Alternative Equation Formats

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MathML

\begin{array}{rcl} δ_{x, y}^{j} & = & 1, i f e i t h e r x_{j} o r y_{j} i s p r e s e n t \\ δ_{x, y}^{j} & = & 0, i f b o t h x_{j} a n d y_{j} a r e a b s e n t \end{array}

Math Rendered as SVG

Math as LaTeX Source

\begin{eqnarray*} \delta _{x,y}^ j & =& 1 \mr{,\ if\ either \ } x_ j \mr{\ or\ } y_ j \mr{\ is\ present}\\ \delta _{x,y}^ j & =& 0 \mr{,\ if\ both \ } x_ j \mr{\ and\ } y_ j \mr{\ are\ absent} \end{eqnarray*}