Submitted on: 24 July 2014.
Revised on: 31 August 2014.
Accepted on: 13 September 2014.
TOHOKU MATHEMATICAL JOURNAL
Submitted on: 01 July 2023.
Revised on: 17 July 2023.
Accepted on: 02 August 2023.
TOHOKU MATHEMATICAL JOURNAL---TOHOKU UNIVERSITY
Submitted on: 24 March 2022.
Revised on: 01 May 2022.
Accepted on: 21 May 2022.
TOHOKU MATHEMATICAL JOURNAL
http://reply.papertrans.cn/3/296/29579/29579-14.png
Submitted on: 22 November 2005.
Revised on: 02 January 2006.
Accepted on: 25 January 2006.
TOHOKU MATHEMATICAL JOURNAL---TOHOKU UNIVERSITY
http://reply.papertrans.cn/3/296/29579/29579-16.png
Submitted on: 25 March 2009.
Revised on: 09 April 2009.
Accepted on: 01 May 2009.
TOHOKU MATHEMATICAL JOURNAL---TOHOKU UNIVERSITY
http://reply.papertrans.cn/3/296/29579/29579-18.png
Submitted on: 03 April 2000.
Revised on: 15 April 2000.
Accepted on: 09 May 2000.
TOHOKU MATHEMATICAL JOURNAL
http://reply.papertrans.cn/3/296/29579/29579-20.png