]> https://gitweb.dealii.org/ - dealii-svn.git/commitdiff
Remove a comment that is no longer true: we have had the ability to
authorbangerth <bangerth@0785d39b-7218-0410-832d-ea1e28bc413d>
Thu, 16 Sep 2010 16:07:55 +0000 (16:07 +0000)
committerbangerth <bangerth@0785d39b-7218-0410-832d-ea1e28bc413d>
Thu, 16 Sep 2010 16:07:55 +0000 (16:07 +0000)
deal with chains of constraints since the hp-functionality was merged.

git-svn-id: https://svn.dealii.org/trunk@21996 0785d39b-7218-0410-832d-ea1e28bc413d

deal.II/lac/include/lac/constraint_matrix.h

index a30e41d48a3400b34ee66dfeab53a98eb20489c2..569a52e5efd014e3fa4a1ca751581de732a707c4 100644 (file)
@@ -614,55 +614,6 @@ class ConstraintMatrix : public Subscriptor
                                      * object may not be constrained in the
                                      * second. If this is nevertheless the
                                      * case, an exception is thrown.
-                                     *
-                                     * However, the following is possible:
-                                     * if DoF @p x is constrained to dofs
-                                     * @p x_i for some set of indices @p i,
-                                     * then the DoFs @p x_i may be further
-                                     * constrained by the constraints
-                                     * object given as argument, although
-                                     * not to other DoFs that are
-                                     * constrained in either of the two
-                                     * objects. Note that it is not
-                                     * possible that the DoFs @p x_i are
-                                     * constrained within the present
-                                     * object.
-                                     *
-                                     * Because of simplicity of
-                                     * implementation, and also to avoid
-                                     * cycles, this operation is not
-                                     * symmetric: degrees of freedom that
-                                     * are constrained in the given
-                                     * argument object may not be
-                                     * constrained to DoFs that are
-                                     * themselves constrained within the
-                                     * present object.
-                                     *
-                                     * The aim of these merging operations
-                                     * is that if, for example, you have
-                                     * hanging nodes that are constrained
-                                     * to the degrees of freedom adjacent
-                                     * to them, you cannot originally,
-                                     * i.e. within one object, constrain
-                                     * these adjacent nodes
-                                     * further. However, that may be
-                                     * desirable in some cases, for example
-                                     * if they belong to a symmetry
-                                     * boundary for which the nodes on one
-                                     * side of the domain should have the
-                                     * same values as those on the other
-                                     * side. In that case, you would first
-                                     * construct a costraints object
-                                     * holding the hanging nodes
-                                     * constraints, and a second one that
-                                     * contains the constraints due to the
-                                     * symmetry boundary. You would then
-                                     * finally merge this second one into
-                                     * the first, possibly eliminating
-                                     * constraints of hanging nodes to
-                                     * adjacent boundary nodes by
-                                     * constraints to nodes at the opposite
-                                     * boundary.
                                      */
     void merge (const ConstraintMatrix &other_constraints);
 

In the beginning the Universe was created. This has made a lot of people very angry and has been widely regarded as a bad move.

Douglas Adams


Typeset in Trocchi and Trocchi Bold Sans Serif.