> On Nov 4, 2014, at 2:13 PM, Brian Yang <[email protected]> wrote: > > Hi all, > > I am trying to solve Ax=0 with an initial values of x. I know > KSPSetInitialGuessNonzero is > able to disable the zero guess, so it will keep updating the initial x right?
What do you mean by “it will keep updating the initial x right”? What is “it” and what do you mean by “keep updating”. If you have not called KSPSetInitialGuessNonzero() then KSPSolve() will automatically zero x before starting the iteration. If you do call KSPSetInitialGuessNonzero() then KSPSolve will not automatically zero x before starting the iteration. That is all it does. Barry > > Thanks. > > -- > Brian Yang > U of Houston > > >
