poly(1)

NAME
poly - polynomial definition

CALLING SEQUENCE
[p]=poly(a,"x", ["flag"])

PARAMETERS

a   : matrix or real number

x   : symbolic variable

"flag"
    : string ("roots", "coeff")

DESCRIPTION
If a is a matrix, p is the characteristic polynomial i.e.
 determinant(x*eye-a), x being the symbolic variable.

If v is a vector, poly(v,"x",["roots"]) is the polynomial with roots the entries of v and "x" as formal variable. (In this case, roots and poly are inverse functions).

poly(v,"x","coeff") creates the polynomial with symbol "x" and with coefficients the entries of v. (Here poly and coeff are inverse functions).

s=poly(0,"s") is the seed for defining polynomials with symbol "s".

EXAMPLE
s=poly(0,"s");p=1+s+2*s^2;
A=rand(2,2);poly(A,"x")

SEE ALSO
coeff, matrices, rational