My email address has been changed. From now on, please write to [EMAIL PROTECTED] The "tip" user at the same host no longer exists. Sorry for the inconvenience if you tried to send a message to the "tip" user this week. Have a nice day, :^) Zoltan -- Kov\'acs, Zolt\'an [EMAIL PROTECTED] http://www.math.u-szeged.hu/~kovzol ftp://pc10.radnoti-szeged.sulinet.hu/home/kovacsz