Thank you all. On Friday, September 26, 2014 2:50:56 AM UTC+8, Jason Riedy wrote: > > > Others have given some reasons... If you want to see contortions > that were (perhaps still are) necessary to be competitive, see: > > https://groups.google.com/forum/#!msg/julia-users/DJRxApmpJmU/NqepNaX5ARIJ > This article is expert but as you say, they are not clear and straight. Is it possible to call BLAS-3 an easy way?
> However, if your matrices always have this form, I would highly > recommend solving a few by hand to notice the pattern. Good observation and sense! Yes, I know that can be calculated by hand. I use this matrix in a case related to sparse matrix.
