http://reply.papertrans.cn/3/205/20449/20449-21.png
Submitted on: 31 January 2009.
Revised on: 16 February 2009.
Accepted on: 11 March 2009.
Kyushu Journal of Mathematics---KYUSHU UNIV, FAC MATHEMATICS
Submitted on: 26 June 2001.
Revised on: 08 August 2001.
Accepted on: 19 August 2001.
Kyushu Journal of Mathematics
Submitted on: 17 April 2012.
Revised on: 30 May 2012.
Accepted on: 12 June 2012.
Kyushu Journal of Mathematics---KYUSHU UNIV, FAC MATHEMATICS
http://reply.papertrans.cn/3/205/20449/20449-25.png
Submitted on: 25 June 2018.
Revised on: 03 August 2018.
Accepted on: 15 August 2018.
Kyushu Journal of Mathematics
Submitted on: 27 December 2005.
Revised on: 15 January 2006.
Accepted on: 11 February 2006.
Kyushu Journal of Mathematics---KYUSHU UNIV, FAC MATHEMATICS
http://reply.papertrans.cn/3/205/20449/20449-28.png
Submitted on: 26 July 2004.
Revised on: 12 August 2004.
Accepted on: 28 August 2004.
Kyushu Journal of Mathematics---KYUSHU UNIV, FAC MATHEMATICS
Submitted on: 20 January 2017.
Revised on: 04 March 2017.
Accepted on: 29 March 2017.
Kyushu Journal of Mathematics---KYUSHU UNIV, FAC MATHEMATICS