From 6b7d17d91e437125ea68e9ac870f51968885ab28 Mon Sep 17 00:00:00 2001
From: astrojhgu <astrojhgu@ed2142bd-67ad-457f-ba7c-d818d4011675>
Date: Mon, 9 Apr 2012 09:22:31 +0000
Subject: git-svn-id: file:///home/svn/opt_utilities@234
 ed2142bd-67ad-457f-ba7c-d818d4011675

---
 methods/conjugate_gradient/conjugate_gradient.hpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/methods/conjugate_gradient/conjugate_gradient.hpp b/methods/conjugate_gradient/conjugate_gradient.hpp
index f5befd7..edec92d 100644
--- a/methods/conjugate_gradient/conjugate_gradient.hpp
+++ b/methods/conjugate_gradient/conjugate_gradient.hpp
@@ -150,6 +150,11 @@ namespace opt_utilities
 	      b1+=Delta_Xn[i]*(Delta_Xn[i]-Delta_Xn1[i]);
 	      b2+=Delta_Xn1[i]*Delta_Xn1[i];
 	    }
+	  if(b2==0)
+	    {
+	      end_point=xn;
+	      return end_point;
+	    }
 	  betan=max(rT(0),b1/b2);
 	  ////
 	  for(size_t i=0;i<get_size(start_point);++i)
-- 
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