Submitted on: 15 July 2007.
Revised on: 09 August 2007.
Accepted on: 22 August 2007.
___________________Groups Geometry and Dynamics---EUROPEAN MATHEMATICAL SOC-EMS
Submitted on: 03 April 2004.
Revised on: 17 May 2004.
Accepted on: 03 July 2004.
___________________Groups Geometry and Dynamics---EUROPEAN MATHEMATICAL SOC-EMS
Submitted on: 22 March 2008.
Revised on: 06 May 2008.
Accepted on: 14 June 2008.
___________________Groups Geometry and Dynamics---EUROPEAN MATHEMATICAL SOC-EMS
http://reply.papertrans.cn/2/110/10970/10970-34.png
http://reply.papertrans.cn/2/110/10970/10970-35.png
http://reply.papertrans.cn/2/110/10970/10970-36.png