Alternative Equation Formats

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MathML

\begin{array}{rcl} {\tilde{σ}}_{(m, j)}^{2} = \frac{1}{n} \sum_{t = t_{0}}^{n} ({\tilde{z}}_{t} - \sum_{i = 1}^{m} ϕ_{i}^{(m, j)} {\tilde{z}}_{t - i} + \sum_{k = 1}^{j} θ_{k}^{(m, j)} {\hat{ϵ}}_{t - k}) \end{array}

Math Rendered as SVG

Math as LaTeX Source

\begin{eqnarray*} \tilde{\sigma }^2_{(m,j)} = \frac{1}{n} \sum _{t=t_0}^ n \left( \tilde{z}_ t - \sum _{i=1}^ m \phi _ i^{(m,j)} \tilde{z}_{t-i} + \sum _{k=1}^{j} \theta _ k^{(m,j)} \hat{\epsilon }_{t-k} \right) \nonumber \end{eqnarray*}