### How to do A*B and A*x only

Posted:

**Wed Apr 03, 2013 10:28 pm**Hi!

I am trying to use Jacobi iteration on magma. And I know the functions(sgemv and sgemm), but it must be A*B + C and A*X + y, which do something unnecessary. Does the lapack or magma fix this problem, or if I put zero in C or y, it will not be computed?

Thanks for answering.

David

I am trying to use Jacobi iteration on magma. And I know the functions(sgemv and sgemm), but it must be A*B + C and A*X + y, which do something unnecessary. Does the lapack or magma fix this problem, or if I put zero in C or y, it will not be computed?

Thanks for answering.

David