Polynomials {dse} R Documentation

## Polynomial Utilities

### Description

Polynomial utility functions used by DSE.

### Usage

    characteristicPoly(a)
companionMatrix(a)
polyvalue(coef, z)
polydet(a)
polyprod(a, b)
polysum(a, b)
polyrootDet(a)


### Arguments

 a An array representing a matrix polynomial. b An array representing a matrix polynomial. coef Coefficients of a polynomial. z Value at which the polynomial is to be evaluated.

### Details

These are utility functions used in some ARMA model calculations such as root and stability calculations.

### Value

depends

polyroot roots stability