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Ublas :

From: Sorkin Dima (dsorkin_at_[hidden])
Date: 2006-11-13 05:28:28

  Question,less concerned uBLAS, but anyway.

Description: I have a stepping algorithm that solves
nonsquare ( n_rows > n_cols ) system of equations. The matrix is
regular sparse, size not huge (up to n_rows = 5000). On each step
I have a good initial guess from the previous iteration.
Solution in LSQR sense, or any other sense making sense :-)

1. Anyone knows of iterative solver code for LSQR problem in internet.
Or some well explained template for it ? I would prefer to be able to
adapt uBLAS matrix for it.

2. Same about family of sparse QR decompositions.

Thank you,