]> https://gitweb.dealii.org/ - dealii-svn.git/commitdiff
Documentation clarified
authorguido <guido@0785d39b-7218-0410-832d-ea1e28bc413d>
Mon, 16 Dec 2002 11:28:11 +0000 (11:28 +0000)
committerguido <guido@0785d39b-7218-0410-832d-ea1e28bc413d>
Mon, 16 Dec 2002 11:28:11 +0000 (11:28 +0000)
git-svn-id: https://svn.dealii.org/trunk@6820 0785d39b-7218-0410-832d-ea1e28bc413d

deal.II/lac/include/lac/precondition_block.h

index b251d65737d20b8a1bf604925f6fc46e2c7baba7..f5af2a83e2a185221c1c3b5965adf58397c57290 100644 (file)
@@ -448,7 +448,18 @@ class PreconditionBlockSOR : public virtual Subscriptor,
     void vmult (Vector<number2>&, const Vector<number2>&) const;
 
                                     /**
-                                     * Transpose of @ref{vmult}
+                                     * Backward application of @ref{vmult}.
+                                     *
+                                     * In the current implementation,
+                                     * this is not the transpose of
+                                     * @ref{vmult}. It is a
+                                     * transposed Gauss-Seidel
+                                     * algorithm applied to the whole
+                                     * matrix, but the diagonal
+                                     * blocks being inverted are not
+                                     * transposed. Therefore, it is
+                                     * the transposed, if the
+                                     * diagonal blocks are symmetric.
                                      */
     template <typename number2>
     void Tvmult (Vector<number2>&, const Vector<number2>&) const;

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