Thread: Self outer product of a matrix

Hi

How can we find the self outer product of matrix A?




Thanks

Originally Posted by dimper129

Hi

How can we find the self outer product of matrix A?




Thanks

I'm afraid "self outer product" is not a common name for something in mathematics: what is it, exactly?

Tonio

The "outer product" of two n vectors is an n by n matrix and the tensor product (where two n by n tensor produce and "n by n by n by n" tensor) is often called an "outerproduct" so, at a guess, the "outer product" of two matrices written as n by m and j by k arrays is an n by m by j by k array (written in four dimensions, of course!) where the entry is .

That makes the calculation of this "outerproduct" easy but I'm not sure how one would represent that in 2D (on the screen).

Thank you