From: Denis Davydov <davydden@gmail.com>
Date: Mon, 18 Dec 2017 17:15:05 +0000 (+0100)
Subject: add a link to LAPACK forums
X-Git-Tag: v9.0.0-rc1~638^2~2
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6c00ae5a2d1d0646a49866ba8e0afcc160671eb3;p=dealii.git

add a link to LAPACK forums
---

diff --git a/source/lac/lapack_full_matrix.cc b/source/lac/lapack_full_matrix.cc
index db569d11a6..5645f64f4e 100644
--- a/source/lac/lapack_full_matrix.cc
+++ b/source/lac/lapack_full_matrix.cc
@@ -226,6 +226,7 @@ namespace
     // 6.5.4 Cholesky Updating and Downdating, Golub 2013 Matrix computations
     // Note that potrf() is called with LAPACKSupport::L , so the
     // factorization is stored in lower triangular part.
+    // Also see discussion here http://icl.cs.utk.edu/lapack-forum/viewtopic.php?f=2&t=2646
     if (a > 0.)
       {
         // simple update via a sequence of Givens rotations.