What is this decomposition?

69 Views Asked by At

What is the name of the decomposition shown below? inea

1

There are 1 best solutions below

1
On BEST ANSWER

It is technically a QR factorisation (https://en.wikipedia.org/wiki/QR_decomposition#Rectangular_matrix).

It is quite trivial, but you can indeed observe that on the Right Hand Side, the matrix on the left is orthogonal, and the matrix on the right is upper-triangular.

Edit

As a commenter pointed out, the left matrix is not necessarily orthogonal. However, it at least has orthogonal columns (unless $f = 0$).