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Published 20 hours ago • verified publisher icon reinh-bader

test fgsl_linalg_qrpt_lssolve2 in linalg fails

Open reinh-bader opened this issue 11 months ago • 2 comments

build with ifx causes one test in linalg (fgsl_linalg_qrpt_lssolve2:x) to fail

Intel(R) Fortran Compiler for applications running on Intel(R) 64, Version 2024.0.2 Build 20231213 OS: Ubuntu 20.04.6 LTS / executing under WSL 2

reinh-bader avatar Mar 23 '24 12:03 reinh-bader

Depending on compiler and platform, the solution vector oscillates between [ 2.,-1.,0.] and [1.,0.,1.]. Further investigation will be needed.

reinh-bader avatar May 28 '24 16:05 reinh-bader

Further observation: It is already the prior call to fgsl_linalg_qrpt_decomp with a rank-deficient argument a that produces divergent results. The test is commented out for now. Next step would be to reproduce this in C.

reinh-bader avatar Jun 06 '24 10:06 reinh-bader