No.5 Markdown 文章测试
MarkDown MathJax双解析测试
MarkDown
$ \sigma2=E(u_t2)=\alpha_t+\alpha_1 u_t $
$ \sigma2=E(u_t2)=\alpha_{t-1}+\alpha_1 u_t $
$ \sigma2=E(u_t2)=\alpha_{t-1}+\alpha_1 u_{t-1} $
Inline equation: \(a^2 + b^2 = c^2\)
$\alpha_{t-1} u_{t+k} = \beta $