Define Polynomial by Roots
Define a polynomial by its roots.
Poly(x)
x |
vector or square matrix, real or complex |
Computes the characteristic polynomial of an (n x n)-Matrix.
If x is a vector, Poly(x) is the vector of coefficients
of the polynomial whose roots are the elements of x.
Vector representing a polynomial.
In Matlab/Octave this function is called poly().
Poly(c(1, -1, 1i, -1i)) # Solves x^4 -1 = 0 # Wilkinson's example: roots(Poly(1:20))
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