International Journal of Pure and Applied Mathematics is a mathematical journal for publishing early, high-impact results in the areas of mathematics and computer science/informatics. The journal also emphasizes mathematical articles devoted to the mathematical treatment of questions arising in physics, chemistry, biology, engineering and all applied sciences. Although the journal focuses on the original research articles, it also welcomes reviews and short notes. With the publication of the November 2016 issue, IJPAM has concluded it's 15-th year of publication of high-quality research articles. Over the past years, we have seen significant growth: The metric factor "cites per paper" (impact of the journal) has become 7.19 (The IJPAM indexes and impact are calculated using Harzing's Publish or Perish software, based on Google Scholar on 15.10.2017). For this success, we are thankful to our Editorial Board, authors e lly, and readers. Authors are cordially invited to submit papers using our Submission Center. Manuscripts submitted to this journal will be considered for publication with the understanding that the same work has not been published and is not under consideration for publication elsewhere.