Also known as the tensor product of linear maps in a particular basis: https://jeremykun.com/2014/01/17/how-to-conquer-tensorphobia/ https://jeremykun.com/2014

Also known as the tensor product of linear maps in a particular basis: https://jeremykun.com/2014/01/17/how-to-conquer-tensorphobia/ https://jeremykun.com/2014/01/17/how-to-conquer-tensorphobia... http://www.math.harvard.edu/archive/25b_spring_05/tensor.pdf http://www.math.harvard.edu/archive/25b_spring_05/tensor.pdf https://www.dpmms.cam.ac.uk/~wtg10/tensors3.html https://www.dpmms.cam.ac.uk/~wtg10/tensors3.html