Submitted on: 25 January 1999.
Revised on: 20 February 1999.
Accepted on: 09 March 1999.
Revue d Histoire des Mathematiques
http://reply.papertrans.cn/3/272/27130/27130-12.png
http://reply.papertrans.cn/3/272/27130/27130-13.png
http://reply.papertrans.cn/3/272/27130/27130-14.png
http://reply.papertrans.cn/3/272/27130/27130-15.png
Submitted on: 16 January 2001.
Revised on: 23 February 2001.
Accepted on: 10 March 2001.
Revue d Histoire des Mathematiques
http://reply.papertrans.cn/3/272/27130/27130-17.png
http://reply.papertrans.cn/3/272/27130/27130-18.png
http://reply.papertrans.cn/3/272/27130/27130-19.png
http://reply.papertrans.cn/3/272/27130/27130-20.png