http://mathforum.org/kb List of forum topics en http://mathforum.org/kb/thread.jspa?messageID=8217186&tstart=0#8217186 Feb 1, 2013 11:27:05 AM Feb 1, 2013 11:27:05 AM trauth@geo.uni-potsdam.de 0 http://mathforum.org/kb/thread.jspa?messageID=8217187&tstart=0#8217187 ]]> Feb 1, 2013 11:27:04 AM Feb 1, 2013 11:27:04 AM 1