Description Usage Arguments Value Author(s)

Compute the product of two polynomial matrices

1 | ```
Mtxprod(Mtx, sMtx, p, P)
``` |

`Mtx` |
The coefficient matrix of a regular polynomial matrix |

`sMtx` |
The coefficient matrix of a seasonal polynomial matrix |

`p` |
Degree of the regular polynomial matrix |

`P` |
Degree of the seasonal polynomial matrix |

Coefficient matrix of the product. The product is in the form reg-AR * sAR, etc.

Ruey S. Tsay

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