[petsc-users] Solving multiple linear systems with similar matrix sequentially

[domenico lahaye]

Hi, 

  Contingency analysis of power systems requires to solve a sequence 
a (non-)linear systems in which the Jacobian/matrix changes by a 
rank-2/rank-1 update. 

   Does the PETSc interface to GAMG allow to freeze the AMG hierarchy 
for a given matrix (base case) and to reuse this hierarchy in solving a list of 
slightly perturbed linear problems (list of contingencies)? 

  Thanks, Domenico. 
  
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