Add docu.

dune/matrix-vector/triangularsolve.hh

@@ -3,6 +3,11 @@
 
 namespace Dune {
 namespace MatrixVector {
+
+  /**
+   * \brief Solves L*x=b where L is a lower triangular matrix.
+   * \param transpose Set true if L is passed as an upper triangular matrix.
+   */
   template <class Matrix, class Vector, class BitVector>
   static void lowerTriangularSolve(Matrix const& L, Vector b, Vector& x,
                                    BitVector const* ignore,
@@ -40,6 +45,10 @@ namespace MatrixVector {
     }
   }
 
+  /**
+   * \brief Solves U*x=b where U is an upper triangular matrix.
+   * \param transpose Set true if U is passed as a lower triangular matrix.
+   */
   template <class Matrix, class Vector, class BitVector>
   static void upperTriangularSolve(Matrix const& U, Vector b, Vector& x,
                                    BitVector const* ignore,