Use 2.6 Dune::Factorial

amdis/linearalgebra/mtl/SlotSize.hpp

@@ -43,8 +43,9 @@ namespace AMDiS
     void init(RowBasis const& rowBasis, ColBasis const& colBasis)
     {
       using GridView = typename RowBasis::GridView;
+      // TODO(FM): Simplify using Dune::factorial with 2.7
       static std::size_t surrounding
-        = Math::pow<GridView::dimension>(2) * Dune::factorial(int(GridView::dimension));
+        = Math::pow<GridView::dimension>(2) * Dune::Factorial<int(GridView::dimension)>::factorial;
 
       rows_ = rowBasis.dimension();
       cols_ = colBasis.dimension();