Submitted on: 08 September 2018.
Revised on: 11 December 2018.
Accepted on: 27 January 2019.
___________________Contemporary Mathematics---UNIVERSAL WISER PUBLISHER
Submitted on: 08 August 2017.
Revised on: 23 October 2017.
Accepted on: 14 December 2017.
___________________Contemporary Mathematics---UNIVERSAL WISER PUBLISHER
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http://reply.papertrans.cn/1/65/6441/6441-14.png
Submitted on: 13 September 2018.
Revised on: 08 January 2019.
Accepted on: 27 January 2019.
___________________Contemporary Mathematics---UNIVERSAL WISER PUBLISHER
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Submitted on: 12 October 2003.
Revised on: 05 December 2003.
Accepted on: 11 January 2004.
___________________Contemporary Mathematics---UNIVERSAL WISER PUBLISHER
Submitted on: 01 October 2023.
Revised on: 03 January 2024.
Accepted on: 20 February 2024.
___________________Contemporary Mathematics---UNIVERSAL WISER PUBLISHER
Submitted on: 29 December 2000.
Revised on: 04 April 2001.
Accepted on: 18 May 2001.
___________________Contemporary Mathematics---UNIVERSAL WISER PUBLISHER
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