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deflation does not work together with SSE 2/3 (28.8.2013)
the scalar version (no MPI) does not work properly, it produces either a wrong little Dirac operator or the block boundaries are not treated correctly. With MPI different parallelisations and block numbers give identical results, though.
new features
changed the preconditioning in FGMRES as suggested in arXiv:1303.1377
included a deflated PCG solver with deflation subspace generation