.atomicobject.com/2014/06/24/gradient-descent-linear-regression/ Gradient descent is one of those “greatest hits” algorithms that can offer a new perspective for solving problems. Unfortunately, it’s rarely taught in undergraduate computer science programs. In this post I’ll give an introduction to the gradient descent algorithm, and walk through an example that demonstrates how gradient descent can be used to solve machine learning problems such as linear regression. At a theoretical level, gradient descent is an algorithm that minimizes functions. Given a function defined by a set of parameters, gradient descent starts with an initial set ofRead More

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Tip: Using surf and meshgrid to create surface plots

https://www.cac.cornell.edu/vw/matlab/tips7.aspx To complement its two-dimensional line plots, MATLAB also provides the ‘surf’ function for making three-dimensional (surface) plots. Plots of this sort are useful in many areas of science and engineering, in particular for making diagrams and teaching simple concepts in optimization and vector calculus. Unfortunately, creating surface plots has not always been completely straightforward in MATLAB, and actually required the helper function ‘meshgrid’ in order to work correctly. Newer versions have ameliorated some of this difficulty by accepting vector input arguments, but here we will describe the “classic” wayRead More

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新加坡一数学题震惊西方网民 国人:是五年级题目

新加坡数学题的中文版 答题思路 新加坡一道为十五六岁学生设计的奥数题被人放上网,不料惹得西方国家网民绞尽脑汁争相答题。许多人惊呼,新加坡孩子竟然要做这么难的数学题啊! 全球网民踊跃答题 值得注意......