Creates an object of a polyadic class.
A polyadic is a matrix formed by a Kronecker product, with those products stored unopened. For example,
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.
cores - a cell array of cell arrays of matrices whose Konecker products make up the mat- rix of interest.
p - a polyadic representation of a matrix that behaves in many respects like the matrix it represents.
Nested polyadics are permitted - the input matrices may be polyadics themselves.
Version 2.1, authors: Ilya Kuprov