Re: [petsc-users] problem with CISS in SLEPC

2019-07-11 Thread Jose E. Roman via petsc-users
Internally the solver builds a subspace of dimension L*M, which defaults to 128. See the details here http://slepc.upv.es/documentation/reports/str11.pdf I guess the method is not prepared for smallish matrices. Try reducing the values of L and M. Jose > El 11 jul 2019, a las 19:43, Matthew

[petsc-users] problem with CISS in SLEPC

2019-07-11 Thread Povolotskyi, Mykhailo via petsc-users
Hello, I want to use CISS for my eigenvalue problem. To test it I tried a simple (2x2) matrix case, but the code failed with the following message: [0]PETSC ERROR: - Error Message -- [0]PETSC ERROR: Error in