Question: I want to implement block preconditioner with gmres for saddle point problem. I 've read HSS preconditioner from paper A RELAXED HSS PRECONDITIONER FOR SADDLE

I want to implement block preconditioner with gmres for saddle point problem. I 've read HSS preconditioner from paper "A RELAXED HSS PRECONDITIONER FOR SADDLE POINT PROBLEMS FROM MESHFREE DISCRETIZATION".

I don't khow how to implement HSS algorithm with gmres method in matlab for saddle point problem ?

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