Alternative Equation Formats

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MathML

\begin{array}{rcl} σ_{t + d | t}^{2} = ω & + & \sum_{i = 1}^{d - 1} (α_{i} + ψ_{i} / 2) σ_{t + d - i | t}^{2} + \sum_{i = d}^{q} (α_{i} + 1_{ϵ_{t + d - i} < 0} ψ_{i}) ϵ_{t + d - i}^{2} \\ + & \sum_{j = 1}^{d - 1} γ_{j} σ_{t + d - j | t}^{2} + \sum_{j = d}^{p} γ_{j} h_{t + d - j} \end{array}

Math Rendered as SVG

Math as LaTeX Source

\begin{eqnarray*} {\sigma }^{2}_{t+d|t} = \omega & + & \sum _{i=1}^{d-1}{({\alpha }_{i}+\psi _{i}/2) {\sigma }^{2}_{t+d-i|t}} + \sum _{i=d}^{q}{({\alpha }_{i} + 1_{{\epsilon }_{t+d-i}<0} {\psi }_{i}) {\epsilon }_{t+d-i}^{2}} \\ & + & \sum _{j=1}^{d-1}{{\gamma }_{j}{\sigma }^{2}_{t+d-j|t} } + \sum _{j=d}^{p}{{\gamma }_{j} h_{t+d-j}} \end{eqnarray*}