> said above, I think that your ideas are quite similar to Richman's. His > article is also available on the web at > > <http://www.math.fau.edu/Richman/HTML/999.htm>. > > David
Thanks for pointing that out David. I had been aware of his page and had already sent him a copy of my proof. You would have been making that possible had I not already been aware, so again, thank you.
