• Jö Fahlke's avatar
    [!226] [bugfix] [solvers.hh] Set initial search direction of the flexible cg solver to zero · 34f8fff9
    Jö Fahlke authored
    Merge branch 'bugfix/fcg-initial-direction' into 'master'
    
    This adds a missing reset of the vector for the initial direction in the first
    iteration of the apply method.
    
    In the current state the vector for the search direction contains the initial
    solution in the first iteration. Most of the standard preconditioners will add
    their result to the vector instead of replacing it. If the initial solution is
    not zero, this results in an incorrect first search direction.
    
    See merge request [!226]
    
      [!226]: gitlab.dune-project.org/core/dune-istl/merge_requests/226
    34f8fff9
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