Gradient Field
Gradient Field: a better way to interpret
Recent Posts
Vector Space / Vector Field / Scalar Field /
Vector Space
Harmonic Function / Laplace’s equation
harmonic 这个词的意思太多了，比如在 periodic signals 里翻译成 “谐波”。而 Harmonic Function 的翻译是 “调和函数”
Closed-Form Solution
P.S. 讲了这么多，其实 closed-form expression 就是 “解析解”，analytic expression。这两者其实有微妙的差别，但大体上你理解成是同一事物是 OK 的。而且你还能见到 “analytic closed-form solution” 这种表达方式，真的不需要 care 太...
Jekyll: Liquid cannot handle numeric tags
This is funny.
G. Polya’s generalized problem solving approach
Quote from How To Solve by George Polya.
RBF (Radial Basis Function) Kernel
知道了 Radial basis function 和 kernel function 之后，Radial basis function kernel 就好理解了：它是一个 kernel function，然后属于 radial basis function 大类。
Hypothesis Space / Underfitting / Overfitting / Bias / Variance
Hypothesis Space
Kernel in Linear Algebra / Inner Product Space / Hyperplane / SVM / Kernel Function / Normed vector space / Metric Space
$$ \newcommand{\icol}[1]{ \bigl[ \begin{smallmatrix} #1 \end{smallmatrix} \bigr] }