Alternative Equation Formats

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MathML

\begin{array}{rcl} σ_{i, t}^{2} & = & c_{i} + \sum_{l = 1}^{q} (a_{i i, l} + 1_{ϵ_{i, t - l} < 0} b_{i i, l}) ϵ_{i, t - l}^{2} + \sum_{l = 1}^{p} g_{i i, l} σ_{i, t - 1}^{2} i = 1, \dots, k \end{array}

Math Rendered as SVG

Math as LaTeX Source

\begin{eqnarray*} \sigma _{i,t}^2 & =& c_ i + \sum _{l=1}^ q (a_{ii,l}+1_{\bepsilon _{i,t-l}<0} {b}_{ii,l}) \bepsilon ^2_{i,t-l} + \sum _{l=1}^ p {g_{ii,l} \sigma _{i,t-1}^2} ~ ~ ~ ~ i=1,\ldots , k\\ \end{eqnarray*}