http://reply.papertrans.cn/2/150/14955/14955-11.png
Submitted on: 23 January 2014.
Revised on: 31 March 2014.
Accepted on: 24 May 2014.
___________________Journal de l Ecole Polytechnique-Mathematiques
Submitted on: 17 November 2009.
Revised on: 26 December 2009.
Accepted on: 19 February 2010.
___________________Journal de l Ecole Polytechnique-Mathematiques
http://reply.papertrans.cn/2/150/14955/14955-14.png
Submitted on: 24 March 2000.
Revised on: 29 June 2000.
Accepted on: 10 July 2000.
___________________Journal de l Ecole Polytechnique-Mathematiques
Submitted on: 07 October 2001.
Revised on: 11 November 2001.
Accepted on: 01 December 2001.
___________________Journal de l Ecole Polytechnique-Mathematiques
Submitted on: 03 May 2004.
Revised on: 26 June 2004.
Accepted on: 20 August 2004.
___________________Journal de l Ecole Polytechnique-Mathematiques
Submitted on: 06 February 2022.
Revised on: 08 March 2022.
Accepted on: 04 April 2022.
___________________Journal de l Ecole Polytechnique-Mathematiques
http://reply.papertrans.cn/2/150/14955/14955-19.png
http://reply.papertrans.cn/2/150/14955/14955-20.png