Alternative Equation Formats

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MathML

\begin{array}{rcl} U_{2} (\hat{β}) & = & \sum_{i = 1}^{n} (Z_{i} (X_{i}) - \bar{Z} (β, X_{i})) I (Δ_{i} ϵ_{i} = 1) \\ \hat{Ω} & = & - \frac{\partial U_{2} (\hat{β)}}{\partial β} = \sum_{i = 1}^{n} (\frac{S_{2}^{(2)} (\hat{β}, X_{i})}{S_{2}^{(0)} (\hat{β}, X_{i})} - {\bar{Z}}^{\otimes 2} (\hat{β}, X_{i})) I (Δ_{i} ϵ_{i} = 1) \end{array}

Math Rendered as SVG

Math as LaTeX Source

\begin{eqnarray*} \bU _2(\hat{\bbeta }) & =& \sum _{i=1}^ n \biggl (\bZ _ i(X_ i) - \bar{\bZ }(\bbeta ,X_ i) \biggr ) I(\Delta _ i\epsilon _ i=1) \\ \hat{\bOmega } & =& -\frac{\partial \bU _2(\hat{\bbeta )}}{\partial \bbeta } = \sum _{i=1}^ n \left( \frac{\bS _2^{(2)}(\hat{\bbeta }, X_ i)}{S_2^{(0)}(\hat{\bbeta },X_ i)} - \bar{\bZ }^{\otimes 2}(\hat{\bbeta },X_ i) \right) I(\Delta _ i\epsilon _ i=1) \end{eqnarray*}