resolvent (cofactor method)
[N,d]=coff(M [,var])
square real matrix
character string
polynomial matrix (same size as M)
polynomial (characteristic polynomial poly(A,'s'))
coff computes R=(s*eye()-M)^-1 for M a real matrix.
R is given by N/d.
N = numerator polynomial matrix.
d = common denominator.
var character string ('s' if omitted)