Creates an object of a polyadic class.

## Syntax

    p=polyadic(cores)


## Description

A polyadic is a matrix formed by a Kronecker product, with those products stored unopened. For example,

                       cores={{A,B,C},{D,E}}


corresponds to A(x)B(x)C + D(x)E matrix. Any multiplicative action by this matrix may be computed without opening the Kronecker products. This can save orders of magnitude in CPU time.

## Arguments

        cores -    a cell array of cell arrays of matrices
whose Konecker products make up the mat-
rix of interest.


## Outputs

        p     -    a polyadic representation of a matrix
that behaves in many respects like the
matrix it represents.


## Notes

Nested polyadics are permitted - the input matrices may be polyadics themselves.