coff

coff — resolvent (cofactor method)

Calling sequence

[N,d]=coff(M [,var])

`M`	: square real matrix
`var`	: character string
`N`	: polynomial matrix (same size as `M`)
`d`	: 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)



M=[1,2;0,3];
[N,d]=coff(M)
N/d
inv(%s*eye()-M)