[petsc-users] How to get the eigenvectors in Slepc

[Sonya Blade]

Even If I have normalization at the exact solution this doesn't explain
how the sign of it has changed, as a result square roots of sum of squares 
can never have negative value (vector length). 

Basically what I need to do, to get the Slepc results matching with the exact ones. 
Do I need to call any function before Slepc normalizes them or something else?

Regards,