Linear Algebra assistance

[Rowan Cannaday]

Is anybody familiar with the QR algorithm, or the notation used in Golub & Van Loan's book "Matrix Computations"?

I am working my way towards building an APL linear algebra toolkit, and am having trouble deciphering what some of the steps signify.

Any other communities that might be able to assist me is also helpful - for example a mailing list.

The 4th edition should be available as a PDF online (although I will not link to it), and my specific question is linked below:
https://math.stackexchange.com/questions/3648588/implementing-qr-algorithm-from-golub-van-loans-matrix-computations-notati

Figured it would be worth a shot.

Cheers y'all.

- Rowan