El 21/03/2013, a las 17:20, Zhang Wei escribi?: > 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
