$$ A=\left(\begin{array}{rrr} {1} & {-7 / 4} & {-1 / 4} \\ {3} & {1} & {-1} \\ {-4} & {1 / 4} & {-1 / 4} \end{array}\right) $$
Will von dieser Matrix L und R bestimmen.
Nun mein erster Schritt ist folgende Permuationsmatrix zu benutzen
$$ P1=\left(\begin{array}{rrr} {0} & {0} & {1} \\ {0} & {1} & {0} \\ {1} & {0} & {0} \end{array}\right) $$
$$ M1=\left(\begin{array}{rrr} {-4} & {1/4} & {-1/4} \\ {3} & {1} & {0} \\ {1} & {-7/4} & {-1/4} \end{array}\right) $$ $$ L1=\left(\begin{array}{rrr} {1} & {0} & {0} \\ {3/4} & {1} & {0} \\ {1/4} & {0} & {1} \end{array}\right) $$ $$ M2=\left(\begin{array}{rrr} {1} & {0} & {0} \\ {0} & {19/16} & {-19/16} \\ {0} & {-27/16} & {1} \end{array}\right) $$ $$ P2=\left(\begin{array}{rrr} {1} & {0} & {0} \\ {0} & {0} & {1} \\ {0} & {1} & {0} \end{array}\right) $$ $$ M3=\left(\begin{array}{rrr} {1} & {0} & {0} \\ {0} & {-27/16} & {1} \\ {0} & {19/16} & {-19/16} \end{array}\right) $$ $$ L2=\left(\begin{array}{rrr} {1} & {0} & {0} \\ {0} & {1} & {0} \\ {0} & {19/27} & {1} \end{array}\right) $$
Wie komme ich jetzt auf L und R ?