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[Lapack] question using routine DGGSVD in CLAPACK


I am using the routine DGGSVD (CLAPACK) to solve constrained least 
squares problems.  To do this I need to form a matrix X from Q and R 
as discussed in GSVD literature.  However, the matrix R does not seem 
to be given in a format that is invertible as needed.  Have you 
experienced issues like this or know someone who might have?
Eric Loomis
P-24 plasma physics
Los Alamos National Laboratory
mailstop E526

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