From 4132fc26fd3497ae5b14fba50fcce63b0c317ccb Mon Sep 17 00:00:00 2001
From: Alexander Sikorski <sikorski@zib.de>
Date: Fri, 19 Feb 2021 11:06:31 +0100
Subject: [PATCH] krylovschur: set error computation to abs

default is relative eigenvalue error, which leads to problems for very stationary generator with eigenvalues around 0
---
 src/cmdtools/analysis/schur.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/cmdtools/analysis/schur.py b/src/cmdtools/analysis/schur.py
index a9933f5..84b1b57 100644
--- a/src/cmdtools/analysis/schur.py
+++ b/src/cmdtools/analysis/schur.py
@@ -103,6 +103,7 @@ def krylovschur(A, n, massmatrix=None, onseperation=DEFAULT_ONSEPERATION, which=
     E = SLEPc.EPS().create()
     E.setOperators(M)
     E.setDimensions(nev=n)
+    E.setConvergenceTest(E.Conv.ABS)
     E.setTolerances(tolerance, maxiter)
     if which == "LR":
         E.setWhichEigenpairs(E.Which.LARGEST_REAL)