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Справка Scilab >> Polynomials > determ

determ

determinant of polynomial matrix

Syntax

res=determ(W [,k])

Arguments

W

real square polynomial matrix

k

integer (upper bound for the degree of the determinant of W)

Description

returns the determinant of a real polynomial matrix (computation made by FFT if W size is greater than 2*2).

res=determ(W [,k])k is an integer larger than the actual degree of the determinant of W.

The default value of k is the smallest power of 2 which is larger than n*max(degree(W)).

Method (Only if W size is greater than 2*2) : evaluate the determinant of W for the Fourier frequencies and apply inverse FFT to the coefficients of the determinant.

Examples

s=poly(0,'s');
w=s*rand(10,10);
determ(w)
det(coeff(w,1))*s^10

See also

  • det — determinant
  • detr — polynomial determinant
  • coffg — inverse of polynomial matrix
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Last updated:
Tue Feb 14 15:13:23 CET 2017