Ora, tenuto conto che
\begin{displaymath} \left( \begin{array}{ccc} x' & y' & 1 \end{array} \righ... ...left( \begin{array}{c} x'\\ y'\\ 1 \end{array} \right)=0. \end{displaymath} (1)


sostituendo ([*]) in ([*]), otteniamo:
\begin{displaymath} \left( \begin{array}{ccc} x' & y' & 1 \end{array} \righ... ...left( \begin{array}{c} x'\\ y'\\ 1 \end{array} \right)=0. \end{displaymath} (1)


(1)



Claudio Benizi 2002-10-08