Alternative Equation Formats

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MathML

\begin{array}{rcl} V^{(1)} (t) & = & (\sum_{j = 1}^{n} e^{{\hat{β}}^{'} ξ_{j}} \hat{S} (t, ξ_{j}))^{2} \sum_{t_{i} \leq t} \frac{d (t_{i})}{[S^{(0)} (\hat{β}, t_{i})]^{2}} \\ V^{(2)} (t) & = & (\sum_{j = 1}^{n} \hat{S} (t, ξ_{j}) H (t, ξ_{j}))^{'} [I (\hat{β})]^{- 1} (\sum_{j = 1}^{n} \hat{S} (t, ξ_{j}) H (t, ξ_{j})) \end{array}

Math Rendered as SVG

Math as LaTeX Source

\begin{eqnarray*} V^{(1)}(t)& =& \biggl ( \sum _{j=1}^ n \mr{e}^{\hat{\bbeta }'\bxi _ j} \hat{S}(t,\bxi _ j) \biggr )^2 \sum _{t_ i\leq t} \frac{d(t_ i)}{[S^{(0)}(\hat{\bbeta },t_ i)]^2} \\ V^{(2)}(t)& =& \biggl (\sum _{j=1}^ n \hat{S}(t,\bxi _ j)H(t,\bxi _ j)\biggr )' \biggl [\mc{I}(\hat{\bbeta }) \biggr ]^{-1} \biggl (\sum _{j=1}^ n \hat{S}(t,\bxi _ j) H(t,\bxi _ j) \biggr ) \end{eqnarray*}