Description Details Input Output Operators Functions Author(s) See Also

Implementation of class "polyMatrix" for storing a matrix of polynomials and implements basic matrix operations; including a determinant and characteristic polynomial. It is based on the package 'polynom' and uses a lot of its methods to implement matrix operations. This package includes 3 methods of triangularization of polynomial matrices: Extended Euclidean algorithm which is most classical but numerically unstable; Sylvester algorithm based on LQ decomposition; Interpolation algorithm is based on LQ decomposition and Newton interpolation. Both methods are described in D. Henrion & M. Sebek, Reliable numerical methods for polynomial matrix triangularization, IEEE Transactions on Automatic Control (Volume 44, Issue 3, Mar 1999, Pages 497-508) <doi:10.1109/9.751344> and in Salah Labhalla, Henri Lombardi & Roger Marlin, Algorithmes de calcule de la reduction de Hermite d'une matrice a coefficients polynomeaux, Theoretical Computer Science (Volume 161, Issue 1-2, July 1996, Pages 69-92) <doi:10.1016/0304-3975(95)00090-9>.

This package add transperent support of matrices of polynomials to **R** language.

low level input of matrix:

`polyMatrix()`

string ibpuy of polynomial:

`parse.polynomial()`

string input of matrix:

`parse.polyMatrix()`

Matrices of polynomials uses same format as numerical matrices

Basic arithmetic operations were implemented.

The most important matrix functions are implemented:

the determinant

`det()`

**Maintainer**: Nikolai Ryzhkov namezys@gmail.com (ORCID)

Authors:

Tamas Prohle prohlet@ludens.elte.hu

Peter Prohle prohlep@math.elte.hu

Ildiko Laszlo (ORCID)

Other contributors:

Ulas Onat Alakent [contributor]

Useful links:

Embedding an R snippet on your website

Add the following code to your website.

For more information on customizing the embed code, read Embedding Snippets.