There is a much more thorough and eloquent explanation in the following link. [http://www.ams.org/notices/200604/fea-franzen.pdf http://www.ams.org/notices/2006

There is a much more thorough and eloquent explanation in the following link. [http://www.ams.org/notices/200604/fea-franzen.pdf http://www.ams.org/notices/200604/fea-franzen.pdf] Thanks for the link.