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rsmedleystevenson edited this page Oct 13, 2016
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Welcome to the TeaLeaf_Trilinos wiki!
The method used to test convergence of the solvers is different for preconditioned problems in the native and Trilinos codes. The native code uses sqrt(z'.r) instead of the 2-norm of r, but it could use the latter if we add a dot product computation and a corresponding extra reduction (or ideally a combined reduction with rrn) within the CG loop i.e. where we reduce rrn=z'.r.