questions on kohonen's maps

[chrisley.pa@Xerox.COM]

One further note about Ananth Sankar's questions about Kohonen maps:

A friend of mine, Tony Bell, tells me (and Ananth) that Helge Ritter has 
a "neat set of expressions for the learning rate and neighbourhood size
parameters... and he also proves something about congergence elsewhere."

Unfortunately, I do not as yet have a reference for the papers, but I have
liked Ritter's work in the past, so I thought people on the net might be
interested.