From: Peter Munch <peterrmuench@gmail.com>
Date: Sat, 22 May 2021 16:47:40 +0000 (+0200)
Subject: Fix docu
X-Git-Tag: v9.4.0-rc1~1292^2
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ae8b79e9d2d796dcc11db8a7b6898a17b4bc8d05;p=dealii.git

Fix docu
---

diff --git a/include/deal.II/multigrid/mg_transfer_global_coarsening.h b/include/deal.II/multigrid/mg_transfer_global_coarsening.h
index fe87c32ebc..ac69a751b7 100644
--- a/include/deal.II/multigrid/mg_transfer_global_coarsening.h
+++ b/include/deal.II/multigrid/mg_transfer_global_coarsening.h
@@ -144,8 +144,9 @@ class MGTwoLevelTransfer<dim, LinearAlgebra::distributed::Vector<Number>>
 {
 public:
   /**
-   * Set up global coarsening transfer @p transfer between the given
-   * dof-handlers.
+   * Set up global coarsening between the given DoFHandler objects (
+   * @p dof_handler_fine and @p dof_handler_coarse). The transfer
+   * can be only performed on active levels.
    */
   void
   reinit_geometric_transfer(const DoFHandler<dim> &          dof_handler_fine,
@@ -154,8 +155,10 @@ public:
                             const AffineConstraints<Number> &constraint_coarse);
 
   /**
-   * Set up polynomial coarsening transfer @p transfer between the given
-   * dof-handlers.
+   * Set up polynomial coarsening between the given DoFHandler objects (
+   * @p dof_handler_fine and @p dof_handler_coarse). Polynomial transfers
+   * can be only performed on active levels (`numbers::invalid_unsigned_int`)
+   * or on coarse-grid levels.
    *
    * @note The function polynomial_transfer_supported() can be used to
    *   check if the given polynomial coarsening strategy is supported.