Alternative Equation Formats

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MathML

\begin{array}{rcl} P (X_{i}) & = & \sum_{j = 1}^{n_{y}} (I (Y_{j} < X_{i}) + 0.5 I (Y_{j} = X_{i})) \\ P (Y_{j}) & = & \sum_{i = 1}^{n_{x}} (I (X_{i} < Y_{j}) + 0.5 I (X_{i} = Y_{j})) \end{array}

Math Rendered as SVG

Math as LaTeX Source

\begin{eqnarray*} P(X_ i) & = & \sum _{j=1}^{n_ y} \left( \, \mr{I}( Y_ j < X_ i ) ~ + ~ 0.5 ~ \mr{I}( Y_ j = X_ i) \, \right) \\ P(Y_ j) & = & \sum _{i=1}^{n_ x} \left( \, \mr{I}( X_ i < Y_ j ) ~ + ~ 0.5 ~ \mr{I}( X_ i = Y_ j) \, \right) \end{eqnarray*}