topic It may be caused the ill in Intel® oneAPI Math Kernel Library

Low Accuracy with CG Solver ?

Markus__G_ — Sun, 18 May 2014 15:02:20 GMT

I am just wondering why , the CG Solver is so inaccurate and also in some cases the solver doesnt covert. So how to make the solution of x more accurate and how to set the maximum number of itereations to a higher bound. Into the attachment my adapted files from the standard example,the input are just mkl files. In some cases it works,but in most cases the obtained solution is far away from the real solution.

best regard

It may be caused the ill

Gennady_F_Intel — Sun, 18 May 2014 17:37:06 GMT

It may be caused the ill-conditioning the input matrices. Have you checked these cases?

na not really, do u think

Markus__G_ — Sun, 18 May 2014 17:39:44 GMT

na not really, do u think that those matrices from matrix market are ill conditioned ?

Is it possible to say me some

Markus__G_ — Mon, 19 May 2014 07:35:11 GMT

Is it possible to say me some good parameters to improve the accuracy and conergence of the solver ?

best regards