Does there exist a QL decomposition?

I've read about the QR-decomposition and I wonder if there is an algorithm that does the factorization

is a lower triangular matrix? I couldn't find the code or pseudo-code anywhere.

Answer 1

[Walter Roberson]

https://www.mathworks.com/matlabcentral/fileexchange/16536-qr-rq-ql-lq-factorizations