From: Martin Kronbichler <martin.kronbichler@uni-a.de>
Date: Mon, 23 May 2022 12:15:06 +0000 (+0200)
Subject: Changelog
X-Git-Tag: v9.4.0-rc1~167^2
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ff356b5cd9f1bed9f0982c5fed61c756d0389f59;p=dealii.git

Changelog
---

diff --git a/doc/news/changes/minor/20220523Kronbichler b/doc/news/changes/minor/20220523Kronbichler
new file mode 100644
index 0000000000..ba66241dce
--- /dev/null
+++ b/doc/news/changes/minor/20220523Kronbichler
@@ -0,0 +1,7 @@
+New: PreconditionChebyshev can now also estimate eigenvalues with the power
+method, rather than the Lanczos algorithm underlying the SolverCG
+estimation. This is useful for matrices that are slightly non-symmetric such
+that the eigenvalue estimate of SolverCG breaks down, but not too much so that
+the Chebyshev iteration is still a useful iteration.
+<br>
+(Martin Kronbichler, 2022/05/23)