[ublas] LQ factorization with lapack bindings

From: Sorkin Dima (dsorkin_at_[hidden])
Date: 2007-12-22 14:32:07

Hi.
  I need to solve an undetermined system of equations
(minimum norm solution), several times, with the same
matrix. As far as I know Lapack does this via LQ
factorization.

  In bindings, only QR factorization currently exists.

1) Does someone have bindings for LQ ?

2) Is there a simple way to solve undetermined system
   using QR factorization + some tricks with transposes,
   using the existing bindings' functions ?
   The matrix A can be pretty big and I would prefer not to
   create copy of its transpose explicitly -
   is it unavoidable if I use QR ?

Thanks, regards,
  Dima.