different results between PARDISO, DSS and ZGESV

pkalozoum — Sat, 29 May 2010 10:02:06 GMT

Hello everybody,

I would like your opinion in the following problem. I' m trying to solve a complex, unsymmetric matrix (588x588) and as a test for the result accuracy I used ZGESV, PARDISO and DSS. ZGESV seems to give the best result according to the expected solution. DSS in the begining gives slightly different numbers and then converges to the results of ZGESV while PARDISO gives the first numbers same as ZGESV and then diverges from the ZGESV solution.

Any ideas of what is wrong please?

Thanks

Panayotis

different results between PARDISO, DSS and ZGESV

mecej4 — Sat, 29 May 2010 14:06:48 GMT

Please clarify what you mean by "solve a matrix". Are you solving Ax = b for x, where A is the matrix that you write about? Or are you finding singular values? Similarly, what do you mean by "result"? How was the "expected solution" obtained?

Let us first establish that there is something wrong before we ask what caused it.

topic different results between PARDISO, DSS and ZGESV in Intel® oneAPI Math Kernel Library

different results between PARDISO, DSS and ZGESV

different results between PARDISO, DSS and ZGESV