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Справка Scilab >> Polynomials > coffg

coffg

inverse of polynomial matrix

Syntax

[Ns,d]=coffg(Fs)

Arguments

Fs

square polynomial matrix

Description

coffg computes Fs^-1 where Fs is a polynomial matrix by co-factors method.

Fs inverse = Ns/d

d = common denominator; Ns = numerator (a polynomial matrix)

(For large matrices,be patient...results are generally reliable)

Examples

s=poly(0,'s')
a=[ s, s^2+1; s  s^2-1];
[a1,d]=coffg(a);
(a1/d)-inv(a)

See also

  • determ — determinant of polynomial matrix
  • detr — polynomial determinant
  • invr — inversion of (rational) matrix
  • penlaur — Laurent coefficients of matrix pencil
  • glever — inverse of matrix pencil
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Last updated:
Tue Feb 14 15:13:23 CET 2017