Alternative Equation Formats

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MathML

\begin{array}{rcl} {\hat{ρ}}_{i} = (\sum_{t = 2}^{T} {\hat{u}}_{i t} {\hat{u}}_{i, t - 1}) / (\sum_{t = 2}^{T} {\hat{u}}_{i, t - 1}^{2}) i = 1, 2, \dots, N \end{array}

Math Rendered as SVG

Math as LaTeX Source

\begin{eqnarray*} \hat{\rho }_{i}= \left(\sum _{t=2}^{T} \hat{u}_{it} \hat{u}_{i,t-1}\right) ~ \bigg/~ \left(\sum _{t=2}^{T}{\hat{u}^{2}_{i,t-1}}\right) \quad i=1, 2, \ldots , \emph{N} \nonumber \end{eqnarray*}