[petsc-users] zero diagonal values and Jacobi preconditioner

Dominik Szczerba dominik at itis.ethz.ch
Tue Nov 15 05:17:13 CST 2011

What will happen if my matrix has (close to, or exactly) zeros on the
diagonal? Does Petsc handle such cases smartly somehow or am I right
to expect poor convergence (values close to zero) or failure (values
exactly zero)?

Many thanks,

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