X-Git-Url: https://ginac.de/ginac.git//ginac.git?a=blobdiff_plain;f=ginac%2Findexed.h;h=06d36c717f5617f2d63f43a3640c33bda8370568;hb=ac6876ff6df9425a6076586796a57c7d13274df4;hp=f4891490a09d7d8b84521e17773977025074c11b;hpb=6d225ee55693c0617d254e6fa283c00c71bd2919;p=ginac.git

diff --git a/ginac/indexed.h b/ginac/indexed.h
index f4891490..06d36c71 100644
--- a/ginac/indexed.h
+++ b/ginac/indexed.h
@@ -3,7 +3,7 @@
  *  Interface to GiNaC's indexed expressions. */
 
 /*
- *  GiNaC Copyright (C) 1999-2004 Johannes Gutenberg University Mainz, Germany
+ *  GiNaC Copyright (C) 1999-2005 Johannes Gutenberg University Mainz, Germany
  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
@@ -172,7 +172,8 @@ public:
 	exvector get_dummy_indices() const;
 
 	/** Return a vector containing the dummy indices in the contraction with
-	 *  another indexed object. */
+	 *  another indexed object. This is symmetric: a.get_dummy_indices(b)
+	 *  == b.get_dummy_indices(a) */
 	exvector get_dummy_indices(const indexed & other) const;
 
 	/** Check whether the object has an index that forms a dummy index pair