The author checked the published article in detail and found that the proof of "periodicity" is not strict. The author voluntarily withdraws the manuscript.

The paper has been retracted according to author’s withdrawal request. 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: Editorial Board of AM.

Please see the article page for more details. The full withdrawal notice in PDF is preceding the original paper which is marked "RETRACTED".