From: Langou, Julien
Date: Mon, 26 Mar 2012 11:26:06 -0600
DTSQRT is not in LAPACK but you can have the same functionality and more by
using DTPQRT (which was added in 3.4.0, contribution form Rodney James).
DTPQRT generalizes and enable you to have DTSQRT, DTTQRT and more.
DTPQRT with L=0 is essentially DTSQRT.
DTPQRT with L=N is essentially DTTQRT.
Regarding the update routines (your question on DSSRFB), you can look at the
DTPMQRT subroutines. They should do what you want.
On Mar 23, 2012, at 5:06 AM, Ketan Singh wrote:
I am working on implementing a QR decomposition algorithm and I am unable to
find the DTSQRT, DSSRFB routines in lapack 3.4.0. I have tried searching it
in the source code, forums. Could you please give me any pointers to where
can I find the routines?
Thank you very much!
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