Solving a singular matrix with BoomerAMG

Thomas Witkowski thomas.witkowski at
Thu Nov 5 03:43:56 CST 2009

I want so solve a system with a singular matrix (just the laplace 
discretized with the fem using pure Neumann boundary conditions) with 
BoomerAMG. Is there any way to do it directly in BoomerAMG/PETSc, or 
must I change the matrix to make it nonsingular?


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