[petsc-users] question about KSPSetOperators

[Barry Smith]

  Yes, see MatCreateShell() and MatShellSetOperation()

  Barry

> On Feb 27, 2015, at 3:42 AM, Sun, Hui <hus003 at ucsd.edu> wrote:
> 
> For KSPSetOperators or KSPSetComputeOperators, one needs to define the matrix. Now, instead of specifying the matrix, is it possible to define a linear operator, say LinearOperator(Vec input, &Vec output), and set it to be the KSP operator? 
> 
> Thank you. 
> Hui