http://www.maplecroftmaps.com/ ja Sun, 10 Aug 2008 12:12:50 +0900 Sun, 10 Aug 2008 12:12:50 +0900 http://www.maplecroftmaps.com/index.html Maple is a general-purpose commercial computer algebra system. It was first developed in 1980 by the Symbolic Computation Group at the University of Waterloo in Waterloo, Ontario, Canada. (wiki) Deut… Sun, 10 Aug 2008 12:12:50 +0900 http://www.maplecroftmaps.com/index.html