Part 2 to 6 of the paper explains the elements of notation I used. The algorithm I wrote had to do with both the usual matrix product and the kronecker product

Part 2 to 6 of the paper explains the elements of notation I used. The algorithm I wrote had to do with both the usual matrix product and the kronecker product (in short it lets you compute the Kronecker product of several matrices together time a given matrix much more efficiently and with a significantly lower memory usage). The notation was useful to me as it surfaces the property Wikipedia describes in the "Matrix Equation" [0] section on the Kronecker product and makes it intuitive. [0]: https://en.wikipedia.org/wiki/Kronecker_product#Matrix_equations https://en.wikipedia.org/wiki/Kronecker_product#Matrix_equat...