My friend RobinNewton pointed me at all this.  I am frankly impressed at
an excellent information-sharing mechanism.  You can find my scribblings on
the web at http://www.chaos.org.uk/~eddy/ , and if you know of a mathematical wiki, please tell me where to find it - ''eg'' by adding to this page ;^)

''Hi Eddy - are you the Eddy I knew at Cambridge? Do you know Andrew Lipson? Are you still here?''
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