Alternative Equation Formats

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MathML

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

Math Rendered as SVG

Math as LaTeX Source

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