{\displaystyle {\begin{array}{lcl}&X&{\overset {f}{\rightarrow }}&Z&\\&g\downarrow &&\downarrow g'\\&Y&{\underset {f'}{\… Moozonian · en.wikipedia.org Visit Source
{\displaystyle {\begin{array}{|c|c|c|}a&b&S\\\hline 0&0&1\\0&1&1\\1&0&1\\1&1&0\\\end{array}}} Moozonian · en.wikipedia.org Visit Source
{\displaystyle {\begin{array}{lcr}z&=&a\\f(x,y,z)&=&x+y+z\end{array}}} Moozonian · en.wikipedia.org Visit Source
{\displaystyle {\begin{array}{lcl}z&=&a\\f(x,y,z)&=&x+y+z\end{array}}} Moozonian · en.wikipedia.org Visit Source
