CHAR_MATRIX _ _ _ _ _ _ _ _ _ _ _ _ operator

syntax:

<matrix> :- a square matrix. <lambda> :- a symbol or algebraic expression.

<char\_matrix> creates the characteristic matrix C of <matrix>.

This is C = <lambda> * Id - A. Id is the identity matrix.

examples:

char_matrix(A,x); 

  [x - 1   -2     -3  ]
  [                   ]
  [ -4    x - 5   -6  ]
  [                   ]
  [ -7     -8    x - 9]

Related functions: char_poly.