From: Timo Heister <timo.heister@gmail.com>
Date: Fri, 16 Feb 2018 15:14:03 +0000 (-0500)
Subject: document Functions::LSingularityFunction
X-Git-Tag: v9.0.0-rc1~430^2
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7c55534a53d76ecfd47e5ee5f30c8e507735db14;p=dealii.git

document Functions::LSingularityFunction
---

diff --git a/include/deal.II/base/function_lib.h b/include/deal.II/base/function_lib.h
index 6b61ac2ff0..48747e85bd 100644
--- a/include/deal.II/base/function_lib.h
+++ b/include/deal.II/base/function_lib.h
@@ -351,6 +351,10 @@ namespace Functions
   /**
    * Harmonic singularity on the L-shaped domain in 2D.
    *
+   * The function is given in polar coordinates by $r^{\frac{2}{3}}
+   * sin(\frac{2}{3} \phi)$ with a singularity in the origin and should be
+   * used with GridGenerator::hyper_L.
+   *
    * @ingroup functions
    * @author Guido Kanschat
    * @date 1999