[petsc-users] problem of getting eigenvector

[Jose E. Roman]

El 21/03/2013, a las 17:20, Zhang Wei escribió:

> Hi
> 
> I am using EPSGetEigenpair() command to get eigenvector for maxtrix-free
> problem. it seems this command still will load the operator to calculate
> the eigenpairs. does anyone can tell me the reason to do so? for me I
> think when solver get converged , the eigenpairs are already get.. there
> is no need to do so.
> 
> Wei
> 

In some cases, the operator can be used for purification of the computed eigenvectors, to get rid of components in the nullspace of B in generalized problems. Can you provide more information?

Jose