I am no longer reading mail sent to my Princeton account. Please see 'http COLON SLASH SLASH www DOT shimizu HYPHEN blume DOT com SLASH matthias SLASH' to find out how I can be reached these days. (Sorry about the obfuscation. Recently a lot of spam has reached me via the Princeton mail account, and I don't want to give spammers an easy way of updating their databases.) Sincerely, Matthias Blume