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The paper does not meet the standards of
\"Advances in Pure Mathematics\".
This article has been retracted to
straighten the academic record. In making this decision the Editorial Board
follows COPE's Retraction Guidelines. The aim is to promote the circulation of scientific research by
offering an ideal research publication platform with due consideration of
internationally accepted standards on publication ethics. The Editorial Board
would like to extend its sincere apologies for any inconvenience this
retraction may have caused.
Editor guiding this retraction: Prof.
Dexing Kong (EiC of APM)
retraction notice in PDF is preceding the original paper, which is marked