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Subject: Re: [ublas] ublas double precision issues
From: Umut Tabak (u.tabak_at_[hidden])
Date: 2011-06-13 11:47:16

On 06/13/2011 02:11 PM, Umut Tabak wrote:
> Dear all,
> I have implemented a lanczos solver in ublas, however there is a
> subtle question from the point of view of accuracy related to floating
> point operations.
As a follow up to my question, the algorithm does some
orthogonalizations, using the inner_prod function, this is where the
accuracy is being lost. Could you comment on this also?

If I have a thousand ideas and only one turns out to be good,
I am satisfied.
Alfred Nobel