Definir GRAMO ( X , y ) = mi − ( X 2 + y 2 ) {\displaystyle {\mbox{G}}(x,y)=e^{-(x^{2}+y^{2})}}
F ( X , y ) = − 4 10 S ( X , y ) + 3 2 {\displaystyle f(x,y)=-{\tfrac {4}{10}}S(x,y)+{\tfrac {3}{2}}}
