用 Mathematica 计算级数展开
[mathjax] 在看文章的时候总是能遇到各种计算问题，比如这个：求一个级数 (s(t))，使它在 (\infty) 处的 Taylor 展开具有形式：[\sum_{m\ge 2}\frac1{m}t^{-m}.] 手算验证当然费...
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校园、春天
今天天气不错，拿手机在校园里拍了几张照片。貌似iPhoto的水彩画风格不错！ 宁静的校园. more 明媚的阳光在小路上的投影. 过度水彩画以后的效果. 玉...
Fiddle around with Lambert W function
Title: Date: [mathjax] These days I was fiddling around with one particular parameterization for Lambert curve. Although it was not that hard, I was happy that finally I made it clear. The problem is like this: a Lambert curve is a curve given by [C = {(z,w) ; | ; z = w e^w } \subset \mathbb{C}^* \times \mathbb{C}^*.] Note that the above equation defines (w) as an implicit function of (z)....
Raabe 判别法与 Euler 算子
Raabe 判别法与 Euler 算子
利用热力学原理计算热床的极限温度