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44 Challenging problems. Many are quite difficult, and tests if your physics understand is solid enough!
昨天看了一套教人深思的電影 - 〈Three Idiots〉，故與大家分享一下。快樂、生活、學習，其實都可以是很簡單的。
http://www.tudou.com/programs/view/h5RvIAx0sTU/
This is what education truly mean, to have fun and excitement during the pursuit of excellence.
Unblock me is a puzzle game in iphone. It's originated from rush hour. I am interested in solving the board game using computer. I can enter the board configuration into the computer one by one, but I would like to do it automatically. With image processing capatibability in Mathematica, the process can be done rather easily by taking screenshot.
A package is released as open source project in GoogleCode/MathOO-packages. The aim of the project is to provide basic utilities and basic classes using MathOO, so that you can use it in an object oriented way. In the initial release, 1.0b, a dictionary class (associated array) is provided.
This document is a documentation of the dict class in MathOO-packages. Basically it behaviors very similarly to Python dict.
Code is provided to benchmark the performance of MathOO.
Mathematica is a very useful software in many science fields. It supports procedural programming and functional programming. However, it does not support the modern object oriented programming. If you would like to add that, there is a package called Objectica, and it will cost you quite a fortune ($1000 on 3/11/2010).
Here I have developed a Mathematica ...
The problem that I am having is like this(a forward of this post). If I define a numerical function in Mathematica:
As you can see that F(x) is just 1/x. However, I just would like to illustrate the point with a simple example.
If I solve a differential equation numerically involving F(x), I would get errors: ...