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Submitted on: 17 September 2008.
Revised on: 29 October 2008.
Accepted on: 20 December 2008.
___________________COMMUNICATIONS IN CONTEMPORARY MATHEMATICS
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Submitted on: 20 November 2024.
Revised on: 12 December 2024.
Accepted on: 29 December 2024.
___________________COMMUNICATIONS IN CONTEMPORARY MATHEMATICS
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Submitted on: 11 April 2004.
Revised on: 22 May 2004.
Accepted on: 11 July 2004.
___________________COMMUNICATIONS IN CONTEMPORARY MATHEMATICS