测试中文

Test
测试一下
如果想发布中文，必须用utf-8编码。

$$ \def\ud{\mathrm{d}} \def\RR{\bf R} \def\bold#1{\bf #1}$$

$x > 0$
$$ \left(r,r\right) $$
$$ < r,r > $$
When $a \ne 0$, there are two solutions to (ax^2 + bx + c = 0) and they are
$$x = {-b \pm \sqrt{b^2-4ac} \over 2a}.$$

$$\mathbf{V}_1 \times \mathbf{V}_2 = \begin{vmatrix} \mathbf{i} & \mathbf{j} & \mathbf{k} \\ \frac{\partial X}{\partial u} & \frac{\partial Y}{\partial u} & 0 \\ \frac{\partial X}{\partial v} & \frac{\partial Y}{\partial v} & 0 \end{vmatrix}$$ $$1 + \frac{q^2}{(1-q)}+\frac{q^6}{(1-q)(1-q^2)}+\cdots = \prod_{j=0}^{\infty}\frac{1}{(1-q^{5j+2})(1-q^{5j+3})}, \quad\quad \text{for $|q|1$}.$$ $$f(x) = {\frac{1}{\sigma \sqrt{2\pi}} } e^{- \frac{(x-\mu )^2 }{ 2\sigma^2}} \\\\ \Phi(x) = \int_{-\infty}^{x} {\frac{1}{\sigma \sqrt{2\pi}} } e^{- \frac{(t-\mu )^2 }{ 2\sigma^2}} \ud t$$

Flory
$$ < r,r > ^{\frac{1}{2}} = \left(\frac{1}{2}\right)^{\frac{1}{5}}aN^{\frac{3}{5}}$$

对于尖括号，必须在两端加空格，或者用’\lt’或’<’代替：
$$ < \lt < > \gt > $$

带下标的公式必须用block $P(X_t| Y_{1:t-1})$

$$\begin{equation} f(x) = {\frac{1}{\sigma \sqrt{2\pi}} } e^{- \frac{(x-\mu )^2 }{ 2\sigma^2}} \end{equation}$$

MathJax 官方文档说明：
http://docs.mathjax.org/en/latest/tex.html

Code Test

HelloWorld.c My_blog

#include <iostream>

using namespace std;

int main() {
    return 0;
}